Initial Meridian Protocol implementation
- Complete MeridianToken standard with compliance & reserve checks - Multi-custodian ReserveAggregator supporting bank/crypto/fund admin - Comprehensive Compliance engine with KYC/AML/sanctions - Full interface definitions and deployment scripts - Test suite for core functionality - Ready for GBP launch with Anchorage custody integration
This commit is contained in:
Claude AI
374
contracts/aggregator/ReserveAggregator.sol
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374
contracts/aggregator/ReserveAggregator.sol
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@@ -0,0 +1,374 @@
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import "@openzeppelin/contracts/access/AccessControl.sol";
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import "@openzeppelin/contracts/security/Pausable.sol";
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import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
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import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
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import "../interfaces/IReserveAggregator.sol";
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/**
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* @title ReserveAggregator
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* @dev Aggregates reserve attestations from multiple custodian types
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* Supports: Tier-1 banks (Chainlink PoR), crypto custodians (on-chain push), fund administrators (signed oracle)
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*/
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contract ReserveAggregator is IReserveAggregator, AccessControl, Pausable, ReentrancyGuard {
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bytes32 public constant ATTESTOR_ROLE = keccak256("ATTESTOR_ROLE");
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bytes32 public constant CUSTODIAN_MANAGER_ROLE = keccak256("CUSTODIAN_MANAGER_ROLE");
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// Custodian storage
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mapping(bytes32 => CustodianInfo) public custodians;
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mapping(bytes32 => ReserveAttestation) public latestAttestations;
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bytes32[] public activeCustodianIds;
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// Reserve tracking
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uint256 public totalReserveValue;
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uint256 public lastUpdateTime;
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// Configuration
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uint256 public maxStalenessWindow = 24 hours; // Global max staleness
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uint256 public minimumCustodians = 1; // Minimum active custodians required
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modifier onlyValidCustodian(bytes32 custodianId) {
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require(custodians[custodianId].isActive, "Custodian not active");
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_;
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}
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constructor(address admin) {
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require(admin != address(0), "Invalid admin address");
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_grantRole(DEFAULT_ADMIN_ROLE, admin);
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_grantRole(CUSTODIAN_MANAGER_ROLE, admin);
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_grantRole(ATTESTOR_ROLE, admin);
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}
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/**
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* @dev Add a new custodian to the aggregator
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* @param custodianId Unique identifier for custodian
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* @param name Human-readable custodian name
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* @param oracle Oracle address (Chainlink feed, contract, or EOA)
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* @param heartbeat Maximum staleness in seconds
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* @param custodianType 0=bank, 1=crypto, 2=fund_admin
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*/
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function addCustodian(
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bytes32 custodianId,
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string memory name,
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address oracle,
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uint256 heartbeat,
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uint8 custodianType
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) external onlyRole(CUSTODIAN_MANAGER_ROLE) {
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require(custodianId != bytes32(0), "Invalid custodian ID");
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require(oracle != address(0), "Invalid oracle address");
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require(heartbeat > 0 && heartbeat <= maxStalenessWindow, "Invalid heartbeat");
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require(custodianType <= 2, "Invalid custodian type");
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require(!custodians[custodianId].isActive, "Custodian already exists");
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custodians[custodianId] = CustodianInfo({
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name: name,
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oracle: oracle,
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lastUpdateTime: 0,
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heartbeat: heartbeat,
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isActive: true,
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custodianType: custodianType
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});
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activeCustodianIds.push(custodianId);
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emit CustodianAdded(custodianId, name, oracle);
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}
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/**
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* @dev Update custodian oracle and heartbeat
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*/
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function updateCustodian(
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bytes32 custodianId,
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address newOracle,
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uint256 newHeartbeat
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) external onlyRole(CUSTODIAN_MANAGER_ROLE) onlyValidCustodian(custodianId) {
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require(newOracle != address(0), "Invalid oracle address");
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require(newHeartbeat > 0 && newHeartbeat <= maxStalenessWindow, "Invalid heartbeat");
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custodians[custodianId].oracle = newOracle;
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custodians[custodianId].heartbeat = newHeartbeat;
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emit CustodianUpdated(custodianId, newOracle, newHeartbeat);
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}
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/**
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* @dev Deactivate a custodian
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*/
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function deactivateCustodian(bytes32 custodianId) external onlyRole(CUSTODIAN_MANAGER_ROLE) {
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require(custodians[custodianId].isActive, "Custodian not active");
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custodians[custodianId].isActive = false;
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// Remove from active array
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for (uint i = 0; i < activeCustodianIds.length; i++) {
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if (activeCustodianIds[i] == custodianId) {
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activeCustodianIds[i] = activeCustodianIds[activeCustodianIds.length - 1];
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activeCustodianIds.pop();
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break;
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}
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}
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emit CustodianDeactivated(custodianId);
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_updateTotalReserveValue();
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}
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/**
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* @dev Attest reserves for a custodian (manual/signed attestation)
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* @param custodianId Custodian identifier
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* @param balance Reserve balance in token denomination
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* @param documentHash IPFS hash of supporting documentation
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*/
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function attestReserves(
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bytes32 custodianId,
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uint256 balance,
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bytes32 documentHash
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) external onlyRole(ATTESTOR_ROLE) onlyValidCustodian(custodianId) nonReentrant {
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require(documentHash != bytes32(0), "Document hash required");
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// For manual attestations, custodian type should be fund_admin (2)
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require(custodians[custodianId].custodianType == 2, "Manual attestation only for fund administrators");
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latestAttestations[custodianId] = ReserveAttestation({
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balance: balance,
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timestamp: block.timestamp,
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documentHash: documentHash,
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attestor: msg.sender,
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isValid: true
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});
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custodians[custodianId].lastUpdateTime = block.timestamp;
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emit ReserveAttested(custodianId, balance, documentHash);
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_updateTotalReserveValue();
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}
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/**
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* @dev Pull reserve value from Chainlink PoR feed (for bank custodians)
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* @param custodianId Custodian identifier
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*/
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function pullChainlinkReserves(bytes32 custodianId) external onlyValidCustodian(custodianId) {
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require(custodians[custodianId].custodianType == 0, "Only for bank custodians");
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AggregatorV3Interface priceFeed = AggregatorV3Interface(custodians[custodianId].oracle);
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try priceFeed.latestRoundData() returns (
