[CI Skip] 2.7.1

skip-checks: true

.123trigger

@@ -1 +1,2 @@
-4
+5
+2.6.2

.github/workflows/pr-any.yml

@@ -2,112 +2,20 @@ name: PR
 on: [pull_request]
 
 jobs:
-  lint:
-    name: Linting
-    runs-on: ubuntu-latest
+  pr:
     strategy:
       matrix:
-        node-version: [12.x]
-    steps:
-    - uses: actions/checkout@v1
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Config yarn cache
-      id: yarn-cache-dir-path
-      run: echo "::set-output name=dir::$(yarn cache dir)"
-    - uses: actions/cache@v1
-      id: yarn-cache
-      with:
-        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
-    - name: lint
-      run: |
-        yarn install --frozen-lockfile
-        yarn lint
-
-  test:
-    name: Testing
+        step: ['lint', 'test', 'build', 'docs']
+    name: ${{ matrix.step }}
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [12.x]
     steps:
     - uses: actions/checkout@v1
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+    - uses: actions/setup-node@v1
       with:
-        node-version: ${{ matrix.node-version }}
-    - name: Config yarn cache
-      id: yarn-cache-dir-path
-      run: echo "::set-output name=dir::$(yarn cache dir)"
-    - uses: actions/cache@v1
-      id: yarn-cache
-      with:
-        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
-    - name: test
+        node-version: '12.x'
+    - name: ${{ matrix.step }}
       env:
         CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
       run: |
-        yarn install --frozen-lockfile
-        yarn test
-
-  build_code:
-    name: Build Code
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [12.x]
-    steps:
-    - uses: actions/checkout@v1
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Config yarn cache
-      id: yarn-cache-dir-path
-      run: echo "::set-output name=dir::$(yarn cache dir)"
-    - uses: actions/cache@v1
-      id: yarn-cache
-      with:
-        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
-    - name: build
-      run: |
-        yarn install --frozen-lockfile
-        yarn build
-
-  build_docs:
-    name: Build Docs
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [12.x]
-    steps:
-    - uses: actions/checkout@v1
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Config yarn cache
-      id: yarn-cache-dir-path
-      run: echo "::set-output name=dir::$(yarn cache dir)"
-    - uses: actions/cache@v1
-      id: yarn-cache
-      with:
-        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
-    - name: build
-      run: |
-        yarn install --frozen-lockfile
-        yarn docs
+        yarn install --immutable | grep -v 'YN0013'
+        yarn ${{ matrix.step }}

.github/workflows/push-master.yml

@@ -5,82 +5,36 @@ on:
       - master
 
 jobs:
-  build_code:
-    name: Build Code
-    if: "! contains(github.event.head_commit.message, '[CI Skip]')"
-    runs-on: ubuntu-latest
+  master:
     strategy:
       matrix:
-        node-version: [12.x]
+        step: ['build:release', 'docs:release']
+    name: ${{ matrix.step }}
+    if: "! contains(github.event.head_commit.message, '[CI Skip]')"
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
       with:
         token: ${{ secrets.GH_PAT }}
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+    - uses: actions/setup-node@v1
       with:
-        node-version: ${{ matrix.node-version }}
-    - name: Config yarn cache
-      id: yarn-cache-dir-path
-      run: echo "::set-output name=dir::$(yarn cache dir)"
-    - uses: actions/cache@v1
-      id: yarn-cache
-      with:
-        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
-    - name: build
+        node-version: '12.x'
+    - name: ${{ matrix.step }}
       env:
         CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
+        GH_PAGES_SRC: build-docs
         GH_PAT: ${{ secrets.GH_PAT }}
         GH_TOKEN: ${{ secrets.GH_PAT }}
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
       run: |
-        yarn install --frozen-lockfile
-        yarn polkadot-ci-ghact-build
-
-  build_docs:
-    name: Build Docs
-    if: "! contains(github.event.head_commit.message, '[CI Skip]')"
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [12.x]
-    steps:
-    - uses: actions/checkout@v1
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Config yarn cache
-      id: yarn-cache-dir-path
-      run: echo "::set-output name=dir::$(yarn cache dir)"
-    - uses: actions/cache@v1
-      id: yarn-cache
-      with:
-        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
-    - name: build
-      env:
-        GH_PAT: ${{ secrets.GH_PAT }}
-        GH_TOKEN: ${{ secrets.GH_PAT }}
-        GH_PAGES_SRC: build-docs
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: |
-        yarn install --frozen-lockfile
-        yarn polkadot-ci-ghact-docs
+        yarn install --immutable | grep -v 'YN0013'
+        yarn ${{ matrix.step }}
 
   dummy:
     name: Dummy
     if: "contains(github.event.head_commit.message, '[CI Skip]')"
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [12.x]
     steps:
     - name: dummy
       run: |

.gitignore

@@ -12,10 +12,10 @@ tmp/
 .env.test.local
 .env.production.local
 .npmrc
+.yarn/*
+!.yarn/releases
+!.yarn/plugins
 .pnp.*
-.yarn/cache
-.yarn/unplugged
-.yarn/build-state.yml
 cc-test-reporter
 lerna-debug.log*
 npm-debug.log*

.yarnrc.yml

@@ -0,0 +1,11 @@
+enableImmutableInstalls: false
+
+enableProgressBars: false
+
+nodeLinker: node-modules
+
+plugins:
+  - path: .yarn/plugins/@yarnpkg/plugin-interactive-tools.js
+    spec: "@yarnpkg/plugin-interactive-tools"
+
+yarnPath: .yarn/releases/yarn-rc.js

CHANGELOG.md

@@ -1,3 +1,24 @@
+# 2.7.1 Mar 31, 2020
+
+- Add `bnSqrt` to calculate the integer sqrt via Newton iteration
+- Allow for optional wasm-crypto, specifically via `@polkadot/util-crypto/noWasm`
+- Misc. CI infrastructure cleanups
+
+# 2.6.1 Feb 29, 2020
+
+- **Breaking change** Following on the 2.0 release, `@polkadot/wasm` was updated to 1.1+. sr25510 now only verifies 0.8+ signatures, closing the loop on dropping Substrate 1.x-era support
+- Add `signatureVerify (message: Uint8Array | string, signature: Uint8Array | string, addressOrPublicKey: Uint8Array | string): VerifyResult` to verify any signature, regardless of type. Returns validity & detected crypto type.
+- Add `cryptoIsReady (): boolean` function to check status of initialization
+- Add `addressCheckChecksum (decoded: Uint8Array)` as an helper to extract and verify the ss58 checksum
+- Swap to yarn 2, allow use in yan 2 projects
+
+# 2.5.1 Feb 22, 2020
+
+- **Breaking change** (TypeScript only) The `*.d.ts` files now contain TypeScript 3.8 features, `#private`, which is not usable in older versions
+- Add `isBigInt(value)` to allow `BigInt` checks. Also add support in `bnToBn` as well as number conversion utils
+- Add `isChildClass(Parent, Child?)` to check if a class extends the parent, asserting Child is Parent
+- (internal) Use `#<field>` instead of `private _<field>` for private class variables
+
 # 2.4.1 Feb 18, 2020
 
