[CI Skip] 1.16.1

skip-checks: true

.123trigger

@@ -1,3 +1,5 @@
-20
- 1.4.2
-1.6.2
+24
+1.4.2
+1.6.2
+1.11.2
+1.12.2

.eslintignore

@@ -1,3 +1,4 @@
+.eslintrc.js
 **/build/*
 **/coverage/*
 **/node_modules/*

.github/workflows/pr-any.yml

@@ -10,9 +10,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - uses: actions/setup-node@v1
-      with:
-        node-version: '12.x'
     - name: ${{ matrix.step }}
       run: |
         yarn install --immutable | grep -v 'YN0013'

.github/workflows/push-master.yml

@@ -10,15 +10,12 @@ jobs:
       matrix:
         step: ['build:release', 'docs:release']
     name: ${{ matrix.step }}
-    if: "! contains(github.event.head_commit.message, '[CI Skip]')"
+    if: "! contains(github.event.head_commit.message, '[CI Skip]') && github.repository == 'polkadot-js/api'"
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
       with:
         token: ${{ secrets.GH_PAT }}
-    - uses: actions/setup-node@v1
-      with:
-        node-version: '12.x'
     - name: ${{ matrix.step }}
       env:
         CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}

CHANGELOG.md

@@ -1,6 +1,123 @@
+# 1.16.1 May 26, 2020
+
+- Support for Polkadot CC1 types & signed extensions
+- Add support for Babe VRF secondary digests (author extraction)
+- Adjust `Perbill/Permill` `toHuman()` formatting to output percentage
+- Support for latest Substrate types & metadata
+- Update to latest TypeScript, eslint & typescript-eslint
+- `@polkadot/util` 2.11
+
+# 1.15.1 May 23, 2020
+
+- Adjust `keyPrefix()` with DoubleMap args (Thanks to https://github.com/KiChjang)
+- Added `WeightToFeeCoefficient` type (Thanks to https://github.com/danforbes)
+- Spelling fixes for console logs (Thanks to https://github.com/JoshOrndorff)
+- Spelling fixes in cookbook (Thanks to https://github.com/pawelnguyen)
+- Add `transactionVersion` getter in payloads (Thanks to https://github.com/amaurymartiny)
+- Adjust `stakerRewards` derive ordering for improved on-payout refreshes
+- Baseline implementation for derive caching infrastructure
+- Adjust `Multiplier` type to `Fixed128` (as per latest Substrate)
+- Updated to latest Substrate metadata & add new types
+
+# 1.14.1 May 14, 2020
+
+- **Important** `DispatchInfo` changed `paysFee` to an enum, if using an older version use, `DispatchInfo: 'DispatchInfoTo244'`
+- Align imOnline `Heartbeat` with Substrate (Thanks to https://github.com/arjanz)
+- Adust EVM types to include `Vicinity` (Thanks to https://github.com/drewstone)
+- Add `derive.democracy.locks` to return extended lock info based on votes
+- Ensure metadata is only requested once upon startup (bypass on upgrade subscriptions)
+- Expand testing around `ExtrinsicEra` construction
+- Expand `Registry` to direct access to available signed extensions (in addition to exposed types)
+- Cater for new `CheckSpecVersion` and `CheckTxVersion` signed extensions (with `SignerPayload` adjustments)
+- Cater for new `PrevalidateAttests` signed extensions (Polkadot claims)
+- Don't re-calculate submittable extrinsic hash on status checks (optimization)
+- Support for both old/new Tuples in `democracy.depositOf` in derives
+- Fix democracy `ProxyState` types
+- Extends types for Polkadot claims
+- Update `@polkadot/util` to 2.10
+
+# 1.13.1 May 6, 2020
+
+- Add support for ECDSA keypairs in extrinsic signers (Thanks to https://github.com/akru)
+- Rework type generation to use templating for better maintenance (Thanks to https://github.com/xlc)
+- Adjust extrinsic `sign/signAsync` signature to optional options (Thanks to https://github.com/KiChjang)
+- Support round-robin endpoints in the `WsProvider` with array of urls (Thanks to https://github.com/hoani)
+- Remove static test-only metadata for Polkadot dev chains (not updated regularly, Substrate dev to remain)
+- Revert error swallow for wrong preimage data (temp. override for Kusama upgrade with no migration)
+- Fix `.encodedLength` calculation on `[Type; N]` types
+- Add new `rpc.grandpa.roundState` RPC
+- Update types & metadata as per latest Substrate master
+- Adjust Centrifuge starting version
+
+# 1.12.2 Apr 30, 2020
+
+- Update `@polkadot/util` to stable 2.9.1 (sadly missed in the previous version, stable should match to stable)
+
+# 1.12.1 Apr 29, 2020
+
+- Fix `CompactAssignments` types (Thanks to https://github.com/arjanz)
+- Provider ayo-connect now allows for interval config (Thanks to https://github.com/jnaviask)
+- Cleanup generation for c-like enums (Thanks to https://github.com/monitz87)
+- Allow subscription to all storage keys, alignment with Substrate (Thanks to https://github.com/xlc)
+- Cater for vote delegations in democracy derives
+- Cleanup account derive flags where to allow for optional council modules
+- Allow generic types in ApiPromise.combineLatest
+- Update to latest substrate metadata
+
+# 1.11.2 Apr 22, 2020
+
+- Small patch to add missing Polkadot master types (will be in next Kusama update)
+
+# 1.11.1 Apr 21, 2020
+
+- **Important** Substrate master has an updated `Weight` (to `u64`), on older chains apply `Weight: 'u32'` (This does affect event decoding if wrongly set)
+- Allow user type augmentation to work with different versions of rxjs (Thanks to https://github.com/monitz87)
+- Align augmented generation with camelCase (Thanks to https://github.com/monitz87)
+- Fix bitfield endian encoding (Thanks to investigation by https://github.com/xlc)
+- Add account flag derives via `accounts.flags(accountId)` (Thanks to https://github.com/kwingram25)
+- Fix entries decoding for `Option<Number>` (& simplify, decoding correctly on rpc layer)
+- Add `system.{localPeerId, localListenAddresses}` & `state.getReadProof` RPCs
+- Ensure proper propagation of `api.runtimeVersion` (used for signing) after upgrade
+- Field ordering fix for deprecated `Linkage` (used in linked maps)
+- `derive.account.info` now returns all field enum types decoded (not only raw)
+- Add banner with FAQ entries for node-template to aid with common issues
+- `Digest` has been moved to definitions, removal of `GenericDigest` type
+- Support `Fixed128` type
+- Add `transactionVersion` to `RuntimeVersion` struct
+- Enhance API support for non-subscription providers (skip subscription to runtimeVersion)
+- Adjust types for Kusama 1057 (notably the new `StakingLedger`)
+
+# 1.10.1 Apr 13, 2020
+
+- **Important** Substrate master has updated staking, on older chains apply `StakingLedger: 'StakingLedgerTo240'`
+- Add `rpc.system.chainType` to retrieve the chain type (Development. Local, Live & Custom)
+- Adjust types for Westend after the reset
+- Adjust democracy derives, including the support of the frame-scheduler for scheduled deployments
+- Allow staking derives to work with new staking payouts, specifically `tx.staking.payoutStakers`
+- Cleanups to derives for democracy & staking to be more performant
+- Add Centrifuge base types to `@polkadot/types-known`
+- Adjust with all the latest substrate master types
+- Internally all private/protected methods/variables are now `_` prefixed (Aligning with the `private/protected` indicators in the TS definitions)
+- Update metadata/docs-from-metadata to the latest Substrate
+
+# 1.9.1 Apr 1, 2020
+
+- **Breaking change** (TypeScript with derives only) The return type names for `api.derive.*` have been adjusted for consistency, all starting with `Derive*` (previously a mixture of `Derived*` and `Derive*`)
+- **Breaking change** (derives only) Additional cleanups of democracy proposal & referenda derives, including support for new Polkadot/Substrate vote retrievals
+- Tx signing via `signAndSend` & `signAsync` now tries to use the last finalized block (depending on finalized drift)
+- Add support for `api.rpc.childstate.*` Substrate RPCs, older nodes with still populate `api.rpc.state.*` with the child methods
+- Adjust `Error.message` on RPC failures to not include the (already known) method signature
+- Split `@polkadot/types/known` into `@polkadot/types-known`, allowing for base API overrides
+- Extended `api.derive.democracy` to cater for dispatchQueue and externals
+- Extended `api.derive.council` to cater for new phragmen elections
+- Use new `queryStorageAt` for query `.entries`, removing unneeded subscriptions (use as available)
+- Fix `BTreeSet` initialization when it forms part of query interfaces
+- Fix encoding for `Vec<u8>`-related types as part of constants
+- Internal adjustment of interface type locations (no impact on imports via `@polkadot/types/interfaces`)
+
 # 1.8.1 Mar 22, 2020
 
-- **Breaking change** The format for any custom RPCs have been changed alongside API-internal changes to allow for better RPC management. If you are currently using custom RPCs (or planning to do so), look at the [updated documentation](https://polkadot.js.org/api/start/rpc.custom.html)
+- **Breaking change** The format for any custom RPCs have been changed (alongside API-internal changes) to allow for better RPC management. If you are currently using custom RPCs (or planning to do so), look at the [updated documentation](https://polkadot.js.org/api/start/rpc.custom.html)
 - **Breaking change** Alongside API RPC changes, the `@polkadot/jsonrpc` package has been removed. Since it was never documented and only used internally, this should not have adverse impacts. All RPC definitions itself has now been moved to the relevant modules inside `@polkadot/types/interfaces`
 - **Important** Substrate has an updated democracy module. If using an older chain add the `ReferendumInfo: 'ReferendumInfoTo239'` type when using referendums
 - The `isRetracted` Extrinsic status is now a warning, not a fatal error, correctly aligning with Polkadot/Substrate
@@ -8,6 +125,7 @@
 - Add support for all known substrate RPC methods
 - Extend account derives to include status flags, e.g. `isCouncil`, `isSudo`, ...
 - Adjusted referendum derives to cater for bot new/old democracy. Derived `referendumInfo` now includes `status` field, not `info`
+- Add `initWasm` flag to API options. When set to `false` does not init the WASM portion (leaving it to the user elsewhere)
 
 # 1.7.1 Mar 17, 2020
 

babel.config.js

@@ -1 +1,5 @@
+// Copyright 2017-2020 @polkadot/api authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
 module.exports = require('@polkadot/dev/config/babel');

copy-to-apps.sh

@@ -19,4 +19,5 @@ copy_folder "metadata"
 copy_folder "rpc-core"
 copy_folder "rpc-provider"
 copy_folder "types"
+copy_folder "types-known"
 copy_folder "typegen"

docs/.vuepress/config.js

@@ -20,7 +20,8 @@ module.exports = {
       },
       { text: 'GitHub', link: 'https://github.com/polkadot-js/api' }
     ],
-    search: false,
+    search: true,
+    searchMaxSuggestions: 10,
     sidebar: [
       {
         title: 'Getting started',
@@ -50,6 +51,17 @@ module.exports = {
           ['start/FAQ.md', 'FAQ']
         ]
       },
+      {
+        title: 'Cookbook',
+        path: '/cookbook/',
+        collapsable: false,
+        sidebarDepth: 0,
+        children: [
+          ['cookbook/blocks.md', 'Blocks'],
+          ['cookbook/storage.md', 'Storage'],
+          ['cookbook/tx.md', 'Transactions']
+        ]
+      },
       {
         title: 'Examples (Promise API)',
         path: '/examples/promise/',
@@ -86,5 +98,10 @@ module.exports = {
       ['/types/', '@polkadot/types'],
       '/CONTRIBUTING.md'
     ]
-  }
+  },
+  plugins: [
+    ['@vuepress/search', {
+      searchMaxSuggestions: 10
+    }]
+  ]
 };

docs/.vuepress/styles/palette.styl

@@ -1,5 +1,8 @@
 $accentColor = #fd8824
 $textColor = #2c3e50
+$borderColor = #eaecef
+$codeBgColor = #282c34
+$arrowBgColor = #ccc
 
 .home .hero .description,
 .home .feature h2,

docs/README.md

@@ -13,7 +13,7 @@ features:
 - title: Types
   details: Various type interfaces to make using returned values from API calls transparent in your code.
 
-footer: Apache-2 Licensed | Copyright © 2017-2019 polkadot-js authors and contributors
+footer: Apache-2 Licensed | Copyright © 2017-2020 polkadot-js authors and contributors
 ---
 
 ## Welcome
@@ -21,16 +21,9 @@ footer: Apache-2 Licensed | Copyright © 2017-2019 polkadot-js authors and contr
 The API provides application developers the ability to query a node and interact with the Polkadot or Substrate chains using Javascript. Here you will find documentation and examples to get you started.
 
 ::: tip Getting started & Examples
-[Jump right in](/start/) and get an overview on using the API in your projects, from installation all the way through to making it do magic.  Already understand how things work and just want the examples? [The ApiPromise examples](/examples/promise/) provide some basic recipies.
+[Jump right in](/start/) and get an overview on using the API in your projects, from installation all the way through to making it do magic. Have things working and want tips? The [cookbook](/cookbook/) provides some tips and tricks. Getting started and want some full examples? [The ApiPromise examples](/examples/promise/) provide some basic examples.
 :::
 
-## Available packages
-
-This repository split up into a number of internal packages, namely -
-
-- [api](api/README.md) Promise and RxJS-based APIs
-- [types](types/README.md) Type encoding and decoding wrappers
-
 ## The Polkadot Project
 
 You can read more about the Polkadot Network at [https://polkadot.network/](https://polkadot.network/) and more about the polkadot-js projects at [https://polkadot.js.org](https://polkadot.js.org)

docs/cookbook/README.md

@@ -0,0 +1,19 @@
+# Cookbook
+
+The cookbook hosts small code snippets in a question-answer format. It does not walk you through the whole setup, like the [basic examples](../examples/), but rather aims to answer some questions around specific uses. It also does not replace the [getting started FAQ](../start/FAQ.md), rather this is focussed explicitly on code samples, instead of general trouble-shooting for common mishaps.
+
+These questions are added as they do come up and the hope is that the snippets here is will be useful to others, instead of just the original person who asked on a specific use-case. As of today, it is only making a start and not fully comprehensive yet - check back early, check back often.
+
+## Sections
+
+The following cookbook sections are available -
+
+- [Blocks](blocks.md) - Snippets around working with blocks and headers
+- [Storage](storage.md) - Snippets for working with storage
+- [Transactions](tx.md) - Snippets for working with transactions
+
+... more to come.
+
+## Contribute
+
+And as always, if you have an addition to make, or a question to ask any [any PRs](https://github.com/polkadot-js/api/tree/master/docs) or [issues](https://github.com/polkadot-js/api/issues) are appreciated. The initial content was generate from exactly such questions, either in Riot chat or as submitted as issues.

docs/cookbook/blocks.md

@@ -0,0 +1,44 @@
+# Blocks
+
+The building blocks for each blockchain. As such there are a number of examples for working with blocks and headers, that could be useful.
+
+## How do I retrieve the header/extrinsic hash from blocks?
+
+A block hash refers to the hash over the header, the extrinsic hash refers to the hash of the encoded extrinsic. Since all objects returned by the API implements the `.hash => Hash` getter, we can simply use this to view the actual hash.
+
+```js
+// returns Hash
+const blockHash = await this.api.rpc.chain.getBlockHash(blockNumber);
+// returns SignedBlock
+const signedBlock = await this.api.rpc.chain.getBlock(blockHash);
+
+// the hash for the block, always via header (Hash -> toHex()) - will be
+// the same as blockHash above (also available on any header retrieved,
+// subscription or once-off)
+console.log(signedBlock.header.hash.toHex());
+
+// the hash for each extrinsic in the block
+signedBlock.block.extrinsics.forEach((ex, index) => {
+  console.log(index, ex.hash.toHex());
+});
+```
+
+## How do I extract the block author?
+
+The block author is encoded inside the consensus logs for the block. To extract, you need to decode the log (which the API does do) and then map the index of the validator to the list of session validators. This extraction is however available on the api derive for new head subscriptions, which returns an extended header with the author populated (assuming that the digest logs are known).
+
+```js
+// subscribe to all new headers (with extended info)
+api.derive.chain.subscribeNewHeads((header) => {
+  console.log(`#${header.number}: ${header.author}`);
+});
+```
+
+For a single header only, the derives also contain a `getHeader`, which once again returns a header extended with the author -
+
+```js
+// retrieve the last header (hash optional)
+const header = await api.derive.chain.getHeader();
+
+console.log(`#${header.number}: ${header.author}`);
+```

docs/cookbook/storage.md

@@ -0,0 +1,55 @@
+# Storage
+
+Here you will find snippets for working with storage.
+
+## How do I check for storage existence?
+
+In the metadata, for each storage item a fallback is provided. This means that when an entry does not exist, the fallback (which is the default value for the type) will be provided. This means, that querying for a non-existent key (unless an option), will yield a value -
+
+```js
+// retrieve Option<StakingLedger>
+const ledger = await api.query.staking.ledger('EoukLS2Rzh6dZvMQSkqFy4zGvqeo14ron28Ue3yopVc8e3Q');
+// retrieve ValidatorPrefs (will yield the default value)
+const prefs = await api.query.staking.validators('EoukLS2Rzh6dZvMQSkqFy4zGvqeo14ron28Ue3yopVc8e3Q');
+
+console.log(ledger.isNone, ledger.isSome); // true, false
+console.log(JSON.stringify(prefs.toHuman())); // {"commission":"0"}
+```
+
+In the second case, the non-existent prefs returns the default/fallback value for the storage item. So in this case we don't know if the value is set to 0 or unset. Existence can be checked by using the storage size, which would be zero if nothing is stored.
+
+```js
+// exists
+const sizeY = await api.query.staking.validators.size('DB2mp5nNhbFN86J9hxoAog8JALMhDXgwvWMxrRMLNUFMEY4');
+// non existent
+const sizeN = await api.query.staking.validators.size('EoukLS2Rzh6dZvMQSkqFy4zGvqeo14ron28Ue3yopVc8e3Q');
+
+console.log(sizeY.isZero(), sizeY.toNumber()); // false 4
+console.log(sizeN.isZero(), sizeY.toNumber()); // true 0
+```
+
+## How do I use .entries()/.keys() on double maps?
+
+As [explained elsewhere](../start/api.query.other.md#map-keys-entries) each map-type storage entry exposes the entries/keys helpers to retrieve the whole list. In the case of double maps, with the addition of a single argument, you can retrieve either all entries or a subset based on the first map key.
+
+In both these cases, entries/keys operate the same way, `.entries()` retrieving `(StorageKey, Codec)[]` and `.keys()` retrieving `StorageKey[]`
+
+```js
+// Retrieves the entries for all slashes, in all eras (no arg)
+const allEntries = await api.query.staking.nominatorSlashInEra.entries();
+
+// nominatorSlashInEra(EraIndex, AccountId) for the types of the key args
+allEntries.forEach(([{ args: [era, nominatorId] }, value]) => {
+  console.log(`${era}: ${nominatorId} slashed ${value.toHuman()}`);
+});
+```
+
+While we can retrieve only the keys for a specific era, using a argument for the first part of the doublemap (as defined here, an `EraIndex`) -
+
+```js
+// Retrieves the keys for the slashed validators in era 652
+const slashedKeys = await api.query.staking.nominatorSlashInEra.keys(652);
+
+// key args still contains [EraIndex, AccountId] decoded
+console.log(`slashed: ${slashedKeys.map(({ args: [era, nominatorId] }) => nominatorId)`);
+```

