// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

/// @title ArcPay Router
/// @notice Routes native USDC on Arc directly to a recipient-controlled wallet.
/// @dev There is no owner, custody, withdrawal function, or mutable configuration.
contract ArcPayRouter {
    error InvalidRecipient();
    error ZeroAmount();
    error TransferFailed();

    event PaymentRouted(
        bytes32 indexed paymentId,
        address indexed sender,
        address indexed recipient,
        uint256 amount
    );

    function route(bytes32 paymentId, address payable recipient) external payable {
        if (recipient == address(0)) revert InvalidRecipient();
        if (msg.value == 0) revert ZeroAmount();

        (bool sent, ) = recipient.call{value: msg.value}("");
        if (!sent) revert TransferFailed();

        emit PaymentRouted(paymentId, msg.sender, recipient, msg.value);
    }

    receive() external payable {
        revert TransferFailed();
    }

    fallback() external payable {
        revert TransferFailed();
    }
}