smom-dbis-138/contracts/mainnet-checkpoint/extensions/L2OracleAdapterExtension.sol

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

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

/// @notice Records L2 oracle feed snapshots alongside batches (extensible to Chainlink streams).
contract L2OracleAdapterExtension is CheckpointExtensionBase {
    struct OracleSnapshot {
        bytes32 feedId;
        int256 answer;
        uint256 updatedAt;
    }

    mapping(uint64 => OracleSnapshot[]) public batchOracles;

    event OracleSnapshotRecorded(uint64 indexed batchId, bytes32 feedId, int256 answer);

    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;
        OracleSnapshot[] memory snaps = abi.decode(data, (OracleSnapshot[]));
        for (uint256 i = 0; i < snaps.length; i++) {
            batchOracles[header.batchId].push(snaps[i]);
            emit OracleSnapshotRecorded(header.batchId, snaps[i].feedId, snaps[i].answer);
        }
    }

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