docs/cookbook/tx.md

@@ -0,0 +1,112 @@
+# Transactions
+
+A blockchain is no fun if you are not submitting transactions. Or at least if somebody is not submitting any. Here you will find some snippets for dealing with some common issues.
+
+## How do I estimate the transaction fees?
+
+In addition to the `signAndSend` helper on transactions, `.paymentInfo` (with the exact same parameters) are also exposed. Using the same sender, it applies a dummy signature to the transaction and then gets the fee estimation via RPC.
+
+```js
+// estimate the fees as RuntimeDispatchInfo, using the signer (either
+// address or locked/unlocked keypair) (When overrides are applied, e.g
+//  nonce, the format would be `paymentInfo(sender, { nonce })`)
+const info = await api.tx.balances
+  .transfer(recipient, 123)
+  .paymentInfo(sender);
+
+// log relevant info, partialFee is Balance, estimated for current
+console.log(`
+  class=${class.toString()},
+  weight=${weight.toString()},
+  partialFee=${partialFee.toHuman()}
+`);
+```
+
+## How do I get the decoded enum for an ExtrinsicFailed event?
+
+Assuming you are sending a tx via `.signAndSend`, the callback yields information around the tx pool status as well as any events when `isInBlock` or `isFinalized`. If an extrinsic fails via `system.ExtrinsicFailed` event, you can retrieve the error, if defined as an enum on a module.
+
+```js
+api.tx.balances
+  .transfer(recipient, 123)
+  .signAndSend(sender, ({ status, events }) => {
+    if (status.isInBlock || status.isFinalized) {
+      events
+        // find/filter for failed events
+        .filter(({ section, method }) =>
+          section === 'system' &&
+          method === 'ExtrinsicFailed'
+        )
+        // we know that data for system.ExtrinsicFailed is
+        // (DispatchError, DispatchInfo)
+        .forEach(({ data: [error, info] }) => {
+          if (error.isModule) {
+            // for module errors, we have the section indexed, lookup
+            const decoded = api.registry.findMetaError(error.asModule);
+            const { documentation, method, section } = decoded;
+
+            console.log(`${section}.${method}: ${documentation.join(' ')}`);
+          } else {
+            // Other, CannotLookup, BadOrigin, no extra info
+            console.log(error.toString());
+          }
+        });
+    }
+  });
+```
+
+## How do I send an unsigned extrinsic?
+
+For most runtime modules, transactions need to be signed and validation for this happens node-side. There are however modules that accepts unsigned extrinsics, an example would be the Polkadot/Kusama token claims (which is here used as an example).
+
+```js
+// construct the transaction, exactly as per normal
+const utx = api.tx.claims.claim(beneficiary, ethSignature);
+
+// send it without calling sign, pass callback with status/events
+tx.send(({ status }) => {
+  if (status.isInBlock) {
+    console.log(`included in ${status.asInBlock}`);
+  }
+});
+```
+
+The signing is indicated by the first byte in the transaction, so in this case we have called `.send` on it (no `.sign` or `.signAndSend`), so it will be sent using the unsigned state, without signature attached.
+
+## How can I batch transactions?
+
+Polkadot/Substrate provides a `utility.batch` method that can be used to send a number of transactions at once. These are then executed from a single sender (single nonce specified) in sequence. This is very useful in a number of cases, for instance if you wish to create a payout for a validator for multiple eras, you can use this method. Likewise, you can send a number of transfers at once. Or even batch different types of transactions.
+
+```js
+// construct a list of transactions we want to batch
+const txs = [
+  api.tx.balances.transfer(addrBob, 12345),
+  api.tx.balances.transfer(addrEve, 12345),
+  api.tx.staking.unbond(12345)
+];
+
+// construct the batch and send the transactions
+api.tx.utility
+  .batch(txs)
+  .signAndSend(sender, ({ status }) => {
+    if (status.isInBlock) {
+      console.log(`included in ${status.asInBlock}`);
+    }
+  });
+```
+
+## How do I take the pending tx pool into account in my nonce?
+
+The `system.account` query will always contain the current state, i.e. it will reflect the nonce for the last known block. As such when sending multiple transactions in quick succession (see batching above), there may be transactions in the pool that has the same nonce that `signAndSend` would apply - this call doesn't do any magic, it simply reads the state for the nonce. Since we can specify options to the `signandSend` operation, we can override the nonce, either by manually incrementing it o querying it via `nextNonce`.
+
+```js
+for (let i = 0; i < 10; i++) {
+  // retrieve the nextNonce, taking txs in the pool into account
+  const nonce = await api.rpc.account.nextNonce(sender);
+
+  // send, just retrieving the hash, not waiting on status
+  const txhash = await api.tx.balances
+    .transfer(recipient, 123)
+    .signAndSend(sender, { nonce });
+}
+```

docs/examples/promise/01_simple_connect/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Required imports
 const { ApiPromise, WsProvider } = require('@polkadot/api');
 

docs/examples/promise/02_listen_to_blocks/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/03_listen_to_balance_change/index.js

@@ -1,6 +1,8 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable @typescript-eslint/no-floating-promises */
+
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 
@@ -13,13 +15,13 @@ async function main () {
 
   // Retrieve the initial balance. Since the call has no callback, it is simply a promise
   // that resolves to the current on-chain value
-  let { nonce: previousNonce, data: { free: previousFree } } = await api.query.system.account(Alice);
+  let { data: { free: previousFree }, nonce: previousNonce } = await api.query.system.account(Alice);
 
   console.log(`${Alice} has a balance of ${previousFree}, nonce ${previousNonce}`);
   console.log(`You may leave this example running and start example 06 or transfer any value to ${Alice}`);
 
   // Here we subscribe to any balance changes and update the on-screen value
-  api.query.system.account(Alice, ({ nonce: currentNonce, data: { free: currentFree } }) => {
+  api.query.system.account(Alice, ({ data: { free: currentFree }, nonce: currentNonce }) => {
     // Calculate the delta
     const change = currentFree.sub(previousFree);
 

docs/examples/promise/03_listen_to_multiple_balances_change/index.js

@@ -1,6 +1,8 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable @typescript-eslint/no-floating-promises */
+
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/04_unsubscribe/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/05_read_storage/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/05_read_storage_at/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/06_make_transfer/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API, Keyring and some utility functions
 const { ApiPromise } = require('@polkadot/api');
 const { Keyring } = require('@polkadot/keyring');

docs/examples/promise/07_make_transfer_with_allowed_block_permissions_only/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API, Keyring and some utility functions
 const { ApiPromise } = require('@polkadot/api');
 const { Keyring } = require('@polkadot/keyring');

docs/examples/promise/08_system_events/index.js

@@ -1,6 +1,8 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable @typescript-eslint/no-floating-promises */
+
 // Import the API
 const { ApiPromise } = require('@polkadot/api');
 

docs/examples/promise/09_transfer_events/index.js

@@ -1,6 +1,8 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
-/* eslint-disable @typescript-eslint/unbound-method */
 /* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable @typescript-eslint/no-floating-promises */
+
 // Import the API & Provider and some utility functions
 const { ApiPromise } = require('@polkadot/api');
 
@@ -44,7 +46,7 @@ async function main () {
         console.log('Included at block hash', status.asInBlock.toHex());
         console.log('Events:');
 
-        events.forEach(({ phase, event: { data, method, section } }) => {
+        events.forEach(({ event: { data, method, section }, phase }) => {
           console.log('\t', phase.toString(), `: ${section}.${method}`, data.toString());
         });
       } else if (status.isFinalized) {

docs/examples/promise/10_upgrade_chain/index.js

@@ -1,6 +1,8 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable @typescript-eslint/no-floating-promises */
+
 // Import the API & Provider and some utility functions
 const { ApiPromise, WsProvider } = require('@polkadot/api');
 

docs/examples/rx/01_simple_connect/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Required imports
 const { zip } = require('rxjs');
 const { ApiRx } = require('@polkadot/api');

docs/examples/rx/02_listen_to_blocks/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API
 const { ApiRx } = require('@polkadot/api');
 const { switchMap } = require('rxjs/operators');

docs/examples/rx/03_listen_to_balance_change/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API and operators from RxJs
 const { ApiRx } = require('@polkadot/api');
 const { pairwise, startWith } = require('rxjs/operators');
@@ -27,6 +28,7 @@ async function main () {
         // then balance[1] is the initial value of Alice account.
         console.log(`Alice ${Alice} has a balance of ${balance[1].data.free}`);
         console.log('You may leave this example running and start the "Make a transfer" example or transfer any value to Alice address');
+
         return;
       }
 

docs/examples/rx/04_unsubscribe/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API
 const { ApiRx } = require('@polkadot/api');
 const { switchMap } = require('rxjs/operators');

docs/examples/rx/05_read_storage/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API
 const { ApiRx } = require('@polkadot/api');
 const { combineLatest, of } = require('rxjs');

docs/examples/rx/06_make_transfer/index.js

@@ -1,6 +1,8 @@
+
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API, Keyring and some utility functions
 const { ApiRx } = require('@polkadot/api');
 const { Keyring } = require('@polkadot/keyring');

docs/examples/rx/08_system_events/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API and selected RxJs operators
 const { switchMap } = require('rxjs/operators');
 const { ApiRx } = require('@polkadot/api');

docs/examples/rx/09_transfer_events/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API and some utility functions
 const { ApiRx } = require('@polkadot/api');
 
@@ -48,7 +49,7 @@ async function main () {
         console.log('Included at block hash', status.asInBlock.toHex());
         console.log('Events:');
 
-        events.forEach(({ phase, event: { data, method, section } }) => {
+        events.forEach(({ event: { data, method, section }, phase }) => {
           console.log('\t', phase.toString(), `: ${section}.${method}`, data.toString());
         });
       } else if (status.isFinalized) {

docs/examples/rx/10_upgrade_chain/index.js

@@ -1,6 +1,7 @@
+/* eslint-disable header/header */
 /* eslint-disable @typescript-eslint/require-await */
 /* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-var-requires */
+
 // Import the API & Provider and some utility functions
 const { ApiRx, WsProvider } = require('@polkadot/api');
 // Import the test keyring (already has dev keys for Alice, Bob, Charlie, Eve & Ferdie)

docs/start/FAQ.md

@@ -40,7 +40,7 @@ Tuples, as defined in the Polkadot/Substrate types appear as `(TypeA, TypeB)`. F
 
 Polkadot/Substrate supports both immortal and mortal transactions. For immortal, this means that the transaction has an infinite lifetime, for mortals, the transactions expire after a defined period. By default the API sends mortal transactions when no explicit extrinsic era has been specified. This means that all transaction has a limited lifetime and will expire if not included in the period set.
 
-The length for this transaction validity is set to 50 blocks, which translates to 5 minutes assuming a default of 6 second blocktimes. (10 blocks per minute in this default configuration).
+The length for this transaction validity is set to 5 minutes, calculated based on the blocktime for the chain. (10 blocks per minute in this default 6s Substrate configuration).
 
 ## My chain does not support system.account queries
 
@@ -49,3 +49,30 @@ The API always tracks the latest Substrate master in terms of examples. This mea
 It is possible that you are connecting to an older chain that has not been upgraded yet. For these chains, this storage entry won't be available (yet). To query the nonce on older chains, you can do a query to `api.query.system.accountNonce(<account>)` and balances can be retrieved via `api.query.balances.freeBalance(<account>)`.
 
 Likewise, if your chain has been upgraded recently and you are still using the old `system.accountNonce` or `balances.freeBalance` queries in your code (which is now not available in the chain metadata), you need to update it to query the new location.
+
+## I cannot send transactions from my node-template-based chain
+
+The API always injects the default type definitions as specified by the Substrate master fully-featured node. This means that any customizations to chains needs needs to be applied as types, should there be differences in specific user-implementations.
+
+The Substrate node-template has added customizations for some types in the default template, specifically around the `Address` and `Lookup` types, removing any lookups based on indices. This means that the transaction payload saves 2 bytes for a transfer and is an approach followed by other chains as well, notably Polkadot & Kusama.
+
+Due to these customizations and differences that bleed through to the transaction formats, out-of-the-box chains based on the node-template will have issues when sending transactions. To fix this, you would need to add [the customized Address types into your API](types.extend.md#impact-on-extrinsics) instances (or UIs), allowing the API to have the information required to adjust the encoding.
+
+## Using a non-current-master node, I have issues parsing events
+
+Recently Substrate master updated the `Weight` type from `u32` -> `u64`. This type is used in the `DispatchInfo` struct in the `system.ExtrinsicSuccess` events, to return the applied call weights as well as the resulting fees. Since the API master branch tracks Substrate master, this means the change has been applied by default, with the default set to `u64`.
+
+If you are on a chain that has not been upgraded yet, you need to add `Weight: 'u32'` to your types to allow for successful parsing of all events. Without this override, parsing will fail. As soon as one event in the `Vec<EventRecord>` structure from `system.events` fails to parse, all subsequent events are affected and the decoding will return an error.
+
+## When querying older blocks & events, it fails on parsing
+
+Upon initialization, the API is decorated with the [current on-chain metadata](basics.md#metadata) and (if [available](https://github.com/polkadot-js/api/tree/master/packages/types-known/src)) the specific types for the runtime version is added. This allows the API to decode all current (as per the on-chain info) state and extrinsics.
+
+When the chain is upgraded, new metadata (indicating new events, storage and extrinsics) is added on-chain. Additionally this generally goes hand in-hand with changes in types, i.e. fields may be addedd or removed or state that was used could now be migrated to new locations. In most cases, this would mean that the current chain information cannot be used to parse older entries pre-upgrade. A typical consequence of this is that any `.at(...)` or `.range(...)` queries pre-upgrade may fail.
+
+As of the current time, there is no automatic injection of older metadata (based on the runtime version at a specific block) nor decoration of older types if they are available. It can be emulated with what the API will do to handle these cases when it adds a `.historic(...)` query type -
+
+- querying the runtime version at the parent of older block you wish to retrieve
+- retrieving and injecting the metadata from the parent block (if the runtime version has changed)
+- inject any specific older types for the state at that point
+- finally retrieve the actual entry via an `.at(...)` query

docs/start/api.query.multi.md

@@ -23,7 +23,7 @@ A couple of items to note in the example above: we don't call `account` directly
 ...
 
 // Retrieve a snapshot of the validators
-const validators = await api.query.session.validators();
+const validatorKeys = await api.query.session.validators.keys();
 
 // Subscribe to the balances for these accounts
 const unsub = await api.query.balances.account.multi(validators, (balances) => {

docs/start/api.query.other.md

@@ -62,7 +62,7 @@ When working maps and double-maps, it is possible to retrieve a list of all the
 // Retrieve the active era
 const activeEra = await api.query.staking.activeEra();
 
-// retrieve all exposures int the active era
+// retrieve all exposures for the active era
 const exposures = await api.query.staking.erasStakers.entries(activeEra.index);
 
 exposures.forEach(([key, exposure]) => {
@@ -71,9 +71,24 @@ exposures.forEach(([key, exposure]) => {
 });
 ```
 
-Here we are querying a double-map, so we supply 1 argument. No arguments on double-maps will be very costly, retrieving all the eras and associated entries. Additionally when `twox64_concat` & `blake2_concat` is used, the key `.args` will contain decoded values of the params, in this case it will contain the actual `AccountId` of the staker. (Since that was not supplied)
+To understand the usage of the `key.args`, you need to understand that map/doublemap keys are stored alongside their lookups. This means that the raw key has hashed parts as well as the raw data. The API will decode the keys and provide the raw key arguments in args. This would mean -
 
-In the same way as above we can simply do `.keys(activeEra.index): StorageKey[]` to retrieve all the keys here, including the individual keys args decoding, as available on maps with decodable hashing functions.
+- if we are querying `api.query.staking.validators(validatorId: AccountId)` via `entries`, the `key.args` would be `[AccountId]`
+- if we are querying `api.query.staking.erasStakers(era: EraIndex, validatorId: AccountId)` via `entries`, the `key.args` would be `[EraIndex, AccountId]`
+
+the same applies to `.keys()` - here the list of keys also have the decoded args, as specified. You can think of `.args` as a tuple with the same types as the types required to retrieve a single entry in the map.
+
+In the first example we are querying a double-map, so we supply 1 argument. No arguments on double-maps will be very costly, retrieving all the eras and associated entries. In the same way as above we can simply do `.keys(activeEra.index): StorageKey[]` to retrieve all the keys here, including the individual keys args (available on maps with decodable hashing functions) -
+
+```js
+// retrieve all the nominator keys
+const keys = await api.query.staking.nominators.keys();
+
+// extract the first key argument [AccountId] as string
+const nominatorIds = keys.map(({ args: [nominatorId] }) => nominatorId);
+
+console.log('all nominators:', nominatorIds.join(', '));
+```
 
 ## State entries
 

docs/start/api.query.subs.md

@@ -26,7 +26,7 @@ If we had a query with parameters, i.e. where we wish to perform a query for a s
 
 // Subscribe to balance changes for our account
 const unsub = await api.query.system.account(ADDR, ({ nonce, data: balance }) => {
-  console.log(`free balance is ${balance.freee} with ${balance.reserved} reserved and a nonce of ${nonce}`);
+  console.log(`free balance is ${balance.free} with ${balance.reserved} reserved and a nonce of ${nonce}`);
 });
 ```
 

docs/start/rpc.custom.md

@@ -1,6 +1,6 @@
 # Custom RPC
 
-In previous sections we looked at the injection of types, as in use and defined in modules from the node. Another area that can be customized is RC definitions, and like with the types, the API provides the capability to add user-defined RPCs (in addition to the Polkadot/Substrate base) to allow use of these RPCs via the API.
+In previous sections we looked at the injection of types, as in use and defined in modules from the node. Another area that can be customized is RPC definitions, and like with the types, the API provides the capability to add user-defined RPCs (in addition to the Polkadot/Substrate base) to allow use of these RPCs via the API.
 
