diff --git a/package.json b/package.json
index 9cc1767c33..70f4fc5801 100644
--- a/package.json
+++ b/package.json
@@ -34,5 +34,5 @@
     "@types/jest": "^26.0.19",
     "copyfiles": "^2.4.1"
   },
-  "version": "3.1.2-10"
+  "version": "3.1.2-11"
 }
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index ff8fe8d1af..f74244a310 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
   "module": "index.mjs",
@@ -14,10 +14,10 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api": "3.1.2-10",
-    "@polkadot/types": "3.1.2-10",
+    "@polkadot/api": "3.1.2-11",
+    "@polkadot/types": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
-    "@polkadot/x-rxjs": "3.1.2-10",
+    "@polkadot/x-rxjs": "3.1.2-11",
     "bn.js": "^4.11.9"
   }
 }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index f3ac865021..5692a95af5 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
   "module": "index.mjs",
@@ -14,16 +14,16 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api": "3.1.2-10",
-    "@polkadot/rpc-core": "3.1.2-10",
-    "@polkadot/types": "3.1.2-10",
+    "@polkadot/api": "3.1.2-11",
+    "@polkadot/rpc-core": "3.1.2-11",
+    "@polkadot/types": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
     "@polkadot/util-crypto": "^5.2.1",
-    "@polkadot/x-rxjs": "3.1.2-10",
+    "@polkadot/x-rxjs": "3.1.2-11",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.2.1",
-    "@polkadot/rpc-provider": "3.1.2-10"
+    "@polkadot/rpc-provider": "3.1.2-11"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index 5e57faa7e4..79f2ecaba4 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
   "module": "index.mjs",
@@ -17,16 +17,16 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api-derive": "3.1.2-10",
+    "@polkadot/api-derive": "3.1.2-11",
     "@polkadot/keyring": "^5.2.1",
-    "@polkadot/metadata": "3.1.2-10",
-    "@polkadot/rpc-core": "3.1.2-10",
-    "@polkadot/rpc-provider": "3.1.2-10",
-    "@polkadot/types": "3.1.2-10",
-    "@polkadot/types-known": "3.1.2-10",
+    "@polkadot/metadata": "3.1.2-11",
+    "@polkadot/rpc-core": "3.1.2-11",
+    "@polkadot/rpc-provider": "3.1.2-11",
+    "@polkadot/types": "3.1.2-11",
+    "@polkadot/types-known": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
     "@polkadot/util-crypto": "^5.2.1",
-    "@polkadot/x-rxjs": "3.1.2-10",
+    "@polkadot/x-rxjs": "3.1.2-11",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
   }
diff --git a/packages/api/src/augment/rpc.ts b/packages/api/src/augment/rpc.ts
index 29fe2e6302..f3741ac7b3 100644
--- a/packages/api/src/augment/rpc.ts
+++ b/packages/api/src/augment/rpc.ts
@@ -11,7 +11,7 @@ import type { PrefixedStorageKey } from '@polkadot/types/interfaces/childstate';
 import type { AuthorityId } from '@polkadot/types/interfaces/consensus';
 import type { ContractCallRequest, ContractExecResult } from '@polkadot/types/interfaces/contracts';
 import type { CreatedBlock } from '@polkadot/types/interfaces/engine';
-import type { EthCallRequest, EthFilter, EthLog, EthReceipt, EthRichBlock, EthSubKind, EthSubParams, EthSyncStatus, EthTransaction, EthTransactionRequest, EthWork } from '@polkadot/types/interfaces/eth';
+import type { EthAccount, EthCallRequest, EthFilter, EthLog, EthReceipt, EthRichBlock, EthSubKind, EthSubParams, EthSyncStatus, EthTransaction, EthTransactionRequest, EthWork } from '@polkadot/types/interfaces/eth';
 import type { Extrinsic } from '@polkadot/types/interfaces/extrinsics';
 import type { EncodedFinalityProofs, JustificationNotification, ReportedRoundStates } from '@polkadot/types/interfaces/grandpa';
 import type { StorageKind } from '@polkadot/types/interfaces/offchain';
@@ -192,6 +192,10 @@ declare module '@polkadot/rpc-core/types.jsonrpc' {
        * Returns logs matching given filter object.
