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

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

/**
 * @title ShariaCompliance
 * @notice Registry and validation system for Sharia-compliant tokens
 * @dev Manages which tokens are approved for Islamic finance compliance
 */
contract ShariaCompliance is Ownable {
    // ============================================================================
    // STRUCTS
    // ============================================================================

    struct ShariaCoin {
        string id;              
        string name;
        string symbol;
        address tokenAddress;  
        bool verified;
        string complianceReason;
        bool exists;
    }

    // ============================================================================
    // STATE VARIABLES
    // ============================================================================

    /// @notice Mapping from coin ID (address) to Sharia coin data
    mapping(string => ShariaCoin) public shariaCoins;
    
    /// @notice Array of all registered coin IDs for enumeration
    string[] public coinIds;
    
    /// @notice Mapping to track coin ID existence in array
    mapping(string => bool) private coinIdExists;

    // Add reverse lookup mappings
    mapping(address => string) public addressToSymbol;  // Address → Symbol
    mapping(string => address) public symbolToAddress;  // Symbol → Address

    // ============================================================================
    // EVENTS
    // ============================================================================

    event CoinRegistered(
        string indexed coinId,
        string name,
        string symbol,
        string complianceReason
    );

    event CoinRemoved(string indexed coinId);

    event CoinUpdated(
        string indexed coinId,
        bool verified,
        string complianceReason
    );

    // ============================================================================
    // ERRORS
    // ============================================================================

    error CoinNotFound(string coinId);
    error CoinAlreadyExists(string coinId);
    error NotShariaCompliant(string coinId);

    // ============================================================================
    // CONSTRUCTOR
    // ============================================================================

    constructor() Ownable(msg.sender) {
        // Initialize with some default Sharia-compliant coins
        _initializeDefaultCoins();
    }

    // ============================================================================
    // ADMIN FUNCTIONS
    // ============================================================================

    /**
     * @notice Register a new Sharia-compliant coin
     * @param coinId Unique identifier (typically token address)
     * @param name Token name
     * @param symbol Token symbol
     * @param complianceReason Explanation of Sharia compliance
     */
    function registerShariaCoin(
        string memory coinId,
        string memory name,
        string memory symbol,
        address tokenAddress, 
        string memory complianceReason
    ) external onlyOwner {
        if (shariaCoins[coinId].exists) {
            revert CoinAlreadyExists(coinId);
        }
        
        if (tokenAddress != address(0)) {
            // Prevent duplicate addresses
            string memory existingSymbol = addressToSymbol[tokenAddress];
            if (bytes(existingSymbol).length > 0) {
                revert("Address already registered");
            }
            // Prevent duplicate symbols
            address existingAddress = symbolToAddress[symbol];
            if (existingAddress != address(0)) {
                revert("Symbol already registered");
            }
            addressToSymbol[tokenAddress] = symbol;
            symbolToAddress[symbol] = tokenAddress;
        }

        shariaCoins[coinId] = ShariaCoin({
            id: coinId,
            name: name,
            symbol: symbol,
            tokenAddress: tokenAddress,  
            verified: true,
            complianceReason: complianceReason,
            exists: true
        });

        if (!coinIdExists[coinId]) {
            coinIds.push(coinId);
            coinIdExists[coinId] = true;
        }

        emit CoinRegistered(coinId, name, symbol, complianceReason);
    }

    /**
     * @notice Remove a coin from the Sharia compliance registry
     * @param coinId Coin identifier to remove
     */
    function removeShariaCoin(string memory coinId) external onlyOwner {
        if (!shariaCoins[coinId].exists) {
            revert CoinNotFound(coinId);
        }

        // Clean up reverse mappings
        address tokenAddress = shariaCoins[coinId].tokenAddress;
        if (tokenAddress != address(0)) {
            delete addressToSymbol[tokenAddress];
            delete symbolToAddress[coinId]; // coinId is the symbol
        }

        delete shariaCoins[coinId];
        
        // Remove from coinIds array
        for (uint256 i = 0; i < coinIds.length; i++) {
            if (keccak256(bytes(coinIds[i])) == keccak256(bytes(coinId))) {
                coinIds[i] = coinIds[coinIds.length - 1];
                coinIds.pop();
                break;
            }
        }
        
        coinIdExists[coinId] = false;

        emit CoinRemoved(coinId);
    }

    /**
     * @notice Update compliance status of a coin
     * @param coinId Coin identifier
     * @param verified New verification status
     * @param complianceReason Updated reason
     */
    function updateComplianceStatus(
        string memory coinId,
        bool verified,
        string memory complianceReason
    ) external onlyOwner {
        if (!shariaCoins[coinId].exists) {
            revert CoinNotFound(coinId);
        }

        shariaCoins[coinId].verified = verified;
        shariaCoins[coinId].complianceReason = complianceReason;

        emit CoinUpdated(coinId, verified, complianceReason);
    }

    // ============================================================================
    // VIEW FUNCTIONS
    // ============================================================================

