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ERC-4337 Transaction Flow

The following diagram illustrates how SBC's Account Abstraction implementation works using ERC-4337:

ERC-4337 Transaction Flow

Flow Explanation

  1. User Submission: The user creates and signs a UserOperation, which is like a transaction but with more flexibility.

  2. Bundler Processing: SBC's bundler service:

    • Validates the UserOperation
    • Bundles it with other operations for efficiency
    • Submits the bundle to the EntryPoint contract

  3. Wallet Validation: The EntryPoint contract validates:

    • The wallet's signature
    • The operation's validity
    • Required permissions

  4. Gas Handling: Instead of users paying gas:

    • The EntryPoint coordinates with the SBC Paymaster
    • Gas costs are covered in SBC tokens
    • Users don't need native tokens (ETH)

  5. Payment Authorization: The Paymaster:

    • Verifies the user has sufficient SBC balance
    • Authorizes the gas payment
    • Manages gas sponsorship rules

  6. Execution: Finally:

    • The EntryPoint executes the validated operation
    • The target contract receives the call
    • The transaction is completed without user gas fees