 - Ensure that `formatBalance` does not apply unit overrides apply when no SI is applicable

lerna.json

@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "2.4.1"
+  "version": "2.7.1"
 }

package.json

@@ -1,18 +1,19 @@
 {
-  "version": "2.4.1",
+  "repository": "https://github.com/polkadot-js/common",
+  "author": "Jaco Greeff <jacogr@gmail.com>",
+  "license": "Apache-2",
   "private": true,
-  "engines": {
-    "yarn": "^1.10.1"
-  },
   "workspaces": [
     "packages/*"
   ],
   "resolutions": {
-    "typescript": "^3.7.5"
+    "typescript": "^3.8.3"
   },
   "scripts": {
     "build": "polkadot-dev-build-ts",
+    "build:release": "polkadot-ci-ghact-build",
     "docs": "polkadot-dev-build-docs",
+    "docs:release": "polkadot-ci-ghact-docs",
     "lint": "polkadot-dev-run-lint",
     "clean": "polkadot-dev-clean-build",
     "postinstall": "polkadot-dev-yarn-only",
@@ -20,8 +21,9 @@
     "test:one": "polkadot-dev-run-test"
   },
   "devDependencies": {
-    "@babel/core": "^7.8.4",
-    "@polkadot/dev": "^0.40.18",
-    "@polkadot/ts": "^0.2.3"
+    "@babel/core": "^7.9.0",
+    "@polkadot/dev": "^0.51.9",
+    "@polkadot/ts": "^0.3.14",
+    "@types/jest": "^25.1.4"
   }
 }

packages/keyring/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/keyring",
-  "version": "2.4.1",
+  "version": "2.7.1",
   "description": "Keyring management",
   "main": "index.js",
   "publishConfig": {
@@ -27,8 +27,8 @@
   },
   "homepage": "https://github.com/polkadot-js/common/tree/master/packages/keyring#readme",
   "dependencies": {
-    "@babel/runtime": "^7.8.4",
-    "@polkadot/util": "^2.4.1",
-    "@polkadot/util-crypto": "^2.4.1"
+    "@babel/runtime": "^7.9.2",
+    "@polkadot/util": "2.7.1",
+    "@polkadot/util-crypto": "2.7.1"
   }
 }

packages/keyring/src/index.ts

@@ -8,7 +8,7 @@ import { decodeAddress, encodeAddress, setSS58Format } from '@polkadot/util-cryp
 import Keyring from './keyring';
 
 // eslint-disable-next-line @typescript-eslint/no-var-requires
-detectPackage(require('./package.json'), __dirname);
+detectPackage(require('./package.json'), typeof __dirname !== 'undefined' && __dirname);
 
 export default Keyring;
 

packages/keyring/src/keyring.ts

@@ -29,11 +29,11 @@ import Pairs from './pairs';
  * an account may be obtained using `toJson` accompanied by the account passphrase.
  */
 export default class Keyring implements KeyringInstance {
-  private _pairs: Pairs;
+  readonly #pairs: Pairs;
 
-  private _ss58?: number;
+  readonly #type: KeypairType;
 
-  private _type: KeypairType;
+  #ss58?: number;
 
   public decodeAddress = decodeAddress;
 
@@ -42,9 +42,9 @@ export default class Keyring implements KeyringInstance {
 
     assert(options && ['ed25519', 'sr25519'].includes(options.type || 'undefined'), `Expected a keyring type of either 'ed25519' or 'sr25519', found '${options.type}`);
 
-    this._pairs = new Pairs();
-    this._ss58 = options.ss58Format;
-    this._type = options.type;
+    this.#pairs = new Pairs();
+    this.#ss58 = options.ss58Format;
+    this.#type = options.type;
   }
 
   /**
@@ -65,7 +65,7 @@ export default class Keyring implements KeyringInstance {
    * @description Returns the type of the keyring, either ed25519 of sr25519
    */
   public get type (): KeypairType {
-    return this._type;
+    return this.#type;
   }
 
   /**
@@ -73,7 +73,7 @@ export default class Keyring implements KeyringInstance {
    * @summary Stores an account, given a keyring pair, as a Key/Value (public key, pair) in Keyring Pair Dictionary
    */
   public addPair (pair: KeyringPair): KeyringPair {
-    return this._pairs.add(pair);
+    return this.#pairs.add(pair);
   }
 
   /**
@@ -188,7 +188,7 @@ export default class Keyring implements KeyringInstance {
    * @description Encodes the input into an ss58 representation
    */
   public encodeAddress = (key: Uint8Array | string, ss58Format?: number): string => {
-    return encodeAddress(key, ss58Format || this._ss58);
+    return encodeAddress(key, ss58Format || this.#ss58);
   }
 
   /**
@@ -198,7 +198,7 @@ export default class Keyring implements KeyringInstance {
    * a key lookup using the provided account address or public key (after decoding it).
    */
   public getPair (address: string | Uint8Array): KeyringPair {
-    return this._pairs.get(address);
+    return this.#pairs.get(address);
   }
 
   /**
@@ -207,7 +207,7 @@ export default class Keyring implements KeyringInstance {
    * @description Returns an array list of all the keyring pair values that are stored in the keyring pair dictionary.
    */
   public getPairs (): KeyringPair[] {
-    return this._pairs.all();
+    return this.#pairs.all();
   }
 
   /**
@@ -216,7 +216,7 @@ export default class Keyring implements KeyringInstance {
    * @description Returns an array list of all the public keys associated with each of the keyring pair values that are stored in the keyring pair dictionary.
    */
   public getPublicKeys (): Uint8Array[] {
-    return this._pairs
+    return this.#pairs
       .all()
       .map(({ publicKey }): Uint8Array =>
         publicKey
@@ -228,7 +228,7 @@ export default class Keyring implements KeyringInstance {
    * @description Deletes the provided input address or public key from the stored Keyring Pair Dictionary.
    */
   public removePair (address: string | Uint8Array): void {
-    this._pairs.remove(address);
+    this.#pairs.remove(address);
   }
 
   /**
@@ -236,7 +236,7 @@ export default class Keyring implements KeyringInstance {
    * @description Sets the ss58 format for the keyring
    */
   public setSS58Format (ss58: number): void {
-    this._ss58 = ss58;
+    this.#ss58 = ss58;
   }
 
   /**
@@ -248,6 +248,6 @@ export default class Keyring implements KeyringInstance {
    * may backup their account to a JSON file that contains this information.
    */
   public toJson (address: string | Uint8Array, passphrase?: string): KeyringPair$Json {
-    return this._pairs.get(address).toJson(passphrase);
+    return this.#pairs.get(address).toJson(passphrase);
   }
 }

packages/keyring/src/pair/decode.ts

@@ -14,19 +14,7 @@ type DecodeResult = PairInfo & {
   secretKey: Uint8Array;
 };
 
-export default function decode (passphrase?: string, encrypted?: Uint8Array | null): DecodeResult {
-  assert(encrypted, 'No encrypted data available to decode');
-
-  const encoded = passphrase
-    ? (naclDecrypt(
-      encrypted.subarray(NONCE_LENGTH),
-      encrypted.subarray(0, NONCE_LENGTH),
-      u8aFixLength(stringToU8a(passphrase), 256, true)
-    ) as Uint8Array)
-    : encrypted;
-
-  assert(encoded, 'Unable to unencrypt using the supplied passphrase');
-
+function decodePkcs8 (encoded: Uint8Array): DecodeResult {
   const header = encoded.subarray(0, PKCS8_HEADER.length);
 
   assert(header.toString() === PKCS8_HEADER.toString(), 'Invalid Pkcs8 header found in body');
@@ -52,3 +40,19 @@ export default function decode (passphrase?: string, encrypted?: Uint8Array | nu
     secretKey
   };
 }
+
+export default function decode (passphrase?: string, encrypted?: Uint8Array | null): DecodeResult {
+  assert(encrypted, 'No encrypted data available to decode');
+
+  const encoded = passphrase
+    ? naclDecrypt(
+      encrypted.subarray(NONCE_LENGTH),
+      encrypted.subarray(0, NONCE_LENGTH),
+      u8aFixLength(stringToU8a(passphrase), 256, true)
+    )
+    : encrypted;
+
+  assert(encoded, 'Unable to unencrypt using the supplied passphrase');
+
+  return decodePkcs8(encoded);
+}

