ERC---4337-using-Stackup-SDK/main.ts at main · Bhanu-Partap/ERC---4337-using-Stackup-SDK · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98


//=====    ====== //
// import { ethers } from 'ethers';
// import { Presets, Client } from 'userop';
// import * as dotenv from 'dotenv';
// dotenv.config();

// const config = {
//   rpcUrl: process.env.RPC_URL,
//   paymasterUrl: process.env.PAYMASTER_RPC_URL,
//   provider_data: process.env.PROVIDER
// }

// const rpcUrl = config.rpcUrl;
// const paymasterUrl = config.paymasterUrl;

// let provider: ethers.providers.JsonRpcProvider | undefined;

// if (config.provider_data) {
//   provider = new ethers.providers.JsonRpcProvider(config.provider_data);
// } else {
//   console.error('Provider data is undefined.');
// }


import { ethers } from 'ethers';
import { Presets, Client } from 'userop';
// require('dotenv').config();
import * as dotenv from 'dotenv';
dotenv.config();

// const config = {
//   rpcUrl: process.env.RPC_URL,
//   paymasterUrl: process.env.PAYMASTER_RPC_URL,
//   provider_data: process.env.PROVIDER
// }
// const rpcUrl: string | undefined = process.env.RPC_URL;
// const paymasterUrl: string | undefined = process.env.PAYMASTER_RPC_URL;
const rpcUrl= "https://api.stackup.sh/v1/node/c713cd6b5ac9196b897e0e69c5be6951f3f18b3ca763fd7cd346310b9ddfdd3e";
const paymasterUrl = "https://api.stackup.sh/v1/paymaster/c713cd6b5ac9196b897e0e69c5be6951f3f18b3ca763fd7cd346310b9ddfdd3e";
const provider = new ethers.providers.JsonRpcProvider("https://sepolia.infura.io/v3/9a8614ca9a11412aaab9734cdde0cd29");


async function main() {

  const paymasterContext = { type: 'payg' };
  const paymasterMiddleware = Presets.Middleware.verifyingPaymaster(
    paymasterUrl,
    paymasterContext
  );
  const opts =
    paymasterUrl.toString() === ''
      ? {}
      : {
        paymasterMiddleware: paymasterMiddleware,
      };

  // Initialize the account
  const signingKey ="0x";
  // console.log(signingKey);
  const signer = new ethers.Wallet(signingKey);
  var builder = await Presets.Builder.SimpleAccount.init(signer, rpcUrl, opts);
  const address = builder.getSender();
  console.log(`Account address: ${address}`);

  // Create the call data
  const to = address; // Receiving address, in this case we will send it to ourselves
  const token = "0x3938Ac4C25454F65F62292b748a105d70bA5D71f"; // Address of the ERC-20 token
  const value = "0"; // Amount of the ERC-20 token to transfer

  // Read the ERC-20 token contract
  const ERC20_ABI = require("./erc20Abi.json"); // ERC-20 ABI in json format
  const erc20 = new ethers.Contract(token, ERC20_ABI, provider);
  const decimals = await Promise.all([erc20.decimals()]);
  const amount = ethers.utils.parseUnits(value, decimals);

  // Encode the calls
  const callTo = [token, token];
  const callData = [erc20.interface.encodeFunctionData("approve", [to, amount]),
  erc20.interface.encodeFunctionData("transfer", [to, amount])]

  // Send the User Operation to the ERC-4337 mempool
  const client = await Client.init(rpcUrl);
  const res = await client.sendUserOperation(builder.executeBatch(callTo, callData), {
    onBuild: (op) => console.log('Signed UserOperation:', op),
  });

  // Return receipt
  console.log(`UserOpHash: ${res.userOpHash}`);
  console.log('Waiting for transaction...');
  const ev = await res.wait();
  console.log(`Transaction hash: ${ev?.transactionHash ?? null}`);
  console.log(`View here: https://jiffyscan.xyz/userOpHash/${res.userOpHash}`);
}

main().catch((err) => console.error('Error:', err));