 ## Custom definitions
 
@@ -17,16 +17,28 @@ const api = await ApiPromise.create({
           {
             name: 'index',
             type: 'u64'
+          },
+          {
+            name: 'at',
+            type: 'Hash',
+            isOptional: true
           }
         ],
         type: 'Balance'
-      }
-    }
-  }
+      },
+      anotherMethod: { ... },
+      ...
+    },
+    anotherModule: { ... },
+    ...
+  },
+  ...
 });
 ```
 
-In the above example we have defined a new method, which is now available on the RPCs as `api.rpc.firstModule.testMethod(u64) => Promise<Balance>`. Do be aware that while defined, the method will only appear if it is in the list as returned by `api.rpc.rpc.methods()`, which is the list of known RPCs the node exposes. When making changes to the node, always ensure that it does expose the RPC method correctly, otherwise it will not be decorated.
+In the above example we have defined a new method, which is now available on the RPCs as `api.rpc.firstModule.testMethod(index: u64, at?: Hash) => Promise<Balance>`. In the case of optional params, we have added the `isOptional: true` flag alongside the `name` & `type` in the param definition.
+
+Be aware that while defined, the method will only appear on the API if it is in the list as returned by `api.rpc.rpc.methods()`, which is the list of known RPCs the node exposes. When making changes to the node, always ensure that it does expose the RPC method correctly, otherwise it will not be decorated.
 
 ## Definition breakdown
 

docs/start/types.basics.md

@@ -57,7 +57,7 @@ Be aware that in the JS version naming defaults to `camelCase` where names of fi
 
 Each enum has additional getters which are injected based on the fields wrapped. These take the form of `.is<Name>` and `.as<Name>` to allow you to check is the enum is a certain value or to retrieve the underlying value as a specific type.
 
-As a real-world example, when an extrinsic is applied, the `Phase` enum has one of two states, `ApplyExtrinsic(u32)` or `Finalization`. In this case `.isApplyExtrinsic` would be `true` when an extrinsic is being applied, and `.asApplyExtrinsic` would return the value as a `u32` (which is the index of the extrinsic in the block, as it is being applied). When `isisApplyExtrinsic` is `false` and `asApplyExtrinsic` is called, the getter will throw.
+As a real-world example, when an extrinsic is applied, the `Phase` enum has one of two states, `ApplyExtrinsic(u32)` or `Finalization`. In this case `.isApplyExtrinsic` would be `true` when an extrinsic is being applied, and `.asApplyExtrinsic` would return the value as a `u32` (which is the index of the extrinsic in the block, as it is being applied). When `isApplyExtrinsic` is `false` and `asApplyExtrinsic` is called, the getter will throw.
 
 ## Working with Option&lt;Type&gt;
 
@@ -67,6 +67,7 @@ An `Option<Type>` attempts to mimic the Rust approach of having `None` and `Some
 - `.isSome` - this is `true` is a value is wrapped, i.e. if a `Option<u32>` has an actual underlying `u32`
 - `.unwrap()` - when `isSome`, this will return the wrapped value, i.e. for `Option<u32>`, this would return the `u32`. When the value is `isNone`, this call will throw an exception.
 - `.unwrapOr(<default value>)` - this extends `unwrap()`, returning the wrapped value when `isSome` and in the case of `isNone` it will return the `<default value>` passed.
+- `.unwrapOrDefault()` - returns either the rapped value when `isSome`, or the default for the type when `isNone`
 
 ## Working with Tuples
 

docs/start/types.extend.md

@@ -26,6 +26,15 @@ const api = await ApiPromise.create({
 
 The above introduces the `types` registry, effectively allowing overrides and the definition of new types. The override above would mean that immediately the API will treat all occurrences of `Balance` not as the default, but rather as the defined size.
 
+## Field ordering
+
+When defining any custom structures or types, it is critical that the following rules are applied -
+
+- Map exactly to what is defined in the Rust code, i.e. defining a `SaleType` cannot be `u16` on the one end and `u32` on the other end. If mismatches occur, the serialization will fail.
+- Ensure that the field order is maintained in all definitions. The SCALE serialization is binary and contains no field names in the serialization, only the encoded values. Any decoding is therefore done based on the size of the type and the order thereof in the definitions.
+
+These rules apply everywhere. Always ensure that the types match exactly between the environments and that the ordering is maintained, be it for structs, tuples or enums.
+
 ## User-defined structs
 
 Registration also applies to any type that can be found on a specific chain, i.e. we can add any types that is available on a specific node -

docs/start/typescript.user.md

@@ -4,7 +4,7 @@ In the previous section we looked at the TypeScript definitions that are availab
 
 ## Definitions
 
-A large part of the type definitions are defined not as classes, but rather as structures from which type definitions are extracted and that can be used as-is to let the API know how to decode a type. By now you should be familiar with [type extensions](types.extend.md), but effectively the [types library does exactly the same](https://github.com/polkadot-js/api/tree/master/packages/types/src/interfaces).
+A large part of the type definitions are defined not as classes, but rather as structures from which type definitions are extracted and that can be used as-is to let the API know how to decode a type. By now you should be familiar with [type extensions](types.extend.md) and the [rules around fields](types.extend.md#field-ordering), but effectively the [types library does exactly the same](https://github.com/polkadot-js/api/tree/master/packages/types/src/interfaces).
 
 To create TypeScript-aware definitions and keep your files in a single place, you can follow the same approach. Assuming you have a package named `@MeInc/stuff` where you have the definitions in an `stuff/interfaces` folder. Each sub-folder would indicate a runtime module, e.g.
 

jest.config.js

@@ -1,14 +1,19 @@
-/* eslint-disable @typescript-eslint/camelcase */
-/* eslint-disable @typescript-eslint/no-var-requires */
+// Copyright 2017-2020 @polkadot/api authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
 const config = require('@polkadot/dev/config/jest');
 
 module.exports = Object.assign({}, config, {
   moduleNameMapper: {
     '@polkadot/api-contract(.*)$': '<rootDir>/packages/api-contract/src/$1',
     '@polkadot/api-derive(.*)$': '<rootDir>/packages/api-derive/src/$1',
+    // eslint-disable-next-line sort-keys
     '@polkadot/api(.*)$': '<rootDir>/packages/api/src/$1',
     '@polkadot/metadata(.*)$': '<rootDir>/packages/metadata/src/$1',
     '@polkadot/rpc-(core|provider)(.*)$': '<rootDir>/packages/rpc-$1/src/$2',
+    '@polkadot/types-known(.*)$': '<rootDir>/packages/types-known/src/$1',
+    // eslint-disable-next-line sort-keys
     '@polkadot/types(.*)$': '<rootDir>/packages/types/src/$1'
   },
   modulePathIgnorePatterns: [
@@ -18,7 +23,8 @@ module.exports = Object.assign({}, config, {
     '<rootDir>/packages/metadata/build',
     '<rootDir>/packages/rpc-core/build',
     '<rootDir>/packages/rpc-provider/build',
-    '<rootDir>/packages/types/build'
+    '<rootDir>/packages/types/build',
+    '<rootDir>/packages/types-known/build'
   ],
   resolver: './jest.resolver.js'
 });

jest.resolver.js

@@ -1,8 +1,7 @@
-// Copyright 2017-2020 @polkadot/util authors & contributors
+// Copyright 2017-2020 @polkadot/api authors & contributors
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-// eslint-disable-next-line @typescript-eslint/no-var-requires
 const path = require('path');
 
 module.exports = function resolver (file, config) {

lerna.json

@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "1.8.1"
+  "version": "1.16.1"
 }

package.json

@@ -7,7 +7,7 @@
     "packages/*"
   ],
   "resolutions": {
-    "typescript": "^3.8.3"
+    "babel-core": "^7.0.0-bridge.0"
   },
   "scripts": {
     "build": "yarn build:interfaces && polkadot-dev-build-ts && (cd packages/typegen && copyfiles scripts/* build)",
@@ -24,13 +24,14 @@
     "test:watch": "polkadot-dev-run-test --watch"
   },
   "devDependencies": {
-    "@babel/core": "^7.9.0",
+    "@babel/core": "^7.9.6",
     "@babel/register": "^7.9.0",
-    "@babel/runtime": "^7.9.2",
-    "@polkadot/dev": "^0.51.7",
-    "@polkadot/ts": "^0.3.14",
+    "@babel/runtime": "^7.9.6",
+    "@polkadot/dev": "^0.54.1",
+    "@polkadot/ts": "^0.3.23",
     "@polkadot/typegen": "workspace:packages/typegen",
-    "@types/jest": "^25.1.4",
+    "@types/jest": "^25.2.3",
+    "@vuepress/plugin-search": "^1.5.0",
     "copyfiles": "^2.2.0"
   }
 }

packages/api-contract/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "1.8.1",
+  "version": "1.16.1",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
   "keywords": [
@@ -26,12 +26,12 @@
   },
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
-    "@babel/runtime": "^7.9.2",
-    "@polkadot/api": "1.8.1",
-    "@polkadot/rpc-core": "1.8.1",
-    "@polkadot/types": "1.8.1",
-    "@polkadot/util": "^2.6.2",
-    "bn.js": "^5.1.1",
-    "rxjs": "^6.5.4"
+    "@babel/runtime": "^7.9.6",
+    "@polkadot/api": "1.16.1",
+    "@polkadot/rpc-core": "1.16.1",
+    "@polkadot/types": "1.16.1",
+    "@polkadot/util": "^2.11.1",
+    "bn.js": "^5.1.2",
+    "rxjs": "^6.5.5"
   }
 }

packages/api-contract/src/Abi.ts

@@ -18,10 +18,10 @@ export default class ContractAbi extends ContractRegistry implements InterfaceAb
 
   constructor (registry: Registry, abi: ContractABIPre) {
     super(registry, abi);
-    [this.abi, this.constructors, this.messages] = this.decodeAbi(abi);
+    [this.abi, this.constructors, this.messages] = this._decodeAbi(abi);
   }
 
-  private decodeAbi (abiPre: ContractABIPre): [ContractABI, ContractABIFn[], AbiMessages] {
+  private _decodeAbi (abiPre: ContractABIPre): [ContractABI, ContractABIFn[], AbiMessages] {
     this.validateAbi(abiPre);
 
     const abi = this.convertAbi(abiPre);

packages/api-contract/src/ContractRegistry.ts

@@ -19,7 +19,7 @@ function parseSelector (registry: Registry, fnname: string, input: ContractABIMe
     return registry.createType('u32', hexToU8a(input));
   } else if (typeof input === 'string') {
     try {
-      const array = JSON.parse(input);
+      const array = JSON.parse(input) as unknown[];
 
       assert(array.length === 4, `${fnname}: Invalid selector length`);
 
@@ -61,7 +61,7 @@ export default class ContractRegistry extends MetaRegistry {
       const unknownKeys = Object.keys(arg).filter((key): boolean => !['name', 'type'].includes(key));
 
       assert(unknownKeys.length === 0, `Unknown keys ${unknownKeys.join(', ')} found in ABI args for ${name}`);
-      assert(isNumber(arg.name) && isString(this.stringAt(arg.name)), `${name} args should have valid name `);
+      assert(isNumber(arg.name) && isString(this._stringAt(arg.name)), `${name} args should have valid name `);
       assert(isNumber(arg.type.ty) && isObject(this.typeDefAt(arg.type.ty)), `${name} args should have valid type`);
     });
   }
@@ -83,9 +83,9 @@ export default class ContractRegistry extends MetaRegistry {
 
       assert(unknownKeys.length === 0, `Unknown keys ${unknownKeys.join(', ')} found in ABI args for messages.${message.name}`);
 
-      const { name, selector, return_type: returnType } = message;
+      const { name, return_type: returnType, selector } = message;
 
-      assert(isNumber(name) && isString(this.stringAt(name)), `Expected name for ${fnname}`);
+      assert(isNumber(name) && isString(this._stringAt(name)), `Expected name for ${fnname}`);
       assert(isNull(returnType) || (isNumber(returnType.ty) && isObject(this.typeDefAt(returnType.ty))), `Expected return_type for ${fnname}`);
 
       parseSelector(this.registry, fnname, selector);
@@ -100,7 +100,7 @@ export default class ContractRegistry extends MetaRegistry {
 
     const { contract: { constructors, messages, name } } = abi;
 
-    assert(constructors && messages && isString(this.stringAt(name)), 'ABI should have constructors, messages & name sections');
+    assert(constructors && messages && isString(this._stringAt(name)), 'ABI should have constructors, messages & name sections');
 
     this.validateConstructors(abi);
     this.validateMessages(abi);
@@ -108,14 +108,17 @@ export default class ContractRegistry extends MetaRegistry {
 
   public createMessage (name: string, message: Partial<ContractABIMessage> & ContractABIMessageBase): ContractABIFn {
     const args = message.args.map(({ name, type }): ContractABIFnArg => {
-      assert(isObject(type), `Invalid type at index ${type}`);
+      assert(isObject(type), `Invalid type at index ${type.toString()}`);
+
       return {
         name: stringCamelCase(name),
         type
       };
     });
+
     const Clazz = createArgClass(this.registry, args, isUndefined(message.selector) ? {} : { __selector: 'u32' });
     const baseStruct: { [index: string]: any } = { __selector: isUndefined(message.selector) ? undefined : parseSelector(this.registry, name, message.selector) };
+
     const encoder = (...params: CodecArg[]): Uint8Array => {
       assert(params.length === args.length, `Expected ${args.length} arguments to contract ${name}, found ${params.length}`);
 
@@ -136,6 +139,7 @@ export default class ContractRegistry extends MetaRegistry {
     fn.args = args;
     fn.isConstant = !(message.mutates || false);
     fn.type = message.returnType || null;
+
     return fn;
   }
 
@@ -147,19 +151,20 @@ export default class ContractRegistry extends MetaRegistry {
   }
 
   public convertArgs (args: ContractABIArgBasePre[]): any[] {
-    return args.map(({ name, type, ...arg }) => ({ ...arg, name: this.stringAt(name), type: this.convertType(type) }));
+    return args.map(({ name, type, ...arg }) => ({ ...arg, name: this._stringAt(name), type: this.convertType(type) }));
   }
 
-  public convertType ({ ty, display_name: displayNameIndices }: ContractABITypePre): TypeDef {
+  public convertType ({ display_name: displayNameIndices, ty }: ContractABITypePre): TypeDef {
     const displayName = this.stringsAt(displayNameIndices).join('::');
+
     return this.typeDefAt(ty, { displayName });
   }
 
-  public convertContract ({ constructors, messages, name, events, ...contract }: ContractABIContractPre): ContractABIContract {
+  public convertContract ({ constructors, events, messages, name, ...contract }: ContractABIContractPre): ContractABIContract {
     return {
       constructors: this.convertConstructors(constructors),
       messages: messages.map((message) => this.convertMessage(message)),
-      name: this.stringAt(name),
+      name: this._stringAt(name),
       ...(events
         ? { events: events.map((event) => this.convertEvent(event)) }
         : {}),
@@ -178,14 +183,16 @@ export default class ContractRegistry extends MetaRegistry {
   public convertMessage ({ args, name, return_type: returnType, ...message }: ContractABIMessagePre): ContractABIMessage {
     return {
       ...message,
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
       args: this.convertArgs(args),
-      name: this.stringAt(name),
+      name: this._stringAt(name),
       returnType: returnType ? this.convertType(returnType) : null
     };
   }
 
   public convertEvent ({ args }: ContractABIEventPre): ContractABIEvent {
     return {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
       args: this.convertArgs(args)
     };
   }
@@ -202,13 +209,13 @@ export default class ContractRegistry extends MetaRegistry {
     }
   }
 
-  public convertStorageStruct ({ 'struct.type': structType, 'struct.fields': structFields }: ContractABIStorageStructPre): ContractABIStorageStruct {
+  public convertStorageStruct ({ 'struct.fields': structFields, 'struct.type': structType }: ContractABIStorageStructPre): ContractABIStorageStruct {
     return {
-      'struct.type': this.typeDefAt(structType),
-      'struct.fields': structFields.map(({ name, layout }) => ({
-        name: this.stringAt(name),
-        layout: this.convertStorageLayout(layout)
-      }))
+      'struct.fields': structFields.map(({ layout, name }) => ({
+        layout: this.convertStorageLayout(layout),
+        name: this._stringAt(name)
+      })),
+      'struct.type': this.typeDefAt(structType)
     };
   }
 

packages/api-contract/src/MetaRegistry.ts

@@ -7,11 +7,11 @@ import { MetaRegistryItem, MetaRegistryJson, MetaTypeDefClikeEnum, MetaType, Met
 import { assert } from '@polkadot/util';
 import { displayType, withTypeString } from '@polkadot/types';
 
-const builtinMap: [(id: any) => boolean, MetaTypeInfo][] = [
-  [(id: any): boolean => typeof id === 'string', MetaTypeInfo.BuiltinPlain],
-  [(id: any): boolean => Array.isArray(id), MetaTypeInfo.BuiltinTuple],
-  [(id: any): boolean => !!(id['array.type']), MetaTypeInfo.BuiltinVecFixed],
-  [(id: any): boolean => !!(id['slice.type']), MetaTypeInfo.BuiltinVec]
+const builtinMap: [(id: unknown | unknown[] | { 'array.type': unknown } | { 'slice.type': unknown }) => boolean, MetaTypeInfo][] = [
+  [(id: any) => typeof id === 'string', MetaTypeInfo.BuiltinPlain],
+  [(id: any) => Array.isArray(id), MetaTypeInfo.BuiltinTuple],
+  [(id: any) => !!((id as { 'array.type': unknown })['array.type']), MetaTypeInfo.BuiltinVecFixed],
+  [(id: any) => !!((id as { 'slice.type': unknown })['slice.type']), MetaTypeInfo.BuiltinVec]
 ];
 
 const typeMap: [string, MetaTypeInfo][] = [
@@ -25,8 +25,8 @@ function detectedType ({ def, id }: MetaType): MetaTypeInfo {
   assert(!(def as MetaTypeDefUnion)['union.fields'], 'Invalid union type definition found');
 
   const lookup = def === 'builtin'
-    ? builtinMap.find(([test]): boolean => test(id))
-    : typeMap.find(([test]): boolean => !!(def as any)[test]);
+    ? builtinMap.find(([test]) => test(id))
+    : typeMap.find(([test]) => !!(def as unknown as Record<string, unknown>)[test]);
 
   return lookup
     ? lookup[1]
@@ -48,7 +48,7 @@ class MetadataRegistryLookup {
     this._types = types;
   }
 
-  protected hasItemAt (index: number, variant: MetaRegistryItem): boolean {
+  protected _hasItemAt (index: number, variant: MetaRegistryItem): boolean {
     switch (variant) {
       case MetaRegistryItem.String:
         return this._strings && !!this._strings[index - 1];
@@ -59,8 +59,8 @@ class MetadataRegistryLookup {
     }
   }
 
-  protected itemAt (index: number, variant: MetaRegistryItem): any {
-    assert(this.hasItemAt(index, variant), `MetaRegistry: Invalid ${variant} index ${index} found in metadata`);
+  protected _itemAt (index: number, variant: MetaRegistryItem): string | MetaType | TypeDef {
+    assert(this._hasItemAt(index, variant), `MetaRegistry: Invalid ${variant} index ${index} found in metadata`);
 
     switch (variant) {
       case MetaRegistryItem.String:
@@ -72,33 +72,33 @@ class MetadataRegistryLookup {
     }
   }
 
-  protected itemsAt (indices: number[], variant: MetaRegistryItem): any[] {
-    return indices.map((index: number): string => this.itemAt(index, variant));
+  protected _itemsAt (indices: number[], variant: MetaRegistryItem): (string | MetaType | TypeDef)[] {
+    return indices.map((index: number) => this._itemAt(index, variant));
   }
 
-  protected stringAt (index: StringIndex): string {
-    return this.itemAt(index, MetaRegistryItem.String);
+  protected _stringAt (index: StringIndex): string {
+    return this._itemAt(index, MetaRegistryItem.String) as string;
   }
 
   public stringsAt (indices: StringIndex[]): string[] {
-    return this.itemsAt(indices, MetaRegistryItem.String);
+    return this._itemsAt(indices, MetaRegistryItem.String) as string[];
   }
 
   public typeAt (index: TypeIndex): MetaType {
-    return this.itemAt(index, MetaRegistryItem.Type);
+    return this._itemAt(index, MetaRegistryItem.Type) as MetaType;
   }
 
   public typesAt (indices: TypeIndex[]): MetaType[] {
-    return this.itemsAt(indices, MetaRegistryItem.Type);
+    return this._itemsAt(indices, MetaRegistryItem.Type) as MetaType[];
   }
 
   public hasTypeDefAt (index: TypeIndex): boolean {
-    return this.hasItemAt(index, MetaRegistryItem.TypeDef);
+    return this._hasItemAt(index, MetaRegistryItem.TypeDef);
   }
 
   public typeDefAt (index: TypeIndex, extra: Pick<TypeDef, never> = {}): TypeDef {
     return {
-      ...this.itemAt(index, MetaRegistryItem.TypeDef),
+      ...this._itemAt(index, MetaRegistryItem.TypeDef) as TypeDef,
       ...extra
     };
   }
@@ -116,7 +116,7 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     this.typeDefs[typeIndex - 1] = this.typeDefFromMetaType(this.typeAt(typeIndex), typeIndex);
   }
 
-  private typeDefIdFields ({ id }: MetaType): Pick<TypeDef, never> {
+  private _typeDefIdFields ({ id }: MetaType): Pick<TypeDef, never> {
     const { 'custom.name': nameIndex, 'custom.namespace': namespaceIndices, 'custom.params': paramsIndices } = id as MetaTypeIdCustom;
 
     if (!nameIndex) {
@@ -124,7 +124,7 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     }
 
     return {
-      name: this.stringAt(nameIndex),
+      name: this._stringAt(nameIndex),
       ...(namespaceIndices && namespaceIndices.length
         ? { namespace: this.stringsAt(namespaceIndices).join('::') }
         : {}
@@ -136,33 +136,33 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     };
   }
 
-  private typeDefDefFields (metaType: MetaType, typeIndex?: TypeIndex): Pick<TypeDef, never> {
+  private _typeDefDefFields (metaType: MetaType, typeIndex: TypeIndex = -1): Pick<TypeDef, never> {
     let typeDef;
 
     switch (detectedType(metaType)) {
       case MetaTypeInfo.BuiltinPlain:
-        typeDef = this.typeDefForBuiltinPlain(metaType.id as string);
+        typeDef = this._typeDefForBuiltinPlain(metaType.id as string);
         break;
       case MetaTypeInfo.BuiltinTuple:
-        typeDef = this.typeDefForBuiltinTuple(metaType.id as TypeIndex[]);
+        typeDef = this._typeDefForBuiltinTuple(metaType.id as TypeIndex[]);
         break;
       case MetaTypeInfo.BuiltinVec:
-        typeDef = this.typeDefForBuiltinVec(metaType.id as MetaTypeIdVec, typeIndex);
+        typeDef = this._typeDefForBuiltinVec(metaType.id as MetaTypeIdVec, typeIndex);
         break;
       case MetaTypeInfo.BuiltinVecFixed:
-        typeDef = this.typeDefForBuiltinVecFixed(metaType.id as MetaTypeIdVecFixed, typeIndex);
+        typeDef = this._typeDefForBuiltinVecFixed(metaType.id as MetaTypeIdVecFixed, typeIndex);
         break;
       case MetaTypeInfo.Enum:
-        typeDef = this.typeDefForEnum(metaType.def as MetaTypeDefEnum, metaType.id as MetaTypeIdCustom, typeIndex);
+        typeDef = this._typeDefForEnum(metaType.def as MetaTypeDefEnum, metaType.id as MetaTypeIdCustom, typeIndex);
         break;
       case MetaTypeInfo.ClikeEnum:
-        typeDef = this.typeDefForClikeEnum(metaType.def as MetaTypeDefClikeEnum);
+        typeDef = this._typeDefForClikeEnum(metaType.def as MetaTypeDefClikeEnum);
         break;
       case MetaTypeInfo.Struct:
         typeDef = this.typeDefForStruct(metaType.def as MetaTypeDefStruct);
         break;
       case MetaTypeInfo.TupleStruct:
-        typeDef = this.typeDefForTupleStruct(metaType.def as MetaTypeDefTupleStruct);
+        typeDef = this._typeDefForTupleStruct(metaType.def as MetaTypeDefTupleStruct);
         break;
       case MetaTypeInfo.Null:
       default:
@@ -176,8 +176,8 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     return withTypeString({
       info: TypeDefInfo.Null,
       type: '',
-      ...this.typeDefDefFields(metaType, typeIndex),
-      ...this.typeDefIdFields(metaType)
+      ...this._typeDefDefFields(metaType, typeIndex),
+      ...this._typeDefIdFields(metaType)
     }) as TypeDef;
   }
 
@@ -189,13 +189,13 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     return this.typeDefAt(typeIndex);
   }
 
-  private typeDefForEnumVariant (variant: MetaTypeDefEnumVariant): Pick<TypeDef, any> {
+  private _typeDefForEnumVariant (variant: MetaTypeDefEnumVariant): Pick<TypeDef, any> {
     const { 'unit_variant.name': unitNameIndex } = variant as MetaTypeDefEnumVariantUnit;
 
     if (unitNameIndex) {
       return {
         info: TypeDefInfo.Plain,
-        name: this.stringAt(unitNameIndex),
+        name: this._stringAt(unitNameIndex),
         type: 'Null'
       };
     }
@@ -203,7 +203,7 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     const { 'tuple_struct_variant.name': tupleStructVariantNameIndex } = variant as MetaTypeDefEnumVariantTupleStruct;
 
     if (tupleStructVariantNameIndex) {
-      return this.typeDefForTupleStruct(variant as MetaTypeDefEnumVariantTupleStruct);
+      return this._typeDefForTupleStruct(variant as MetaTypeDefEnumVariantTupleStruct);
     }
 
     const { 'struct_variant.name': structVariantNameIndex } = variant as MetaTypeDefEnumVariantStruct;
@@ -218,14 +218,14 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     };
   }
 
-  private typeDefForBuiltinPlain (id: string): Pick<TypeDef, never> {
+  private _typeDefForBuiltinPlain (id: string): Pick<TypeDef, never> {
     return {
       info: TypeDefInfo.Plain,
       type: id
     };
   }
 
-  private typeDefForBuiltinTuple (id: TypeIndex[]): Pick<TypeDef, never> {
+  private _typeDefForBuiltinTuple (id: TypeIndex[]): Pick<TypeDef, never> {
     const sub = id.map((tupleTypeIndex: number): TypeDef => this.typeDefFromMetaTypeAt(tupleTypeIndex));
 
     return {
@@ -234,48 +234,52 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     };
   }
 
-  private typeDefForBuiltinVec (id: MetaTypeIdVec, typeIndex?: TypeIndex): Pick<TypeDef, never> {
+  private _typeDefForBuiltinVec (id: MetaTypeIdVec, typeIndex: TypeIndex = -1): Pick<TypeDef, never> {
     const { 'slice.type': vecTypeIndex } = id;
 
     assert(!typeIndex || vecTypeIndex !== typeIndex, `MetaRegistry: self-referencing registry type at index ${typeIndex}`);
 
     const type = displayType(this.typeDefFromMetaTypeAt(vecTypeIndex));
+
     assert(type && type.length > 0, `MetaRegistry: Invalid builtin Vec type found at index ${typeIndex}`);
 
     return {
       info: TypeDefInfo.Vec,
-      type: `Vec<${type}>`,
-      sub: this.typeDefFromMetaTypeAt(vecTypeIndex)
+      sub: this.typeDefFromMetaTypeAt(vecTypeIndex),
+      type: `Vec<${type}>`
     };
   }
 
-  private typeDefForBuiltinVecFixed (id: MetaTypeIdVecFixed, typeIndex?: TypeIndex): Pick<TypeDef, never> {
-    const { 'array.type': vecTypeIndex, 'array.len': vecLength } = id;
+  private _typeDefForBuiltinVecFixed (id: MetaTypeIdVecFixed, typeIndex: TypeIndex = -1): Pick<TypeDef, never> {
+    const { 'array.len': vecLength, 'array.type': vecTypeIndex } = id;
 
     assert(!vecLength || vecLength <= 256, 'MetaRegistry: Only support for [Type; <length>], where length <= 256');
     assert(!typeIndex || vecTypeIndex !== typeIndex, `MetaRegistry: self-referencing registry type at index ${typeIndex}`);
 
     const type = displayType(this.typeDefFromMetaTypeAt(vecTypeIndex));
+
     assert(type && type.length > 0, `MetaRegistry: Invalid vector type found at index ${typeIndex}`);
 
     return {
       info: TypeDefInfo.VecFixed,
       length: vecLength, // ex: { type: type }
-      type: `[${type};${vecLength}]`,
-      sub: this.typeDefFromMetaTypeAt(vecTypeIndex)
+      sub: this.typeDefFromMetaTypeAt(vecTypeIndex),
+      type: `[${type};${vecLength}]`
     };
   }
 
-  private typeDefForEnum (def: MetaTypeDefEnum, id: MetaTypeIdCustom, typeIndex?: TypeIndex): Pick<TypeDef, any> {
-    const name = id && this.stringAt(id['custom.name']);
+  private _typeDefForEnum (def: MetaTypeDefEnum, id: MetaTypeIdCustom, typeIndex?: TypeIndex): Pick<TypeDef, any> {
