diff --git a/package.json b/package.json
index 33b35b2ae1..0de7e6e642 100644
--- a/package.json
+++ b/package.json
@@ -34,5 +34,5 @@
     "@types/jest": "^26.0.19",
     "copyfiles": "^2.4.1"
   },
-  "version": "2.10.2-17"
+  "version": "2.10.2-18"
 }
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index a18c2b516f..8b4d124fde 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
   "sideEffects": false,
@@ -13,10 +13,10 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api": "2.10.2-17",
-    "@polkadot/types": "2.10.2-17",
+    "@polkadot/api": "2.10.2-18",
+    "@polkadot/types": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
-    "@polkadot/x-rxjs": "2.10.2-17",
+    "@polkadot/x-rxjs": "2.10.2-18",
     "bn.js": "^4.11.9"
   }
 }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index 70d7120cea..181c242d45 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
   "sideEffects": false,
@@ -13,16 +13,16 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api": "2.10.2-17",
-    "@polkadot/rpc-core": "2.10.2-17",
-    "@polkadot/types": "2.10.2-17",
+    "@polkadot/api": "2.10.2-18",
+    "@polkadot/rpc-core": "2.10.2-18",
+    "@polkadot/types": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
     "@polkadot/util-crypto": "^5.0.1",
-    "@polkadot/x-rxjs": "2.10.2-17",
+    "@polkadot/x-rxjs": "2.10.2-18",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.0.1",
-    "@polkadot/rpc-provider": "2.10.2-17"
+    "@polkadot/rpc-provider": "2.10.2-18"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index 787b3eeffe..87ce776471 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
   "sideEffects": false,
@@ -13,16 +13,16 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api-derive": "2.10.2-17",
+    "@polkadot/api-derive": "2.10.2-18",
     "@polkadot/keyring": "^5.0.1",
-    "@polkadot/metadata": "2.10.2-17",
-    "@polkadot/rpc-core": "2.10.2-17",
-    "@polkadot/rpc-provider": "2.10.2-17",
-    "@polkadot/types": "2.10.2-17",
-    "@polkadot/types-known": "2.10.2-17",
+    "@polkadot/metadata": "2.10.2-18",
+    "@polkadot/rpc-core": "2.10.2-18",
+    "@polkadot/rpc-provider": "2.10.2-18",
+    "@polkadot/types": "2.10.2-18",
+    "@polkadot/types-known": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
     "@polkadot/util-crypto": "^5.0.1",
-    "@polkadot/x-rxjs": "2.10.2-17",
+    "@polkadot/x-rxjs": "2.10.2-18",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
   }
diff --git a/packages/api/src/augment/query.ts b/packages/api/src/augment/query.ts
index b571b4e340..2436c7da44 100644
--- a/packages/api/src/augment/query.ts
+++ b/packages/api/src/augment/query.ts
@@ -407,6 +407,24 @@ declare module '@polkadot/api/types/storage' {
        **/
       accounts: AugmentedQuery<ApiType, (arg: AccountIndex | AnyNumber | Uint8Array) => Observable<Option<ITuple<[AccountId, BalanceOf, bool]>>>> & QueryableStorageEntry<ApiType>;
     };
+    mmr: {
+      [key: string]: QueryableStorageEntry<ApiType>;
+      /**
+       * Hashes of the nodes in the MMR.
+       * 
+       * Note this collection only contains MMR peaks, the inner nodes (and leaves)
+       * are pruned and only stored in the Offchain DB.
+       **/
+      nodes: AugmentedQuery<ApiType, (arg: u64 | AnyNumber | Uint8Array) => Observable<Option<Hash>>> & QueryableStorageEntry<ApiType>;
+      /**
+       * Current size of the MMR (number of leaves).
+       **/
+      numberOfLeaves: AugmentedQuery<ApiType, () => Observable<u64>> & QueryableStorageEntry<ApiType>;
+      /**
+       * Latest MMR Root hash.