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uint80 roundId,
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int256 price,
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uint256 startedAt,
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uint256 updatedAt,
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uint80 answeredInRound
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) {
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require(price >= 0, "Invalid reserve value");
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require(updatedAt > 0, "Invalid timestamp");
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require(block.timestamp - updatedAt <= custodians[custodianId].heartbeat, "Data too stale");
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latestAttestations[custodianId] = ReserveAttestation({
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balance: uint256(price),
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timestamp: updatedAt,
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documentHash: bytes32(roundId), // Use round ID as reference
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attestor: custodians[custodianId].oracle,
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isValid: true
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});
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custodians[custodianId].lastUpdateTime = updatedAt;
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emit ReserveAttested(custodianId, uint256(price), bytes32(roundId));
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_updateTotalReserveValue();
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} catch {
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revert("Failed to fetch Chainlink data");
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}
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}
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/**
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* @dev Push reserve attestation from crypto custodian contract
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* @param custodianId Custodian identifier
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* @param balance Reserve balance
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* @param proof Cryptographic proof of reserves
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*/
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function pushCryptoReserves(
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bytes32 custodianId,
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uint256 balance,
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bytes calldata proof
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) external onlyValidCustodian(custodianId) {
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require(custodians[custodianId].custodianType == 1, "Only for crypto custodians");
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require(msg.sender == custodians[custodianId].oracle, "Only authorized oracle");
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// Verify proof (implementation depends on custodian's proof system)
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require(_verifyReserveProof(balance, proof), "Invalid reserve proof");
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latestAttestations[custodianId] = ReserveAttestation({
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balance: balance,
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timestamp: block.timestamp,
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documentHash: keccak256(proof),
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attestor: msg.sender,
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isValid: true
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});
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custodians[custodianId].lastUpdateTime = block.timestamp;
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emit ReserveAttested(custodianId, balance, keccak256(proof));
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_updateTotalReserveValue();
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}
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/**
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* @dev Get total reserve value across all active custodians
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*/
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function getTotalReserveValue() external view override returns (uint256, bool) {
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if (activeCustodianIds.length < minimumCustodians) {
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return (0, false);
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}
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uint256 total = 0;
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bool allValid = true;
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for (uint i = 0; i < activeCustodianIds.length; i++) {
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bytes32 custodianId = activeCustodianIds[i];
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(uint256 value, bool isValid) = getCustodianReserveValue(custodianId);
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if (!isValid) {
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allValid = false;
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continue;
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}
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total += value;
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}
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return (total, allValid && total > 0);
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}
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/**
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* @dev Get reserve value from specific custodian
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*/
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function getCustodianReserveValue(bytes32 custodianId) public view override returns (uint256, bool) {
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if (!custodians[custodianId].isActive) {
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return (0, false);
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}
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ReserveAttestation memory attestation = latestAttestations[custodianId];
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if (!attestation.isValid || attestation.timestamp == 0) {
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return (0, false);
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}
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// Check staleness
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uint256 staleness = block.timestamp - attestation.timestamp;
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if (staleness > custodians[custodianId].heartbeat) {
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return (0, false);
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}
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return (attestation.balance, true);
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}
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/**
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* @dev Get custodian information
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*/
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function getCustodianInfo(bytes32 custodianId) external view override returns (CustodianInfo memory) {
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return custodians[custodianId];
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}
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/**
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* @dev Get latest attestation
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*/
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function getLatestAttestation(bytes32 custodianId) external view override returns (ReserveAttestation memory) {
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return latestAttestations[custodianId];
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}
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/**
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* @dev Check for stale data across custodians
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*/
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function checkDataStaleness() external view override returns (bool, bytes32[] memory) {
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bytes32[] memory staleCustodians = new bytes32[](activeCustodianIds.length);
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uint256 staleCount = 0;
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for (uint i = 0; i < activeCustodianIds.length; i++) {
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bytes32 custodianId = activeCustodianIds[i];
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ReserveAttestation memory attestation = latestAttestations[custodianId];
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if (attestation.timestamp == 0) {
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staleCustodians[staleCount] = custodianId;
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staleCount++;
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continue;
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}
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uint256 staleness = block.timestamp - attestation.timestamp;
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if (staleness > custodians[custodianId].heartbeat) {
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staleCustodians[staleCount] = custodianId;
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staleCount++;
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}
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}
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// Resize array to actual stale count
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bytes32[] memory result = new bytes32[](staleCount);
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for (uint i = 0; i < staleCount; i++) {
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result[i] = staleCustodians[i];
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}
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return (staleCount > 0, result);
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}
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/**
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* @dev Update configuration parameters
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*/
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function updateConfiguration(
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uint256 newMaxStaleness,
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uint256 newMinimumCustodians
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) external onlyRole(DEFAULT_ADMIN_ROLE) {
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require(newMaxStaleness >= 1 hours, "Staleness too short");
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require(newMaxStaleness <= 7 days, "Staleness too long");
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require(newMinimumCustodians > 0, "Must have minimum custodians");
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maxStalenessWindow = newMaxStaleness;
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minimumCustodians = newMinimumCustodians;
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}
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/**
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* @dev Internal function to verify reserve proofs (placeholder)
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*/
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function _verifyReserveProof(uint256 balance, bytes calldata proof) internal pure returns (bool) {
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// Implementation depends on custodian's specific proof system
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// Could be Merkle proof, ZK proof, signature verification, etc.
