feat: add EthKeyringWrapper for common Eth logic around KeyringV2 implementation

packages/keyring-api/CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Add `EthKeyringWrapper` abstract class for Ethereum-based `KeyringV2` implementations ([#404](https://github.com/MetaMask/accounts/pull/404))
+  - Provides common Ethereum signing method routing (`submitRequest`) for all Ethereum-based keyrings.
 - Add `KeyringWrapper` base class to adapt legacy keyrings to `KeyringV2` ([#398](https://github.com/MetaMask/accounts/pull/398))
 
 ### Changed

packages/keyring-api/package.json

@@ -46,6 +46,8 @@
     "test:watch": "jest --watch"
   },
   "dependencies": {
+    "@ethereumjs/tx": "^5.4.0",
+    "@metamask/eth-sig-util": "^8.2.0",
     "@metamask/keyring-utils": "workspace:^",
     "@metamask/superstruct": "^3.1.0",
     "@metamask/utils": "^11.1.0",

packages/keyring-api/src/eth/index.ts

@@ -3,3 +3,4 @@ export * from './erc4337';
 export * from './rpc';
 export * from './types';
 export * from './utils';
+export * from './v2';

packages/keyring-api/src/eth/rpc/params.ts

@@ -126,6 +126,14 @@ export type EthEip7702Authorization = Infer<
   typeof EthEip7702AuthorizationStruct
 >;
 
+/**
+ * A struct for getEncryptionPublicKey options.
+ */
+export const EthGetEncryptionPublicKeyOptionsStruct = record(
+  string(),
+  unknown(),
+);
+
 // ============================================================================
 // RPC Method Parameter Structs
 // ============================================================================
@@ -214,3 +222,11 @@ export const EthSignEip7702AuthorizationParamsStruct = tuple([
 export type EthSignEip7702AuthorizationParams = Infer<
   typeof EthSignEip7702AuthorizationParamsStruct
 >;
+
+/**
+ * Parameters for `eth_getEncryptionPublicKey`.
+ */
+export const EthGetEncryptionPublicKeyParamsStruct = tuple([
+  EthAddressStruct, // address
+  optional(EthGetEncryptionPublicKeyOptionsStruct), // options
+]);