+       **/
+      rootHash: AugmentedQuery<ApiType, () => Observable<Hash>> & QueryableStorageEntry<ApiType>;
+    };
     multisig: {
       [key: string]: QueryableStorageEntry<ApiType>;
       calls: AugmentedQuery<ApiType, (arg: U8aFixed | string | Uint8Array) => Observable<Option<ITuple<[OpaqueCall, AccountId, BalanceOf]>>>> & QueryableStorageEntry<ApiType>;
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index 162e0af3c5..eab013db4e 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/metadata",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
   "sideEffects": false,
@@ -13,8 +13,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/types": "2.10.2-17",
-    "@polkadot/types-known": "2.10.2-17",
+    "@polkadot/types": "2.10.2-18",
+    "@polkadot/types-known": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
     "@polkadot/util-crypto": "^5.0.1",
     "bn.js": "^4.11.9"
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 5cc7871f5c..f8b4507dec 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "sideEffects": false,
@@ -13,11 +13,11 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/metadata": "2.10.2-17",
-    "@polkadot/rpc-provider": "2.10.2-17",
-    "@polkadot/types": "2.10.2-17",
+    "@polkadot/metadata": "2.10.2-18",
+    "@polkadot/rpc-provider": "2.10.2-18",
+    "@polkadot/types": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
-    "@polkadot/x-rxjs": "2.10.2-17"
+    "@polkadot/x-rxjs": "2.10.2-18"
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.0.1"
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index b559c5b44b..3f3498babb 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "Transport providers for the API",
   "main": "index.js",
   "sideEffects": false,
@@ -13,7 +13,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/types": "2.10.2-17",
+    "@polkadot/types": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
     "@polkadot/util-crypto": "^5.0.1",
     "@polkadot/x-fetch": "^5.0.1",
@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.0.1",
-    "@polkadot/metadata": "2.10.2-17",
+    "@polkadot/metadata": "2.10.2-18",
     "mock-socket": "^9.0.3",
     "nock": "^13.0.5"
   }
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index 93637f303c..6dc2b5ce44 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/typegen",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "Type generation scripts",
   "main": "index.js",
   "sideEffects": false,
@@ -22,10 +22,10 @@
     "@babel/core": "^7.12.10",
     "@babel/register": "^7.12.10",
     "@babel/runtime": "^7.12.5",
-    "@polkadot/api": "2.10.2-17",
-    "@polkadot/metadata": "2.10.2-17",
-    "@polkadot/rpc-provider": "2.10.2-17",
-    "@polkadot/types": "2.10.2-17",
+    "@polkadot/api": "2.10.2-18",
+    "@polkadot/metadata": "2.10.2-18",
+    "@polkadot/rpc-provider": "2.10.2-18",
+    "@polkadot/types": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
     "handlebars": "^4.7.6",
     "websocket": "^1.0.33",
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index cb091f95ef..caae9115bf 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-known",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "sideEffects": false,
@@ -13,7 +13,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types-known#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/types": "2.10.2-17",
+    "@polkadot/types": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
     "bn.js": "^4.11.9"
   },
diff --git a/packages/types/package.json b/packages/types/package.json
index a7953fcb3f..032a1bccd4 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "sideEffects": false,
@@ -13,10 +13,10 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@polkadot/metadata": "2.10.2-17",
+    "@polkadot/metadata": "2.10.2-18",
     "@polkadot/util": "^5.0.1",
     "@polkadot/util-crypto": "^5.0.1",
-    "@polkadot/x-rxjs": "2.10.2-17",
+    "@polkadot/x-rxjs": "2.10.2-18",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^4.11.9"
   },
diff --git a/packages/x-rxjs/package.json b/packages/x-rxjs/package.json
index 0401e3c5b6..fe2bef28c4 100644
--- a/packages/x-rxjs/package.json
+++ b/packages/x-rxjs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/x-rxjs",
-  "version": "2.10.2-17",
+  "version": "2.10.2-18",
   "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 5a74d703f3..047841a0c5 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": 2.10.2-17
-    "@polkadot/types": 2.10.2-17
+    "@polkadot/api": 2.10.2-18
+    "@polkadot/types": 2.10.2-18
     "@polkadot/util": ^5.0.1
-    "@polkadot/x-rxjs": 2.10.2-17
+    "@polkadot/x-rxjs": 2.10.2-18
