IPaymaster

Interface for a paymaster contract that agrees to pay for the gas costs of a user operation. NOTE: A paymaster must hold a stake to cover the required entrypoint stake and also the gas for the transaction.

Functions

validatePaymasterUserOp

Validates whether the paymaster is willing to pay for the user operation. See IAccount-validateUserOp for additional information on the return value. NOTE: Bundlers will reject this method if it modifies the state, unless it's whitelisted.

function validatePaymasterUserOp(PackedUserOperation calldata userOp, bytes32 userOpHash, uint256 maxCost)
    external
    returns (bytes memory context, uint256 validationData);

postOp

Verifies the sender is the entrypoint.

function postOp(PostOpMode mode, bytes calldata context, uint256 actualGasCost, uint256 actualUserOpFeePerGas)
    external;

Parameters

Enums

PostOpMode

enum PostOpMode {
    opSucceeded,
    opReverted,
    postOpReverted
}