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Implement the execution interface

Overview​

The IExecution contract allows executing an Order, getting a list of authorized callers, and checking the execution status. You can use this execution interface to create custom Orders.

Directory

Store IExecution in the /src directory, alongside with other contracts.

Full code

You can find the full code on GitHub: /src/IExecution.sol

Create the IExecution contract​

Implement the execution interface in a file IExecution.sol:

/src/IExecution.sol
interface IExecution {
    // Check if an Order can be executed
    function canExecute() external view returns (bool);
    
    // Execute an Order
    function execute(
        uint256 nonce,
        uint256 gas,
        uint256 gasPrice,
        uint256 maxPriorityFeePerGas,  // for EIP-1559 transactions
        uint256 maxFeePerGas           // for EIP-1559 transactions
    ) external returns (bool, bytes32);
    
    // Get a list of authorized callers
    function callers() external returns (Caller[] memory callersList);
    
    // Check the execution status
    function isExecuted() external returns (bool);
}

Next steps​