packages/keyring/src/pairs.ts

@@ -10,24 +10,20 @@ import { decodeAddress } from '@polkadot/util-crypto';
 type KeyringPairMap = Record<string, KeyringPair>;
 
 export default class Pairs implements KeyringPairs {
-  private _map: KeyringPairMap;
-
-  constructor () {
-    this._map = {};
-  }
+  readonly #map: KeyringPairMap = {};
 
   public add (pair: KeyringPair): KeyringPair {
-    this._map[pair.publicKey.toString()] = pair;
+    this.#map[pair.publicKey.toString()] = pair;
 
     return pair;
   }
 
   public all (): KeyringPair[] {
-    return Object.values(this._map);
+    return Object.values(this.#map);
   }
 
   public get (address: string | Uint8Array): KeyringPair {
-    const pair = this._map[decodeAddress(address).toString()];
+    const pair = this.#map[decodeAddress(address).toString()];
 
     assert(pair, (): string => {
       const formatted: string = isU8a(address) || isHex(address)
@@ -41,6 +37,6 @@ export default class Pairs implements KeyringPairs {
   }
 
   public remove (address: string | Uint8Array): void {
-    delete this._map[decodeAddress(address).toString()];
+    delete this.#map[decodeAddress(address).toString()];
   }
 }

packages/util-crypto/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util-crypto",
-  "version": "2.4.1",
+  "version": "2.7.1",
   "description": "A collection of useful crypto utilities for @polkadot",
   "main": "index.js",
   "keywords": [
@@ -25,23 +25,23 @@
   },
   "homepage": "https://github.com/polkadot-js/common/tree/master/packages/util-crypto#readme",
   "dependencies": {
-    "@babel/runtime": "^7.8.4",
-    "@polkadot/util": "^2.4.1",
-    "@polkadot/wasm-crypto": "^1.0.1",
-    "base-x": "^3.0.7",
+    "@babel/runtime": "^7.9.2",
+    "@polkadot/util": "2.7.1",
+    "@polkadot/wasm-crypto": "^1.2.1",
+    "base-x": "^3.0.8",
     "bip39": "^3.0.2",
     "blakejs": "^1.1.0",
     "bn.js": "^5.1.1",
     "bs58": "^4.0.1",
     "elliptic": "^6.5.2",
     "js-sha3": "^0.8.0",
-    "pbkdf2": "^3.0.9",
+    "pbkdf2": "^3.0.17",
     "tweetnacl": "^1.0.3",
     "xxhashjs": "^0.2.2"
   },
   "devDependencies": {
     "@types/bn.js": "^4.11.6",
-    "@types/bs58": "^4.0.0",
+    "@types/bs58": "^4.0.1",
     "@types/elliptic": "^6.4.12",
     "@types/pbkdf2": "^3.0.0",
     "@types/xxhashjs": "^0.2.1"

packages/util-crypto/src/address/check.ts

@@ -6,8 +6,8 @@ import { Prefix } from './types';
 
 import bs58 from 'bs58';
 
+import checkChecksum from './checkChecksum';
 import defaults from './defaults';
-import sshash from './sshash';
 
 export default function check (address: string, prefix: Prefix): [boolean, string | null] {
   const decoded = bs58.decode(address);
@@ -18,18 +18,7 @@ export default function check (address: string, prefix: Prefix): [boolean, strin
     return [false, 'Invalid decoded address length'];
   }
 
-  const isPublicKey = decoded.length === 35;
+  const [isValid] = checkChecksum(decoded);
 
-  // non-publicKeys has 1 byte checksums, else default to 2
-  const endPos = decoded.length - (isPublicKey ? 2 : 1);
-
-  // calculate the hash and do the checksum byte checks
-  const hash = sshash(decoded.subarray(0, endPos));
-  const checks = isPublicKey
-    ? decoded[decoded.length - 2] === hash[0] && decoded[decoded.length - 1] === hash[1]
-    : decoded[decoded.length - 1] === hash[0];
-
-  return !checks
-    ? [false, 'Invalid decoded address checksum']
-    : [true, null];
+  return [isValid, isValid ? null : 'Invalid decoded address checksum'];
 }

packages/util-crypto/src/address/checkChecksum.ts

@@ -0,0 +1,22 @@
+// Copyright 2017-2020 @polkadot/util-crypto 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 sshash from './sshash';
+
+export default function checkChecksum (decoded: Uint8Array): [boolean, number] {
+  const isPublicKey = decoded.length === 35;
+
+  // non-publicKeys has 1 byte checksums, else default to 2
+  const length = decoded.length - (isPublicKey ? 2 : 1);
+
+  // calculate the hash and do the checksum byte checks
+  const hash = sshash(decoded.subarray(0, length));
+
+  // see if the hash actually matches
+  const isValid = isPublicKey
+    ? decoded[decoded.length - 2] === hash[0] && decoded[decoded.length - 1] === hash[1]
+    : decoded[decoded.length - 1] === hash[0];
+
+  return [isValid, length];
+}

packages/util-crypto/src/address/decode.ts

@@ -9,8 +9,8 @@ import { Prefix } from './types';
 import bs58 from 'bs58';
 import { assert, bufferToU8a, isHex, isU8a, u8aToU8a } from '@polkadot/util';
 
+import checkChecksum from './checkChecksum';
 import defaults from './defaults';
-import sshash from './sshash';
 
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 export default function decode (encoded: string | Uint8Array, ignoreChecksum?: boolean, ss58Format: Prefix = 99): Uint8Array {
@@ -30,18 +30,9 @@ export default function decode (encoded: string | Uint8Array, ignoreChecksum?: b
   //   console.log(`WARN: Expected ${prefix}, found ${decoded[0]}`);
   // }
 
-  const isPublicKey = decoded.length === 35;
+  const [isValid, endPos] = checkChecksum(decoded);
 
-  // non-publicKeys has 1 byte checksums, else default to 2
-  const endPos = decoded.length - (isPublicKey ? 2 : 1);
-
-  // calculate the hash and do the checksum byte checks
-  const hash = sshash(decoded.subarray(0, endPos));
-  const checks = isPublicKey
-    ? decoded[decoded.length - 2] === hash[0] && decoded[decoded.length - 1] === hash[1]
-    : decoded[decoded.length - 1] === hash[0];
-
-  assert(ignoreChecksum || checks, error('Invalid decoded address checksum'));
+  assert(ignoreChecksum || isValid, error('Invalid decoded address checksum'));
 
   return decoded.slice(1, endPos);
 }

packages/util-crypto/src/address/index.ts

@@ -3,12 +3,14 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import checkAddress from './check';
+import checkAddressChecksum from './checkChecksum';
 import decodeAddress from './decode';
 import encodeAddress from './encode';
 import setSS58Format from './setSS58Format';
 
 export {
   checkAddress,
+  checkAddressChecksum,
   decodeAddress,
   encodeAddress,
   setSS58Format

packages/util-crypto/src/index.ts

@@ -2,10 +2,13 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
+// polyfills
 import './polyfill';
 
-import wasmCrypto from '@polkadot/wasm-crypto';
+// out of order and early in the chain, this also kicks off initialization on require
+export * from './init';
 