+    const name = id && this._stringAt(id['custom.name']);
 
     switch (name) {
       case 'Option':
         return this.typeDefForOption(id, typeIndex);
+
       case 'Result':
         return this.typeDefForResult(id, typeIndex);
+
       default: {
-        const sub = def['enum.variants'].map((variant) => this.typeDefForEnumVariant(variant));
+        const sub = def['enum.variants'].map((variant) => this._typeDefForEnumVariant(variant));
 
         return {
           info: TypeDefInfo.Enum,
@@ -285,19 +289,19 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     }
   }
 
-  private typeDefForClikeEnum (def: MetaTypeDefClikeEnum): Pick<TypeDef, never> {
+  private _typeDefForClikeEnum (def: MetaTypeDefClikeEnum): Pick<TypeDef, never> {
     return {
       info: TypeDefInfo.Enum,
-      sub: def['clike_enum.variants'].map(({ name: nameIndex, discriminant }): TypeDef => ({
+      sub: def['clike_enum.variants'].map(({ discriminant, name: nameIndex }): TypeDef => ({
         ext: { discriminant },
         info: TypeDefInfo.Plain,
-        name: this.stringAt(nameIndex),
+        name: this._stringAt(nameIndex),
         type: 'Null'
       }))
     };
   }
 
-  public typeDefForOption (id: MetaTypeIdCustom, typeIndex?: TypeIndex): Pick<TypeDef, any> {
+  public typeDefForOption (id: MetaTypeIdCustom, typeIndex: TypeIndex = -1): Pick<TypeDef, any> {
     assert(id['custom.params'] && id['custom.params'][0], `Invalid Option type defined at index ${typeIndex}`);
 
     return {
@@ -306,7 +310,7 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     };
   }
 
-  public typeDefForResult (id: MetaTypeIdCustom, typeIndex?: TypeIndex): Pick<TypeDef, any> {
+  public typeDefForResult (id: MetaTypeIdCustom, typeIndex: TypeIndex = -1): Pick<TypeDef, any> {
     assert(id['custom.params'] && id['custom.params'][0] && id['custom.params'][1], `Invalid Result type defined at index ${typeIndex}`);
 
     return {
@@ -322,24 +326,24 @@ export default class MetaRegistry extends MetadataRegistryLookup {
     return withTypeString({
       info: TypeDefInfo.Struct,
       ...(structNameIndex
-        ? { name: this.stringAt(structNameIndex) }
+        ? { name: this._stringAt(structNameIndex) }
         : {}
       ),
       sub: structFields.map((field: MetaTypeDefStructField): TypeDef => ({
         ...this.typeDefFromMetaTypeAt(field.type),
-        name: this.stringAt(field.name)
+        name: this._stringAt(field.name)
       }))
     });
   }
 
-  private typeDefForTupleStruct (def: MetaTypeDefTupleStruct | MetaTypeDefEnumVariantTupleStruct): Pick<TypeDef, any> {
+  private _typeDefForTupleStruct (def: MetaTypeDefTupleStruct | MetaTypeDefEnumVariantTupleStruct): Pick<TypeDef, any> {
     const tupleStructTypes = (def as MetaTypeDefTupleStruct)['tuple_struct.types'] || (def as MetaTypeDefEnumVariantTupleStruct)['tuple_struct_variant.types'];
     const tupleStructNameIndex = (def as MetaTypeDefEnumVariantTupleStruct)['tuple_struct_variant.name'];
 
     return withTypeString({
       info: TypeDefInfo.Tuple,
       ...(tupleStructNameIndex
-        ? { name: this.stringAt(tupleStructNameIndex) }
+        ? { name: this._stringAt(tupleStructNameIndex) }
         : {}
       ),
       sub: tupleStructTypes.map((fieldIndex: number, index: number): TypeDef => ({

packages/api-contract/src/base/Blueprint.ts

@@ -47,18 +47,19 @@ export default class Blueprint<ApiType extends ApiTypes> extends BaseWithTx<ApiT
     assert(!!this.abi.constructors[constructorIndex], `Specified constructor index ${constructorIndex} does not exist`);
 
     return {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
       signAndSend: this.decorateMethod(
         (account: IKeyringPair | string | AccountId | Address): BlueprintCreateResultSubscription<ApiType> => {
-          return this.apiContracts
+          return this._apiContracts
             .create(endowment, maxGas, this.codeHash, this.abi.constructors[constructorIndex](...params))
             .signAndSend(account)
-            .pipe(map(this.createResult));
+            .pipe(map(this._createResult));
         }
       )
     };
   }
 
-  private createResult = (result: SubmittableResult): BlueprintCreateResult<ApiType> => {
+  private _createResult = (result: SubmittableResult): BlueprintCreateResult<ApiType> => {
     let contract: Contract<ApiType> | undefined;
 
     if (result.isInBlock) {

packages/api-contract/src/base/Code.ts

@@ -19,7 +19,6 @@ import { BaseWithTx } from './util';
 
 type CodePutCodeResultSubscription<ApiType extends ApiTypes> = Observable<CodePutCodeResult<ApiType>>;
 
-// eslint-disable-next-line @typescript-eslint/interface-name-prefix
 export interface CodePutCode<ApiType extends ApiTypes> {
   signAndSend (account: IKeyringPair | string | AccountId | Address): CodePutCodeResultSubscription<ApiType>;
 }
@@ -46,17 +45,18 @@ export default class Code<ApiType extends ApiTypes> extends BaseWithTx<ApiType>
 
   public createBlueprint = (maxGas: number | BN): CodePutCode<ApiType> => {
     return {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
       signAndSend: this.decorateMethod(
         (account: IKeyringPair | string | AccountId | Address): CodePutCodeResultSubscription<ApiType> =>
-          this.apiContracts
+          this._apiContracts
             .putCode(maxGas, compactAddLength(this.code))
             .signAndSend(account)
-            .pipe(map(this.createResult))
+            .pipe(map(this._createResult))
       )
     };
   }
 
-  private createResult = (result: ISubmittableResult): CodePutCodeResult<ApiType> => {
+  private _createResult = (result: ISubmittableResult): CodePutCodeResult<ApiType> => {
     let blueprint: Blueprint<ApiType> | undefined;
 
     if (result.isInBlock) {

packages/api-contract/src/base/Contract.ts

@@ -21,7 +21,6 @@ type ContractCallResultSubscription<ApiType extends ApiTypes, CallType extends C
   ? Observable<ContractCallResult<CallType>>
   : Promise<ObsInnerType<ContractCallResult<CallType>>>;
 
-// eslint-disable-next-line @typescript-eslint/interface-name-prefix
 export interface ContractCall<ApiType extends ApiTypes, CallType extends ContractCallTypes> {
   send (account: IKeyringPair | string | AccountId | Address): ContractCallResultSubscription<ApiType, CallType>;
 }
@@ -33,35 +32,42 @@ export type ContractCallResult<CallType extends ContractCallTypes> = CallType ex
 export default class Contract<ApiType extends ApiTypes> extends BaseWithTxAndRpcCall<ApiType> {
   public readonly address: Address;
 
+  constructor (api: ApiObject<ApiType>, abi: ContractABIPre | Abi, decorateMethod: DecorateMethod<ApiType>, address: string | AccountId | Address) {
+    super(api, abi, decorateMethod);
+
+    this.address = this.registry.createType('Address', address);
+  }
+
   public call (as: 'rpc', message: string, value: BN | number, gasLimit: BN | number, ...params: any[]): ContractCall<ApiType, 'rpc'>;
   public call (as: 'tx', message: string, value: BN | number, gasLimit: BN | number, ...params: any[]): ContractCall<ApiType, 'tx'>;
   public call<CallType extends ContractCallTypes> (as: CallType, message: string, value: BN | number, gasLimit: BN | number, ...params: any[]): ContractCall<ApiType, CallType> {
-    const { fn, def } = this.getMessage(message);
+    const { def, fn } = this.getMessage(message);
 
     return {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
       send: this.decorateMethod(
         as === 'rpc' && this.hasRpcContractsCall
           ? (account: IKeyringPair | string | AccountId | Address): ContractCallResult<'rpc'> =>
-            this.rpcContractsCall(
+            this._rpcContractsCall(
               this.registry.createType('ContractCallRequest', {
-                origin: account,
                 dest: this.address.toString(),
-                value,
                 gasLimit,
-                inputData: fn(...params)
+                inputData: fn(...params),
+                origin: account,
+                value
               })
             ).pipe(map((result: ContractExecResult): ContractCallOutcome =>
-              this.createOutcome(result, this.registry.createType('AccountId', account), def, params)
+              this._createOutcome(result, this.registry.createType('AccountId', account), def, params)
             ))
           : (account: IKeyringPair | string | AccountId | Address): ContractCallResult<'tx'> =>
-            this.apiContracts
+            this._apiContracts
               .call(this.address, value, gasLimit, fn(...params))
               .signAndSend(account)
       )
     };
   }
 
-  private createOutcome (result: ContractExecResult, origin: AccountId, message: ContractABIMessage, params: any[]): ContractCallOutcome {
+  private _createOutcome (result: ContractExecResult, origin: AccountId, message: ContractABIMessage, params: any[]): ContractCallOutcome {
     let output: Codec | null = null;
 
     if (result.isSuccess) {
@@ -73,19 +79,13 @@ export default class Contract<ApiType extends ApiTypes> extends BaseWithTxAndRpc
     }
 
     return {
-      time: Date.now(),
+      isSuccess: result.isSuccess,
       message,
       origin,
+      output,
       params,
       result,
-      isSuccess: result.isSuccess,
-      output
+      time: Date.now()
     };
   }
-
-  constructor (api: ApiObject<ApiType>, abi: ContractABIPre | Abi, decorateMethod: DecorateMethod<ApiType>, address: string | AccountId | Address) {
-    super(api, abi, decorateMethod);
-
-    this.address = this.registry.createType('Address', address);
-  }
 }

packages/api-contract/src/base/util.ts

@@ -31,9 +31,9 @@ export abstract class Base<ApiType extends ApiTypes> implements ContractBase<Api
   public get messages (): ContractMessage[] {
     return this.abi.abi.contract.messages.map(
       (def: ContractABIMessage, index): ContractMessage => ({
-        index,
         def,
-        fn: this.abi.messages[def.name] || this.abi.messages[stringCamelCase(name)]
+        fn: this.abi.messages[def.name] || this.abi.messages[stringCamelCase(name)],
+        index
       })
     );
   }
@@ -46,15 +46,16 @@ export abstract class Base<ApiType extends ApiTypes> implements ContractBase<Api
       : 0;
     const def = this.abi.abi.contract.messages[index];
 
-    assert(!!def, `Attempted to access a contract message that does not exist: ${typeof nameOrIndex === 'number' ? `index ${nameOrIndex}` : nameOrIndex}`);
+    assert(!!def, `Attempted to access a contract message that does not exist: ${typeof nameOrIndex === 'number' ? `index ${nameOrIndex}` : (nameOrIndex || 'unknown')}`);
 
     const fn = this.abi.messages[def.name] || this.abi.messages[stringCamelCase(def.name)];
-    return { index, def, fn };
+
+    return { def, fn, index };
   }
 }
 
 export abstract class BaseWithTx<ApiType extends ApiTypes> extends Base<ApiType> {
-  protected get apiContracts (): SubmittableModuleExtrinsics<'rxjs'> {
+  protected get _apiContracts (): SubmittableModuleExtrinsics<'rxjs'> {
     return this.api.rx.tx.contracts;
   }
 
@@ -70,7 +71,7 @@ export abstract class BaseWithTxAndRpcCall<ApiType extends ApiTypes> extends Bas
     return isFunction(this.api.rx.rpc.contracts?.call);
   }
 
-  protected get rpcContractsCall (): DecoratedRpc<'rxjs', RpcInterface>['contracts']['call'] {
+  protected get _rpcContractsCall (): DecoratedRpc<'rxjs', RpcInterface>['contracts']['call'] {
     assert(this.hasRpcContractsCall, 'You need to connect to a node with the contracts.call RPC method.');
 
     return this.api.rx.rpc.contracts.call;

packages/api-contract/src/types.ts

@@ -23,6 +23,7 @@ export interface ContractBase<ApiType extends ApiTypes> {
 
 export interface ContractABITypePre {
   ty: TypeIndex;
+  // eslint-disable-next-line camelcase
   display_name: StringIndex[];
 }
 
@@ -56,6 +57,7 @@ export interface ContractABIMessageCommon {
 
 export interface ContractABIMessagePre extends ContractABIMessageCommon, ContractABIMessageBasePre {
   name: StringIndex;
+  // eslint-disable-next-line camelcase
   return_type: ContractABITypePre | null;
 }
 
@@ -187,6 +189,7 @@ export interface InterfaceAbi {
 }
 
 export interface InterfaceContractCalls {
+  // eslint-disable-next-line @typescript-eslint/ban-types
   [index: string]: Function;
 }
 

packages/api-derive/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "1.8.1",
+  "version": "1.16.1",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
   "keywords": [
@@ -27,18 +27,18 @@
   },
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
-    "@babel/runtime": "^7.9.2",
-    "@polkadot/api": "1.8.1",
-    "@polkadot/rpc-core": "1.8.1",
-    "@polkadot/rpc-provider": "1.8.1",
-    "@polkadot/types": "1.8.1",
-    "@polkadot/util": "^2.6.2",
-    "@polkadot/util-crypto": "^2.6.2",
-    "bn.js": "^5.1.1",
+    "@babel/runtime": "^7.9.6",
+    "@polkadot/api": "1.16.1",
+    "@polkadot/rpc-core": "1.16.1",
+    "@polkadot/rpc-provider": "1.16.1",
+    "@polkadot/types": "1.16.1",
+    "@polkadot/util": "^2.11.1",
+    "@polkadot/util-crypto": "^2.11.1",
+    "bn.js": "^5.1.2",
     "memoizee": "^0.4.14",
-    "rxjs": "^6.5.4"
+    "rxjs": "^6.5.5"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^2.6.2"
+    "@polkadot/keyring": "^2.11.1"
   }
 }

packages/api-derive/src/accounts/flags.ts

@@ -0,0 +1,69 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { AccountId, Address, Balance } from '@polkadot/types/interfaces';
+import { ITuple } from '@polkadot/types/types';
+import { DeriveAccountFlags } from '../types';
+
+import { Observable, combineLatest, of } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { Vec } from '@polkadot/types';
+
+import { memo } from '../util';
+
+type FlagsIntermediate = [
+  Vec<ITuple<[AccountId, Balance]>> | undefined,
+  AccountId[],
+  AccountId[],
+  AccountId[],
+  AccountId | undefined
+];
+
+function isIncludedFn (accountId: AccountId | Address | string): (_: AccountId | Address |string) => boolean {
+  return function (id: AccountId | Address | string): boolean {
+    return id.toString() === accountId.toString();
+  };
+}
+
+/**
+ * @name info
+ * @description Returns account membership flags
+ */
+export function flags (api: ApiInterfaceRx): (address?: AccountId | Address | string | null) => Observable<DeriveAccountFlags> {
+  return memo((address?: AccountId | Address | string | null): Observable<DeriveAccountFlags> => {
+    const councilSection = api.query.electionsPhragmen ? 'electionsPhragmen' : 'elections';
+
+    return (
+      combineLatest([
+        address && api.query[councilSection]?.members
+          ? api.query[councilSection].members()
+          : of(undefined),
+        address && api.query.council?.members
+          ? api.query.council.members()
+          : of([]),
+        address && api.query.technicalCommittee?.members
+          ? api.query.technicalCommittee.members()
+          : of([]),
+        address && api.query.society?.members
+          ? api.query.society.members()
+          : of([]),
+        address && api.query.sudo?.key
+          ? api.query.sudo.key()
+          : of(undefined)
+      ]) as Observable<FlagsIntermediate>
+    ).pipe(
+      map(([electionsMembers, councilMembers, technicalCommitteeMembers, societyMembers, sudoKey]): DeriveAccountFlags => {
+        const isIncluded = address ? isIncludedFn(address) : (): boolean => false;
+
+        return {
+          isCouncil: (electionsMembers?.map(([id]: ITuple<[AccountId, Balance]>) => id) || councilMembers || []).some(isIncluded),
+          isSociety: (societyMembers || []).some(isIncluded),
+          isSudo: sudoKey?.toString() === address?.toString(),
+          isTechCommittee: (technicalCommitteeMembers || []).some(isIncluded)
+        };
+      })
+    );
+  });
+}

packages/api-derive/src/accounts/idAndIndex.ts

@@ -3,6 +3,7 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import { AccountId, AccountIndex, Address } from '@polkadot/types/interfaces';
+import { AccountIdAndIndex } from '../types';
 
 import { Observable, of } from 'rxjs';
 import { map } from 'rxjs/operators';
@@ -12,8 +13,6 @@ import { decodeAddress } from '@polkadot/util-crypto';
 
 import { memo } from '../util';
 
-export type AccountIdAndIndex = [AccountId?, AccountIndex?];
-
 function retrieve (api: ApiInterfaceRx, address: Address | AccountId | AccountIndex | string | null | undefined): Observable<AccountIdAndIndex> {
   try {
     // yes, this can fail, don't care too much, catch will catch it

packages/api-derive/src/accounts/index.ts

@@ -2,6 +2,7 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
+export * from './flags';
 export * from './idAndIndex';
 export * from './idToIndex';
 export * from './indexToId';

packages/api-derive/src/accounts/indexToId.ts

@@ -10,6 +10,7 @@ import { map, startWith } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { ENUMSET_SIZE } from '@polkadot/types/generic/AccountIndex';
 import { Option, Vec } from '@polkadot/types';
+import { isFunction } from '@polkadot/util';
 
 import { memo } from '../util';
 
@@ -51,7 +52,7 @@ function query (api: ApiInterfaceRx, accountIndex: AccountIndex | string): Obser
 export function indexToId (api: ApiInterfaceRx): (accountIndex: AccountIndex | string) => Observable<AccountId | undefined> {
   return memo((accountIndex: AccountIndex | string): Observable<AccountId | undefined> =>
     api.query.indices
-      ? api.query.indices.accounts
+      ? isFunction(api.query.indices.accounts)
         ? query(api, accountIndex)
         : queryEnumSet(api, accountIndex)
       : of(undefined)

packages/api-derive/src/accounts/indexes.ts

@@ -10,6 +10,7 @@ import { Observable, of } from 'rxjs';
 import { map, startWith, switchMap } from 'rxjs/operators';
 import { ENUMSET_SIZE } from '@polkadot/types/generic/AccountIndex';
 import { Vec } from '@polkadot/types';
+import { isFunction } from '@polkadot/util';
 
 import { memo } from '../util';
 
@@ -72,7 +73,7 @@ function queryAccounts (api: ApiInterfaceRx): Observable<AccountIndexes> {
 export function indexes (api: ApiInterfaceRx): () => Observable<AccountIndexes> {
   return memo((): Observable<AccountIndexes> =>
     (api.query.indices
-      ? api.query.indices.accounts
+      ? isFunction(api.query.indices.accounts)
         ? queryAccounts(api)
         : queryEnumSet(api)
       : of({} as AccountIndexes)

packages/api-derive/src/accounts/info.ts

@@ -5,11 +5,11 @@
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { AccountId, AccountIndex, Address, Balance, Registration } from '@polkadot/types/interfaces';
 import { ITuple } from '@polkadot/types/types';
-import { DeriveAccountFlags, DeriveAccountInfo, DeriveAccountRegistration } from '../types';
+import { DeriveAccountInfo, DeriveAccountRegistration } from '../types';
 
 import { Observable, combineLatest, of } from 'rxjs';
 import { map, switchMap } from 'rxjs/operators';
-import { Bytes, Data, Option, u32, Vec } from '@polkadot/types';
+import { Bytes, Data, Option, u32 } from '@polkadot/types';
 import { u8aToString } from '@polkadot/util';
 
 import { memo } from '../util';
@@ -17,15 +17,9 @@ import { memo } from '../util';
 function dataAsString (data: Data): string | undefined {
   return data.isRaw
     ? u8aToString(data.asRaw.toU8a(true))
-    : data.isSha256
-      ? data.asSha256.toHex()
-      : undefined;
-}
-
-function includedWrapper (accountId?: AccountId): (_: AccountId) => boolean {
-  return function (id: AccountId): boolean {
-    return id.eq(accountId);
-  };
+    : data.isNone
+      ? undefined
+      : data.toHex();
 }
 
 function retrieveNick (api: ApiInterfaceRx, accountId?: AccountId): Observable<string | undefined> {
@@ -59,6 +53,7 @@ function extractIdentity (identityOfOpt?: Option<Registration>, superOf?: [Accou
       : undefined,
     email: dataAsString(info.email),
     image: dataAsString(info.image),
+    judgements,
     legal: dataAsString(info.legal),
     other: info.additional.reduce((other: Record<string, string>, [_key, _value]): Record<string, string> => {
       const key = dataAsString(_key);
@@ -78,8 +73,7 @@ function extractIdentity (identityOfOpt?: Option<Registration>, superOf?: [Accou
       : undefined,
     riot: dataAsString(info.riot),
     twitter: dataAsString(info.twitter),
-    web: dataAsString(info.web),
-    judgements
+    web: dataAsString(info.web)
   };
 }
 
@@ -115,39 +109,6 @@ function retrieveIdentity (api: ApiInterfaceRx, accountId?: AccountId): Observab
   );
 }
 
-function retrieveFlags (api: ApiInterfaceRx, accountId?: AccountId): Observable<DeriveAccountFlags> {
-  const councilSection = api.query.electionsPhragmen ? 'electionsPhragmen' : 'elections';
-
-  return combineLatest([
-    api.query[councilSection]?.members
-      ? api.query[councilSection].members<Vec<ITuple<[AccountId, Balance]>>>()
-      : of(undefined),
-    api.query.council?.members
-      ? api.query.council.members()
-      : of([]),
-    api.query.technicalCommittee?.members
-      ? api.query.technicalCommittee.members()
-      : of([]),
-    api.query.society?.members
-      ? api.query.society.members()
-      : of([]),
-    api.query.sudo?.key
-      ? api.query.sudo.key()
-      : of(undefined)
-  ]).pipe(
-    map(([electionsMembers, councilMembers, technicalCommitteeMembers, societyMembers, sudoKey]): DeriveAccountFlags => {
-      const checkIncluded = includedWrapper(accountId);
-
-      return {
-        isCouncil: (electionsMembers?.map(([id]) => id) || councilMembers || []).some(checkIncluded),
-        isTechCommittee: technicalCommitteeMembers.some(checkIncluded),
-        isSociety: societyMembers.some(checkIncluded),
-        isSudo: !!sudoKey && sudoKey.eq(accountId)
-      };
-    })
-  );
-}
-
 /**
  * @name info
  * @description Returns aux. info with regards to an account, current that includes the accountId, accountIndex and nickname
@@ -155,16 +116,15 @@ function retrieveFlags (api: ApiInterfaceRx, accountId?: AccountId): Observable<
 export function info (api: ApiInterfaceRx): (address?: AccountIndex | AccountId | Address | string | null) => Observable<DeriveAccountInfo> {
   return memo((address?: AccountIndex | AccountId | Address | string | null): Observable<DeriveAccountInfo> =>
     api.derive.accounts.idAndIndex(address).pipe(
-      switchMap(([accountId, accountIndex]): Observable<[Partial<DeriveAccountInfo>, DeriveAccountFlags, DeriveAccountRegistration, string?]> =>
+      switchMap(([accountId, accountIndex]): Observable<[Partial<DeriveAccountInfo>, DeriveAccountRegistration, string?]> =>
         combineLatest([
           of({ accountId, accountIndex }),
-          retrieveFlags(api, accountId),
           retrieveIdentity(api, accountId),
           retrieveNick(api, accountId)
         ])
       ),
-      map(([{ accountId, accountIndex }, flags, identity, nickname]): DeriveAccountInfo => ({
-        accountId, accountIndex, ...flags, identity, nickname
+      map(([{ accountId, accountIndex }, identity, nickname]): DeriveAccountInfo => ({
+        accountId, accountIndex, identity, nickname
       }))
     ));
 }

packages/api-derive/src/accounts/types.ts

@@ -0,0 +1,38 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { AccountId, AccountIndex, RegistrationJudgement } from '@polkadot/types/interfaces';
+
+export type AccountIdAndIndex = [AccountId?, AccountIndex?];
+
+export type AccountIndexes = Record<string, AccountIndex>;
+
+export interface DeriveAccountRegistration {
+  display?: string;
+  displayParent?: string;
+  email?: string;
+  image?: string;
+  legal?: string;
+  other?: Record<string, string>;
+  parent?: AccountId;
+  pgp?: string;
+  riot?: string;
+  twitter?: string;
+  web?: string;
+  judgements: RegistrationJudgement[];
+}
+
+export interface DeriveAccountFlags {
+  isCouncil: boolean;
+  isSociety: boolean;
+  isSudo: boolean;
+  isTechCommittee: boolean;
+}
+
+export interface DeriveAccountInfo {
+  accountId?: AccountId;
+  accountIndex?: AccountIndex;
+  identity: DeriveAccountRegistration;
+  nickname?: string;
+}

packages/api-derive/src/balances/account.ts

@@ -4,17 +4,18 @@
 
 import { AccountId, AccountData, AccountIndex, AccountInfo, Address, Balance, Index } from '@polkadot/types/interfaces';
 import { ITuple } from '@polkadot/types/types';
-import { DerivedBalancesAccount } from '../types';
+import { DeriveBalancesAccount } from '../types';
 
 import { Observable, combineLatest, of } from 'rxjs';
 import { map, switchMap } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
+import { isFunction } from '@polkadot/util';
 
 import { memo } from '../util';
 
 type Result = [Balance, Balance, Balance, Balance, Index];
 
-function calcBalances (api: ApiInterfaceRx, [accountId, [freeBalance, reservedBalance, frozenFee, frozenMisc, accountNonce]]: [AccountId, Result]): DerivedBalancesAccount {
+function calcBalances (api: ApiInterfaceRx, [accountId, [freeBalance, reservedBalance, frozenFee, frozenMisc, accountNonce]]: [AccountId, Result]): DeriveBalancesAccount {
   return {
     accountId,
     accountNonce,
@@ -44,7 +45,7 @@ function queryBalancesAccount (api: ApiInterfaceRx, accountId: AccountId): Obser
     [api.query.balances.account, accountId],
     [api.query.system.accountNonce, accountId]
   ]).pipe(
-    map(([{ free, reserved, miscFrozen, feeFrozen }, accountNonce]): Result =>
+    map(([{ feeFrozen, free, miscFrozen, reserved }, accountNonce]): Result =>
       [free, reserved, feeFrozen, miscFrozen, accountNonce]
     )
   );
@@ -54,7 +55,7 @@ function queryCurrent (api: ApiInterfaceRx, accountId: AccountId): Observable<Re
   // AccountInfo is current, support old, eg. Edgeware
   return api.query.system.account<AccountInfo | ITuple<[Index, AccountData]>>(accountId).pipe(
     map((infoOrTuple): Result => {
-      const { free, reserved, miscFrozen, feeFrozen } = (infoOrTuple as AccountInfo).nonce
+      const { feeFrozen, free, miscFrozen, reserved } = (infoOrTuple as AccountInfo).nonce
         ? (infoOrTuple as AccountInfo).data
         : (infoOrTuple as [Index, AccountData])[1];
       const accountNonce = (infoOrTuple as AccountInfo).nonce || (infoOrTuple as [Index, AccountData])[0];
@@ -79,22 +80,22 @@ function queryCurrent (api: ApiInterfaceRx, accountId: AccountId): Observable<Re
  * });
  * ```
  */
-export function account (api: ApiInterfaceRx): (address: AccountIndex | AccountId | Address | string) => Observable<DerivedBalancesAccount> {
-  return memo((address: AccountIndex | AccountId | Address | string): Observable<DerivedBalancesAccount> =>
+export function account (api: ApiInterfaceRx): (address: AccountIndex | AccountId | Address | string) => Observable<DeriveBalancesAccount> {
+  return memo((address: AccountIndex | AccountId | Address | string): Observable<DeriveBalancesAccount> =>
     api.derive.accounts.info(address).pipe(
       switchMap(({ accountId }): Observable<[AccountId, Result]> =>
         (accountId
           ? combineLatest([
             of(accountId),
-            api.query.system.account
+            isFunction(api.query.system.account)
               ? queryCurrent(api, accountId)
-              : api.query.balances.account
+              : isFunction(api.query.balances.account)
                 ? queryBalancesAccount(api, accountId)
                 : queryBalancesFree(api, accountId)
           ])
           : of([api.registry.createType('AccountId'), [api.registry.createType('Balance'), api.registry.createType('Balance'), api.registry.createType('Balance'), api.registry.createType('Balance'), api.registry.createType('Index')]])
         )
       ),
-      map((result): DerivedBalancesAccount => calcBalances(api, result))
+      map((result): DeriveBalancesAccount => calcBalances(api, result))
     ));
 }