        **/
       getLogs: AugmentedRpc<(filter: EthFilter | { fromBlock?: any; toBlock?: any; blockHash?: any; address?: any; topics?: any } | string | Uint8Array) => Observable<Vec<EthLog>>>;
+      /**
+       * Returns proof for account and storage.
+       **/
+      getProof: AugmentedRpc<(address: H160 | string | Uint8Array, storageKeys: Vec<H256> | (H256 | string | Uint8Array)[], number: BlockNumber | AnyNumber | Uint8Array) => Observable<EthAccount>>;
       /**
        * Returns content of the storage at given address.
        **/
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index be517d9ba0..ceab80af50 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/metadata",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
   "module": "index.mjs",
@@ -17,8 +17,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/types": "3.1.2-10",
-    "@polkadot/types-known": "3.1.2-10",
+    "@polkadot/types": "3.1.2-11",
+    "@polkadot/types-known": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
     "@polkadot/util-crypto": "^5.2.1",
     "bn.js": "^4.11.9"
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index f96443051a..d9a9e89bc9 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "module": "index.mjs",
@@ -14,11 +14,11 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/metadata": "3.1.2-10",
-    "@polkadot/rpc-provider": "3.1.2-10",
-    "@polkadot/types": "3.1.2-10",
+    "@polkadot/metadata": "3.1.2-11",
+    "@polkadot/rpc-provider": "3.1.2-11",
+    "@polkadot/types": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
-    "@polkadot/x-rxjs": "3.1.2-10"
+    "@polkadot/x-rxjs": "3.1.2-11"
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.2.1"
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 1c4877f0f8..88ef18230c 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "Transport providers for the API",
   "main": "index.js",
   "module": "index.mjs",
@@ -14,7 +14,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/types": "3.1.2-10",
+    "@polkadot/types": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
     "@polkadot/util-crypto": "^5.2.1",
     "@polkadot/x-fetch": "^5.2.1",
@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.2.1",
-    "@polkadot/metadata": "3.1.2-10",
+    "@polkadot/metadata": "3.1.2-11",
     "mock-socket": "^9.0.3",
     "nock": "^13.0.5"
   }
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index fb726b7c4c..765aabaf74 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/typegen",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "Type generation scripts",
   "main": "index.js",
   "module": "index.mjs",
@@ -23,10 +23,10 @@
     "@babel/core": "^7.12.10",
     "@babel/register": "^7.12.10",
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api": "3.1.2-10",
-    "@polkadot/metadata": "3.1.2-10",
-    "@polkadot/rpc-provider": "3.1.2-10",
-    "@polkadot/types": "3.1.2-10",
+    "@polkadot/api": "3.1.2-11",
+    "@polkadot/metadata": "3.1.2-11",
+    "@polkadot/rpc-provider": "3.1.2-11",
+    "@polkadot/types": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
     "handlebars": "^4.7.6",
     "websocket": "^1.0.33",
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index 75d20156fa..e6f8d84874 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-known",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "module": "index.mjs",
@@ -14,7 +14,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types-known#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/types": "3.1.2-10",
+    "@polkadot/types": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
     "bn.js": "^4.11.9"
   },
diff --git a/packages/types/package.json b/packages/types/package.json
