Function: _validatePaymasterUserOp(UserOperation calldata userOp, bytes32 userOpHash, uint256 requiredPreFund)

This function is used to verify that the UserOperation's Paymaster data were signed by the external signer.

Inputs

• userOp

  • Control: Fully controlled by user.

  • Constraints: All fields are used in signature validation and thus must be valid.

  • Impact: This is the UserOperation being validated.

• requiredPreFund

  • Control: Partially controlled by user.

  • Constraints: Must be sufficient to pay for the gas fees for this user operation.

  • Impact: This is the required amount of prefunding for the Paymaster, calculated using the userOp argument.

Branches and code coverage (including function calls)

Intended branches

• Succeeds with valid gas limit, userOp, and requiredPrefund.

  Test coverage

Negative behavior

• Invalid signature causes error to be returned.

  Negative test

• Insufficient requiredPrefund causes revert.

  Negative test

• Insufficient userOp.verificationGasLimit causes revert.

  Negative test

• Parsing invalid Paymaster data causes revert.

  Negative test