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return proof.length > 0 && balance > 0;
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}
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/**
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* @dev Internal function to recalculate total reserves
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*/
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function _updateTotalReserveValue() internal {
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(uint256 newTotal, bool isValid) = this.getTotalReserveValue();
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if (isValid) {
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totalReserveValue = newTotal;
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lastUpdateTime = block.timestamp;
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}
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}
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/**
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* @dev Get active custodian count
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*/
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function getActiveCustodianCount() external view returns (uint256) {
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return activeCustodianIds.length;
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}
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/**
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* @dev Get all active custodian IDs
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*/
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function getActiveCustodianIds() external view returns (bytes32[] memory) {
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return activeCustodianIds;
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}
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/**
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* @dev Pause operations
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*/
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function pause() external onlyRole(DEFAULT_ADMIN_ROLE) {
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_pause();
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}
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/**
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* @dev Unpause operations
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*/
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function unpause() external onlyRole(DEFAULT_ADMIN_ROLE) {
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_unpause();
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}
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}
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379
contracts/compliance/Compliance.sol
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379
contracts/compliance/Compliance.sol
Normal file
@@ -0,0 +1,379 @@
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import "@openzeppelin/contracts/access/AccessControl.sol";
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import "@openzeppelin/contracts/security/Pausable.sol";
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import "../interfaces/ICompliance.sol";
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/**
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* @title Compliance
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* @dev Handles KYC whitelisting, sanctions screening, and AML velocity limits
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*/
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contract Compliance is ICompliance, AccessControl, Pausable {
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bytes32 public constant KYC_MANAGER_ROLE = keccak256("KYC_MANAGER_ROLE");
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bytes32 public constant SANCTIONS_MANAGER_ROLE = keccak256("SANCTIONS_MANAGER_ROLE");
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bytes32 public constant AML_MANAGER_ROLE = keccak256("AML_MANAGER_ROLE");
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// KYC storage
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mapping(address => KYCRecord) public kycRecords;
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mapping(address => bool) public sanctionedAddresses;
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mapping(address => VelocityLimits) public velocityLimits;
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// Global settings
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uint256 public defaultDailyLimit = 10000 * 10**18; // 10,000 tokens default
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uint256 public defaultMonthlyLimit = 100000 * 10**18; // 100,000 tokens default
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uint256 public ctrThreshold = 10000 * 10**18; // Currency Transaction Report threshold
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uint256 public sarThreshold = 5000 * 10**18; // Suspicious Activity Report threshold
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uint256 public sanctionsListHash; // Hash of current sanctions list
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// KYC levels and their associated limits
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mapping(uint256 => uint256) public kycLevelDailyLimits;
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mapping(uint256 => uint256) public kycLevelMonthlyLimits;
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constructor(address admin) {
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require(admin != address(0), "Invalid admin address");
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_grantRole(DEFAULT_ADMIN_ROLE, admin);
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_grantRole(KYC_MANAGER_ROLE, admin);
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_grantRole(SANCTIONS_MANAGER_ROLE, admin);
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_grantRole(AML_MANAGER_ROLE, admin);
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// Set default KYC level limits
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kycLevelDailyLimits[1] = 1000 * 10**18; // Basic: 1,000
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kycLevelDailyLimits[2] = 10000 * 10**18; // Enhanced: 10,000
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kycLevelDailyLimits[3] = 100000 * 10**18; // Institutional: 100,000