+// all internal exports
 export * from './address';
 export * from './blake2';
 export * from './keccak';
@@ -16,20 +19,5 @@ export * from './random';
 export * from './schnorrkel';
 export * from './secp256k1';
 export * from './sha512';
+export * from './signature';
 export * from './xxhash';
-
-export function cryptoWaitReady (): Promise<boolean> {
-  return wasmCrypto
-    .waitReady()
-    .then((): boolean => true)
-    .catch((error): boolean => {
-      console.error('Unable to initialize @polkadot/util-crypto', error);
-
-      return false;
-    });
-}
-
-// start init process immediately
-cryptoWaitReady().catch((): void => {
-  // shouldn't happen, logged above
-});

packages/util-crypto/src/init.ts

@@ -0,0 +1,25 @@
+// Copyright 2017-2020 @polkadot/util-crypto 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 wasmCrypto from '@polkadot/wasm-crypto';
+
+export function cryptoIsReady (): boolean {
+  return wasmCrypto.isReady();
+}
+
+export function cryptoWaitReady (): Promise<boolean> {
+  return wasmCrypto
+    .waitReady()
+    .then((): boolean => true)
+    .catch((error): boolean => {
+      console.error('Unable to initialize @polkadot/util-crypto', error);
+
+      return false;
+    });
+}
+
+// start init process immediately
+cryptoWaitReady().catch((): void => {
+  // shouldn't happen, logged above
+});

packages/util-crypto/src/key/DeriveJunction.ts

@@ -16,9 +16,9 @@ const BN_OPTIONS = {
 };
 
 export default class DeriveJunction {
-  private _chainCode: Uint8Array = new Uint8Array(32);
+  readonly #chainCode: Uint8Array = new Uint8Array(32);
 
-  private _isHard = false;
+  #isHard = false;
 
   public static from (value: string): DeriveJunction {
     const [code, isHard] = value.startsWith('/')
@@ -38,15 +38,15 @@ export default class DeriveJunction {
   }
 
   public get chainCode (): Uint8Array {
-    return this._chainCode;
+    return this.#chainCode;
   }
 
   public get isHard (): boolean {
-    return this._isHard;
+    return this.#isHard;
   }
 
   public get isSoft (): boolean {
-    return !this._isHard;
+    return !this.#isHard;
   }
 
   public hard (value: number | BN | string | Uint8Array): DeriveJunction {
@@ -54,7 +54,7 @@ export default class DeriveJunction {
   }
 
   public harden (): DeriveJunction {
-    this._isHard = true;
+    this.#isHard = true;
 
     return this;
   }
@@ -72,14 +72,14 @@ export default class DeriveJunction {
       return this.soft(blake2AsU8a(value));
     }
 
-    this._chainCode.fill(0);
-    this._chainCode.set(value, 0);
+    this.#chainCode.fill(0);
+    this.#chainCode.set(value, 0);
 
     return this;
   }
 
   public soften (): DeriveJunction {
-    this._isHard = false;
+    this.#isHard = false;
 
     return this;
   }

packages/util-crypto/src/key/extractPath.spec.ts

@@ -6,37 +6,32 @@ import keyExtractPath, { ExtractResult } from './extractPath';
 
 describe('keyExtractPath', (): void => {
   it('extracts properly from soft', (): void => {
-    expect(
-      keyExtractPath('/1')
-    ).toEqual({
-      parts: ['/1'],
-      path: [
-        { _isHard: false, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ]
-    });
+    const test = keyExtractPath('/1');
+
+    expect(test.parts).toEqual(['/1']);
+    expect(test.path.length).toEqual(1);
+    expect(test.path[0].isHard).toEqual(false);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('extracts properly from hard', (): void => {
-    expect(
-      keyExtractPath('//1')
-    ).toEqual({
-      parts: ['//1'],
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ]
-    });
+    const test = keyExtractPath('//1');
+
+    expect(test.parts).toEqual(['//1']);
+    expect(test.path.length).toEqual(1);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('extracts properly from hard/soft', (): void => {
-    expect(
-      keyExtractPath('//1/2')
-    ).toEqual({
-      parts: ['//1', '/2'],
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-        { _isHard: false, _chainCode: Uint8Array.from([2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ]
-    });
+    const test = keyExtractPath('//1/2');
+
+    expect(test.parts).toEqual(['//1', '/2']);
+    expect(test.path.length).toEqual(2);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
+    expect(test.path[1].isHard).toEqual(false);
+    expect(test.path[1].chainCode).toEqual(Uint8Array.from([2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('does not extract from invalid paths', (): void => {

packages/util-crypto/src/key/extractSuri.spec.ts

@@ -12,126 +12,115 @@ describe('keyExtractSuri', (): void => {
   });
 
   it('derives on "hello world"', (): void => {
-    expect(
-      keyExtractSuri('hello world')
-    ).toEqual({
-      path: [],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world');
+
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(0);
   });
 
   it('derives on "hello world/1', (): void => {
-    expect(
-      keyExtractSuri('hello world/1')
-    ).toEqual({
-      path: [
-        { _isHard: false, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world/1');
+
+    expect(test.password).not.toBeDefined();
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(1);
+    expect(test.path[0].isHard).toEqual(false);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on "hello world/DOT', (): void => {
-    expect(
-      keyExtractSuri('hello world/DOT')
-    ).toEqual({
-      path: [
-        { _isHard: false, _chainCode: Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world/DOT');
+
+    expect(test.password).not.toBeDefined();
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(1);
+    expect(test.path[0].isHard).toEqual(false);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on "hello world//1', (): void => {
-    expect(
-      keyExtractSuri('hello world//1')
-    ).toEqual({
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world//1');
+
+    expect(test.password).not.toBeDefined();
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(1);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on "hello world//DOT', (): void => {
-    expect(
-      keyExtractSuri('hello world//DOT')
-    ).toEqual({
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world//DOT');
+
+    expect(test.password).not.toBeDefined();
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(1);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on "hello world//1/DOT', (): void => {
-    expect(
-      keyExtractSuri('hello world//1/DOT')
-    ).toEqual({
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-        { _isHard: false, _chainCode: Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world//1/DOT');
+
+    expect(test.password).not.toBeDefined();
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(2);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
+    expect(test.path[1].isHard).toEqual(false);
+    expect(test.path[1].chainCode).toEqual(Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on "hello world//DOT/1', (): void => {
-    expect(
-      keyExtractSuri('hello world//DOT/1')
-    ).toEqual({
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-        { _isHard: false, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world//DOT/1');
+
+    expect(test.password).not.toBeDefined();
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(2);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
+    expect(test.path[1].isHard).toEqual(false);
+    expect(test.path[1].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on "hello world///password"', (): void => {
-    expect(
-      keyExtractSuri('hello world///password')
-    ).toEqual({
-      password: 'password',
-      path: [],
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world///password');
+
+    expect(test.password).toEqual('password');
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(0);
   });
 
