smom-dbis-138/contracts/emoney/TokenFactory138.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
import "./interfaces/ITokenFactory138.sol";
import "./interfaces/IeMoneyToken.sol";
import "./interfaces/IPolicyManager.sol";
import "./eMoneyToken.sol";
import "./errors/FactoryErrors.sol";
import "./errors/RegistryErrors.sol";

/**
 * @title TokenFactory138
 * @notice Factory for deploying new eMoneyToken instances as UUPS upgradeable proxies
 * @dev Deploys ERC1967Proxy instances pointing to a shared implementation contract.
 * Each token is configured with its issuer, lien mode, bridge settings, and registered by code hash.
 */
contract TokenFactory138 is ITokenFactory138, AccessControl {
    bytes32 public constant TOKEN_DEPLOYER_ROLE = keccak256("TOKEN_DEPLOYER_ROLE");

    address public immutable implementation;
    address public immutable policyManager;
    address public immutable debtRegistry;
    address public immutable complianceRegistry;

    mapping(bytes32 => address) private _tokensByCodeHash;

    /**
     * @notice Initializes the factory with registry and implementation addresses
     * @param admin Address that will receive DEFAULT_ADMIN_ROLE
     * @param implementation_ Address of the eMoneyToken implementation contract (used for all proxies)
     * @param policyManager_ Address of PolicyManager contract
     * @param debtRegistry_ Address of DebtRegistry contract
     * @param complianceRegistry_ Address of ComplianceRegistry contract
     */
    constructor(
        address admin,
        address implementation_,
        address policyManager_,
        address debtRegistry_,
        address complianceRegistry_
    ) {
        _grantRole(DEFAULT_ADMIN_ROLE, admin);
        implementation = implementation_;
        policyManager = policyManager_;
        debtRegistry = debtRegistry_;
        complianceRegistry = complianceRegistry_;
    }

    /**
     * @notice Deploys a new eMoneyToken instance as a UUPS proxy
     * @dev Requires TOKEN_DEPLOYER_ROLE. Creates ERC1967Proxy, initializes token, and configures PolicyManager.
     * @param name Token name (e.g., "USD eMoney")
     * @param symbol Token symbol (e.g., "USDe")
     * @param config Token configuration (decimals, issuer, lien mode, bridge settings)
     * @return token Address of the deployed proxy token contract
     */
    function deployToken(
        string calldata name,
        string calldata symbol,
        TokenConfig calldata config
    ) external override onlyRole(TOKEN_DEPLOYER_ROLE) returns (address token) {
        if (config.issuer == address(0)) revert ZeroIssuer();
        if (config.defaultLienMode != 1 && config.defaultLienMode != 2) {
            revert PolicyInvalidLienMode(config.defaultLienMode);
        }

        // Deploy UUPS proxy
        bytes memory initData = abi.encodeWithSelector(
            IeMoneyToken.initialize.selector,
            name,
            symbol,
            config.decimals,
            config.issuer,
            policyManager,
            debtRegistry,
            complianceRegistry
        );

        ERC1967Proxy proxy = new ERC1967Proxy(implementation, initData);
        token = address(proxy);

        // Configure token in PolicyManager
        IPolicyManager(policyManager).setLienMode(token, config.defaultLienMode);
        IPolicyManager(policyManager).setBridgeOnly(token, config.bridgeOnly);
        if (config.bridge != address(0)) {
            IPolicyManager(policyManager).setBridge(token, config.bridge);
        }

        // Register token by code hash (deterministic based on deployment params)
        // Include token address, timestamp, and block number to prevent collisions
        bytes32 codeHash = keccak256(abi.encodePacked(name, symbol, config.issuer, token, block.timestamp, block.number));
        _tokensByCodeHash[codeHash] = token;

        emit TokenDeployed(
            token,
            codeHash,
            name,
            symbol,
            config.decimals,
            config.issuer,
            config.defaultLienMode,
            config.bridgeOnly,
            config.bridge
        );
    }

    /**
     * @notice Returns the token address for a given code hash
     * @dev Code hash is generated deterministically during token deployment
     * @param codeHash The code hash to lookup
     * @return Token address (zero address if not found)
     */
    function tokenByCodeHash(bytes32 codeHash) external view override returns (address) {
        return _tokensByCodeHash[codeHash];
    }
}