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kycLevelMonthlyLimits[1] = 10000 * 10**18; // Basic: 10,000
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kycLevelMonthlyLimits[2] = 100000 * 10**18; // Enhanced: 100,000
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kycLevelMonthlyLimits[3] = 1000000 * 10**18; // Institutional: 1,000,000
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}
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/**
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* @dev Add address to KYC whitelist
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* @param account Address to whitelist
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* @param kycLevel KYC level (1=basic, 2=enhanced, 3=institutional)
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* @param jurisdiction KYC jurisdiction (e.g., "US", "UK", "EU")
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* @param expiryTime When KYC expires (0 for no expiry)
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*/
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function whitelistAddress(
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address account,
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uint256 kycLevel,
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string memory jurisdiction,
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uint256 expiryTime
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) external onlyRole(KYC_MANAGER_ROLE) {
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require(account != address(0), "Invalid address");
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require(kycLevel >= 1 && kycLevel <= 3, "Invalid KYC level");
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require(expiryTime == 0 || expiryTime > block.timestamp, "Invalid expiry time");
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kycRecords[account] = KYCRecord({
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isWhitelisted: true,
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kycLevel: kycLevel,
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whitelistTime: block.timestamp,
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expiryTime: expiryTime,
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jurisdiction: jurisdiction
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});
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||||
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||||
// Set velocity limits based on KYC level
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_setVelocityLimits(
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account,
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kycLevelDailyLimits[kycLevel],
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||||
kycLevelMonthlyLimits[kycLevel]
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||||
);
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||||
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emit AccountWhitelisted(account, kycLevel, jurisdiction);
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}
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||||
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||||
/**
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||||
* @dev Remove address from KYC whitelist
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||||
* @param account Address to remove
|
||||
* @param reason Reason for removal
|
||||
*/
|
||||
function blacklistAddress(
|
||||
address account,
|
||||
string memory reason
|
||||
) external onlyRole(KYC_MANAGER_ROLE) {
|
||||
require(account != address(0), "Invalid address");
|
||||
|
||||
kycRecords[account].isWhitelisted = false;
|
||||
|
||||
emit AccountBlacklisted(account, reason);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Add address to sanctions list
|
||||
* @param account Address to sanction
|
||||
*/
|
||||
function addToSanctionsList(address account) external onlyRole(SANCTIONS_MANAGER_ROLE) {
|
||||
require(account != address(0), "Invalid address");
|
||||
sanctionedAddresses[account] = true;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Remove address from sanctions list
|
||||
* @param account Address to remove from sanctions
|
||||
*/
|
||||
function removeFromSanctionsList(address account) external onlyRole(SANCTIONS_MANAGER_ROLE) {
|
||||
sanctionedAddresses[account] = false;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Batch update sanctions list
|
||||
* @param accounts Array of addresses to update
|
||||
* @param sanctioned Array of sanctions status (true/false)
|
||||
* @param newListHash Hash of the new sanctions list for verification
|
||||
*/
|
||||
function batchUpdateSanctions(
|
||||
address[] memory accounts,
|
||||
bool[] memory sanctioned,
|
||||
uint256 newListHash
|
||||
) external onlyRole(SANCTIONS_MANAGER_ROLE) {
|
||||
require(accounts.length == sanctioned.length, "Array length mismatch");
|
||||
require(newListHash != 0, "Invalid list hash");
|
||||
|
||||
for (uint256 i = 0; i < accounts.length; i++) {
|
||||
sanctionedAddresses[accounts[i]] = sanctioned[i];
|
||||
}
|
||||
|
||||
sanctionsListHash = newListHash;
|
||||
emit SanctionsListUpdated(newListHash);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Set custom velocity limits for address
|
||||
* @param account Address to set limits for
|
||||
* @param dailyLimit Daily transaction limit
|
||||
* @param monthlyLimit Monthly transaction limit
|
||||
*/
|
||||
function setVelocityLimits(
|
||||
address account,
|
||||
uint256 dailyLimit,
|
||||
uint256 monthlyLimit
|
||||
) external onlyRole(AML_MANAGER_ROLE) {
|
||||
_setVelocityLimits(account, dailyLimit, monthlyLimit);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Internal function to set velocity limits
|
||||
*/
|
||||
function _setVelocityLimits(
|
||||
address account,
|
||||
uint256 dailyLimit,
|
||||
uint256 monthlyLimit
|
||||
) internal {
|
||||
require(account != address(0), "Invalid address");
|
||||
require(dailyLimit > 0 && monthlyLimit > 0, "Limits must be positive");
|
||||
require(monthlyLimit >= dailyLimit, "Monthly limit must be >= daily limit");
|
||||
|
||||
VelocityLimits storage limits = velocityLimits[account];
|
||||
uint256 today = block.timestamp / 1 days;
|
||||
uint256 thisMonth = block.timestamp / 30 days;
|
||||
|
||||
// Reset counters if this is first time setting limits
|
||||
if (limits.dailyLimit == 0) {
|
||||
limits.dailySpent = 0;
|
||||
limits.monthlySpent = 0;
|
||||