index 266a00ff42..9c461f58f0 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "module": "index.mjs",
@@ -17,10 +17,10 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/metadata": "3.1.2-10",
+    "@polkadot/metadata": "3.1.2-11",
     "@polkadot/util": "^5.2.1",
     "@polkadot/util-crypto": "^5.2.1",
-    "@polkadot/x-rxjs": "3.1.2-10",
+    "@polkadot/x-rxjs": "3.1.2-11",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^4.11.9"
   },
diff --git a/packages/types/src/interfaces/eth/types.ts b/packages/types/src/interfaces/eth/types.ts
index 88edbb4bfe..6ab6ed76d2 100644
--- a/packages/types/src/interfaces/eth/types.ts
+++ b/packages/types/src/interfaces/eth/types.ts
@@ -265,8 +265,8 @@ export interface EthTransactionStatus extends Struct {
 
 /** @name EthWork */
 export interface EthWork extends Struct {
-  readonly pow_hash: H256;
-  readonly seed_hash: H256;
+  readonly powHash: H256;
+  readonly seedHash: H256;
   readonly target: H256;
   readonly number: Option<u64>;
 }
diff --git a/packages/x-rxjs/package.json b/packages/x-rxjs/package.json
index 6e7a1a4d08..9b7fbe2887 100644
--- a/packages/x-rxjs/package.json
+++ b/packages/x-rxjs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/x-rxjs",
-  "version": "3.1.2-10",
+  "version": "3.1.2-11",
   "description": "A pass-through interface for RxJs (allowing node + mjs usage)",
   "main": "index.js",
   "sideEffects": false,
diff --git a/yarn.lock b/yarn.lock
index db062c5b8f..dcdc3d118e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1691,46 +1691,46 @@ __metadata:
   resolution: "@polkadot/api-contract@workspace:packages/api-contract"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/api": 3.1.2-10
-    "@polkadot/types": 3.1.2-10
+    "@polkadot/api": 3.1.2-11
+    "@polkadot/types": 3.1.2-11
     "@polkadot/util": ^5.2.1
-    "@polkadot/x-rxjs": 3.1.2-10
+    "@polkadot/x-rxjs": 3.1.2-11
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api-derive@3.1.2-10, @polkadot/api-derive@workspace:packages/api-derive":
+"@polkadot/api-derive@3.1.2-11, @polkadot/api-derive@workspace:packages/api-derive":
   version: 0.0.0-use.local
   resolution: "@polkadot/api-derive@workspace:packages/api-derive"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/api": 3.1.2-10
+    "@polkadot/api": 3.1.2-11
     "@polkadot/keyring": ^5.2.1
-    "@polkadot/rpc-core": 3.1.2-10
-    "@polkadot/rpc-provider": 3.1.2-10
-    "@polkadot/types": 3.1.2-10
+    "@polkadot/rpc-core": 3.1.2-11
+    "@polkadot/rpc-provider": 3.1.2-11
+    "@polkadot/types": 3.1.2-11
     "@polkadot/util": ^5.2.1
     "@polkadot/util-crypto": ^5.2.1
-    "@polkadot/x-rxjs": 3.1.2-10
+    "@polkadot/x-rxjs": 3.1.2-11
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api@3.1.2-10, @polkadot/api@workspace:packages/api":
+"@polkadot/api@3.1.2-11, @polkadot/api@workspace:packages/api":
   version: 0.0.0-use.local
   resolution: "@polkadot/api@workspace:packages/api"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/api-derive": 3.1.2-10
+    "@polkadot/api-derive": 3.1.2-11
     "@polkadot/keyring": ^5.2.1
-    "@polkadot/metadata": 3.1.2-10
-    "@polkadot/rpc-core": 3.1.2-10
-    "@polkadot/rpc-provider": 3.1.2-10
-    "@polkadot/types": 3.1.2-10
-    "@polkadot/types-known": 3.1.2-10
+    "@polkadot/metadata": 3.1.2-11
+    "@polkadot/rpc-core": 3.1.2-11
+    "@polkadot/rpc-provider": 3.1.2-11
+    "@polkadot/types": 3.1.2-11
+    "@polkadot/types-known": 3.1.2-11
     "@polkadot/util": ^5.2.1
     "@polkadot/util-crypto": ^5.2.1
-    "@polkadot/x-rxjs": 3.1.2-10
+    "@polkadot/x-rxjs": 3.1.2-11
     bn.js: ^4.11.9
     eventemitter3: ^4.0.7
   languageName: unknown
@@ -1843,14 +1843,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/metadata@3.1.2-10, @polkadot/metadata@workspace:packages/metadata":
