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

import "../interfaces/IAssetTypeHandler.sol";
import "../../vault/libraries/GRUConstants.sol";

/**
 * @title GRUHandler
 * @notice Handler for Global Reserve Unit (GRU) tokens with layer validation
 */
contract GRUHandler is IAssetTypeHandler {
    using GRUConstants for *;

    function validateAsset(address token) external view override returns (bool) {
        if (token.code.length == 0) return false;
        
        // Additional GRU-specific validation could be added here
        // For now, basic contract existence check
        return true;
    }

    function getRequiredCompliance() external pure override returns (UniversalAssetRegistry.ComplianceLevel) {
        return UniversalAssetRegistry.ComplianceLevel.Institutional;
    }

    function getDefaultLimits() external pure override returns (uint256 min, uint256 max) {
        return (1e18, 10000000e18); // 1 to 10M GRU
    }

    function preTransferHook(address, address, uint256) external pure override {
        // GRU layer validation happens in the token contract itself
    }

    function postTransferHook(address, address, uint256) external pure override {
        // Post-transfer hooks for GRU if needed
    }
}