   it('derives on "hello world//1/DOT///password"', (): void => {
-    expect(
-      keyExtractSuri('hello world//1/DOT///password')
-    ).toEqual({
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-        { _isHard: false, _chainCode: Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      password: 'password',
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world//1/DOT///password');
+
+    expect(test.password).toEqual('password');
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(2);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
+    expect(test.path[1].isHard).toEqual(false);
+    expect(test.path[1].chainCode).toEqual(Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on "hello world/1//DOT///password"', (): void => {
-    expect(
-      keyExtractSuri('hello world/1//DOT///password')
-    ).toEqual({
-      path: [
-        { _isHard: false, _chainCode: Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-        { _isHard: true, _chainCode: Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      password: 'password',
-      phrase: 'hello world'
-    });
+    const test = keyExtractSuri('hello world/1//DOT///password');
+
+    expect(test.password).toEqual('password');
+    expect(test.phrase).toEqual('hello world');
+    expect(test.path.length).toEqual(2);
+    expect(test.path[0].isHard).toEqual(false);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
+    expect(test.path[1].isHard).toEqual(true);
+    expect(test.path[1].chainCode).toEqual(Uint8Array.from([12, 68, 79, 84, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 
   it('derives on actual Alice', (): void => {
-    expect(
-      keyExtractSuri('bottom drive obey lake curtain smoke basket hold race lonely fit walk//Alice')
-    ).toEqual({
-      path: [
-        { _isHard: true, _chainCode: Uint8Array.from([20, 65, 108, 105, 99, 101, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) }
-      ],
-      phrase: 'bottom drive obey lake curtain smoke basket hold race lonely fit walk'
-    });
+    const test = keyExtractSuri('bottom drive obey lake curtain smoke basket hold race lonely fit walk//Alice');
+
+    expect(test.password).not.toBeDefined();
+    expect(test.phrase).toEqual('bottom drive obey lake curtain smoke basket hold race lonely fit walk');
+    expect(test.path.length).toEqual(1);
+    expect(test.path[0].isHard).toEqual(true);
+    expect(test.path[0].chainCode).toEqual(Uint8Array.from([20, 65, 108, 105, 99, 101, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
   });
 });

packages/util-crypto/src/noWasm.ts

@@ -0,0 +1,13 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+export function isReady (): boolean {
+  // always false, when true it will try and use non-existent functions
+  return false;
+}
+
+export function waitReady (): Promise<boolean> {
+  // always immediate true, our process is done
+  return Promise.resolve(true);
+}

packages/util-crypto/src/signature/index.ts

@@ -0,0 +1,9 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+/**
+ * @summary Utilities for working with signatures
+ */
+
+export { default as signatureVerify } from './verify';

packages/util-crypto/src/signature/verify.spec.ts

@@ -0,0 +1,92 @@
+// Copyright 2017-2020 @polkadot/util-crypto 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 { hexToU8a, stringToU8a, u8aConcat, u8aToHex } from '@polkadot/util';
+import { waitReady } from '@polkadot/wasm-crypto';
+
+import { decodeAddress } from '../address';
+import { signatureVerify } from '.';
+
+const ADDR_ED = 'DxN4uvzwPzJLtn17yew6jEffPhXQfdKHTp2brufb98vGbPN';
+const ADDR_SR = 'EK1bFgKm2FsghcttHT7TB7rNyXApFgs9fCbijMGQNyFGBQm';
+const MESSAGE = 'hello world';
+const SIG_ED = '0x299d3bf4c8bb51af732f8067b3a3015c0862a5ff34721749d8ed6577ea2708365d1c5f76bd519009971e41156f12c70abc2533837ceb3bad9a05a99ab923de06';
+const SIG_SR = '0xca01419b5a17219f7b78335658cab3b126db523a5df7be4bfc2bef76c2eb3b1dcf4ca86eb877d0a6cf6df12db5995c51d13b00e005d053b892bd09c594434288';
+const MUL_ED = u8aToHex(u8aConcat(new Uint8Array([0]), hexToU8a(SIG_ED)));
+const MUL_SR = u8aToHex(u8aConcat(new Uint8Array([1]), hexToU8a(SIG_SR)));
+
+describe('signatureVerify', (): void => {
+  beforeEach(async (): Promise<void> => {
+    await waitReady();
+  });
+
+  it('throws on invalid signature length', (): void => {
+    expect(
+      () => signatureVerify(MESSAGE, new Uint8Array(32), ADDR_ED)
+    ).toThrow('Invalid signature length, expected 64 or 65 bytes, found 32');
+  });
+
+  describe('verifyDetect', (): void => {
+    it('verifies an ed25519 signature', (): void => {
+      expect(signatureVerify(MESSAGE, SIG_ED, ADDR_ED)).toEqual({
+        crypto: 'ed25519',
+        isValid: true
+      });
+    });
+
+    it('verifies an sr25519 signature', (): void => {
+      expect(signatureVerify(MESSAGE, SIG_SR, ADDR_SR)).toEqual({
+        crypto: 'sr25519',
+        isValid: true
+      });
+    });
+
+    it('allows various inputs', (): void => {
+      expect(signatureVerify(stringToU8a(MESSAGE), hexToU8a(SIG_ED), decodeAddress(ADDR_ED))).toEqual({
+        crypto: 'ed25519',
+        isValid: true
+      });
+    });
+
+    it('fails on an invalid signature', (): void => {
+      expect(signatureVerify(MESSAGE, SIG_SR, ADDR_ED)).toEqual({
+        crypto: 'none',
+        isValid: false
+      });
+    });
+  });
+
+  describe('verifyMultisig', (): void => {
+    it('throws with invalid multisig indicator', (): void => {
+      const u8aSig = hexToU8a(MUL_ED);
+
+      u8aSig[0] = 69;
+
+      expect(
+        () => signatureVerify(MESSAGE, u8aSig, ADDR_ED)
+      ).toThrow('Unknown crypto type, expected signature prefix of 0 or 1, found 69');
+    });
+
+    it('verifies an ed25519 signature', (): void => {
+      expect(signatureVerify(MESSAGE, MUL_ED, ADDR_ED)).toEqual({
+        crypto: 'ed25519',
+        isValid: true
+      });
+    });
+
+    it('verifies an sr25519 signature', (): void => {
+      expect(signatureVerify(MESSAGE, MUL_SR, ADDR_SR)).toEqual({
+        crypto: 'sr25519',
+        isValid: true
+      });
+    });
+
+    it('fails on an invalid signature', (): void => {
+      expect(signatureVerify(MESSAGE, MUL_SR, ADDR_ED)).toEqual({
+        crypto: 'sr25519',
+        isValid: false
+      });
+    });
+  });
+});

packages/util-crypto/src/signature/verify.ts

@@ -0,0 +1,67 @@
+// Copyright 2017-2020 @polkadot/util-crypto 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 { KeypairType, VerifyResult } from '../types';
+
+import { assert, u8aToU8a } from '@polkadot/util';
+
+import addressDecode from '../address/decode';
+import naclVerify from '../nacl/verify';
+import schnorrkelVerify from '../schnorrkel/verify';
+
+const VERIFIERS: [KeypairType, (message: Uint8Array | string, signature: Uint8Array | string, publicKey: Uint8Array | string) => boolean][] = [
+  ['ed25519', naclVerify],
+  ['sr25519', schnorrkelVerify]
+];
+
+function verifyDetect (result: VerifyResult, message: Uint8Array | string, signature: Uint8Array, publicKey: Uint8Array): VerifyResult {
+  result.isValid = VERIFIERS.some(([crypto, verify]): boolean => {
+    try {
+      if (verify(message, signature, publicKey)) {
+        result.crypto = crypto;
+
+        return true;
+      }
+    } catch (error) {
+      // do nothing, result.isValid still set to false
+    }
+
+    return false;
+  });
+
+  return result;
+}
+
+function verifyMultisig (result: VerifyResult, message: Uint8Array | string, signature: Uint8Array, publicKey: Uint8Array): VerifyResult {
+  assert([0, 1].includes(signature[0]), `Unknown crypto type, expected signature prefix of 0 or 1, found ${signature[0]}`);
+
+  const isEd25519 = signature[0] === 0;
+
+  result.crypto = isEd25519
+    ? 'ed25519'
+    : 'sr25519';
+
+  try {
+    result.isValid = isEd25519
+      ? naclVerify(message, signature.subarray(1), publicKey)
+      : schnorrkelVerify(message, signature.subarray(1), publicKey);
+  } catch (error) {
+    // ignore, result.isValid still set to false
+  }
+
+  return result;
+}
+
+export default function signatureVerify (message: Uint8Array | string, signature: Uint8Array | string, addressOrPublicKey: Uint8Array | string): VerifyResult {
+  const signatureU8a = u8aToU8a(signature);
+
+  assert([64, 65].includes(signatureU8a.length), `Invalid signature length, expected 64 or 65 bytes, found ${signatureU8a.length}`);
+
+  const result: VerifyResult = { crypto: 'none', isValid: false };
+  const publicKey = addressDecode(addressOrPublicKey);
+
+  return signatureU8a.length === 65
+    ? verifyMultisig(result, message, signatureU8a, publicKey)
+    : verifyDetect(result, message, signatureU8a, publicKey);
+}