    /**
     * @notice Check if a coin is Sharia compliant
     * @param coinId Coin identifier to check
     * @return bool True if compliant and verified
     */
    function isShariaCompliant(string memory coinId) public view returns (bool) {
        return shariaCoins[coinId].exists && shariaCoins[coinId].verified;
    }

    /**
     * @notice Get details of a Sharia coin
     * @param coinId Coin identifier
     * @return ShariaCoin struct with all details
     */
    function getShariaCoin(string memory coinId) external view returns (ShariaCoin memory) {
        if (!shariaCoins[coinId].exists) {
            revert CoinNotFound(coinId);
        }
        return shariaCoins[coinId];
    }

    /**
     * @notice Get all registered Sharia coins
     * @return Array of all ShariaCoin structs
     */
    function getAllShariaCoins() external view returns (ShariaCoin[] memory) {
        ShariaCoin[] memory coins = new ShariaCoin[](coinIds.length);
        
        for (uint256 i = 0; i < coinIds.length; i++) {
            coins[i] = shariaCoins[coinIds[i]];
        }
        
        return coins;
    }

    /**
     * @notice Get total number of registered coins
     * @return uint256 Total count
     */
    function getTotalCoins() external view returns (uint256) {
        return coinIds.length;
    }

    /**
     * @notice Require that a coin is Sharia compliant (reverts if not)
     * @param coinId Coin identifier to validate
     */
    function requireShariaCompliant(string memory coinId) public view {
        if (!isShariaCompliant(coinId)) {
            revert NotShariaCompliant(coinId);
        }
    }

    // Add helper functions
    function getCoinByAddress(address tokenAddress) external view returns (ShariaCoin memory) {
        string memory symbol = addressToSymbol[tokenAddress];
        if (bytes(symbol).length == 0) {
            revert CoinNotFound("");
        }
        return shariaCoins[symbol];
    }

    function getCoinBySymbol(string memory symbol) external view returns (ShariaCoin memory) {
        if (!shariaCoins[symbol].exists) {
            revert CoinNotFound(symbol);
        }
        return shariaCoins[symbol];
    }

    function getTokenAddress(string memory symbol) external view returns (address) {
        return symbolToAddress[symbol];
    }

    function getSymbolByAddress(address tokenAddress) external view returns (string memory) {
        return addressToSymbol[tokenAddress];
    }

    // ============================================================================
    // INTERNAL FUNCTIONS
    // ============================================================================

    /**
     * @notice Initialize default Sharia-compliant coins
     * @dev Coins are registered programmatically from config during deployment
     * This function is kept empty - all coins are registered via registerShariaCoin() in deployment script
     */
    function _initializeDefaultCoins() private {
        // All Initial Hala Coins are registered programmatically from config
        // See scripts/deploy/deploy-core.ts for registration logic
    }

    /**
     * @notice Internal function to register a coin during initialization
     * @dev This function is deprecated - use registerShariaCoin() instead
     * Kept for potential future use with default initialization
     */
    function _registerCoin(
        string memory coinId,
        string memory name,
        string memory symbol,
        address tokenAddress,
        string memory complianceReason
    ) private {
        if (tokenAddress != address(0)) {
            string memory existingSymbol = addressToSymbol[tokenAddress];
            if (bytes(existingSymbol).length > 0) {
                return; // Skip if address already registered
            }
            address existingAddress = symbolToAddress[symbol];
            if (existingAddress != address(0)) {
                return; // Skip if symbol already registered
            }
            addressToSymbol[tokenAddress] = symbol;
            symbolToAddress[symbol] = tokenAddress;
        }

        shariaCoins[coinId] = ShariaCoin({
            id: coinId,
            name: name,
            symbol: symbol,
            tokenAddress: tokenAddress,
            verified: true,
            complianceReason: complianceReason,
            exists: true
        });

        if (!coinIdExists[coinId]) {
            coinIds.push(coinId);
            coinIdExists[coinId] = true;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "viaIR": true,
  "evmVersion": "london",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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ShariaCompliance.ShariaCoin","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"coinId","type":"string"}],"name":"getShariaCoin","outputs":[{"components":[{"internalType":"string","name":"id","type":"string"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"bool","name":"verified","type":"bool"},{"internalType":"string","name":"complianceReason","type":"string"},{"internalType":"bool","name":"exists","type":"bool"}],"internalType":"struct ShariaCompliance.ShariaCoin","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"}],"name":"getSymbolByAddress","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"symbol","type":"string"}],"name":"getTokenAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTotalCoins","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"coinId","type":"string"}],"name":"isShariaCompliant","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"coinId","type":"string"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"string","name":"complianceReason","type":"string"}],"name":"registerShariaCoin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"coinId","type":"string"}],"name":"removeShariaCoin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"coinId","type":"string"}],"name":"requireShariaCompliant","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"shariaCoins","outputs":[{"internalType":"string","name":"id","type":"string"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"bool","name":"verified","type":"bool"},{"internalType":"string","name":"complianceReason","type":"string"},{"internalType":"bool","name":"exists","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"symbolToAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"coinId","type":"string"},{"internalType":"bool","name":"verified","type":"bool"},{"internalType":"string","name":"complianceReason","type":"string"}],"name":"updateComplianceStatus","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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