added personal_sign in simulator

Author: Aniket-Engg

libs/remix-simulator/src/methods/accounts.ts

@@ -82,6 +82,7 @@ export class Web3Accounts {
       eth_accounts: this.eth_accounts.bind(this),
       eth_getBalance: this.eth_getBalance.bind(this),
       eth_sign: this.eth_sign.bind(this),
+      personal_sign: this.personal_sign.bind(this),
       eth_chainId: this.eth_chainId.bind(this),
       eth_signTypedData: this.eth_signTypedData_v4.bind(this), // default call is using V4
       eth_signTypedData_v4: this.eth_signTypedData_v4.bind(this),
@@ -127,6 +128,20 @@ export class Web3Accounts {
     cb(null, signature)
   }
 
+   personal_sign (payload, cb) {
+    let message = payload.params[0]
+    const address = payload.params[1]
+
+     const privateKey = this.accountsKeys[toChecksumAddress(address)]
+    if (!privateKey) {
+      return cb(new Error('unknown account'))
+    }
+    const wallet: Wallet = new ethers.Wallet(privateKey)
+    const signature = wallet.signMessageSync(toBeArray(message))
+
+    cb(null, signature)
+  }
+
   eth_chainId (_payload, cb) {
     if (!this.options.chainId) return cb(null, '0x539') // 0x539 is hex of 1337
     const id = (typeof this.options.chainId === 'number') ? intToHex(this.options.chainId) : this.options.chainId

libs/remix-simulator/test/accounts.ts

@@ -36,6 +36,16 @@ describe('Accounts', () => {
       const signer = await ethersProvider.getSigner()
       const signature: any = await signer._legacySignMessage('Hello world') // _legacySignMessage uses 'eth_sign' internally
       assert.deepEqual(typeof signature === 'string' ? signature.length : signature.signature.length, 132)
+      assert.deepEqual(signature, "0x4bb5c87f889dcef489ce5965930a33cd4a5a4e20b5c44f9abb948a10f8b5cc5176398e92d9faf9168af3fbf3cb4ab12b99f9c88d34ab91242cc9490f71ca3f751c")
+    })
+  })
+
+  describe('personal_sign', () => {
+    it('should sign payloads', async () => {
+      const signer = await ethersProvider.getSigner()
+      const signature: any = await signer.signMessage('Hello world') // signMessage uses 'personal_sign' internally
+      assert.deepEqual(typeof signature === 'string' ? signature.length : signature.signature.length, 132)
+      assert.deepEqual(signature, "0x4bb5c87f889dcef489ce5965930a33cd4a5a4e20b5c44f9abb948a10f8b5cc5176398e92d9faf9168af3fbf3cb4ab12b99f9c88d34ab91242cc9490f71ca3f751c")
     })
   })