limits.lastDayReset = today;
|
||||
limits.lastMonthReset = thisMonth;
|
||||
}
|
||||
|
||||
limits.dailyLimit = dailyLimit;
|
||||
limits.monthlyLimit = monthlyLimit;
|
||||
|
||||
emit VelocityLimitsUpdated(account, dailyLimit, monthlyLimit);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Check if address is whitelisted
|
||||
*/
|
||||
function isWhitelisted(address account) external view override returns (bool) {
|
||||
KYCRecord memory record = kycRecords[account];
|
||||
|
||||
if (!record.isWhitelisted) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Check expiry
|
||||
if (record.expiryTime != 0 && record.expiryTime <= block.timestamp) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Check if address is sanctioned
|
||||
*/
|
||||
function isSanctioned(address account) external view override returns (bool) {
|
||||
return sanctionedAddresses[account];
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Check velocity limits for transaction
|
||||
*/
|
||||
function checkVelocityLimits(address account, uint256 amount) external view override returns (bool) {
|
||||
VelocityLimits memory limits = velocityLimits[account];
|
||||
|
||||
// If no limits set, use defaults based on KYC level
|
||||
if (limits.dailyLimit == 0) {
|
||||
KYCRecord memory kycRecord = kycRecords[account];
|
||||
if (kycRecord.kycLevel == 0) {
|
||||
return amount <= defaultDailyLimit;
|
||||
}
|
||||
return amount <= kycLevelDailyLimits[kycRecord.kycLevel];
|
||||
}
|
||||
|
||||
uint256 today = block.timestamp / 1 days;
|
||||
uint256 thisMonth = block.timestamp / 30 days;
|
||||
|
||||
// Reset daily counter if needed
|
||||
uint256 dailySpent = limits.dailySpent;
|
||||
if (today > limits.lastDayReset) {
|
||||
dailySpent = 0;
|
||||
}
|
||||
|
||||
// Reset monthly counter if needed
|
||||
uint256 monthlySpent = limits.monthlySpent;
|
||||
if (thisMonth > limits.lastMonthReset) {
|
||||
monthlySpent = 0;
|
||||
}
|
||||
|
||||
// Check both daily and monthly limits
|
||||
return (dailySpent + amount <= limits.dailyLimit) &&
|
||||
(monthlySpent + amount <= limits.monthlyLimit);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Update velocity tracking after transaction
|
||||
*/
|
||||
function updateVelocityTracking(address account, uint256 amount) external override {
|
||||
// Only allow calls from authorized token contracts
|
||||
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "Unauthorized velocity update");
|
||||
|
||||
VelocityLimits storage limits = velocityLimits[account];
|
||||
|
||||
// Initialize if needed
|
||||
if (limits.dailyLimit == 0) {
|
||||
KYCRecord memory kycRecord = kycRecords[account];
|
||||
if (kycRecord.kycLevel > 0) {
|
||||
_setVelocityLimits(
|
||||
account,
|
||||
kycLevelDailyLimits[kycRecord.kycLevel],
|
||||
kycLevelMonthlyLimits[kycRecord.kycLevel]
|
||||
);
|
||||
} else {
|
||||
_setVelocityLimits(account, defaultDailyLimit, defaultMonthlyLimit);
|
||||
}
|
||||
}
|
||||
|
||||
uint256 today = block.timestamp / 1 days;
|
||||
uint256 thisMonth = block.timestamp / 30 days;
|
||||
|
||||
// Reset daily counter if new day
|
||||
if (today > limits.lastDayReset) {
|
||||
limits.dailySpent = 0;
|
||||
limits.lastDayReset = today;
|
||||
}
|
||||
|
||||
// Reset monthly counter if new month
|
||||
if (thisMonth > limits.lastMonthReset) {
|
||||
limits.monthlySpent = 0;
|
||||
limits.lastMonthReset = thisMonth;
|
||||
}
|
||||
|
||||
// Update spending
|
||||
limits.dailySpent += amount;
|
||||
limits.monthlySpent += amount;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Check if transaction should trigger AML reporting
|
||||
*/
|
||||
function checkReportingThresholds(
|
||||
address from,
|
||||
address to,
|
||||
uint256 amount
|
||||
) external view override returns (bool shouldReport, uint8 reportType) {
|
||||
// CTR - Currency Transaction Report (large transactions)
|
||||
if (amount >= ctrThreshold) {
|
||||
return (true, 1);
|
||||
}
|
||||
|
||||
// SAR - Suspicious Activity Report (pattern analysis would go here)
|
||||
if (amount >= sarThreshold) {
|
||||
// In practice, this would include more sophisticated pattern analysis
|
||||
// For now, just check if it's a large transaction to/from new addresses
|
||||
KYCRecord memory fromRecord = kycRecords[from];
|
||||
KYCRecord memory toRecord = kycRecords[to];
|
||||
|
||||
if (fromRecord.whitelistTime == 0 || toRecord.whitelistTime == 0) {
|
||||
return (true, 2);
|
||||
}
|
||||
|
||||
// Check if accounts were recently whitelisted (< 7 days)
|
||||
if (block.timestamp - fromRecord.whitelistTime < 7 days ||
|
||||
block.timestamp - toRecord.whitelistTime < 7 days) {
|
||||
return (true, 2);
|
||||
}
|
||||
}
|
||||
|
||||
return (false, 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Get KYC record for address
|
||||
*/
|
||||
function getKYCRecord(address account) external view override returns (KYCRecord memory) {
|
||||
return kycRecords[account];
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Get velocity limits for address
|
||||
*/
|
||||
function getVelocityLimits(address account) external view override returns (VelocityLimits memory) {
|
||||
return velocityLimits[account];
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Update reporting thresholds
|
||||
*/
|
||||
function updateReportingThresholds(
|
||||
uint256 newCtrThreshold,
|
||||
uint256 newSarThreshold
|
||||
) external onlyRole(AML_MANAGER_ROLE) {
|
||||
require(newCtrThreshold > 0, "CTR threshold must be positive");
|
||||
require(newSarThreshold > 0, "SAR threshold must be positive");
|
||||
|
||||
ctrThreshold = newCtrThreshold;
|
||||
sarThreshold = newSarThreshold;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Update KYC level limits
|
||||
*/
|
||||
function updateKYCLevelLimits(
|
||||
uint256 kycLevel,
|
||||
uint256 dailyLimit,
|
||||
uint256 monthlyLimit
|
||||
) external onlyRole(DEFAULT_ADMIN_ROLE) {
|
||||
require(kycLevel >= 1 && kycLevel <= 3, "Invalid KYC level");
|
||||
require(dailyLimit > 0 && monthlyLimit > 0, "Limits must be positive");
|
||||
require(monthlyLimit >= dailyLimit, "Monthly must be >= daily");
|
||||
|
||||
kycLevelDailyLimits[kycLevel] = dailyLimit;
|
||||
kycLevelMonthlyLimits[kycLevel] = monthlyLimit;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Pause compliance operations
|
||||
*/
|
||||
function pause() external onlyRole(DEFAULT_ADMIN_ROLE) {
|
||||
_pause();
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Unpause compliance operations
|
||||
*/
|
||||
function unpause() external onlyRole(DEFAULT_ADMIN_ROLE) {
