BridgeLock

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
"
    },
    "contracts/BridgeLock.sol": {
      "content": "// contracts/BridgeLock.sol\r
// SPDX-License-Identifier: MIT\r
pragma solidity ^0.8.23;\r
\r
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";\r
\r
contract BridgeLock {\r
    IERC20  public immutable sng;       // SNG en Ethereum\r
    uint256 public immutable srcChainId; // 1 (ETH mainnet)\r
    uint256 public nonce;\r
    address public owner;\r
\r
    event Locked(\r
        address indexed user,\r
        uint256 amount,\r
        uint256 nonce,\r
        uint256 srcChainId,\r
        uint256 dstChainId,\r
        bytes32 memo\r
    );\r
\r
    modifier onlyOwner() { require(msg.sender == owner, "not owner"); _; }\r
\r
    constructor(address _sng, uint256 _srcChainId) {\r
        require(_sng != address(0), "zero");\r
        sng = IERC20(_sng);\r
        srcChainId = _srcChainId;\r
        owner = msg.sender;\r
    }\r
\r
    // El usuario debe hacer approve(sng, amount) antes\r
    function lock(uint256 amount, uint256 dstChainId, bytes32 memo) external {\r
        require(amount > 0, "amount=0");\r
        sng.transferFrom(msg.sender, address(this), amount);\r
        uint256 n = ++nonce;\r
        emit Locked(msg.sender, amount, n, srcChainId, dstChainId, memo);\r
    }\r
\r
    // Solo por contingencia (fondos de prueba, etc.)\r
    function rescue(address token, address to, uint256 amount) external onlyOwner {\r
        IERC20(token).transfer(to, amount);\r
    }\r
}\r
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}