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Entrypoint

EntryPoint Contract in the Account Abstraction Flow​

The EntryPoint contract is a pivotal smart contract at the heart of the Account Abstraction Flow. This singleton contract acts as the main entry point for executing bundles of user operations, often referred to as userOps. There is only one EntryPoint Contract deployed on each Ethereum Virtual Machine (EVM) chain, ensuring a standardized and centralized process for managing these user operations.

Versions of EntryPoint Contract​

EntryPointV6​

The EntryPointV6 contract was one of the earlier iterations of this core component. It laid the groundwork for handling user operations but had certain limitations and areas for improvement. It served as a crucial step in the evolution of the EntryPoint contract, providing valuable insights and feedback that were essential for the development of subsequent versions.

EntryPointV7​

Building on the experience gained from EntryPointV6, the EntryPointV7 contract introduces several enhancements and optimizations. It offers better efficiency, security, and functionality, making it the preferred version for current implementations. The improvements in EntryPointV7 reflect the ongoing commitment to refining and perfecting the process of executing user operations in the EVM environment.

Functional Differences between EntryPointV6 and EntryPointV7​

EntryPointV7 (also referred to as v0.7.0) introduces several significant improvements over EntryPointV6 (v0.6.0). These changes enhance the overall functionality, efficiency, and security of the Account Abstraction flow. Here are the key functional differences:

  1. Optimized Data Structures

    • V7 introduces a PackedUserOperation struct, consolidating multiple fields into a single bytes32 value.
    • This optimization significantly reduces transaction costs and enhances contract performance.

  2. Removal of On-Chain Simulation Functions

    • V7 removes on-chain simulation functions, moving them off-chain for bundlers.
    • This change optimizes contract efficiency by reducing the contract size and focusing on essential on-chain operations.

  3. Introduction of delegateAndRevert() Helper

    • V7 adds a delegateAndRevert() function to aid networks without state overrides.
    • This ensures reliable validation and gas estimation across different network configurations.

  4. ERC-165 Support

    • V7 implements the ERC-165 supportsInterface method.
    • This enhancement improves interoperability by allowing other contracts to detect EntryPoint's supported features programmatically.

  5. Token Paymaster Template

    • V7 provides a sample Token Paymaster implementation.
    • This template demonstrates how to create paymasters that use ERC-20 tokens for transaction fee sponsorship.

  6. Penalty for Unused Gas

    • V7 introduces a 10% penalty on unused gas limits.
    • This change encourages more efficient gas usage and optimizes network resources.

  7. Streamlined Post-Operation Calls

    • V7 simplifies the post-operation process by eliminating redundant postOp calls.
    • The execution flow is now more straightforward, with a single call handling necessary after-transaction tasks.

  8. Enhanced Gas Limit Specifications

    • V7 provides clearer guidelines for gas estimation, including specifications for validatePaymasterUserOp and postOp.
    • These improvements enhance security and help prevent certain types of attacks.

  9. Structural Adjustments

    • V7 separates off-chain and on-chain representations of UserOperations.
    • This change optimizes on-chain data handling, reducing transaction costs and improving clarity.

  10. Improved Developer Tools

    • V7 offers enhanced resources for creating AA-enabled dApps, making it easier for developers to integrate Account Abstraction features.

These functional differences make EntryPointV7 a more robust, efficient, and secure version compared to EntryPointV6. The improvements address various limitations of the previous version and pave the way for more advanced implementations of Account Abstraction in the Ethereum ecosystem. These changes reflect the ongoing commitment to making Ethereum more accessible, secure, and versatile for both developers and users.

INFO

EntryPoint v0.6.0 address: 0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789

EntryPointV7 address: 0x0000000071727De22E5E9d8BAf0edAc6f37da032