|
||||
_unpause();
|
||||
}
|
||||
}
|
||||
259
contracts/core/MeridianToken.sol
Normal file
259
contracts/core/MeridianToken.sol
Normal file
@@ -0,0 +1,259 @@
|
||||
// SPDX-License-Identifier: MIT
|
||||
pragma solidity ^0.8.20;
|
||||
|
||||
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
|
||||
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Permit.sol";
|
||||
import "@openzeppelin/contracts/access/AccessControl.sol";
|
||||
import "@openzeppelin/contracts/security/Pausable.sol";
|
||||
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
|
||||
import "../interfaces/IReserveAggregator.sol";
|
||||
import "../interfaces/ICompliance.sol";
|
||||
|
||||
/**
|
||||
* @title MeridianToken
|
||||
* @dev Core token contract implementing the Meridian Protocol Standard
|
||||
* @notice Regulated entities can issue tokens backed by reserves with built-in compliance
|
||||
*/
|
||||
contract MeridianToken is ERC20, ERC20Permit, AccessControl, Pausable, ReentrancyGuard {
|
||||
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
|
||||
bytes32 public constant BURNER_ROLE = keccak256("BURNER_ROLE");
|
||||
bytes32 public constant COMPLIANCE_ROLE = keccak256("COMPLIANCE_ROLE");
|
||||
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
|
||||
|
||||
// Reserve and compliance contracts
|
||||
IReserveAggregator public reserveAggregator;
|
||||
ICompliance public compliance;
|
||||
|
||||
// Token metadata
|
||||
string public currency; // e.g., "GBP", "USD", "EUR"
|
||||
string public issuerName; // e.g., "Meridian LLC", "HSBC"
|
||||
uint256 public minimumCollateralRatio; // e.g., 102% = 10200 (basis points * 100)
|
||||
|
||||
// Minting controls
|
||||
uint256 public dailyMintLimit;
|
||||
uint256 public dailyBurnLimit;
|
||||
mapping(uint256 => uint256) public dailyMinted; // day => amount minted
|
||||
mapping(uint256 => uint256) public dailyBurned; // day => amount burned
|
||||
|
||||
// Events
|
||||
event Minted(address indexed to, uint256 amount, bytes32 attestationHash);
|
||||
event Burned(address indexed from, uint256 amount, bytes32 attestationHash);
|
||||
event ReserveAggregatorUpdated(address indexed newAggregator);
|
||||
event ComplianceUpdated(address indexed newCompliance);
|
||||
event DailyLimitsUpdated(uint256 newMintLimit, uint256 newBurnLimit);
|
||||
event MinimumCollateralRatioUpdated(uint256 newRatio);
|
||||
|
||||
/**
|
||||
* @dev Constructor sets up the token with initial parameters
|
||||
* @param name Token name (e.g., "Meridian GBP")
|
||||
* @param symbol Token symbol (e.g., "MGBP")
|
||||
* @param _currency Currency denomination (e.g., "GBP")
|
||||
* @param _issuerName Name of issuing entity
|
||||
* @param _reserveAggregator Address of reserve aggregator contract
|
||||
* @param _compliance Address of compliance contract
|
||||
* @param _admin Address to receive admin role
|
||||
*/
|
||||
constructor(
|
||||
string memory name,
|
||||
string memory symbol,
|
||||
string memory _currency,
|
||||
string memory _issuerName,
|
||||
address _reserveAggregator,
|
||||
address _compliance,
|
||||
address _admin
|
||||
) ERC20(name, symbol) ERC20Permit(name) {
|
||||
require(_reserveAggregator != address(0), "Invalid reserve aggregator");
|
||||
require(_compliance != address(0), "Invalid compliance contract");
|
||||
require(_admin != address(0), "Invalid admin address");
|
||||
|
||||
currency = _currency;
|
||||
issuerName = _issuerName;
|
||||
reserveAggregator = IReserveAggregator(_reserveAggregator);
|
||||
compliance = ICompliance(_compliance);
|
||||
minimumCollateralRatio = 10200; // 102% default
|
||||
|
||||
dailyMintLimit = 10000000 * 10**decimals(); // 10M default
|
||||
dailyBurnLimit = 10000000 * 10**decimals(); // 10M default
|
||||
|
||||
_grantRole(DEFAULT_ADMIN_ROLE, _admin);
|
||||
_grantRole(MINTER_ROLE, _admin);
|
||||
_grantRole(BURNER_ROLE, _admin);
|
||||
_grantRole(COMPLIANCE_ROLE, _admin);
|
||||
_grantRole(PAUSER_ROLE, _admin);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Mint tokens with reserve attestation and compliance checks
|
||||
* @param to Address to mint tokens to
|
||||
* @param amount Amount to mint
|
||||
* @param attestationHash Hash of reserve attestation document
|
||||
*/
|
||||
function mint(
|
||||
address to,
|
||||
uint256 amount,
|
||||
bytes32 attestationHash
|
||||
) external onlyRole(MINTER_ROLE) nonReentrant whenNotPaused {
|
||||
require(to != address(0), "Cannot mint to zero address");
|
||||
require(amount > 0, "Amount must be positive");
|
||||
|
||||
// Check daily mint limit
|
||||
uint256 today = block.timestamp / 86400; // days since epoch
|
||||
require(dailyMinted[today] + amount <= dailyMintLimit, "Daily mint limit exceeded");
|
||||
|
||||
// Check compliance
|
||||
require(compliance.isWhitelisted(to), "Recipient not whitelisted");
|
||||
require(!compliance.isSanctioned(to), "Recipient is sanctioned");
|
||||
|
||||
// Check reserve collateralization after mint
|
||||
uint256 newTotalSupply = totalSupply() + amount;
|
||||
(uint256 reserveValue, bool isValid) = reserveAggregator.getTotalReserveValue();
|
||||
require(isValid, "Reserve data is stale");
|
||||
|
||||
uint256 requiredReserves = (newTotalSupply * minimumCollateralRatio) / 10000;
|
||||
require(reserveValue >= requiredReserves, "Insufficient reserves for mint");
|
||||
|
||||
// Update daily tracking
|
||||
dailyMinted[today] += amount;
|
||||
|
||||
// Mint tokens
|
||||
_mint(to, amount);
|
||||
|
||||
emit Minted(to, amount, attestationHash);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Burn tokens with attestation
|
||||
* @param from Address to burn tokens from
|
||||
* @param amount Amount to burn
|
||||
* @param attestationHash Hash of burn attestation document
|
||||
*/
|
||||
function burn(
|
||||
address from,
|
||||
uint256 amount,
|
||||
bytes32 attestationHash
|
||||
) external onlyRole(BURNER_ROLE) nonReentrant whenNotPaused {
|
||||
require(from != address(0), "Cannot burn from zero address");
|
||||
require(amount > 0, "Amount must be positive");
|
||||
require(balanceOf(from) >= amount, "Insufficient balance");
|
||||
|
||||
// Check daily burn limit
|
||||
uint256 today = block.timestamp / 86400;
|
||||
require(dailyBurned[today] + amount <= dailyBurnLimit, "Daily burn limit exceeded");
|
||||
|
||||
// Update daily tracking
|
||||
dailyBurned[today] += amount;
|
||||
|
||||
// Burn tokens
|
||||
_burn(from, amount);
|
||||
|
||||
emit Burned(from, amount, attestationHash);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Override transfer to include compliance checks
