fix: Rename lastId to blockhash

web3.js/test/mockrpc/get-recent-blockhash.js

@@ -0,0 +1,21 @@
+// @flow
+
+import {Account} from '../../src';
+import {url} from '../url';
+import {mockRpc} from '../__mocks__/node-fetch';
+
+export function mockGetRecentBlockhash() {
+  const recentBlockhash = new Account();
+
+  mockRpc.push([
+    url,
+    {
+      method: 'getRecentBlockhash',
+      params: [],
+    },
+    {
+      error: null,
+      result: recentBlockhash.publicKey.toBase58(),
+    },
+  ]);
+}