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add batch transactions to CandideAccount
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examples/CandideAccountExamples/CreateAccountAndSendBatchTransactions/.env.example
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| #goerli chain example values | ||
| CHAIN_ID=5 | ||
| BUNDLER_URL=https://goerli.test.voltaire.candidewallet.com/rpc | ||
| ENTRYPOINT_ADDRESS=0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789 | ||
| JSON_RPC_NODE_PROVIDER=https://ethereum-goerli.publicnode.com | ||
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| #account signer privatekey | ||
| PRIVATE_KEY= |
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examples/CandideAccountExamples/CreateAccountAndSendBatchTransactions/README.md
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| <!-- PROJECT LOGO --> | ||
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| <div align="center"> | ||
| <h1 align="center">CreateAccountAndSendBatchTransactions Example - AbstractionKit - Account Abstraction SDK by Candide</h2> | ||
| </div> | ||
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| <div align="center"> | ||
| <img src="https://user-images.githubusercontent.com/7014833/203773780-04a0c8c0-93a6-43a4-bb75-570cb951dfa0.png" height =200> | ||
| </div> | ||
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| # About | ||
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| CreateAccountAndSendBatchTransactions Example - AbstractionKit - Account Abstraction SDK by Candide | ||
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| This example is in the Goerli chain. | ||
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| In this example you will need to fund the new account address(sender) with Goerli eth first. | ||
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| # How to use this example | ||
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| ### copy .env.example and add the paymaster values and a privatekey for signer | ||
| ``` | ||
| cp .env.example .env | ||
| ``` | ||
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| ### install dependencies, build and run | ||
| ``` | ||
| yarn install | ||
| yarn build | ||
| node dist/index.js | ||
| ``` | ||
| <!-- LICENSE --> | ||
| ## License | ||
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| MIT |
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examples/CandideAccountExamples/CreateAccountAndSendBatchTransactions/package.json
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| { | ||
| "name": "CreateAccountAndSendBatchTransactions", | ||
| "version": "1.0.0", | ||
| "description": "create a new account and send a useroperation with multiple transactions.", | ||
| "main": "dist/index.js", | ||
| "scripts": { | ||
| "build": "rm -rf dist && tsc", | ||
| "clean": "rm -rf dist", | ||
| "format": "prettier --write src/**/*.ts", | ||
| "lint": "eslint src/**/*.ts" | ||
| }, | ||
| "license": "MIT", | ||
| "dependencies": { | ||
| "abstractionkit": "^0.0.7", | ||
| "dotenv": "^16.3.1", | ||
| "ethers": "^6.6.7", | ||
| "typescript": "^5.1.6" | ||
| }, | ||
| "devDependencies": { | ||
| "@types/ws": "^8.5.6" | ||
| } | ||
| } |
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examples/CandideAccountExamples/CreateAccountAndSendBatchTransactions/src/index.ts
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| import * as dotenv from 'dotenv' | ||
| import {Wallet, JsonRpcProvider, getBytes, id, ZeroAddress } from "ethers" | ||
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| import { | ||
| Bundler, | ||
| CandideAccount, | ||
| GasEstimationResult, | ||
| UserOperation, | ||
| getUserOperationHash, | ||
| UserOperationDummyValues, | ||
| getCallData, | ||
| MetaTransaction, | ||
| getFunctionSelector, | ||
| Operation | ||
| } from "abstractionkit"; | ||
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| async function main(): Promise<void> { | ||
| //get vlues from .env | ||
| dotenv.config() | ||
| const chainId = process.env.CHAIN_ID as string | ||
| const bundlerUrl = process.env.BUNDLER_URL as string | ||
| const jsonRpcNodeProvider = process.env.JSON_RPC_NODE_PROVIDER as string | ||
| const entrypointAddress = process.env.ENTRYPOINT_ADDRESS as string | ||
| const privateKey = process.env.PRIVATE_KEY as string | ||
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| let bundler: Bundler = new Bundler( | ||
| bundlerUrl, | ||
| entrypointAddress | ||
| ); | ||
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| let eoaSigner = new Wallet(privateKey); | ||
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| let smartAccount = new CandideAccount() | ||
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| //create a new smart account, only needed for the first useroperation for a new account | ||
| let [newAccountAddress, initCode] = smartAccount.createNewAccount([eoaSigner.address]) | ||
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| console.log("Account address(sender) : " + newAccountAddress) | ||
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| // 1st transction - create callData to deposit eth and get wEth in return | ||
| const wEthTokenAddress = "0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6"; | ||
| const depositFunctionSignature = 'deposit()'; | ||
| const depositFunctionSelector = getFunctionSelector(depositFunctionSignature); | ||
| const depositTransactionCallData = getCallData(depositFunctionSelector, [], []); | ||
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| const tx1 :MetaTransaction ={ | ||
| to: wEthTokenAddress, | ||
| value: 10, //amount to deposit | ||