|
||||
*/
|
||||
function _beforeTokenTransfer(
|
||||
address from,
|
||||
address to,
|
||||
uint256 amount
|
||||
) internal virtual override {
|
||||
super._beforeTokenTransfer(from, to, amount);
|
||||
|
||||
// Skip compliance for minting/burning (handled in mint/burn functions)
|
||||
if (from == address(0) || to == address(0)) {
|
||||
return;
|
||||
}
|
||||
|
||||
// Check compliance for regular transfers
|
||||
require(!paused(), "Token transfers paused");
|
||||
require(compliance.isWhitelisted(to), "Recipient not whitelisted");
|
||||
require(!compliance.isSanctioned(from), "Sender is sanctioned");
|
||||
require(!compliance.isSanctioned(to), "Recipient is sanctioned");
|
||||
|
||||
// Check velocity limits
|
||||
require(compliance.checkVelocityLimits(from, amount), "Velocity limit exceeded");
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Get current collateralization ratio
|
||||
* @return ratio Current ratio in basis points * 100 (e.g., 10200 = 102%)
|
||||
* @return isValid Whether the reserve data is current and valid
|
||||
*/
|
||||
function getCurrentCollateralizationRatio() external view returns (uint256 ratio, bool isValid) {
|
||||
(uint256 reserveValue, bool _isValid) = reserveAggregator.getTotalReserveValue();
|
||||
if (!_isValid || totalSupply() == 0) {
|
||||
return (0, false);
|
||||
}
|
||||
ratio = (reserveValue * 10000) / totalSupply();
|
||||
return (ratio, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Update reserve aggregator contract
|
||||
*/
|
||||
function updateReserveAggregator(address newAggregator) external onlyRole(DEFAULT_ADMIN_ROLE) {
|
||||
require(newAggregator != address(0), "Invalid aggregator address");
|
||||
reserveAggregator = IReserveAggregator(newAggregator);
|
||||
emit ReserveAggregatorUpdated(newAggregator);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Update compliance contract
|
||||
*/
|
||||
function updateCompliance(address newCompliance) external onlyRole(DEFAULT_ADMIN_ROLE) {
|
||||
require(newCompliance != address(0), "Invalid compliance address");
|
||||
compliance = ICompliance(newCompliance);
|
||||
emit ComplianceUpdated(newCompliance);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Update daily mint/burn limits
|
||||
*/
|
||||
function updateDailyLimits(
|
||||
uint256 newMintLimit,
|
||||
uint256 newBurnLimit
|
||||
) external onlyRole(DEFAULT_ADMIN_ROLE) {
|
||||
dailyMintLimit = newMintLimit;
|
||||
dailyBurnLimit = newBurnLimit;
|
||||
emit DailyLimitsUpdated(newMintLimit, newBurnLimit);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Update minimum collateral ratio
|
||||
*/
|
||||
function updateMinimumCollateralRatio(uint256 newRatio) external onlyRole(DEFAULT_ADMIN_ROLE) {
|
||||
require(newRatio >= 10000, "Ratio must be at least 100%");
|
||||
minimumCollateralRatio = newRatio;
|
||||
emit MinimumCollateralRatioUpdated(newRatio);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Pause token operations
|
||||
*/
|
||||
function pause() external onlyRole(PAUSER_ROLE) {
|
||||
_pause();
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Unpause token operations
|
||||
*/
|
||||
function unpause() external onlyRole(PAUSER_ROLE) {
|
||||
_unpause();
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Get remaining mint capacity for today
|
||||
*/
|
||||
function getRemainingMintCapacity() external view returns (uint256) {
|
||||
uint256 today = block.timestamp / 86400;
|
||||
return dailyMintLimit - dailyMinted[today];
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Get remaining burn capacity for today
|
||||
*/
|
||||
function getRemainingBurnCapacity() external view returns (uint256) {
|
||||
uint256 today = block.timestamp / 86400;
|
||||
return dailyBurnLimit - dailyBurned[today];
|
||||
}
|
||||
}
|
||||
88
contracts/interfaces/ICompliance.sol
Normal file
88
contracts/interfaces/ICompliance.sol
Normal file
@@ -0,0 +1,88 @@
|
||||
// SPDX-License-Identifier: MIT
|
||||
pragma solidity ^0.8.20;
|
||||
|
||||
/**
|
||||
* @title ICompliance
|
||||
* @dev Interface for KYC, sanctions screening, and AML compliance
|
||||
*/
|
||||
interface ICompliance {
|
||||
struct KYCRecord {
|
||||
bool isWhitelisted;
|
||||
uint256 kycLevel; // 1=basic, 2=enhanced, 3=institutional
|
||||
uint256 whitelistTime;
|
||||
uint256 expiryTime;
|
||||
string jurisdiction;
|
||||
}
|
||||
|
||||
struct VelocityLimits {
|
||||
uint256 dailyLimit;
|
||||
uint256 monthlyLimit;
|
||||
uint256 dailySpent;
|
||||
uint256 monthlySpent;
|
||||
uint256 lastDayReset;
|
||||
uint256 lastMonthReset;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Check if address is whitelisted for KYC
|
||||
* @param account Address to check
|
||||
* @return isWhitelisted True if account passed KYC
|
||||
*/
|
||||
function isWhitelisted(address account) external view returns (bool);
|
||||
|
||||
/**
|
||||
* @dev Check if address is on sanctions list
|
||||
* @param account Address to check
|
||||
* @return isSanctioned True if account is sanctioned
|
||||
*/
|
||||
function isSanctioned(address account) external view returns (bool);
|
||||
|
||||
/**
|
||||
* @dev Check velocity limits for transaction
|
||||
* @param account Address making transaction
|
||||
* @param amount Transaction amount
|
||||
* @return withinLimits True if transaction is within velocity limits
|
||||
*/
|
||||
function checkVelocityLimits(address account, uint256 amount) external view returns (bool withinLimits);
|
||||
|
||||
/**
|
||||
* @dev Get KYC record for address
|
||||
* @param account Address to query
|
||||
*/
|
||||
function getKYCRecord(address account) external view returns (KYCRecord memory);
|
||||
|
||||
/**
|
||||
* @dev Get velocity limits for address
|
||||
* @param account Address to query
|
||||
*/
|
||||
function getVelocityLimits(address account) external view returns (VelocityLimits memory);
|
||||
|
||||
/**
|
||||
* @dev Update velocity tracking after transaction
|
||||
* @param account Address that made transaction
|
||||
* @param amount Transaction amount
|
||||
*/
|
||||
function updateVelocityTracking(address account, uint256 amount) external;
|
||||
|
||||
/**
|
||||
* @dev Check if transaction should trigger AML reporting
|
||||
* @param from Sender address
|
||||
* @param to Recipient address
|
||||
* @param amount Transaction amount
|
||||
* @return shouldReport True if transaction exceeds reporting thresholds
|
||||
* @return reportType Type of report needed (1=CTR, 2=SAR, etc.)
