Automated Trade Finance

What it does:
Automates trade finance processes such as letters of credit, invoices, and payments between importers, exporters, and banks using smart contracts.

Why it matters:
Reduces intermediaries, speeds up trade settlements, lowers risk of fraud, and ensures transparency and enforceable contracts in global trade.

How it works:

Exporters and importers register trade agreements and invoices on-chain
Smart contracts lock funds in escrow until predefined conditions are met (e.g., shipment confirmation, inspection, customs clearance)
Payment is automatically released when all conditions are verified
Trade events and document approvals are recorded immutably
Dispute resolution or partial payments can be handled via multi-signature rules
Integrates with logistics, supply chain tracking, and compliance audits
Dashboards allow stakeholders to monitor the status of trade finance transactions

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

import "@openzeppelin/contracts/access/Ownable.sol";

/**
 * @title AutomatedTradeFinance
 * @author Nam
 * @notice Automates trade finance payments and letters of credit on-chain
 */
contract AutomatedTradeFinance is Ownable {

    struct Trade {
        address payable importer;
        address payable exporter;
        uint256 amount;
        bool shipmentConfirmed;
        bool inspectionPassed;
        bool paymentReleased;
    }

    mapping(uint256 =&gt; Trade) public trades;
    uint256 public tradeCount;

    mapping(address =&gt; bool) public inspectors;

    // -------------------- EVENTS --------------------

    event TradeCreated(uint256 indexed tradeId, address importer, address exporter, uint256 amount);
    event ShipmentConfirmed(uint256 indexed tradeId);
    event InspectionPassed(uint256 indexed tradeId);
    event PaymentReleased(uint256 indexed tradeId, uint256 amount);
    event InspectorApproved(address inspector);

    // -------------------- INSPECTOR MANAGEMENT --------------------

    function approveInspector(address _inspector) external onlyOwner {
        inspectors[_inspector] = true;
        emit InspectorApproved(_inspector);
    }

    function revokeInspector(address _inspector) external onlyOwner {
        inspectors[_inspector] = false;
    }

    // -------------------- TRADE MANAGEMENT --------------------

    function createTrade(address payable _exporter) external payable {
        require(msg.value &gt; 0, "Payment required");
        tradeCount += 1;

        trades[tradeCount] = Trade({
            importer: payable(msg.sender),
            exporter: _exporter,
            amount: msg.value,
            shipmentConfirmed: false,
            inspectionPassed: false,
            paymentReleased: false
        });

        emit TradeCreated(tradeCount, msg.sender, _exporter, msg.value);
    }

    // -------------------- TRADE CONDITIONS --------------------

    function confirmShipment(uint256 _tradeId) external {
        Trade storage t = trades[_tradeId];
        require(msg.sender == t.exporter, "Only exporter can confirm shipment");
        require(!t.shipmentConfirmed, "Shipment already confirmed");

        t.shipmentConfirmed = true;
        emit ShipmentConfirmed(_tradeId);
    }

    function passInspection(uint256 _tradeId) external {
        require(inspectors[msg.sender], "Not authorized inspector");

        Trade storage t = trades[_tradeId];
        require(t.shipmentConfirmed, "Shipment not confirmed");
        require(!t.inspectionPassed, "Inspection already passed");

        t.inspectionPassed = true;
        emit InspectionPassed(_tradeId);
    }

    // -------------------- PAYMENT RELEASE --------------------

    function releasePayment(uint256 _tradeId) external {
        Trade storage t = trades[_tradeId];
        require(t.shipmentConfirmed, "Shipment not confirmed");
        require(t.inspectionPassed, "Inspection not passed");
        require(!t.paymentReleased, "Payment already released");

        t.paymentReleased = true;
        t.exporter.transfer(t.amount);
        emit PaymentReleased(_tradeId, t.amount);
    }
}