| data: depositTransactionCallData, | ||
| operation: Operation.Call | ||
| } | ||
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| // 2nd transaction - approve allowance to uniswap router | ||
| const uniswapV2RouterAddress = "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D"; | ||
| const approveFunctionSignature = 'approve(address,uint256)'; | ||
| const approveFunctionSelector = getFunctionSelector(approveFunctionSignature); | ||
| const approveTransactionCallData = getCallData( | ||
| approveFunctionSelector, | ||
| ["address", "uint256"], | ||
| [uniswapV2RouterAddress, 10] | ||
| ); | ||
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| const tx2 :MetaTransaction ={ | ||
| to: wEthTokenAddress, | ||
| value: 0, | ||
| data: approveTransactionCallData, | ||
| operation: Operation.Call | ||
| } | ||
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| // 3rd transaction - swap weth for usdc | ||
| const token0 = "0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6"; //weth | ||
| const token1 = "0x9B2660A7BEcd0Bf3d90401D1C214d2CD36317da5"; //usdc | ||
| const swapFunctionSignature = 'swapExactTokensForTokens(uint256,uint256,address[],address,uint256)'; | ||
| const swapFunctionSelector = getFunctionSelector(swapFunctionSignature); | ||
| const swapTransactionCallData = getCallData(swapFunctionSelector, | ||
| ["uint256","uint256","address[]","address", "uint256"], //amountIn, amountOutMin, path, to, deadline | ||
| [ | ||
| 5, //amountIn | ||
| 1, //amountOutMin | ||
| [token0, token1], //path | ||
| newAccountAddress, //to | ||
| Math.floor(Date.now() / 1000) + 60 * 20, // deadline - 20 minutes from the current Unix time | ||
| ] | ||
| ); | ||
| const tx3 :MetaTransaction ={ | ||
| to: uniswapV2RouterAddress, | ||
| value: 0, | ||
| data: swapTransactionCallData, | ||
| operation: Operation.Call | ||
| } | ||
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| let callData = smartAccount.createCallDataBatchTransaction([tx1, tx2, tx3]); | ||
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| const provider = new JsonRpcProvider(jsonRpcNodeProvider); | ||
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| let user_operation :UserOperation={ | ||
| ...UserOperationDummyValues, | ||
| sender:newAccountAddress, | ||
| nonce: "0x00", | ||
| initCode:initCode,//only needed for the first useroperation for a new account | ||
| callData:callData | ||
| } | ||
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| //fetch gas price - use your prefered source | ||
| const feeData = await provider.getFeeData() | ||
| user_operation.maxFeePerGas = "0x" + Math.ceil(Number(feeData.maxFeePerGas)*1.5).toString(16)//convert to hex format | ||
| user_operation.maxPriorityFeePerGas = "0x" + Math.ceil(Number(feeData.maxPriorityFeePerGas)*1.5).toString(16)//convert to hex format | ||
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| let estimation = await bundler.estimateUserOperationGas(user_operation) | ||
| console.log("estimation") | ||
| console.log(estimation) | ||
| if("code" in estimation){ | ||
| return | ||
| } | ||
| //either multiply gas limit with a factor to compensate for the missing paymasterAndData and signature during gas estimation | ||
| //or supply dummy values that will not cause the useroperation to revert | ||
| //for the most accurate values, estimate gas again after acquiring the initial gas limits | ||
| //and a valide paymasterAndData and signature | ||
| estimation = estimation as GasEstimationResult | ||
| user_operation.preVerificationGas = "0x" + Math.ceil(Number(estimation.preVerificationGas)*1.2).toString(16) | ||
| user_operation.verificationGasLimit = "0x" + Math.ceil(Number(estimation.verificationGasLimit)*1.5).toString(16) | ||
| user_operation.callGasLimit = "0x" + Math.ceil(Number(estimation.callGasLimit)*1.2).toString(16) | ||
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| //sign the user operation hash | ||
| let user_operation_hash = getUserOperationHash( | ||
| user_operation, entrypointAddress, chainId | ||
| ) | ||
| user_operation.signature = await eoaSigner.signMessage(getBytes(user_operation_hash)) | ||
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| //send the user operation to the bundler | ||
| let bundlerResponse = await bundler.sendUserOperation(user_operation) | ||
| console.log(bundlerResponse) | ||
| if("message" in bundlerResponse && bundlerResponse.message as string == "AA21 didn't pay prefund"){ | ||
| console.log("Please fund the new account address with some eth to pay for gas : " + newAccountAddress) | ||
| } | ||
| } | ||
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| main() |
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examples/CandideAccountExamples/CreateAccountAndSendBatchTransactions/tsconfig.json
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| { | ||
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| "target": "es2017" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */, | ||
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| "outDir": "./dist", | ||
| "baseUrl": "./", | ||
| "incremental": true, | ||
| "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */, | ||
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| "strict": true /* Enable all strict type-checking options. */, | ||
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| }, | ||
| "include": ["src/**/*"], | ||
| "exclude": ["node_modules", "test", "lib", "**/*spec.ts"] | ||
| } |
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examples/CandideAccountExamples/CreateAccountAndSendBatchTransactions/yarn.lock
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