|
||||
*/
|
||||
function checkReportingThresholds(
|
||||
address from,
|
||||
address to,
|
||||
uint256 amount
|
||||
) external view returns (bool shouldReport, uint8 reportType);
|
||||
|
||||
// Events
|
||||
event AccountWhitelisted(address indexed account, uint256 kycLevel, string jurisdiction);
|
||||
event AccountBlacklisted(address indexed account, string reason);
|
||||
event SanctionsListUpdated(uint256 newListHash);
|
||||
event VelocityLimitsUpdated(address indexed account, uint256 dailyLimit, uint256 monthlyLimit);
|
||||
event ReportingThresholdTriggered(address indexed from, address indexed to, uint256 amount, uint8 reportType);
|
||||
event VelocityLimitExceeded(address indexed account, uint256 attempted, uint256 remaining);
|
||||
}
|
||||
66
contracts/interfaces/IReserveAggregator.sol
Normal file
66
contracts/interfaces/IReserveAggregator.sol
Normal file
@@ -0,0 +1,66 @@
|
||||
// SPDX-License-Identifier: MIT
|
||||
pragma solidity ^0.8.20;
|
||||
|
||||
/**
|
||||
* @title IReserveAggregator
|
||||
* @dev Interface for reserve aggregation from multiple custodians
|
||||
*/
|
||||
interface IReserveAggregator {
|
||||
struct CustodianInfo {
|
||||
string name;
|
||||
address oracle;
|
||||
uint256 lastUpdateTime;
|
||||
uint256 heartbeat; // maximum staleness in seconds
|
||||
bool isActive;
|
||||
uint8 custodianType; // 0=bank, 1=crypto, 2=fund_admin
|
||||
}
|
||||
|
||||
struct ReserveAttestation {
|
||||
uint256 balance;
|
||||
uint256 timestamp;
|
||||
bytes32 documentHash;
|
||||
address attestor;
|
||||
bool isValid;
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Get total reserve value across all active custodians
|
||||
* @return totalValue Total reserve value in token denomination
|
||||
* @return isValid Whether all required custodian data is current
|
||||
*/
|
||||
function getTotalReserveValue() external view returns (uint256 totalValue, bool isValid);
|
||||
|
||||
/**
|
||||
* @dev Get reserve value from specific custodian
|
||||
* @param custodianId Unique identifier for custodian
|
||||
* @return value Reserve value from this custodian
|
||||
* @return isValid Whether this custodian's data is current
|
||||
*/
|
||||
function getCustodianReserveValue(bytes32 custodianId) external view returns (uint256 value, bool isValid);
|
||||
|
||||
/**
|
||||
* @dev Get custodian information
|
||||
* @param custodianId Unique identifier for custodian
|
||||
*/
|
||||
function getCustodianInfo(bytes32 custodianId) external view returns (CustodianInfo memory);
|
||||
|
||||
/**
|
||||
* @dev Get latest attestation for a custodian
|
||||
* @param custodianId Unique identifier for custodian
|
||||
*/
|
||||
function getLatestAttestation(bytes32 custodianId) external view returns (ReserveAttestation memory);
|
||||
|
||||
/**
|
||||
* @dev Check if reserve data is stale for any custodian
|
||||
* @return isStale True if any custodian data exceeds heartbeat
|
||||
* @return staleCustodians Array of custodian IDs with stale data
|
||||
*/
|
||||
function checkDataStaleness() external view returns (bool isStale, bytes32[] memory staleCustodians);
|
||||
|
||||
// Events
|
||||
event CustodianAdded(bytes32 indexed custodianId, string name, address oracle);
|
||||
event CustodianUpdated(bytes32 indexed custodianId, address newOracle, uint256 newHeartbeat);
|
||||
event CustodianDeactivated(bytes32 indexed custodianId);
|
||||
event ReserveAttested(bytes32 indexed custodianId, uint256 balance, bytes32 documentHash);
|
||||
event StaleDataDetected(bytes32 indexed custodianId, uint256 lastUpdate, uint256 heartbeat);
|
||||
}
|
||||
Reference in New Issue
Block a user