packages/util-crypto/src/types.ts

@@ -13,3 +13,8 @@ export interface Seedpair {
 }
 
 export type KeypairType = 'ed25519' | 'sr25519';
+
+export interface VerifyResult {
+  crypto: 'none' | KeypairType;
+  isValid: boolean;
+}

packages/util/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util",
-  "version": "2.4.1",
+  "version": "2.7.1",
   "description": "A collection of useful utilities for @polkadot",
   "main": "index.js",
   "keywords": [
@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/polkadot-js/common/tree/master/packages/util#readme",
   "dependencies": {
-    "@babel/runtime": "^7.8.4",
+    "@babel/runtime": "^7.9.2",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^5.1.1",
     "camelcase": "^5.3.1",

packages/util/src/bn/index.ts

@@ -9,6 +9,7 @@
 export { default as bnFromHex } from './fromHex';
 export { default as bnMax } from './max';
 export { default as bnMin } from './min';
+export { default as bnSqrt } from './sqrt';
 export { default as bnToBn } from './toBn';
 export { default as bnToHex } from './toHex';
 export { default as bnToU8a } from './toU8a';

packages/util/src/bn/max.ts

@@ -7,16 +7,16 @@ import BN from 'bn.js';
 import assert from '../assert';
 
 /**
- * @name max
+ * @name bnMax
  * @summary Finds and returns the highest value in an array of BNs.
  * @example
  * <BR>
  *
  * ```javascript
  * import BN from 'bn.js';
- * import { max } from '@polkadot/util';
+ * import { bnMax } from '@polkadot/util';
  *
- * max([new BN(1), new BN(3), new BN(2)]).toString(); // => '3'
+ * bnMax([new BN(1), new BN(3), new BN(2)]).toString(); // => '3'
  * ```
  */
 export default function max (...items: BN[]): BN {

packages/util/src/bn/min.ts

@@ -7,16 +7,16 @@ import BN from 'bn.js';
 import assert from '../assert';
 
 /**
- * @name min
+ * @name bnMin
  * @summary Finds and returns the smallest value in an array of BNs.
  * @example
  * <BR>
  *
  * ```javascript
  * import BN from 'bn.js';
- * import { min } from '@polkadot/util';
+ * import { bnMin } from '@polkadot/util';
  *
- * min([new BN(1), new BN(3), new BN(2)]).toString(); // => '1'
+ * bnMin([new BN(1), new BN(3), new BN(2)]).toString(); // => '1'
  * ```
  */
 export default function min (...items: BN[]): BN {

packages/util/src/bn/sqrt.spec.ts

@@ -0,0 +1,33 @@
+// Copyright 2017-2020 @polkadot/util 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 BN from 'bn.js';
+
+import { bnSqrt } from '.';
+
+describe('bnSqrt', (): void => {
+  it('fails on < 0 roots', (): void => {
+    expect(
+      () => bnSqrt(new BN(-1))
+    ).toThrow(/negative numbers is not supported/);
+  });
+
+  it('finds the sqrt (exact)', (): void => {
+    expect(
+      bnSqrt(new BN(256).mul(new BN(256)))
+    ).toEqual(new BN(256));
+  });
+
+  it('finds the sqrt (round)', (): void => {
+    expect(
+      bnSqrt(new BN(266))
+    ).toEqual(new BN(16));
+  });
+
+  it('find the sqrt for 1', (): void => {
+    expect(
+      bnSqrt(new BN(1))
+    ).toEqual(new BN(1));
+  });
+});

packages/util/src/bn/sqrt.ts

@@ -0,0 +1,39 @@
+// Copyright 2017-2020 @polkadot/util 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 BN from 'bn.js';
+
+import assert from '../assert';
+
+// https://golb.hplar.ch/2018/09/javascript-bigint.html
+function newtonIteration (n: BN, x0: BN): BN {
+  const x1 = n.div(x0).add(x0).shrn(1);
+
+  if (x0.eq(x1) || x0.eq(x1.subn(1))) {
+    return x0;
+  }
+
+  return newtonIteration(n, x1);
+}
+
+/**
+ * @name bnSqrt
+ * @summary Calculates the integer square root of a BN
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * import BN from 'bn.js';
+ * import { bnSqrt } from '@polkadot/util';
+ *
+ * bnSqrt(new BN(16)).toString(); // => '4'
+ * ```
+ */
+export default function sqrt (value: BN): BN {
+  assert(value.gten(0), 'square root of negative numbers is not supported');
+
+  return value.ltn(2)
+    ? value
+    : newtonIteration(value, new BN(1));
+}

packages/util/src/bn/toBn.spec.ts

@@ -19,6 +19,12 @@ describe('bnToBn', (): void => {
     ).toEqual(128);
   });
 
+  it('converts BigInt values to BN', (): void => {
+    expect(
+      bnToBn(128_821n).toNumber()
+    ).toEqual(128821);
+  });
+
   it('converts number values to BN', (): void => {
     expect(
       bnToBn(128).toNumber()

packages/util/src/bn/toBn.ts

@@ -6,15 +6,16 @@ import { ToBn } from '../types';
 
 import BN from 'bn.js';
 
+import isBigInt from '../is/bigInt';
 import isToBn from '../is/toBn';
 import isHex from '../is/hex';
 import hexToBn from '../hex/toBn';
 
 /**
  * @name bnToBn
- * @summary Creates a BN value from a BN.js bignumber or number input.
+ * @summary Creates a BN value from a BN, BigInt, string (base 10 or hex) or number input.
  * @description
- * `null` inputs returns a `0x0` result, BN values returns the value, numnbers returns a BN representation.
+ * `null` inputs returns a `0x0` result, BN values returns the value, numbers returns a BN representation.
  * @example
  * <BR>
  *
@@ -26,11 +27,13 @@ import hexToBn from '../hex/toBn';
  * bnToBn(new BN(0x1234)); // => BN(0x1234)
  * ```
  */
-export default function bnToBn <ExtToBn extends ToBn> (value?: ExtToBn | BN | string | number | null): BN {
+export default function bnToBn <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | string | number | null): BN {
   if (!value) {
     return new BN(0);
   } else if (isHex(value)) {
     return hexToBn(value.toString());
+  } else if (isBigInt(value)) {
+    return new BN(value.toString());
   }
 
   return BN.isBN(value)

packages/util/src/bn/toHex.ts

@@ -30,10 +30,7 @@ interface Options extends ToBnOptions {
  * bnToHex(new BN(0x123456)); // => '0x123456'
  * ```
  */
-export default function bnToHex (
-  value?: BN | number | null,
-  options: number | Options = { bitLength: -1, isLe: false, isNegative: false }
-): string {
+export default function bnToHex (value?: BN | BigInt | number | null, options: number | Options = { bitLength: -1, isLe: false, isNegative: false }): string {
   if (!value) {
     return ZERO_STR;
   }

