base on # Description This repository contains the tools and resources for working with [ERC-4337](https://eips.ethereum.org/EIPS/eip-4337) Account Abstraction smart contracts. This includes the code for the singleton `EntryPoint` contract that is deployed by our team on most EVM-compatible networks. # Overview Account abstraction allows users to interact with Ethereum using smart contract wallets instead of EOAs, without compromising decentralization, providing benefits like: - Social recovery - Batched transactions - Sponsored transactions (gas abstraction) - Signature abstraction - Advanced authorization logic # Repository Structure ## Core Components - **EntryPoint Contract** (`contracts/core/EntryPoint.sol`): The central contract that processes UserOperations - **BaseAccount** (`contracts/core/BaseAccount.sol`): Base implementation for smart contract accounts - **BasePaymaster** (`contracts/core/BasePaymaster.sol`): Helper class for creating a paymaster - **StakeManager** (`contracts/core/StakeManager.sol`): Manages deposits and stakes for accounts and paymasters - **NonceManager** (`contracts/core/NonceManager.sol`): Handles nonce management for accounts - **UserOperationLib** (`contracts/core/UserOperationLib.sol`): Utilities for working with UserOperations - **Helpers** (`contracts/core/Helpers.sol`): Common constants and helper functions ## Sample Implementations - **SimpleAccount** (`contracts/accounts/SimpleAccount.sol`): Basic implementation of an ERC-4337 account - **Simple7702Account** (`contracts/accounts/Simple7702Account.sol`): A minimal account to be used with EIP-7702 (for batching) and ERC-4337 (for gas sponsoring) - **SimpleAccountFactory** (`contracts/accounts/SimpleAccountFactory.sol`): A sample factory contract for SimpleAccount # Developer setup ## Installation ### Clone the repository: ````bash git clone https://github.com/eth-infinitism/account-abstraction.git cd account-abstraction yarn install ```` ### Compilation: ```bash yarn compile ``` ### Testing: ```bash yarn test ``` ## Entrypoint Deployment The EntryPoint contract is the central hub for processing UserOperations. It: - Validates UserOperations - Handles account creation (if needed) - Executes the requested operations - Manages gas payments and refunds The EntryPoint is deployed by using ```bash hardhat deploy --network {net} ``` [EntryPoint v0.8](https://github.com/eth-infinitism/account-abstraction/releases/latest) is always deployed at address `0x4337084d9e255ff0702461cf8895ce9e3b5ff108` This repository also includes a number of audited base classes and utilities that can simplify the development of AA related contracts. ## Usage ### For projects integrating the library If you are building a project that uses account abstraction and want to integrate our contracts: ```bash yarn add @account-abstraction/contracts ``` ### For Paymaster development ```solidity import "@account-abstraction/contracts/core/BasePaymaster.sol"; contract MyCustomPaymaster is BasePaymaster { /// implement your gas payment logic here function _validatePaymasterUserOp( PackedUserOperation calldata userOp, bytes32 userOpHash, uint256 maxCost ) internal virtual override returns (bytes memory context, uint256 validationData) { context = “”; // specify “context” if needed in postOp call. validationData = _packValidationData( false, validUntil, validAfter ); } } ``` ### For Smart Contract Account development ```bash import "@account-abstraction/contracts/core/BaseAccount.sol"; contract MyAccount is BaseAccount { /// implement your authentication logic here function _validateSignature(PackedUserOperation calldata userOp, bytes32 userOpHash) internal override virtual returns (uint256 validationData) { // UserOpHash can be generated using eth_signTypedData_v4 if (owner != ECDSA.recover(userOpHash, userOp.signature)) return SIG_VALIDATION_FAILED; return SIG_VALIDATION_SUCCESS; } } ``` # Resources - [Homepage](https://www.erc4337.io/) - [Blog](https://erc4337.mirror.xyz/) - [X Account](https://x.com/erc4337) - [YouTube Channel](https://www.youtube.com/@ERC-4337) - [Bundlebear](https://www.bundlebear.com/overview/all) - [Vitalik Buterin - a history of account abstraction](https://www.youtube.com/watch?v=iLf8qpOmxQc) - [Beyond 4337: Vitalik Buterin's Vision for the Future of Account Abstraction](https://www.youtube.com/watch?v=zpqa1Z4UpiA) - [Exploring the Future of Account Abstraction by Yoav Weiss](https://www.youtube.com/watch?v=63Wd5mPla-M) - [Native Account Abstraction in Pectra, rollups and beyond](https://www.youtube.com/watch?v=FYanFF-yU6w) - [Vitalik Buterin - account abstraction without Ethereum protocol changes](https://medium.com/infinitism/erc-4337-account-abstraction-without-ethereum-protocol-changes-d75c9d94dc4a) - [Unified ERC-4337 mempool](https://notes.ethereum.org/@yoav/unified-erc-4337-mempool) - [Bundler reference implementation](https://github.com/eth-infinitism/bundler) - [Discord server](http://discord.gg/fbDyENb6Y9) ", Assign "at most 3 tags" to the expected json: {"id":"504","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"