packages/api-derive/src/balances/all.ts

@@ -3,21 +3,21 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import { AccountId, AccountIndex, Address, Balance, BalanceLock, BalanceLockTo212, BlockNumber, VestingInfo, VestingSchedule } from '@polkadot/types/interfaces';
-import { DerivedBalancesAccount, DerivedBalancesAll } from '../types';
+import { DeriveBalancesAccount, DeriveBalancesAll } from '../types';
 
 import BN from 'bn.js';
 import { Observable, combineLatest, of } from 'rxjs';
 import { map, switchMap } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { Option, Vec } from '@polkadot/types';
-import { bnMax } from '@polkadot/util';
+import { bnMax, isFunction } from '@polkadot/util';
 
 import { memo } from '../util';
 
 type ResultBalance = [VestingInfo | null, (BalanceLock | BalanceLockTo212)[]];
-type Result = [DerivedBalancesAccount, BlockNumber, ResultBalance];
+type Result = [DeriveBalancesAccount, BlockNumber, ResultBalance];
 
-function calcBalances (api: ApiInterfaceRx, [{ accountId, accountNonce, freeBalance, frozenFee, frozenMisc, reservedBalance, votingBalance }, bestNumber, [vesting, locks]]: Result): DerivedBalancesAll {
+function calcBalances (api: ApiInterfaceRx, [{ accountId, accountNonce, freeBalance, frozenFee, frozenMisc, reservedBalance, votingBalance }, bestNumber, [vesting, locks]]: Result): DeriveBalancesAll {
   let lockedBalance = api.registry.createType('Balance');
   let lockedBreakdown: (BalanceLock | BalanceLockTo212)[] = [];
   let allLocked = false;
@@ -127,21 +127,21 @@ function queryCurrent (api: ApiInterfaceRx, accountId: AccountId): Observable<Re
  * });
  * ```
  */
-export function all (api: ApiInterfaceRx): (address: AccountIndex | AccountId | Address | string) => Observable<DerivedBalancesAll> {
-  return memo((address: AccountIndex | AccountId | Address | string): Observable<DerivedBalancesAll> =>
+export function all (api: ApiInterfaceRx): (address: AccountIndex | AccountId | Address | string) => Observable<DeriveBalancesAll> {
+  return memo((address: AccountIndex | AccountId | Address | string): Observable<DeriveBalancesAll> =>
     api.derive.balances.account(address).pipe(
       switchMap((account): Observable<Result> =>
         (!account.accountId.isEmpty
           ? combineLatest([
             of(account),
             api.derive.chain.bestNumber(),
-            api.query.balances.account
+            isFunction(api.query.balances.account)
               ? queryCurrent(api, account.accountId)
               : queryOld(api, account.accountId)
           ])
           : of([account, api.registry.createType('BlockNumber'), [null, api.registry.createType('Vec<BalanceLock>')]])
         )
       ),
-      map((result): DerivedBalancesAll => calcBalances(api, result))
+      map((result): DeriveBalancesAll => calcBalances(api, result))
     ));
 }

packages/api-derive/src/balances/fees.ts

@@ -4,7 +4,7 @@
 
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { Balance } from '@polkadot/types/interfaces';
-import { DerivedFees } from '../types';
+import { DeriveFees } from '../types';
 
 import { Observable, of } from 'rxjs';
 import { map } from 'rxjs/operators';
@@ -24,19 +24,19 @@ import { memo } from '../util';
  * });
  * ```
  */
-export function fees (api: ApiInterfaceRx): () => Observable<DerivedFees> {
-  return memo((): Observable<DerivedFees> =>
+export function fees (api: ApiInterfaceRx): () => Observable<DeriveFees> {
+  return memo((): Observable<DeriveFees> =>
     of([
       // deprecated - remove
-      (api.consts.balances?.creationFee as Balance) || api.registry.createType('Balance'),
-      (api.consts.balances?.transferFee as Balance) || api.registry.createType('Balance'),
+      (api.consts.balances?.creationFee as unknown as Balance) || api.registry.createType('Balance'),
+      (api.consts.balances?.transferFee as unknown as Balance) || api.registry.createType('Balance'),
 
