```\\nfunction _getRequiredPrefund(MemoryUserOp memory mUserOp) internal pure returns (uint256 requiredPrefund) {\\nunchecked {\\n    //when using a Paymaster, the verificationGasLimit is used also to as a limit for the postOp call.\\n    // our security model might call postOp eventually twice\\n    uint256 mul = mUserOp.paymaster != address(0) ? 3 : 1;\\n    uint256 requiredGas = mUserOp.callGasLimit + mUserOp.verificationGasLimit * mul + mUserOp.preVerificationGas;\\n\\n    requiredPrefund = requiredGas * mUserOp.maxFeePerGas;\\n}\\n}\\n```\\n