FXMacroData Chainlink Integration

// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import {ChainlinkClient, Chainlink} from "@chainlink/contracts/src/v0.8/ChainlinkClient.sol"; import {ConfirmedOwner} from "@chainlink/contracts/src/v0.8/shared/access/ConfirmedOwner.sol"; /// @notice Reads the USD Fed Funds Rate via the FXMacroData External Adapter. /// @dev The on-chain value is stored as basis-points × 100. /// E.g. 4.25 % is stored as 425. Divide by 100 to get the rate as a float. contract FXMacroDataConsumer is ChainlinkClient, ConfirmedOwner { using Chainlink for Chainlink.Request; uint256 public policyRate; // e.g. 425 = 4.25 % bytes32 private immutable jobId; uint256 private immutable fee; // LINK payment (1e18 = 1 LINK) event PolicyRateUpdated(uint256 rate); constructor( address _linkToken, address _oracle, bytes32 _jobId, uint256 _feeLinkWei ) ConfirmedOwner(msg.sender) { _setChainlinkToken(_linkToken); _setChainlinkOracle(_oracle); jobId = _jobId; fee = _feeLinkWei; } /// @notice Sends a Chainlink request to fetch the latest USD policy rate. function requestPolicyRate() external onlyOwner returns (bytes32 requestId) { Chainlink.Request memory req = _buildChainlinkRequest( jobId, address(this), this.fulfill.selector ); return _sendChainlinkRequest(req, fee); } /// @notice Chainlink node calls this after the job completes. function fulfill(bytes32 /*requestId*/, uint256 _rate) external recordChainlinkFulfillment(msg.sender) { policyRate = _rate; emit PolicyRateUpdated(_rate); } /// @notice Withdraw remaining LINK balance to the owner. function withdrawLink() external onlyOwner { LinkTokenInterface link = LinkTokenInterface(_chainlinkTokenAddress()); require(link.transfer(msg.sender, link.balanceOf(address(this))), "Transfer failed"); } }