Viem

Install

npm

npm i @cometh/connect-sdk-4337 @viem

yarn

yarn @cometh/connect-sdk-4337 @viem

Create a smart account

TS

import { ENTRYPOINT_ADDRESS_V07, createSafeSmartAccount, 
  createSmartAccountClient } from "@cometh/connect-sdk-4337";

const apiKey = process.env.COMETH_API_KEY;
const rpcUrl = process.env.RPC_URL;

const smartAccount = await createSafeSmartAccount({
    apiKey,
    rpcUrl,
    entryPoint: ENTRYPOINT_ADDRESS_V07,
 });    

Get smart account address

TS

const address = smartAccount.address

Create a smart account client

TS

import { ENTRYPOINT_ADDRESS_V07, createSafeSmartAccount, 
  createSmartAccountClient } from "@cometh/connect-sdk-4337";
import { http } from "viem"

const apiKey = process.env.COMETH_API_KEY;
const bundlerUrl = process.env.4337_BUNDLER_URL;
const rpcUrl = process.env.RPC_URL;


const smartAccount = await createSafeSmartAccount({
    apiKey,
    rpcUrl,
    entryPoint: ENTRYPOINT_ADDRESS_V07,
 });
        
const smartAccountClient = createSmartAccountClient({
    account: smartAccount,
    entryPoint: ENTRYPOINT_ADDRESS_V07,
    chain: arbitrumSepolia,
    bundlerTransport: http(bundlerUrl)
})

Send a transaction

TS

import { encodeFunctionData } from "viem"
import countContractAbi from "@/contract/counterABI.json";


const calldata = encodeFunctionData({
        abi: countContractAbi,
        functionName: "count",
});

 
const txHash =  await smartAccountClient.sendTransaction(
        {
          to: COUNTER_CONTRACT_ADDRESS,
          data: calldata,
        }
);

Batch transactions

TS

import { encodeFunctionData } from "viem"
import countContractAbi from "@/contract/counterABI.json";


const calldata = encodeFunctionData({
        abi: countContractAbi,
        functionName: "count",
});

 
const txHash =  await smartAccountClient.sendTransactions(
  {
    transactions: [
      {
        to: COUNTER_CONTRACT_ADDRESS,
        data: calldata,
      },
      {
        to: COUNTER_CONTRACT_ADDRESS,
        data: calldata,
      },
    ],
  }
);

Retrieve smart account address from passkey

TS

import { retrieveAccountAddressFromPasskey } from "@cometh/connect-sdk-4337";

const apiKey = process.env.COMETH_API_KEY;

const walletAddress = await retrieveAccountAddressFromPasskey(apiKey);