       // current
       (api.consts.balances?.existentialDeposit as Balance) || api.registry.createType('Balance'),
-      (api.consts.transactionPayment?.transactionBaseFee as Balance) || api.registry.createType('Balance'),
+      (api.consts.transactionPayment?.transactionBaseFee as unknown as Balance) || api.registry.createType('Balance'),
       (api.consts.transactionPayment?.transactionByteFee as Balance) || api.registry.createType('Balance')
     ]).pipe(
-      map(([creationFee, transferFee, existentialDeposit, transactionBaseFee, transactionByteFee]): DerivedFees => ({
+      map(([creationFee, transferFee, existentialDeposit, transactionBaseFee, transactionByteFee]): DeriveFees => ({
         creationFee,
         existentialDeposit,
         transactionBaseFee,

packages/api-derive/src/balances/votingBalances.ts

@@ -3,19 +3,19 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import { AccountId, AccountIndex, Address } from '@polkadot/types/interfaces';
-import { DerivedBalancesAccount } from '../types';
+import { DeriveBalancesAccount } from '../types';
 
 import { Observable, combineLatest, of } from 'rxjs';
 import { ApiInterfaceRx } from '@polkadot/api/types';
 
 import { memo } from '../util';
 
-export function votingBalances (api: ApiInterfaceRx): (addresses?: (AccountId | AccountIndex | Address | string)[]) => Observable<DerivedBalancesAccount[]> {
-  return memo((addresses?: (AccountId | AccountIndex | Address | string)[]): Observable<DerivedBalancesAccount[]> =>
+export function votingBalances (api: ApiInterfaceRx): (addresses?: (AccountId | AccountIndex | Address | string)[]) => Observable<DeriveBalancesAccount[]> {
+  return memo((addresses?: (AccountId | AccountIndex | Address | string)[]): Observable<DeriveBalancesAccount[]> =>
     !addresses || !addresses.length
-      ? of([] as DerivedBalancesAccount[])
+      ? of([] as DeriveBalancesAccount[])
       : combineLatest(
-        addresses.map((accountId): Observable<DerivedBalancesAccount> =>
+        addresses.map((accountId): Observable<DeriveBalancesAccount> =>
           api.derive.balances.account(accountId)
         )
       )

packages/api-derive/src/collective/proposals.ts

@@ -4,17 +4,20 @@
 
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { Hash, Proposal, Votes } from '@polkadot/types/interfaces';
-import { DerivedCollectiveProposal } from '../types';
+import { DeriveCollectiveProposal } from '../types';
 
 import { Observable, combineLatest, of } from 'rxjs';
 import { map, switchMap } from 'rxjs/operators';
 import { Option } from '@polkadot/types';
+import { isFunction } from '@polkadot/util';
+
+import { memo } from '../util';
 
 type Result = [Hash[], Option<Proposal>[], Option<Votes>[]];
 
-function parse ([hashes, proposals, votes]: Result): DerivedCollectiveProposal[] {
+function parse ([hashes, proposals, votes]: Result): DeriveCollectiveProposal[] {
   return proposals
-    .map((proposalOpt, index): DerivedCollectiveProposal | null =>
+    .map((proposalOpt, index): DeriveCollectiveProposal | null =>
       proposalOpt.isSome
         ? {
           hash: hashes[index],
@@ -23,12 +26,12 @@ function parse ([hashes, proposals, votes]: Result): DerivedCollectiveProposal[]
         }
         : null
     )
-    .filter((proposal): proposal is DerivedCollectiveProposal => !!proposal);
+    .filter((proposal): proposal is DeriveCollectiveProposal => !!proposal);
 }
 
-export function proposals (api: ApiInterfaceRx, section: 'council' | 'technicalCommittee'): () => Observable<DerivedCollectiveProposal[]> {
-  return (): Observable<DerivedCollectiveProposal[]> =>
-    api.query[section]?.proposals
+export function proposals (api: ApiInterfaceRx, section: 'council' | 'technicalCommittee'): () => Observable<DeriveCollectiveProposal[]> {
+  return memo((): Observable<DeriveCollectiveProposal[]> =>
+    isFunction(api.query[section]?.proposals)
       ? api.query[section].proposals().pipe(
         switchMap((hashes: Hash[]): Observable<Result> =>
           hashes.length
@@ -41,5 +44,6 @@ export function proposals (api: ApiInterfaceRx, section: 'council' | 'technicalC
         ),
         map(parse)
       )
-      : of([] as DerivedCollectiveProposal[]);
+      : of([] as DeriveCollectiveProposal[])
+  );
 }

packages/api-derive/src/contracts/fees.ts

@@ -3,7 +3,7 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import { ApiInterfaceRx } from '@polkadot/api/types';
-import { DerivedContractFees } from '../types';
+import { DeriveContractFees } from '../types';
 