packages/util/src/bn/toU8a.ts

@@ -26,13 +26,9 @@ interface Options extends ToBnOptions {
  * bnToU8a(new BN(0x1234)); // => [0x12, 0x34]
  * ```
  */
-function bnToU8a (value: BN | number | null, options?: Options): Uint8Array;
-function bnToU8a (value: BN | number | null, bitLength?: number, isLe?: boolean): Uint8Array;
-function bnToU8a (
-  value: BN | number | null,
-  arg1: number | Options = { bitLength: -1, isLe: true, isNegative: false },
-  arg2?: boolean
-): Uint8Array {
+function bnToU8a (value: BN | BigInt | number | null, options?: Options): Uint8Array;
+function bnToU8a (value: BN | BigInt | number | null, bitLength?: number, isLe?: boolean): Uint8Array;
+function bnToU8a (value: BN | BigInt | number | null, arg1: number | Options = { bitLength: -1, isLe: true, isNegative: false }, arg2?: boolean): Uint8Array {
   const _options: Options = {
     isLe: true,
     isNegative: false,

packages/util/src/compact/toU8a.ts

@@ -24,7 +24,7 @@ const MAX_U32 = new BN(2).pow(new BN(32 - 2)).subn(1);
  * console.log(compactToU8a(511, 32)); // Uint8Array([0b11111101, 0b00000111])
  * ```
  */
-export default function compactToU8a (_value: BN | number): Uint8Array {
+export default function compactToU8a (_value: BN | BigInt | number): Uint8Array {
   const value = bnToBn(_value);
 
   if (value.lte(MAX_U8)) {

packages/util/src/detectPackage.ts

@@ -26,7 +26,7 @@ type PjsGlobal = NodeJS.Global & PjsChecks;
 type PjsWindow = Window & PjsChecks;
 
 function expandPath (path?: string): string {
-  return (!path || path.length < 5) ? '<unknown path>' : path;
+  return (!path || path.length < 5) ? '<unknown>' : path;
 }
 
 /** @internal */
@@ -47,7 +47,7 @@ function flattenVersions (_all: (VersionPath | string)[]): string {
  * @name detectPackage
  * @summary Checks that a specific package is only imported once
  */
-export default function detectPackage ({ name, version }: PackageJson, path?: string): void {
+export default function detectPackage ({ name, version }: PackageJson, path?: string | false): void {
   const _global = typeof window !== 'undefined'
     ? window as PjsWindow
     : global as PjsGlobal;
@@ -58,7 +58,7 @@ export default function detectPackage ({ name, version }: PackageJson, path?: st
 
   assert(name.startsWith('@polkadot'), `Invalid package descriptor ${name}`);
 
-  _global.__polkadotjs[name] = [...(_global.__polkadotjs[name] || []), { path, version }];
+  _global.__polkadotjs[name] = [...(_global.__polkadotjs[name] || []), { path: path || '', version }];
 
   if (_global.__polkadotjs[name].length !== 1) {
     const versions = flattenVersions(_global.__polkadotjs[name]);

packages/util/src/format/formatBalance.spec.ts

@@ -21,6 +21,12 @@ describe('formatBalance', (): void => {
       ).toEqual('123.456µ Unit');
     });
 
+    it('formats BigInt numbers', (): void => {
+      expect(
+        formatBalance(123_456_789_000n, { withSi: true, decimals: 15 })
+      ).toEqual('123.456µ Unit');
+    });
+
     it('formats 123,456,789,000 (decimals=15, old style)', (): void => {
       expect(
         formatBalance(TESTVAL, { withSi: true }, 15)

packages/util/src/format/formatBalance.ts

@@ -26,7 +26,7 @@ interface Options {
 }
 
 interface BalanceFormatter {
-  <ExtToBn extends ToBn> (input?: number | string | BN | ExtToBn, options?: Options, decimals?: number): string;
+  <ExtToBn extends ToBn> (input?: number | string | BN | BigInt | ExtToBn, options?: Options, decimals?: number): string;
   calcSi (text: string, decimals?: number): SiDef;
   findSi (type: string): SiDef;
   getDefaults (): Defaults;
@@ -41,7 +41,7 @@ let defaultDecimals = DEFAULT_DECIMALS;
 let defaultUnit = DEFAULT_UNIT;
 
 // Formats a string/number with <prefix>.<postfix><type> notation
-function _formatBalance <ExtToBn extends ToBn> (input?: number | string | BN | ExtToBn, options: Options | boolean = true, optDecimals: number = defaultDecimals): string {
+function _formatBalance <ExtToBn extends ToBn> (input?: number | string | BN | BigInt | ExtToBn, options: Options | boolean = true, optDecimals: number = defaultDecimals): string {
   let text = bnToBn(input).toString();
 
   if (text.length === 0 || text === '0') {

packages/util/src/format/formatNumber.spec.ts

@@ -25,6 +25,12 @@ describe('formatNumber', (): void => {
     ).toEqual('12,345');
   });
 
+  it('formats BigInt numbers', (): void => {
+    expect(
+      formatNumber(123_456_789n)
+    ).toEqual('123,456,789');
+  });
+
   it('formats Compact<BN>', (): void => {
     expect(
       formatNumber({

packages/util/src/format/formatNumber.ts

@@ -9,6 +9,6 @@ import BN from 'bn.js';
 import bnToBn from '../bn/toBn';
 import formatDecimal from './formatDecimal';
 
-export default function formatNumber <ExtToBn extends ToBn> (value?: ExtToBn | BN | number | null): string {
+export default function formatNumber <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | number | null): string {
   return formatDecimal(bnToBn(value).toString());
 }

packages/util/src/hex/fixLength.ts

@@ -25,19 +25,11 @@ export default function hexFixLength (value: string, bitLength = -1, withPadding
   const strLength = Math.ceil(bitLength / 4);
   const hexLength = strLength + 2;
 
-  if (bitLength === -1 || value.length === hexLength || (!withPadding && value.length < hexLength)) {
-    return hexAddPrefix(
-      hexStripPrefix(value)
-    );
-  }
-
-  if (value.length > hexLength) {
-    return hexAddPrefix(
-      hexStripPrefix(value).slice(-1 * strLength)
-    );
-  }
-
   return hexAddPrefix(
-    `${'0'.repeat(strLength)}${hexStripPrefix(value)}`.slice(-1 * strLength)
+    (bitLength === -1 || value.length === hexLength || (!withPadding && value.length < hexLength))
+      ? hexStripPrefix(value)
+      : (value.length > hexLength)
+        ? hexStripPrefix(value).slice(-1 * strLength)
+        : `${'0'.repeat(strLength)}${hexStripPrefix(value)}`.slice(-1 * strLength)
   );
 }

