smom-dbis-138/contracts/mainnet-checkpoint/extensions/CwTransportLinkExtension.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {CheckpointExtensionBase} from "./CheckpointExtensionBase.sol";
import {CheckpointStorage} from "../storage/CheckpointStorage.sol";
import {CheckpointLeaf} from "../libraries/CheckpointLeaf.sol";

/// @notice Emits bridge hints only — does not mint cW tokens.
contract CwTransportLinkExtension is CheckpointExtensionBase {
    event BridgeHint(uint64 indexed batchId, address indexed recipient, address token, uint256 amount);

    function HOOK_BEFORE_SUBMIT() external pure override returns (uint32) {
        return 0;
    }

    function HOOK_AFTER_SUBMIT() external pure override returns (uint32) {
        return 1 << 1;
    }

    function HOOK_ON_CCIP() external pure override returns (uint32) {
        return 0;
    }

    function beforeSubmit(CheckpointStorage.CheckpointHeader calldata, bytes calldata) external pure override {}

    function afterSubmit(CheckpointStorage.CheckpointHeader calldata header, bytes calldata data) external {
        if (data.length == 0) return;
        CheckpointLeaf.PaymentLeafV1[] memory leaves = abi.decode(data, (CheckpointLeaf.PaymentLeafV1[]));
        for (uint256 i = 0; i < leaves.length; i++) {
            emit BridgeHint(header.batchId, leaves[i].to, address(0), leaves[i].value);
        }
    }

    function onCCIPReceive(bytes calldata) external pure override {}
}