+"@polkadot/metadata@3.1.2-11, @polkadot/metadata@workspace:packages/metadata":
   version: 0.0.0-use.local
   resolution: "@polkadot/metadata@workspace:packages/metadata"
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/keyring": ^5.2.1
-    "@polkadot/types": 3.1.2-10
-    "@polkadot/types-known": 3.1.2-10
+    "@polkadot/types": 3.1.2-11
+    "@polkadot/types-known": 3.1.2-11
     "@polkadot/util": ^5.2.1
     "@polkadot/util-crypto": ^5.2.1
     bn.js: ^4.11.9
@@ -1866,28 +1866,28 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/rpc-core@3.1.2-10, @polkadot/rpc-core@workspace:packages/rpc-core":
+"@polkadot/rpc-core@3.1.2-11, @polkadot/rpc-core@workspace:packages/rpc-core":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-core@workspace:packages/rpc-core"
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/keyring": ^5.2.1
-    "@polkadot/metadata": 3.1.2-10
-    "@polkadot/rpc-provider": 3.1.2-10
-    "@polkadot/types": 3.1.2-10
+    "@polkadot/metadata": 3.1.2-11
+    "@polkadot/rpc-provider": 3.1.2-11
+    "@polkadot/types": 3.1.2-11
     "@polkadot/util": ^5.2.1
-    "@polkadot/x-rxjs": 3.1.2-10
+    "@polkadot/x-rxjs": 3.1.2-11
   languageName: unknown
   linkType: soft
 
-"@polkadot/rpc-provider@3.1.2-10, @polkadot/rpc-provider@workspace:packages/rpc-provider":
+"@polkadot/rpc-provider@3.1.2-11, @polkadot/rpc-provider@workspace:packages/rpc-provider":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-provider@workspace:packages/rpc-provider"
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/keyring": ^5.2.1
-    "@polkadot/metadata": 3.1.2-10
-    "@polkadot/types": 3.1.2-10
+    "@polkadot/metadata": 3.1.2-11
+    "@polkadot/types": 3.1.2-11
     "@polkadot/util": ^5.2.1
     "@polkadot/util-crypto": ^5.2.1
     "@polkadot/x-fetch": ^5.2.1
@@ -1915,10 +1915,10 @@ __metadata:
     "@babel/core": ^7.12.10
     "@babel/register": ^7.12.10
     "@babel/runtime": ^7.12.5
-    "@polkadot/api": 3.1.2-10
-    "@polkadot/metadata": 3.1.2-10
-    "@polkadot/rpc-provider": 3.1.2-10
-    "@polkadot/types": 3.1.2-10
+    "@polkadot/api": 3.1.2-11
+    "@polkadot/metadata": 3.1.2-11
+    "@polkadot/rpc-provider": 3.1.2-11
+    "@polkadot/types": 3.1.2-11
     "@polkadot/util": ^5.2.1
     "@types/websocket": ^1.0.1
     "@types/yargs": ^15.0.12
@@ -1934,28 +1934,28 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/types-known@3.1.2-10, @polkadot/types-known@workspace:packages/types-known":
+"@polkadot/types-known@3.1.2-11, @polkadot/types-known@workspace:packages/types-known":
   version: 0.0.0-use.local
   resolution: "@polkadot/types-known@workspace:packages/types-known"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/types": 3.1.2-10
+    "@polkadot/types": 3.1.2-11
     "@polkadot/util": ^5.2.1
     "@types/bn.js": ^4.11.6
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/types@3.1.2-10, @polkadot/types@workspace:packages/types":
+"@polkadot/types@3.1.2-11, @polkadot/types@workspace:packages/types":
   version: 0.0.0-use.local
   resolution: "@polkadot/types@workspace:packages/types"
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/keyring": ^5.2.1
-    "@polkadot/metadata": 3.1.2-10
+    "@polkadot/metadata": 3.1.2-11
     "@polkadot/util": ^5.2.1
     "@polkadot/util-crypto": ^5.2.1
-    "@polkadot/x-rxjs": 3.1.2-10
+    "@polkadot/x-rxjs": 3.1.2-11
     "@types/bn.js": ^4.11.6
     bn.js: ^4.11.9
   languageName: unknown
@@ -2053,7 +2053,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/x-rxjs@3.1.2-10, @polkadot/x-rxjs@workspace:packages/x-rxjs":
+"@polkadot/x-rxjs@3.1.2-11, @polkadot/x-rxjs@workspace:packages/x-rxjs":
   version: 0.0.0-use.local
   resolution: "@polkadot/x-rxjs@workspace:packages/x-rxjs"
   dependencies: