Support for eth_getProof RPC (#2986)

Author: jacogr

CHANGELOG.md

@@ -1,5 +1,25 @@
 # CHANGELOG
 
+## 3.2.1
+
+Upgrade priority: Low. Recommended for users of parachains.
+
+Contributed:
+
+- Adjust metadata `.asV12` type signature (Thanks to https://github.com/yjhmelody)
+
+Changes:
+
+- Add `api.{errors, events, query, tx}.<section>.<name>.is(...)`
+- Remove support for staking pre Substrate 2.0
+- Add all frontier types & RPCs
+- Support `AccountInfo` with new provider/consumer refCount structure
+- Additional Cumulus parachain types
+- Consistently format number JSON based on bitLength
+- Cleanup metadata -> api dependencies
+- Update `@polkadot/util` to 5.2.1
+
+
 ## 3.1.1 Dec 20, 2020
 
 Upgrade priority: Low. Recommended for users of parachains.

packages/types/src/interfaces/eth/definitions.ts

@@ -222,8 +222,8 @@ const types: DefinitionsTypes = {
     logsBloom: 'EthBloom'
   },
   EthWork: {
-    pow_hash: 'H256',
-    seed_hash: 'H256',
+    powHash: 'H256',
+    seedHash: 'H256',
     target: 'H256',
     number: 'Option<u64>'
   }

packages/types/src/interfaces/eth/rpc.ts

@@ -123,6 +123,15 @@ export const rpc: DefinitionsRpc = {
     ],
     type: 'Vec<EthLog>'
   },
+  getProof: {
+    description: 'Returns proof for account and storage.',
+    params: [
+      { name: 'address', type: 'H160' },
+      { name: 'storageKeys', type: 'Vec<H256>' },
+      { name: 'number', type: 'BlockNumber' }
+    ],
+    type: 'EthAccount'
+  },
   getStorageAt: {
     description: 'Returns content of the storage at given address.',
     params: [