 import BN from 'bn.js';
 import { Observable, of } from 'rxjs';
@@ -44,10 +44,10 @@ function queryConstants (api: ApiInterfaceRx): Observable<ResultV2> {
  * });
  * ```
  */
-export function fees (api: ApiInterfaceRx): () => Observable<DerivedContractFees> {
-  return memo((): Observable<DerivedContractFees> => {
+export function fees (api: ApiInterfaceRx): () => Observable<DeriveContractFees> {
+  return memo((): Observable<DeriveContractFees> => {
     return queryConstants(api).pipe(
-      map(([creationFee, transferFee, callBaseFee, contractFee, rentByteFee, rentDepositOffset, tombstoneDeposit, transactionBaseFee, transactionByteFee]): DerivedContractFees => ({
+      map(([creationFee, transferFee, callBaseFee, contractFee, rentByteFee, rentDepositOffset, tombstoneDeposit, transactionBaseFee, transactionByteFee]): DeriveContractFees => ({
         callBaseFee,
         contractFee,
         creationFee,

packages/api-derive/src/council/index.ts

@@ -3,3 +3,5 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 export * from './proposals';
+export * from './votes';
+export * from './votesOf';

packages/api-derive/src/council/proposals.ts

@@ -3,12 +3,12 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import { ApiInterfaceRx } from '@polkadot/api/types';
-import { DerivedCollectiveProposals } from '../types';
+import { DeriveCollectiveProposals } from '../types';
 
 import { Observable } from 'rxjs';
 import { proposals as collectiveProposals } from '../collective';
 import { memo } from '../util';
 
-export function proposals (api: ApiInterfaceRx): () => Observable<DerivedCollectiveProposals> {
+export function proposals (api: ApiInterfaceRx): () => Observable<DeriveCollectiveProposals> {
   return memo(collectiveProposals(api, 'council'));
 }

packages/api-derive/src/council/types.ts

@@ -0,0 +1,12 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { AccountId, Balance } from '@polkadot/types/interfaces';
+
+export interface DeriveCouncilVote {
+  stake: Balance;
+  votes: AccountId[];
+}
+
+export type DeriveCouncilVotes = [AccountId, DeriveCouncilVote][];

packages/api-derive/src/council/votes.ts

@@ -0,0 +1,90 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { AccountId, Balance } from '@polkadot/types/interfaces';
+import { ITuple } from '@polkadot/types/types';
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { DeriveCouncilVote, DeriveCouncilVotes } from '../types';
+
+import { Observable, combineLatest } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { Vec } from '@polkadot/types';
+
+import { memo } from '../util';
+
+function retrieveStakeOf (api: ApiInterfaceRx): Observable<[AccountId, Balance][]> {
+  const elections = (api.query.electionsPhragmen || api.query.elections);
+
+  return elections.stakeOf.creator.meta.type.asMap.linked.isTrue
+    ? elections.stakeOf<ITuple<[Vec<AccountId>, Vec<Balance>]>>().pipe(
+      map(([voters, stake]) =>
+        voters.map((voter, index): [AccountId, Balance] => [voter, stake[index]])
+      )
+    )
+    : elections.stakeOf.entries<Balance>().pipe(
+      map((entries) =>
+        entries.map(([key, stake]) => [key.args[0] as AccountId, stake])
+      )
+    );
+}
+
+function retrieveVoteOf (api: ApiInterfaceRx): Observable<[AccountId, AccountId[]][]> {
+  const elections = (api.query.electionsPhragmen || api.query.elections);
+
+  return elections.votesOf.creator.meta.type.asMap.linked.isTrue
+    ? elections.votesOf<ITuple<[Vec<AccountId>, Vec<Vec<AccountId>>]>>().pipe(
+      map(([voters, votes]) =>
+        voters.map((voter, index) => [voter, votes[index]])
+      )
+    )
+    : elections.votesOf.entries<Vec<AccountId>>().pipe(
+      map((entries) =>
+        entries.map(([key, votes]) => [key.args[0] as AccountId, votes])
+      )
+    );
+}
+
+function retrievePrev (api: ApiInterfaceRx): Observable<DeriveCouncilVotes> {
+  return combineLatest([retrieveStakeOf(api), retrieveVoteOf(api)]).pipe(
+    map(([stakes, votes]): DeriveCouncilVotes => {
+      const result: DeriveCouncilVotes = [];
+
+      votes.forEach(([voter, votes]): void => {
+        result.push([voter, { stake: api.registry.createType('Balance'), votes }]);
+      });
+
+      stakes.forEach(([staker, stake]): void => {
+        const entry = result.find(([voter]) => voter.eq(staker));
+
+        if (entry) {
+          entry[1].stake = stake;
+        } else {
+          result.push([staker, { stake, votes: [] }]);
+        }
+      });
+
+      return result;
+    })
+  );
+}
+
+function retrieveCurrent (api: ApiInterfaceRx): Observable<DeriveCouncilVotes> {
+  const elections = (api.query.electionsPhragmen || api.query.elections);
+
+  return elections.voting.entries<ITuple<[Balance, Vec<AccountId>]>>().pipe(
+    map((entries): DeriveCouncilVotes =>
+      entries.map(([key, [stake, votes]]): [AccountId, DeriveCouncilVote] =>
+        [key.args[0] as AccountId, { stake, votes }]
+      )
+    )
+  );
+}
+
+export function votes (api: ApiInterfaceRx): () => Observable<DeriveCouncilVotes> {
+  return memo((): Observable<DeriveCouncilVotes> =>
+    (api.query.electionsPhragmen || api.query.elections).stakeOf
+      ? retrievePrev(api)
+      : retrieveCurrent(api)
+  );
+}

packages/api-derive/src/council/votesOf.ts

@@ -0,0 +1,24 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { AccountId } from '@polkadot/types/interfaces';
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { DeriveCouncilVote } from '../types';
+
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { memo } from '../util';
+
+export function votesOf (api: ApiInterfaceRx): (accountId: string | Uint8Array | AccountId) => Observable<DeriveCouncilVote> {
+  return memo((accountId: string | Uint8Array | AccountId): Observable<DeriveCouncilVote> =>
+    api.derive.council.votes().pipe(
+      map((votes): DeriveCouncilVote =>
+        (
+          votes.find(([from]) => from.eq(accountId)) ||
+          [null, { stake: api.registry.createType('Balance'), votes: [] as AccountId[] }]
+        )[1]
+      )
+    )
+  );
+}

packages/api-derive/src/democracy/dispatchQueue.ts

@@ -0,0 +1,105 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { BlockNumber, Hash, ReferendumIndex, Scheduled } from '@polkadot/types/interfaces';
+import { ITuple } from '@polkadot/types/types';
+import { DeriveDispatch, DeriveProposalImage } from '../types';
+
+import { Observable, combineLatest, of } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { Option, Vec, u64 } from '@polkadot/types';
+import { isFunction, stringToHex } from '@polkadot/util';
+
+import { memo } from '../util';
+
+const DEMOCRACY_ID = stringToHex('democrac');
+
+interface SchedulerInfo {
+  at: BlockNumber;
+  imageHash: Hash;
+  index: ReferendumIndex;
+}
+
+function queryQueue (api: ApiInterfaceRx): Observable<DeriveDispatch[]> {
+  return api.query.democracy.dispatchQueue<Vec<ITuple<[BlockNumber, Hash, ReferendumIndex]>>>().pipe(
+    switchMap((dispatches) =>
+      combineLatest([
+        of(dispatches),
+        api.derive.democracy.preimages(
+          dispatches.map(([, hash]) => hash))
+      ])
+    ),
+    map(([dispatches, images]) =>
+      dispatches.map(([at, imageHash, index], dispatchIndex): DeriveDispatch => ({
+        at,
+        image: images[dispatchIndex],
+        imageHash,
+        index
+      }))
+    )
+  );
+}
+
+function schedulerEntries (api: ApiInterfaceRx): Observable<[BlockNumber[], Option<Scheduled>[][]]> {
+  // We don't get entries, but rather we get the keys (triggered via finished referendums) and
+  // the subscribe to those keys - this means we pickup when the schedulers actually executes
+  // at a block, the entry for that block will become empty
+  return api.derive.democracy.referendumsFinished().pipe(
+    switchMap(() =>
+      api.query.scheduler.agenda.keys()
+    ),
+    switchMap((keys) => {
+      const blockNumbers = keys.map((key) => key.args[0] as BlockNumber);
+
+      return combineLatest([
+        of(blockNumbers),
+        api.query.scheduler.agenda.multi<Vec<Option<Scheduled>>>(blockNumbers)
+      ]);
+    })
+  );
+}
+
+function queryScheduler (api: ApiInterfaceRx): Observable<DeriveDispatch[]> {
+  return schedulerEntries(api).pipe(
+    switchMap(([blockNumbers, agendas]): Observable<[SchedulerInfo[], (DeriveProposalImage | undefined)[]]> => {
+      const result: SchedulerInfo[] = [];
+
+      blockNumbers.forEach((at, index): void => {
+        agendas[index].filter((optScheduled) => optScheduled.isSome).forEach((optScheduled): void => {
+          const scheduled = optScheduled.unwrap();
+
+          if (scheduled.maybeId.isSome) {
+            const id = scheduled.maybeId.unwrap().toHex();
+
+            if (id.startsWith(DEMOCRACY_ID)) {
+              const [, index] = api.registry.createType('(u64, ReferendumIndex)' as any, id) as ITuple<[u64, ReferendumIndex]>;
+              const imageHash = scheduled.call.args[0] as Hash;
+
+              result.push({ at, imageHash, index });
+            }
+          }
+        });
+      });
+
+      return combineLatest([
+        of(result),
+        api.derive.democracy.preimages(result.map(({ imageHash }) => imageHash))
+      ]);
+    }),
+    map(([infos, images]): DeriveDispatch[] =>
+      infos.map((info, index) => ({ ...info, image: images[index] }))
+    )
+  );
+}
+
+export function dispatchQueue (api: ApiInterfaceRx): () => Observable<DeriveDispatch[]> {
+  return memo((): Observable<DeriveDispatch[]> =>
+    isFunction(api.query.scheduler?.agenda)
+      ? queryScheduler(api)
+      : api.query.democracy.dispatchQueue
+        ? queryQueue(api)
+        : of([])
+  );
+}

packages/api-derive/src/democracy/index.ts

@@ -2,8 +2,15 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
+export * from './dispatchQueue';
+export * from './locks';
+export * from './nextExternal';
+export * from './preimage';
+export * from './preimages';
 export * from './proposals';
-export * from './referendumInfos';
+export * from './referendumIds';
 export * from './referendums';
-export * from './referendumVotesFor';
-export * from './votes';
+export * from './referendumsActive';
+export * from './referendumsFinished';
+export * from './referendumsInfo';
+export * from './sqrtElectorate';

packages/api-derive/src/democracy/locks.ts

@@ -0,0 +1,66 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { AccountId, ReferendumInfo, ReferendumInfoTo239, VotingDirect, VotingDirectVote } from '@polkadot/types/interfaces';
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { DeriveDemocracyLock } from '../types';
+
+import BN from 'bn.js';
+import { Observable, of } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
+import { Option } from '@polkadot/types';
+import { isUndefined } from '@polkadot/util';
+
+import { memo } from '../util';
+
+const LOCKUPS = [0, 1, 2, 4, 8, 16, 32];
+const ZERO = new BN(0);
+
+function parseLock (api: ApiInterfaceRx, [referendumId, accountVote]: VotingDirectVote, referendum: ReferendumInfo): DeriveDemocracyLock {
+  const { balance, vote } = accountVote.asStandard;
+  let unlockAt = ZERO;
+
+  if (referendum.isFinished) {
+    const { approved, end } = referendum.asFinished;
+
+    if ((approved.isTrue && vote.isAye) || (approved.isFalse && vote.isNay)) {
+      unlockAt = end.add(api.consts.democracy.enactmentPeriod.muln(LOCKUPS[vote.conviction.index]));
+    }
+  }
+
+  return { balance, isFinished: referendum.isFinished, referendumId, unlockAt, vote };
+}
+
+function directLocks (api: ApiInterfaceRx, { votes }: VotingDirect): Observable<DeriveDemocracyLock[]> {
+  if (!votes.length) {
+    return of([]);
+  }
+
+  return api.query.democracy.referendumInfoOf.multi<Option<ReferendumInfo | ReferendumInfoTo239>>(votes.map(([referendumId]) => referendumId)).pipe(
+    map((referendums) =>
+      votes
+        .map((vote, index): [VotingDirectVote, ReferendumInfo | ReferendumInfoTo239 | null] =>
+          [vote, referendums[index].unwrapOr(null)]
+        )
+        .filter((item): item is [VotingDirectVote, ReferendumInfo] =>
+          !!item[1] && isUndefined((item[1] as ReferendumInfoTo239).end) && item[0][1].isStandard
+        )
+        .map(([directVote, referendum]) =>
+          parseLock(api, directVote, referendum)
+        )
+    )
+  );
+}
+
+export function locks (api: ApiInterfaceRx): (accountId: string | AccountId) => Observable<DeriveDemocracyLock[]> {
+  return memo((accountId: string | AccountId): Observable<DeriveDemocracyLock[]> =>
+    api.query.democracy.votingOf(accountId).pipe(
+      switchMap((voting): Observable<DeriveDemocracyLock[]> =>
+        voting.isDirect
+          ? directLocks(api, voting.asDirect)
+          : of([])
+      )
+    )
+  );
+}

packages/api-derive/src/democracy/nextExternal.ts

@@ -0,0 +1,40 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { Hash, VoteThreshold } from '@polkadot/types/interfaces';
+import { ITuple } from '@polkadot/types/types';
+import { DeriveProposalExternal } from '../types';
+
+import { Observable, of } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { Option } from '@polkadot/types';
+
+import { memo } from '../util';
+
+function withImage (api: ApiInterfaceRx, nextOpt: Option<ITuple<[Hash, VoteThreshold]>>): Observable<DeriveProposalExternal | null> {
+  if (nextOpt.isNone) {
+    return of(null);
+  }
+
+  const [imageHash, threshold] = nextOpt.unwrap();
+
+  return api.derive.democracy.preimage(imageHash).pipe(
+    map((image): DeriveProposalExternal => ({
+      image,
+      imageHash,
+      threshold
+    }))
+  );
+}
+
+export function nextExternal (api: ApiInterfaceRx): () => Observable<DeriveProposalExternal | null> {
+  return memo((): Observable<DeriveProposalExternal | null> =>
+    api.query.democracy?.nextExternal
+      ? api.query.democracy.nextExternal<Option<ITuple<[Hash, VoteThreshold]>>>().pipe(
+        switchMap((nextOpt) => withImage(api, nextOpt))
+      )
+      : of(null)
+  );
+}

packages/api-derive/src/democracy/preimage.ts

@@ -0,0 +1,25 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { AccountId, Balance, BlockNumber, Hash } from '@polkadot/types/interfaces';
+import { ITuple } from '@polkadot/types/types';
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { DeriveProposalImage } from '../types';
+
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { Bytes, Option } from '@polkadot/types';
+
+import { memo } from '../util';
+import { parseImage } from './util';
+
+type PreImage = Option<ITuple<[Bytes, AccountId, Balance, BlockNumber]>>;
+
+export function preimage (api: ApiInterfaceRx): (hash: Hash) => Observable<DeriveProposalImage | undefined> {
+  return memo((hash: Hash): Observable<DeriveProposalImage | undefined> =>
+    api.query.democracy.preimages<PreImage>(hash).pipe(
+      map((imageOpt) => parseImage(api, imageOpt))
+    )
+  );
+}

packages/api-derive/src/democracy/preimages.ts

@@ -0,0 +1,27 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { AccountId, Balance, BlockNumber, Hash } from '@polkadot/types/interfaces';
+import { ITuple } from '@polkadot/types/types';
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { DeriveProposalImage } from '../types';
+
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { Bytes, Option } from '@polkadot/types';
+
+import { memo } from '../util';
+import { parseImage } from './util';
+
+type PreImage = Option<ITuple<[Bytes, AccountId, Balance, BlockNumber]>>;
+
+export function preimages (api: ApiInterfaceRx): (hashes: Hash[]) => Observable<(DeriveProposalImage | undefined)[]> {
+  return memo((hashes: Hash[]): Observable<(DeriveProposalImage | undefined)[]> =>
+    api.query.democracy.preimages.multi<PreImage>(hashes).pipe(
+      map((images): (DeriveProposalImage | undefined)[] =>
+        images.map((imageOpt) => parseImage(api, imageOpt))
+      )
+    )
+  );
+}

packages/api-derive/src/democracy/proposals.ts

@@ -2,61 +2,49 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import { AccountId, Balance, BlockNumber, Hash, PropIndex, Proposal } from '@polkadot/types/interfaces';
+import { AccountId, Balance, Hash, PropIndex } from '@polkadot/types/interfaces';
 import { ITuple } from '@polkadot/types/types';
-import { DeriveProposal } from '../types';
+import { DeriveProposalImage, DeriveProposal } from '../types';
 
 import { Observable, combineLatest, of } from 'rxjs';
 import { map, switchMap } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
-import { Bytes, Option, Vec } from '@polkadot/types';
+import { Option, Vec } from '@polkadot/types';
+import { isFunction } from '@polkadot/util';
 
 import { memo } from '../util';
 
-export type PreImage = Option<ITuple<[Bytes, AccountId, Balance, BlockNumber]>>;
-
-type Depositors = Option<ITuple<[Balance, Vec<AccountId>]>>;
+type DepositorsNew = Option<ITuple<[Vec<AccountId>, Balance]>>;
+type DepositorsOld = Option<ITuple<[Balance, Vec<AccountId>]>>;
+type Depositors = DepositorsNew | DepositorsOld;
 type Proposals = Vec<ITuple<[PropIndex, Hash, AccountId]>>;
+type Result = [Proposals, (DeriveProposalImage | undefined)[], Depositors[]];
 
-interface Result {
-  depositors: Depositors[];
-  preimages: PreImage[];
-  proposals: Proposals;
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+function isNewDepositors (depositors: ITuple<[Vec<AccountId>, Balance]> | ITuple<[Balance, Vec<AccountId>]>): depositors is ITuple<[Vec<AccountId>, Balance]> {
+  // Detect balance...
+  // eslint-disable-next-line @typescript-eslint/unbound-method
+  return isFunction((depositors[1] as Balance).mul);
 }
 
-function parse (api: ApiInterfaceRx, { depositors, proposals, preimages }: Result): DeriveProposal[] {
+function parse ([proposals, images, optDepositors]: Result): DeriveProposal[] {
   return proposals
     .filter(([, , proposer], index): boolean =>
-      !!(depositors[index]?.isSome) && !proposer.isEmpty
+      !!(optDepositors[index]?.isSome) && !proposer.isEmpty
     )
-    .map(([propIndex, hash, proposer], index): DeriveProposal => {
-      const preimage = preimages[index].unwrapOr(null);
-      const depositor = depositors[index].unwrap();
-      let proposal: undefined | Proposal;
-
-      // we could end up in a situation where the proposal is non-decodable, e.g. after an upgrade
-      if (preimage) {
-        try {
-          proposal = api.registry.createType('Proposal', preimage[0].toU8a(true));
-        } catch (error) {
-          console.error(error);
-        }
-      }
+    .map(([index, imageHash, proposer], proposalIndex): DeriveProposal => {
+      const depositors = optDepositors[proposalIndex].unwrap();
 
       return {
-        balance: depositor[0],
-        hash,
-        index: propIndex,
-        preimage: preimage
-          ? {
-            at: preimage[3],
-            balance: preimage[2],
-            proposer: preimage[1]
-          }
-          : undefined,
-        proposal,
-        proposer,
-        seconds: depositor[1]
+        ...(
+          isNewDepositors(depositors)
+            ? { balance: depositors[1], seconds: depositors[0] }
+            : { balance: depositors[0], seconds: depositors[1] }
+        ),
+        image: images[proposalIndex],
+        imageHash,
+        index,
+        proposer
       };
     });
 }
@@ -68,16 +56,14 @@ export function proposals (api: ApiInterfaceRx): () => Observable<DeriveProposal
         switchMap((proposals) =>
           combineLatest([
             of(proposals),
-            api.query.democracy.preimages.multi<PreImage>(
+            api.derive.democracy.preimages(
               proposals.map(([, hash]): Hash => hash)),
             api.query.democracy.depositOf.multi<Depositors>(
               proposals.map(([index]): PropIndex => index))
           ])
         ),
-        map(([proposals, preimages, depositors]): DeriveProposal[] =>
-          parse(api, { depositors, proposals, preimages })
-        )
+        map(parse)
       )
-      : of([] as DeriveProposal[])
+      : of([])
   );
 }

packages/api-derive/src/democracy/referendumIds.ts

@@ -0,0 +1,30 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { ReferendumIndex } from '@polkadot/types/interfaces';
+
+import BN from 'bn.js';
+import { Observable, of } from 'rxjs';
+import { map } from 'rxjs/operators';
+
+import { memo } from '../util';
+
+export function referendumIds (api: ApiInterfaceRx): () => Observable<BN[]> {
+  return memo((): Observable<BN[]> =>
+    api.query.democracy?.lowestUnbaked
+      ? api.queryMulti<[ReferendumIndex, ReferendumIndex]>([
+        api.query.democracy.lowestUnbaked,
+        api.query.democracy.referendumCount
+      ]).pipe(
+        map(([first, total]): BN[] =>
+          total.gt(first)
+            // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+            ? [...Array(total.sub(first).toNumber())].map((_, i): BN => first.addn(i))
+            : []
+        )
+      )
+      : of([])
+  );
+}

packages/api-derive/src/democracy/referendumInfo.ts

@@ -1,80 +0,0 @@
-// Copyright 2017-2020 @polkadot/api-derive authors & contributors
-// This software may be modified and distributed under the terms
-// of the Apache-2.0 license. See the LICENSE file for details.
-
-import { ReferendumInfo, ReferendumInfoTo239, ReferendumStatus } from '@polkadot/types/interfaces';
-import { DerivedReferendum } from '../types';
-import { PreImage } from './proposals';
-
-import BN from 'bn.js';
-import { Observable, of } from 'rxjs';
-import { map, switchMap } from 'rxjs/operators';
-import { ApiInterfaceRx } from '@polkadot/api/types';
-import { Option } from '@polkadot/types';
-
-import { memo } from '../util';
-
-function isOld (info: ReferendumInfo | ReferendumInfoTo239): info is ReferendumInfoTo239 {
-  return !!(info as ReferendumInfoTo239).proposalHash;
-}
-
-function getStatus (info: Option<ReferendumInfo | ReferendumInfoTo239>): ReferendumStatus | ReferendumInfoTo239 | null {
-  if (info.isNone) {
-    return null;
-  }
-
-  const unwrapped = info.unwrap();
-
-  if (isOld(unwrapped)) {
-    return unwrapped;
-  } else if (unwrapped.isOngoing) {
-    return unwrapped.asOngoing;
-  }
-
-  // done, we don't include it here... only currently active
-  return null;
-}
-
-function constructInfo (api: ApiInterfaceRx, index: BN | number, status: ReferendumStatus | ReferendumInfoTo239, _preimage?: PreImage): DerivedReferendum | null {
-  const preImage = _preimage?.isSome
-    ? _preimage.unwrap()
-    : null;
-
-  return {
-    index: api.registry.createType('PropIndex', index),
-    hash: status.proposalHash,
-    proposal: preImage
-      ? api.registry.createType('Proposal', preImage[0].toU8a(true))
-      : undefined,
-    preimage: preImage
-      ? {
-        at: preImage[3],
-        balance: preImage[2],
-        proposer: preImage[1]
-      }
-      : undefined,
-    status
-  };
-}
-
-export function retrieveInfo (api: ApiInterfaceRx, index: BN | number, info: Option<ReferendumInfo | ReferendumInfoTo239>): Observable<DerivedReferendum | null> {
-  const status = getStatus(info);
-
-  return status
-    ? api.query.democracy.preimages(status.proposalHash).pipe(
-      map((preimage?: PreImage): DerivedReferendum | null =>
-        constructInfo(api, index, status, preimage)
-      )
-    )
-    : of(null);
-}
-
-export function referendumInfo (api: ApiInterfaceRx): (index: BN | number) => Observable<DerivedReferendum | null> {
-  return memo((index: BN | number): Observable<DerivedReferendum | null> =>
-    api.query.democracy.referendumInfoOf<Option<ReferendumInfo | ReferendumInfoTo239>>(index).pipe(
-      switchMap((info): Observable<DerivedReferendum | null> =>
-        retrieveInfo(api, index, info)
-      )
-    )
-  );
-}

packages/api-derive/src/democracy/referendumInfos.ts

@@ -1,35 +0,0 @@
-// Copyright 2017-2020 @polkadot/api-derive authors & contributors
-// This software may be modified and distributed under the terms
-// of the Apache-2.0 license. See the LICENSE file for details.
-
-import { ReferendumInfo } from '@polkadot/types/interfaces/democracy';
-import { DerivedReferendum } from '../types';
-
-import BN from 'bn.js';
-import { Observable, combineLatest, of } from 'rxjs';
-import { map, switchMap } from 'rxjs/operators';
-import { ApiInterfaceRx } from '@polkadot/api/types';
-import { Option } from '@polkadot/types';
-
-import { memo } from '../util';
-import { retrieveInfo } from './referendumInfo';
-
-export function referendumInfos (api: ApiInterfaceRx): (ids?: (BN | number)[]) => Observable<DerivedReferendum[]> {
-  return memo((ids: (BN | number)[] = []): Observable<DerivedReferendum[]> =>
-    (
-      !ids?.length
-        ? of([] as Option<ReferendumInfo>[])
-        : api.query.democracy.referendumInfoOf.multi<Option<ReferendumInfo>>(ids)
-    ).pipe(
-      switchMap((infos): Observable<(DerivedReferendum | null)[]> =>
-        combineLatest(
-          ids.map((id, index): Observable<DerivedReferendum | null> =>
-            retrieveInfo(api, id, infos[index])
-          )
-        )
-      ),
-      map((infos): DerivedReferendum[] =>
-        infos.filter((referendum): referendum is DerivedReferendum => !!referendum)
-      )
-    ));
-}

packages/api-derive/src/democracy/referendumVotesFor.ts

@@ -1,34 +0,0 @@
-// Copyright 2017-2020 @polkadot/api-derive authors & contributors
-// This software may be modified and distributed under the terms
-// of the Apache-2.0 license. See the LICENSE file for details.
-
-import { AccountId, Vote } from '@polkadot/types/interfaces';
-
-import BN from 'bn.js';
-import { Observable, combineLatest, of } from 'rxjs';
-import { map, switchMap } from 'rxjs/operators';
-import { ApiInterfaceRx } from '@polkadot/api/types';
-import { Vec } from '@polkadot/types';
-
-import { DerivedBalancesAccount, DerivedReferendumVote } from '../types';
-import { memo } from '../util';
-
-export function referendumVotesFor (api: ApiInterfaceRx): (referendumId: BN | number) => Observable<DerivedReferendumVote[]> {
-  return memo((referendumId: BN | number): Observable<DerivedReferendumVote[]> =>
-    api.query.democracy.votersFor<Vec<AccountId>>(referendumId).pipe(
-      switchMap((votersFor): Observable<[Vec<AccountId>, Vote[], DerivedBalancesAccount[]]> =>
-        combineLatest([
-          of(votersFor),
-          api.derive.democracy.votes(referendumId, votersFor),
-          api.derive.balances.votingBalances(votersFor)
-        ])
-      ),
-      map(([votersFor, votes, balances]): DerivedReferendumVote[] =>
-        votersFor.map((accountId, index): DerivedReferendumVote => ({
-          accountId,
-          balance: balances[index].votingBalance || api.registry.createType('Balance'),
-          vote: votes[index] || api.registry.createType('Vote')
-        } as DerivedReferendumVote))
-      )
-    ));
-}

packages/api-derive/src/democracy/referendums.ts

@@ -2,33 +2,29 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import { ReferendumIndex } from '@polkadot/types/interfaces/democracy';
-import { DerivedReferendum } from '../types';
-
-import BN from 'bn.js';
-import { Observable, of } from 'rxjs';
-import { switchMap } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
+import { DeriveReferendumExt } from '../types';
+
+import { Observable, combineLatest, of } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
 
 import { memo } from '../util';
 
-export function referendums (api: ApiInterfaceRx): () => Observable<DerivedReferendum[]> {
-  return memo((): Observable<DerivedReferendum[]> =>
-    api.query.democracy?.lowestUnbaked
-      ? api.queryMulti<[ReferendumIndex, ReferendumIndex]>([
-        api.query.democracy.lowestUnbaked,
-        api.query.democracy.referendumCount
-      ]).pipe(
-        switchMap(([earliest, referendumCount]): Observable<DerivedReferendum[]> =>
-          referendumCount?.gt(earliest) && referendumCount?.gtn(0)
-            ? api.derive.democracy.referendumInfos(
-              [...Array(referendumCount.sub(earliest).toNumber())].map((_, i): BN =>
-                earliest.addn(i)
-              )
-            )
-            : of([])
-        )
+export function referendums (api: ApiInterfaceRx): () => Observable<DeriveReferendumExt[]> {
+  return memo((): Observable<DeriveReferendumExt[]> =>
+    api.derive.democracy.referendumsActive().pipe(
+      switchMap((referendums) =>
+        combineLatest([
+          of(referendums),
+          api.derive.democracy._referendumsVotes(referendums)
+        ])
+      ),
+      map(([referendums, votes]) =>
+        referendums.map((referendum, index): DeriveReferendumExt => ({
+          ...referendum,
+          ...votes[index]
+        }))
       )
-      : of([] as DerivedReferendum[])
+    )
   );
 }

packages/api-derive/src/democracy/referendumsActive.ts

@@ -0,0 +1,23 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { DeriveReferendum } from '../types';
+
+import { Observable, of } from 'rxjs';
+import { switchMap } from 'rxjs/operators';
+
+import { memo } from '../util';
+
+export function referendumsActive (api: ApiInterfaceRx): () => Observable<DeriveReferendum[]> {
+  return memo((): Observable<DeriveReferendum[]> =>
+    api.derive.democracy.referendumIds().pipe(
+      switchMap((ids): Observable<DeriveReferendum[]> =>
+        ids.length
+          ? api.derive.democracy.referendumsInfo(ids)
+          : of([])
+      )
+    )
+  );
+}

packages/api-derive/src/democracy/referendumsFinished.ts

@@ -0,0 +1,27 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { ReferendumInfo, ReferendumInfoFinished } from '@polkadot/types/interfaces';
+
+import { Observable } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
+import { Option } from '@polkadot/types';
+
+import { memo } from '../util';
+
+export function referendumsFinished (api: ApiInterfaceRx): () => Observable<ReferendumInfoFinished[]> {
+  return memo((): Observable<ReferendumInfoFinished[]> =>
+    api.derive.democracy.referendumIds().pipe(
+      switchMap((ids) => api.query.democracy.referendumInfoOf.multi<Option<ReferendumInfo>>(ids)),
+      map((infos): ReferendumInfoFinished[] =>
+        infos
+          .filter((optInfo) => optInfo.isSome)
+          .map((optInfo) => optInfo.unwrap())
+          .filter((info) => info.isFinished)
+          .map((info) => info.asFinished)
+      )
+    )
+  );
+}

packages/api-derive/src/democracy/referendumsInfo.ts

@@ -0,0 +1,156 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { AccountId, ReferendumInfo, ReferendumInfoTo239, Vote, Voting, VotingDirectVote, VotingDelegating } from '@polkadot/types/interfaces';
+import { DeriveBalancesAccount, DeriveReferendum, DeriveReferendumVote, DeriveReferendumVotes } from '../types';
+
+import BN from 'bn.js';
+import { Observable, of, combineLatest } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
+import { Option, Vec } from '@polkadot/types';
+import { isFunction } from '@polkadot/util';
+
+import { memo } from '../util';
+import { calcVotes, getStatus, parseImage } from './util';
+
+function votesPrev (api: ApiInterfaceRx, referendumId: BN): Observable<DeriveReferendumVote[]> {
+  return api.query.democracy.votersFor<Vec<AccountId>>(referendumId).pipe(
+    switchMap((votersFor): Observable<[Vec<AccountId>, Vote[], DeriveBalancesAccount[]]> =>
+      combineLatest([
+        of(votersFor),
+        votersFor.length
+          ? api.query.democracy.voteOf.multi<Vote>(
+            votersFor.map((accountId): [BN | number, AccountId] =>
+              [referendumId, accountId]
+            )
+          )
+          : of([]),
+        api.derive.balances.votingBalances(votersFor)
+      ])
+    ),
+    map(([votersFor, votes, balances]): DeriveReferendumVote[] =>
+      votersFor.map((accountId, index): DeriveReferendumVote => ({
+        accountId,
+        balance: balances[index].votingBalance || api.registry.createType('Balance'),
+        isDelegating: false,
+        vote: votes[index] || api.registry.createType('Vote')
+      }))
+    )
+  );
+}
+
+function votesCurr (api: ApiInterfaceRx, referendumId: BN): Observable<DeriveReferendumVote[]> {
+  return api.query.democracy.votingOf.entries<Voting>().pipe(
+    map((allVoting): DeriveReferendumVote[] => {
+      const mapped = allVoting.map(([key, voting]): [AccountId, Voting] => [key.args[0] as AccountId, voting]);
+      const votes = mapped
+        .filter(([, voting]) => voting.isDirect)
+        .map(([accountId, voting]): [AccountId, VotingDirectVote[]] => [
+          accountId,
+          voting.asDirect.votes.filter(([idx]) => idx.eq(referendumId))
+        ])
+        .filter(([, directVotes]) => !!directVotes.length)
+        .reduce((result: DeriveReferendumVote[], [accountId, votes]) =>
+          // FIXME We are ignoring split votes
+          votes.reduce((result: DeriveReferendumVote[], [, vote]): DeriveReferendumVote[] => {
+            if (vote.isStandard) {
+              result.push({
+                accountId,
+                isDelegating: false,
+                ...vote.asStandard
+              });
+            }
+
+            return result;
+          }, result), []
+        );
+      const delegations = mapped
+        .filter(([, voting]) => voting.isDelegating)
+        .map(([accountId, voting]): [AccountId, VotingDelegating] => [accountId, voting.asDelegating]);
+
+      // add delegations
+      delegations.forEach(([accountId, { balance, conviction, target }]): void => {
+        // Are we delegating to a delegator
+        const toDelegator = delegations.find(([accountId]) => accountId.eq(target));
+        const to = votes.find(({ accountId }) => accountId.eq(toDelegator ? toDelegator[0] : target));
+
+        // this delegation has a target
+        if (to) {
+          votes.push({
+            accountId,
+            balance,
+            isDelegating: true,
+            vote: api.registry.createType('Vote', { aye: to.vote.isAye, conviction })
+          });
+        }
+      });
+
+      return votes;
+    })
+  );
+}
+
+export function _referendumVotes (api: ApiInterfaceRx): (referendum: DeriveReferendum) => Observable<DeriveReferendumVotes> {
+  return memo((referendum: DeriveReferendum): Observable<DeriveReferendumVotes> =>
+    combineLatest([
+      api.derive.democracy.sqrtElectorate(),
+      isFunction(api.query.democracy.votingOf)
+        ? votesCurr(api, referendum.index)
+        : votesPrev(api, referendum.index)
+    ]).pipe(
+      map(([sqrtElectorate, votes]) =>
+        calcVotes(sqrtElectorate, referendum, votes)
+      )
+    )
+  );
+}
+
+export function _referendumsVotes (api: ApiInterfaceRx): (referendums: DeriveReferendum[]) => Observable<DeriveReferendumVotes[]> {
+  return memo((referendums: DeriveReferendum[]): Observable<DeriveReferendumVotes[]> =>
+    referendums.length
+      ? combineLatest(
+        referendums.map((referendum): Observable<DeriveReferendumVotes> =>
+          api.derive.democracy._referendumVotes(referendum)
+        )
+      )
+      : of([])
+  );
+}
+
+export function _referendumInfo (api: ApiInterfaceRx): (index: BN, info: Option<ReferendumInfo | ReferendumInfoTo239>) => Observable<DeriveReferendum | null> {
+  return memo((index: BN, info: Option<ReferendumInfo | ReferendumInfoTo239>): Observable<DeriveReferendum | null> => {
+    const status = getStatus(info);
+
+    return status
+      ? api.query.democracy.preimages(status.proposalHash).pipe(
+        map((preimage): DeriveReferendum => ({
+          image: parseImage(api, preimage),
+          imageHash: status.proposalHash,
+          index: api.registry.createType('ReferendumIndex', index),
+          status
+        }))
+      )
+      : of(null);
+  });
+}
+
+export function referendumsInfo (api: ApiInterfaceRx): (ids: BN[]) => Observable<DeriveReferendum[]> {
+  return memo((ids: BN[]): Observable<DeriveReferendum[]> =>
+    ids.length
+      ? api.query.democracy.referendumInfoOf.multi<Option<ReferendumInfo>>(ids).pipe(
+        switchMap((infos): Observable<(DeriveReferendum | null)[]> =>
+          combineLatest(
+            ids.map((id, index): Observable<DeriveReferendum | null> =>
+              api.derive.democracy._referendumInfo(id, infos[index])
+            )
+          )
+        ),
+        map((infos) =>
+          infos.filter((referendum): referendum is DeriveReferendum => !!referendum)
+        )
+      )
+      : of([])
+  );
+}

packages/api-derive/src/democracy/sqrtElectorate.ts

@@ -0,0 +1,22 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { ApiInterfaceRx } from '@polkadot/api/types';
+
+import BN from 'bn.js';
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { bnSqrt } from '@polkadot/util';
+
+import { memo } from '../util';
+
+export function sqrtElectorate (api: ApiInterfaceRx): () => Observable<BN> {
+  return memo((): Observable<BN> =>
+    api.query.balances.totalIssuance().pipe(
+      map((totalIssuance) =>
+        bnSqrt(totalIssuance)
+      )
+    )
+  );
+}

packages/api-derive/src/democracy/types.ts

@@ -0,0 +1,78 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import type BN from 'bn.js';
+import { AccountId, Balance, BlockNumber, Hash, Proposal, PropIndex, ReferendumInfoTo239, ReferendumStatus, Vote, ReferendumIndex, VoteThreshold } from '@polkadot/types/interfaces';
+
+import { Vec } from '@polkadot/types';
+
+export interface DeriveDemocracyLock {
+  balance: Balance;
+  isFinished: boolean;
+  referendumId: ReferendumIndex;
+  unlockAt: BN;
+  vote: Vote;
+}
+
+export interface DeriveDispatch {
+  at: BlockNumber;
+  index: ReferendumIndex;
+  imageHash: Hash;
+  image?: DeriveProposalImage;
+}
+
+export interface DeriveProposalImage {
+  at: BlockNumber;
+  balance: Balance;
+  proposal?: Proposal;
+  proposer: AccountId;
+}
+
+export interface DeriveProposal {
+  balance?: Balance;
+  index: PropIndex;
+  image?: DeriveProposalImage;
+  imageHash: Hash;
+  proposer: AccountId;
+  seconds: Vec<AccountId>;
+}
+
+export interface DeriveProposalExternal {
+  image?: DeriveProposalImage;
+  imageHash: Hash;
+  threshold: VoteThreshold;
+}
+
+export interface DeriveReferendum {
+  index: ReferendumIndex;
+  image?: DeriveProposalImage;
+  imageHash: Hash;
+  status: ReferendumStatus | ReferendumInfoTo239;
+}
+
+export interface DeriveReferendumVote {
+  accountId: AccountId;
+  balance: Balance;
+  isDelegating: boolean;
+  vote: Vote;
+}
+
+export interface DeriveReferendumVoteState {
+  allAye: DeriveReferendumVote[];
+  allNay: DeriveReferendumVote[];
+  voteCount: number;
+  voteCountAye: number;
+  voteCountNay: number;
+  votedAye: BN;
+  votedNay: BN;
+  votedTotal: BN;
+}
+
+export interface DeriveReferendumVotes extends DeriveReferendumVoteState {
+  isPassing: boolean;
+  votes: DeriveReferendumVote[];
+}
+
+export interface DeriveReferendumExt extends DeriveReferendum, DeriveReferendumVotes {
+}

packages/api-derive/src/democracy/util.ts

@@ -0,0 +1,191 @@
+// Copyright 2017-2020 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { ApiInterfaceRx } from '@polkadot/api/types';
+import { AccountId, Balance, BlockNumber, PreimageStatus, Proposal, ReferendumInfo, ReferendumInfoTo239, ReferendumStatus, Tally, VoteThreshold } from '@polkadot/types/interfaces';
+import { ITuple } from '@polkadot/types/types';
+import { DeriveProposalImage, DeriveReferendum, DeriveReferendumVote, DeriveReferendumVotes, DeriveReferendumVoteState } from '../types';
+
+import BN from 'bn.js';
+import { Bytes, Option } from '@polkadot/types';
+import { bnSqrt } from '@polkadot/util';
+
+type PreimageInfo = [Bytes, AccountId, Balance, BlockNumber];
+type OldPreimage = ITuple<PreimageInfo>;
+
+interface ApproxState {
+  votedAye: BN;
+  votedNay: BN;
+  votedTotal: BN;
+}
+
+function isOldInfo (info: ReferendumInfo | ReferendumInfoTo239): info is ReferendumInfoTo239 {
+  return !!(info as ReferendumInfoTo239).proposalHash;
+}
+
+function isCurrentStatus (status: ReferendumStatus | ReferendumInfoTo239): status is ReferendumStatus {
+  return !!(status as ReferendumStatus).tally;
+}
+
+function isCurrentPreimage (api: ApiInterfaceRx, imageOpt: Option<OldPreimage> | Option<PreimageStatus>): imageOpt is Option<PreimageStatus> {
+  return !!imageOpt && !api.query.democracy.dispatchQueue;
+}
+
+export function compareRationals (n1: BN, d1: BN, n2: BN, d2: BN): boolean {
+  while (true) {
+    const q1 = n1.div(d1);
+    const q2 = n2.div(d2);
+
+    if (q1.lt(q2)) {
+      return true;
+    } else if (q2.lt(q1)) {
+      return false;
+    }
+
+    const r1 = n1.mod(d1);
+    const r2 = n2.mod(d2);
+
+    if (r2.isZero()) {
+      return false;
+    } else if (r1.isZero()) {
+      return true;
+    }
+
+    n1 = d2;
+    n2 = d1;
+    d1 = r2;
+    d2 = r1;
+  }
+}
+
+export function calcPassing (threshold: VoteThreshold, sqrtElectorate: BN, { votedAye, votedNay, votedTotal }: ApproxState): boolean {
+  const sqrtVoters = bnSqrt(votedTotal);
+
+  return sqrtVoters.isZero()
+    ? false
+    : threshold.isSimplemajority
+      ? votedAye.gt(votedNay)
+      : threshold.isSupermajorityapproval
+        ? compareRationals(votedNay, sqrtVoters, votedAye, sqrtElectorate)
+        : compareRationals(votedNay, sqrtElectorate, votedAye, sqrtVoters);
+}
+
+function calcVotesPrev (votesFor: DeriveReferendumVote[]): DeriveReferendumVoteState {
+  return votesFor.reduce((state: DeriveReferendumVoteState, derived): DeriveReferendumVoteState => {
+    const { balance, vote } = derived;
+    const isDefault = vote.conviction.index === 0;
+    const counted = balance
+      .muln(isDefault ? 1 : vote.conviction.index)
+      .divn(isDefault ? 10 : 1);
+
+    if (vote.isAye) {
+      state.allAye.push(derived);
+      state.voteCountAye++;
+      state.votedAye = state.votedAye.add(counted);
+    } else {
+      state.allNay.push(derived);
+      state.voteCountNay++;
+      state.votedNay = state.votedNay.add(counted);
+    }
+
+    state.voteCount++;
+    state.votedTotal = state.votedTotal.add(counted);
+
+    return state;
+  }, {
+    allAye: [],
+    allNay: [],
+    voteCount: 0,
+    voteCountAye: 0,
+    voteCountNay: 0,
+    votedAye: new BN(0),
+    votedNay: new BN(0),
+    votedTotal: new BN(0)
+  });
+}
+
+function calcVotesCurrent (tally: Tally, votes: DeriveReferendumVote[]): DeriveReferendumVoteState {
+  const allAye: DeriveReferendumVote[] = [];
+  const allNay: DeriveReferendumVote[] = [];
+
+  votes.forEach((derived): void => {
+    if (derived.vote.isAye) {
+      allAye.push(derived);
+    } else {
+      allNay.push(derived);
+    }
+  });
+
+  return {
+    allAye,
+    allNay,
+    voteCount: allAye.length + allNay.length,
+    voteCountAye: allAye.length,
+    voteCountNay: allNay.length,
+    votedAye: tally.ayes,
+    votedNay: tally.nays,
+    votedTotal: tally.turnout
+  };
+}
+
+export function calcVotes (sqrtElectorate: BN, referendum: DeriveReferendum, votes: DeriveReferendumVote[]): DeriveReferendumVotes {
+  const state = isCurrentStatus(referendum.status)
+    ? calcVotesCurrent(referendum.status.tally, votes)
+    : calcVotesPrev(votes);
+
+  return {
+    ...state,
+    isPassing: calcPassing(referendum.status.threshold, sqrtElectorate, state),
+    votes
+  };
+}
+
+export function getStatus (info: Option<ReferendumInfo | ReferendumInfoTo239>): ReferendumStatus | ReferendumInfoTo239 | null {
+  if (info.isNone) {
+    return null;
+  }
+
+  const unwrapped = info.unwrap();
+
+  if (isOldInfo(unwrapped)) {
+    return unwrapped;
+  } else if (unwrapped.isOngoing) {
+    return unwrapped.asOngoing;
+  }
+
+  // done, we don't include it here... only currently active
+  return null;
+}
+
+function constructProposal (api: ApiInterfaceRx, [bytes, proposer, balance, at]: PreimageInfo): DeriveProposalImage {
+  let proposal: Proposal | undefined;
+
+  try {
+    proposal = api.registry.createType('Proposal', bytes.toU8a(true));
+  } catch (error) {
+    console.error(error);
+  }
+
+  return { at, balance, proposal, proposer };
+}
+
+export function parseImage (api: ApiInterfaceRx, imageOpt: Option<OldPreimage> | Option<PreimageStatus>): DeriveProposalImage | undefined {
+  if (imageOpt.isNone) {
+    return;
+  }
+
+  if (isCurrentPreimage(api, imageOpt)) {
+    const status = imageOpt.unwrap();
+
+    if (status.isMissing) {
+      return;
+    }
+
+    const { data, deposit, provider, since } = status.asAvailable;
+
+    return constructProposal(api, [data, provider, deposit, since]);
+  }
+
+  return constructProposal(api, imageOpt.unwrap());
+}

packages/api-derive/src/democracy/votes.ts

@@ -1,23 +0,0 @@
-// Copyright 2017-2020 @polkadot/api-derive authors & contributors
-// This software may be modified and distributed under the terms
-// of the Apache-2.0 license. See the LICENSE file for details.
-
-import { AccountId, Vote } from '@polkadot/types/interfaces';
-
-import BN from 'bn.js';
-import { Observable, of } from 'rxjs';
-import { ApiInterfaceRx } from '@polkadot/api/types';
-
-import { memo } from '../util';
-
-export function votes (api: ApiInterfaceRx): (referendumId: BN | number, accountIds?: AccountId[]) => Observable<Vote[]> {
-  return memo((referendumId: BN | number, accountIds: AccountId[] = []): Observable<Vote[]> =>
-    !accountIds || !accountIds.length
-      ? of([] as Vote[])
-      : api.query.democracy.voteOf.multi<Vote>(
-        accountIds.map((accountId): [BN | number, AccountId] =>
-          [referendumId, accountId]
-        )
-      )
-  );
-}

packages/api-derive/src/elections/info.ts

@@ -10,14 +10,14 @@ import { map } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { Vec, u32 } from '@polkadot/types';
 
-import { DerivedElectionsInfo } from '../types';
+import { DeriveElectionsInfo } from '../types';
 import { memo } from '../util';
 
 function sortAccounts ([, balanceA]: ITuple<[AccountId, Balance]>, [, balanceB]: ITuple<[AccountId, Balance]>): number {
   return balanceB.cmp(balanceA);
 }
 
-function queryElections (api: ApiInterfaceRx): Observable<DerivedElectionsInfo> {
+function queryElections (api: ApiInterfaceRx): Observable<DeriveElectionsInfo> {
   const section = api.query.electionsPhragmen ? 'electionsPhragmen' : 'elections';
 
   return api.queryMulti<[Vec<AccountId>, Vec<AccountId>, Vec<ITuple<[AccountId, Balance]>>, Vec<ITuple<[AccountId, Balance]>>]>([
@@ -26,10 +26,10 @@ function queryElections (api: ApiInterfaceRx): Observable<DerivedElectionsInfo>
     api.query[section].members,
     api.query[section].runnersUp
   ]).pipe(
-    map(([councilMembers, candidates, members, runnersUp]): DerivedElectionsInfo => ({
-      candidates,
-      candidateCount: api.registry.createType('u32', candidates.length),
+    map(([councilMembers, candidates, members, runnersUp]): DeriveElectionsInfo => ({
       candidacyBond: api.consts[section].candidacyBond as Balance,
+      candidateCount: api.registry.createType('u32', candidates.length),
+      candidates,
       desiredSeats: api.consts[section].desiredMembers as u32,
       members: members.length
         ? members.sort(sortAccounts)
@@ -54,6 +54,6 @@ function queryElections (api: ApiInterfaceRx): Observable<DerivedElectionsInfo>
  * });
  * ```
  */
-export function info (api: ApiInterfaceRx): () => Observable<DerivedElectionsInfo> {
-  return memo((): Observable<DerivedElectionsInfo> => queryElections(api));
+export function info (api: ApiInterfaceRx): () => Observable<DeriveElectionsInfo> {
+  return memo((): Observable<DeriveElectionsInfo> => queryElections(api));
 }

packages/api-derive/src/imOnline/receivedHeartbeats.ts

@@ -3,7 +3,7 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import { AccountId } from '@polkadot/types/interfaces';
-import { DerivedHeartbeats } from '../types';
+import { DeriveHeartbeats } from '../types';
 
 import { Observable, of, combineLatest } from 'rxjs';
 import { map, switchMap } from 'rxjs/operators';
@@ -15,8 +15,8 @@ import { memo } from '../util';
 /**
  * @description Return a boolean array indicating whether the passed accounts had received heartbeats in the current session
  */
-export function receivedHeartbeats (api: ApiInterfaceRx): () => Observable<DerivedHeartbeats> {
-  return memo((): Observable<DerivedHeartbeats> =>
+export function receivedHeartbeats (api: ApiInterfaceRx): () => Observable<DeriveHeartbeats> {
+  return memo((): Observable<DeriveHeartbeats> =>
     api.query.imOnline?.receivedHeartbeats
       ? api.derive.staking.overview().pipe(
         switchMap(({ currentIndex, validators }): Observable<[AccountId[], Option<Bytes>[], u32[]]> =>
@@ -28,8 +28,8 @@ export function receivedHeartbeats (api: ApiInterfaceRx): () => Observable<Deriv
               validators.map((address) => [currentIndex, address]))
           ])
         ),
-        map(([validators, heartbeats, numBlocks]): DerivedHeartbeats =>
-          validators.reduce((result: DerivedHeartbeats, validator, index): DerivedHeartbeats => ({
+        map(([validators, heartbeats, numBlocks]): DeriveHeartbeats =>
+          validators.reduce((result: DeriveHeartbeats, validator, index): DeriveHeartbeats => ({
             ...result,
             [validator.toString()]: {
               blockCount: numBlocks[index],

packages/api-derive/src/index.spec.ts

@@ -2,6 +2,10 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
+/* eslint-disable @typescript-eslint/no-unsafe-return */
+/* eslint-disable @typescript-eslint/no-unsafe-call */
+/* eslint-disable @typescript-eslint/restrict-template-expressions */
+
 import { Observable, from } from 'rxjs';
 import ApiRx from '@polkadot/api/rx/Api';
 import MockProvider from '@polkadot/rpc-provider/mock';
@@ -33,7 +37,7 @@ describe('derive', (): void => {
     const api = new ApiRx({ provider: new MockProvider(registry), registry });
 
     beforeAll((done): void => {
-      api.isReady.subscribe((): void => done());
+      api.isReady.subscribe(() => done());
     });
 
     testFunction(api)('accounts', 'idAndIndex', []);
@@ -49,10 +53,8 @@ describe('derive', (): void => {
     testFunction(api)('chain', 'bestNumber', []);
     testFunction(api)('chain', 'bestNumberFinalized', []);
 
-    testFunction(api)('democracy', 'referendumInfos', []);
+    testFunction(api)('democracy', 'proposals', []);
     testFunction(api)('democracy', 'referendums', []);
-    testFunction(api)('democracy', 'referendumVotesFor', []);
-    testFunction(api)('democracy', 'votes', []);
 
     testFunction(api)('elections', 'info', []);
 

packages/api-derive/src/index.ts

@@ -21,10 +21,11 @@ import * as society from './society';
 import * as staking from './staking';
 import * as technicalCommittee from './technicalCommittee';
 import * as treasury from './treasury';
+import * as tx from './tx';
 
 export * from './type';
 
-export const derive = { accounts, balances, chain, contracts, council, democracy, elections, imOnline, parachains, session, society, staking, technicalCommittee, treasury };
+export const derive = { accounts, balances, chain, contracts, council, democracy, elections, imOnline, parachains, session, society, staking, technicalCommittee, treasury, tx };
 
 type DeriveSection<Section> = {
   [Method in keyof Section]: Section[Method] extends AnyFunction
@@ -75,8 +76,11 @@ function injectFunctions<AllSections> (api: ApiInterfaceRx, allSections: AllSect
         .reduce((sectionAcc, _methodName): DeriveSection<typeof section> => {
           const methodName = _methodName as keyof typeof section;
           // Not sure what to do here, casting as any. Though the final types are good
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-call
           const method = (section[methodName] as any)(api);
+
           // idem
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-member-access
           (sectionAcc as any)[methodName] = method;
 
           return sectionAcc;

packages/api-derive/src/parachains/info.ts

@@ -44,6 +44,7 @@ function parseActive (id: ParaId, active: Active): DeriveParachainActive | null
       )
     };
   }
+
   return null;
 }