packages/util/src/hex/toNumber.ts

@@ -19,9 +19,7 @@ import hexToBn from './toBn';
  * ```
  */
 export default function hexToNumber (value?: string | null): number {
-  if (!value) {
-    return NaN;
-  }
-
-  return hexToBn(value).toNumber();
+  return value
+    ? hexToBn(value).toNumber()
+    : NaN;
 }

packages/util/src/is/bigInt.spec.ts

@@ -0,0 +1,25 @@
+// Copyright 2017-2020 @polkadot/util 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 { isBigInt } from '.';
+
+describe('isBigInt', (): void => {
+  it('returns true when a BigInt value', (): void => {
+    expect(
+      isBigInt(123_456n)
+    ).toEqual(true);
+  });
+
+  it('returns true when a BigInt value', (): void => {
+    expect(
+      isBigInt(BigInt(123_456))
+    ).toEqual(true);
+  });
+
+  it('returns false on non-BigInt values', (): void => {
+    expect(
+      isBigInt(0)
+    ).toEqual(false);
+  });
+});

packages/util/src/is/bigInt.ts

@@ -0,0 +1,21 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+/**
+ * @name isBigInt
+ * @summary Tests for a `BigInt` object instance.
+ * @description
+ * Checks to see if the input object is an instance of `BigInt`
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * import { isBigInt } from '@polkadot/util';
+ *
+ * console.log('isBigInt', isBigInt(123_456n)); // => true
+ * ```
+ */
+export default function isBigInt (value: BigInt | object | string | number | undefined | null): value is BigInt {
+  return typeof value === 'bigint';
+}

packages/util/src/is/childClass.spec.ts

@@ -0,0 +1,37 @@
+// Copyright 2017-2020 @polkadot/util 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 BN from 'bn.js';
+
+import { isChildClass } from '.';
+
+describe('isChildClass', (): void => {
+  it('returns true when a Child value', (): void => {
+    expect(
+      isChildClass(BN, class Test extends BN {})
+    ).toEqual(true);
+  });
+
+  it('returns false on non-Child values', (): void => {
+    expect(
+      isChildClass(BN, Uint8Array)
+    ).toEqual(false);
+  });
+
+  it('returns false on undefined', (): void => {
+    expect(
+      isChildClass(BN)
+    ).toEqual(false);
+  });
+
+  it('does TS magic, determining type', (): void => {
+    const T = (class extends BN {}) as unknown;
+
+    if (isChildClass(BN, T)) {
+      expect(new T(12345).toNumber()).toEqual(12345);
+    } else {
+      throw new Error('Not a child class');
+    }
+  });
+});

packages/util/src/is/childClass.ts

@@ -0,0 +1,28 @@
+// Copyright 2017-2020 @polkadot/util 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 { Constructor } from '../types';
+
+/**
+ * @name isChildClass
+ * @summary Tests if the child extends the parent Class
+ * @description
+ * Checks to see if the child Class extends the parent Class
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * import { isChildClass } from '@polkadot/util';
+ *
+ * console.log('isChildClass', isChildClass(BN, BN); // => true
+ * console.log('isChildClass', isChildClass(BN, Uint8Array); // => false
+ * ```
+ */
+export default function isChildClass <P extends Constructor> (Parent: P, Child?: Constructor | null | unknown): Child is P {
+  // https://stackoverflow.com/questions/30993434/check-if-a-constructor-inherits-another-in-es6/30993664
+  return Child
+    // eslint-disable-next-line no-prototype-builtins
+    ? Parent === Child || Parent.isPrototypeOf(Child as Constructor)
+    : false;
+}

packages/util/src/is/index.ts

@@ -5,10 +5,11 @@
 /**
  * @summary Type checking utilities
  */
-
+export { default as isBigInt } from './bigInt';
 export { default as isBn } from './bn';
 export { default as isBuffer } from './buffer';
 export { default as isBoolean } from './boolean';
+export { default as isChildClass } from './childClass';
 export { default as isError } from './error';
 export { default as isFunction } from './function';
 export { default as isHex } from './hex';

packages/util/src/number/toHex.ts

@@ -26,9 +26,5 @@ export default function numberToHex (value?: number | null, bitLength = -1): str
     return '0x';
   }
 
-  return hexFixLength(
-    (value || 0).toString(16),
-    bitLength,
-    true
-  );
+  return hexFixLength(value.toString(16), bitLength, true);
 }

packages/util/src/string/lowerFirst.ts

@@ -17,9 +17,7 @@
  * ```
  */
 export default function stringLowerFirst (value?: string | null): string {
-  if (!value) {
-    return '';
-  }
-
-  return value.charAt(0).toLowerCase() + value.slice(1);
+  return value
+    ? value.charAt(0).toLowerCase() + value.slice(1)
+    : '';
 }

packages/util/src/string/toU8a.ts

@@ -37,9 +37,7 @@ try {
  * ```
  */
 export default function stringToU8a (value?: string): Uint8Array {
-  if (!value) {
-    return new Uint8Array([]);
-  }
-
-  return encoder.encode(value);
+  return value
+    ? encoder.encode(value)
+    : new Uint8Array([]);
 }

packages/util/src/string/upperFirst.ts

@@ -17,9 +17,7 @@
  * ```
  */
 export default function stringUpperFirst (value?: string | null): string {
-  if (!value) {
-    return '';
-  }
-
-  return value.charAt(0).toUpperCase() + value.slice(1);
+  return value
+    ? value.charAt(0).toUpperCase() + value.slice(1)
+    : '';
 }

packages/util/src/types.ts

@@ -4,6 +4,12 @@
 
 import BN from 'bn.js';
 
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export interface Constructor<T = any> {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  new(...value: any[]): T;
+}
+
 export interface ToBn {
   toBn: () => BN;
 }

packages/util/src/u8a/fixLength.ts

@@ -23,9 +23,7 @@ export default function u8aFixLength (value: Uint8Array, bitLength = -1, atStart
 
   if (bitLength === -1 || value.length === byteLength) {
     return value;
-  }
-
-  if (value.length > byteLength) {
+  } else if (value.length > byteLength) {
     return value.subarray(0, byteLength);
   }
 

packages/util/src/u8a/toBn.ts

@@ -26,10 +26,7 @@ import { ToBnOptions } from '../types';
  * u8aToHex(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0xf])); // 0x68656c0f
  * ```
  */
-export default function u8aToBn (
-  value: Uint8Array,
-  options: ToBnOptions | boolean = { isLe: true, isNegative: false }
-): BN {
+export default function u8aToBn (value: Uint8Array, options: ToBnOptions | boolean = { isLe: true, isNegative: false }): BN {
   return hexToBn(
     u8aToHex(value),
     options

packages/util/src/u8a/toBuffer.ts

@@ -17,9 +17,7 @@
  * ```
  */
 export default function u8aToBuffer (value?: Uint8Array | null): Buffer {
-  if (!value) {
-    return Buffer.from([]);
-  }
-
-  return Buffer.from(value);
+  return !value
+    ? Buffer.from([])
+    : Buffer.from(value);
 }

packages/util/src/u8a/toHex.ts

@@ -23,7 +23,7 @@ export default function u8aToHex (value?: Uint8Array | null, bitLength = -1, isP
     ? '0x'
     : '';
 
-  if (!value || !value.length) {
+  if (!value?.length) {
     return prefix;
   }
 

packages/util/src/u8a/toString.ts

@@ -33,9 +33,7 @@ try {
  * ```
  */
 export default function u8aToString (value?: Uint8Array | null): string {
-  if (!value || !value.length) {
-    return '';
-  }
-
-  return decoder.decode(value);
+  return !value?.length
+    ? ''
+    : decoder.decode(value);
 }

packages/util/src/u8a/toU8a.ts

@@ -27,21 +27,15 @@ import stringToU8a from '../string/toU8a';
 export default function u8aToU8a (value?: number[] | Buffer | Uint8Array | string | null): Uint8Array {
   if (!value) {
     return new Uint8Array();
-  }
-
-  if (isBuffer(value)) {
+  } else if (isBuffer(value)) {
     return bufferToU8a(value);
-  }
-
-  if (isString(value)) {
+  } else if (isString(value)) {
     return isHex(value)
       ? hexToU8a(value)
       : stringToU8a(value);
   }
 
-  if (Array.isArray(value)) {
-    return Uint8Array.from(value);
-  }
-
-  return value;
+  return Array.isArray(value)
+    ? Uint8Array.from(value)
+    : value;
 }