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api-derive@2.10.2-17, @polkadot/api-derive@workspace:packages/api-derive":
+"@polkadot/api-derive@2.10.2-18, @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": 2.10.2-17
+    "@polkadot/api": 2.10.2-18
     "@polkadot/keyring": ^5.0.1
-    "@polkadot/rpc-core": 2.10.2-17
-    "@polkadot/rpc-provider": 2.10.2-17
-    "@polkadot/types": 2.10.2-17
+    "@polkadot/rpc-core": 2.10.2-18
+    "@polkadot/rpc-provider": 2.10.2-18
+    "@polkadot/types": 2.10.2-18
     "@polkadot/util": ^5.0.1
     "@polkadot/util-crypto": ^5.0.1
-    "@polkadot/x-rxjs": 2.10.2-17
+    "@polkadot/x-rxjs": 2.10.2-18
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api@2.10.2-17, @polkadot/api@workspace:packages/api":
+"@polkadot/api@2.10.2-18, @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": 2.10.2-17
+    "@polkadot/api-derive": 2.10.2-18
     "@polkadot/keyring": ^5.0.1
-    "@polkadot/metadata": 2.10.2-17
-    "@polkadot/rpc-core": 2.10.2-17
-    "@polkadot/rpc-provider": 2.10.2-17
-    "@polkadot/types": 2.10.2-17
-    "@polkadot/types-known": 2.10.2-17
+    "@polkadot/metadata": 2.10.2-18
+    "@polkadot/rpc-core": 2.10.2-18
+    "@polkadot/rpc-provider": 2.10.2-18
+    "@polkadot/types": 2.10.2-18
+    "@polkadot/types-known": 2.10.2-18
     "@polkadot/util": ^5.0.1
     "@polkadot/util-crypto": ^5.0.1
-    "@polkadot/x-rxjs": 2.10.2-17
+    "@polkadot/x-rxjs": 2.10.2-18
     bn.js: ^4.11.9
     eventemitter3: ^4.0.7
   languageName: unknown
@@ -1843,14 +1843,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/metadata@2.10.2-17, @polkadot/metadata@workspace:packages/metadata":
+"@polkadot/metadata@2.10.2-18, @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": ^5.0.1
-    "@polkadot/types": 2.10.2-17
-    "@polkadot/types-known": 2.10.2-17
+    "@polkadot/types": 2.10.2-18
+    "@polkadot/types-known": 2.10.2-18
     "@polkadot/util": ^5.0.1
     "@polkadot/util-crypto": ^5.0.1
     bn.js: ^4.11.9
@@ -1866,28 +1866,28 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/rpc-core@2.10.2-17, @polkadot/rpc-core@workspace:packages/rpc-core":
+"@polkadot/rpc-core@2.10.2-18, @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": ^5.0.1
-    "@polkadot/metadata": 2.10.2-17
-    "@polkadot/rpc-provider": 2.10.2-17
-    "@polkadot/types": 2.10.2-17
+    "@polkadot/metadata": 2.10.2-18
+    "@polkadot/rpc-provider": 2.10.2-18
+    "@polkadot/types": 2.10.2-18
     "@polkadot/util": ^5.0.1
-    "@polkadot/x-rxjs": 2.10.2-17
+    "@polkadot/x-rxjs": 2.10.2-18
   languageName: unknown
   linkType: soft
 
-"@polkadot/rpc-provider@2.10.2-17, @polkadot/rpc-provider@workspace:packages/rpc-provider":
+"@polkadot/rpc-provider@2.10.2-18, @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": ^5.0.1
-    "@polkadot/metadata": 2.10.2-17
-    "@polkadot/types": 2.10.2-17
+    "@polkadot/metadata": 2.10.2-18
+    "@polkadot/types": 2.10.2-18
     "@polkadot/util": ^5.0.1
     "@polkadot/util-crypto": ^5.0.1
     "@polkadot/x-fetch": ^5.0.1
@@ -1915,10 +1915,10 @@ __metadata:
     "@babel/core": ^7.12.10
     "@babel/register": ^7.12.10
     "@babel/runtime": ^7.12.5
-    "@polkadot/api": 2.10.2-17
-    "@polkadot/metadata": 2.10.2-17
-    "@polkadot/rpc-provider": 2.10.2-17
-    "@polkadot/types": 2.10.2-17
+    "@polkadot/api": 2.10.2-18
+    "@polkadot/metadata": 2.10.2-18
+    "@polkadot/rpc-provider": 2.10.2-18
+    "@polkadot/types": 2.10.2-18
     "@polkadot/util": ^5.0.1
     "@types/websocket": ^1.0.1
     "@types/yargs": ^15.0.11
@@ -1934,28 +1934,28 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/types-known@2.10.2-17, @polkadot/types-known@workspace:packages/types-known":
+"@polkadot/types-known@2.10.2-18, @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": 2.10.2-17
+    "@polkadot/types": 2.10.2-18
     "@polkadot/util": ^5.0.1
     "@types/bn.js": ^4.11.6
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/types@2.10.2-17, @polkadot/types@workspace:packages/types":
+"@polkadot/types@2.10.2-18, @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": ^5.0.1
-    "@polkadot/metadata": 2.10.2-17
+    "@polkadot/metadata": 2.10.2-18
     "@polkadot/util": ^5.0.1
     "@polkadot/util-crypto": ^5.0.1
-    "@polkadot/x-rxjs": 2.10.2-17
+    "@polkadot/x-rxjs": 2.10.2-18
     "@types/bn.js": ^4.11.6
     bn.js: ^4.11.9
   languageName: unknown
@@ -2054,7 +2054,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/x-rxjs@2.10.2-17, @polkadot/x-rxjs@workspace:packages/x-rxjs":
+"@polkadot/x-rxjs@2.10.2-18, @polkadot/x-rxjs@workspace:packages/x-rxjs":
   version: 0.0.0-use.local
   resolution: "@polkadot/x-rxjs@workspace:packages/x-rxjs"
   dependencies: