ETH Price: $3,308.31 (-0.05%)

Contract

0xb40EEd68d7d6B3b6d6f4E93DE6239B7C53EFc786
 

Multichain Info

Transaction Hash
Method
Block
From
To
Claim215913992025-01-10 3:29:236 hrs ago1736479763IN
0xb40EEd68...C53EFc786
0 ETH0.000377575.69858475
Transfer215893532025-01-09 20:37:2313 hrs ago1736455043IN
0xb40EEd68...C53EFc786
0.012 ETH0.0003490115.57896057
Claim215870402025-01-09 12:52:1121 hrs ago1736427131IN
0xb40EEd68...C53EFc786
0 ETH0.000354065.33918989
Transfer215863722025-01-09 10:37:2323 hrs ago1736419043IN
0xb40EEd68...C53EFc786
0.061 ETH0.000154296.88713194
Transfer215819522025-01-08 19:48:4738 hrs ago1736365727IN
0xb40EEd68...C53EFc786
0.055 ETH0.000210379.39042373
Transfer215815742025-01-08 18:32:5939 hrs ago1736361179IN
0xb40EEd68...C53EFc786
0.07 ETH0.000504522.51969061
Transfer215813002025-01-08 17:38:1140 hrs ago1736357891IN
0xb40EEd68...C53EFc786
0.002 ETH0.0009102340.63017251
Transfer215812802025-01-08 17:34:1140 hrs ago1736357651IN
0xb40EEd68...C53EFc786
0.3 ETH0.0011145849.75181503
Claim215811752025-01-08 17:13:1140 hrs ago1736356391IN
0xb40EEd68...C53EFc786
0 ETH0.0016309424.5943444
Transfer215810972025-01-08 16:57:3541 hrs ago1736355455IN
0xb40EEd68...C53EFc786
0.33 ETH0.0003579815.97951634
Transfer215810432025-01-08 16:46:4741 hrs ago1736354807IN
0xb40EEd68...C53EFc786
0.015 ETH0.0002916313.01752722
Claim215809552025-01-08 16:28:5941 hrs ago1736353739IN
0xb40EEd68...C53EFc786
0 ETH0.0007716711.63875953
Transfer215776082025-01-08 5:17:232 days ago1736313443IN
0xb40EEd68...C53EFc786
0.0047 ETH0.000101884.54777126
Claim215771242025-01-08 3:39:352 days ago1736307575IN
0xb40EEd68...C53EFc786
0 ETH0.000405436.1157719
Transfer215750322025-01-07 20:38:352 days ago1736282315IN
0xb40EEd68...C53EFc786
0.015 ETH0.0002974413.27686493
Transfer215749272025-01-07 20:17:352 days ago1736281055IN
0xb40EEd68...C53EFc786
0.04 ETH0.000539224.06857766
Transfer215747752025-01-07 19:46:592 days ago1736279219IN
0xb40EEd68...C53EFc786
0.8 ETH0.0004121118.39547093
Transfer215741082025-01-07 17:32:592 days ago1736271179IN
0xb40EEd68...C53EFc786
0.009 ETH0.0002999913.3909784
Transfer215740632025-01-07 17:23:592 days ago1736270639IN
0xb40EEd68...C53EFc786
0.02545408 ETH0.0003156914.09144232
Transfer215740362025-01-07 17:18:352 days ago1736270315IN
0xb40EEd68...C53EFc786
0.05 ETH0.00035815.98010733
Transfer215740092025-01-07 17:13:112 days ago1736269991IN
0xb40EEd68...C53EFc786
0.004 ETH0.0003392215.14212095
Transfer215738932025-01-07 16:49:472 days ago1736268587IN
0xb40EEd68...C53EFc786
0.024 ETH0.000338515.10992889
Transfer215737802025-01-07 16:26:592 days ago1736267219IN
0xb40EEd68...C53EFc786
0.004 ETH0.0004898921.86755764
Transfer215737472025-01-07 16:20:112 days ago1736266811IN
0xb40EEd68...C53EFc786
0.05142 ETH0.0005523124.65365159
Transfer215735512025-01-07 15:40:472 days ago1736264447IN
0xb40EEd68...C53EFc786
0.005 ETH0.00073432.76368927
View all transactions

Latest 25 internal transactions (View All)

Advanced mode:
Parent Transaction Hash Block
From
To
215913992025-01-10 3:29:236 hrs ago1736479763
0xb40EEd68...C53EFc786
0.0264 ETH
215870402025-01-09 12:52:1121 hrs ago1736427131
0xb40EEd68...C53EFc786
3.11943759 ETH
215811752025-01-08 17:13:1140 hrs ago1736356391
0xb40EEd68...C53EFc786
0.75660135 ETH
215809552025-01-08 16:28:5941 hrs ago1736353739
0xb40EEd68...C53EFc786
0.2 ETH
215771242025-01-08 3:39:352 days ago1736307575
0xb40EEd68...C53EFc786
0.3918099 ETH
215676042025-01-06 19:47:233 days ago1736192843
0xb40EEd68...C53EFc786
0.045 ETH
215648792025-01-06 10:38:473 days ago1736159927
0xb40EEd68...C53EFc786
1.321 ETH
215627252025-01-06 3:24:474 days ago1736133887
0xb40EEd68...C53EFc786
0.024 ETH
215627202025-01-06 3:23:474 days ago1736133827
0xb40EEd68...C53EFc786
0.119 ETH
215239792024-12-31 17:36:119 days ago1735666571
0xb40EEd68...C53EFc786
0.30253233 ETH
215235762024-12-31 16:14:599 days ago1735661699
0xb40EEd68...C53EFc786
0.03 ETH
215028342024-12-28 18:44:3512 days ago1735411475
0xb40EEd68...C53EFc786
0.04871795 ETH
214971602024-12-27 23:44:4713 days ago1735343087
0xb40EEd68...C53EFc786
0.16151002 ETH
214944442024-12-27 14:38:3513 days ago1735310315
0xb40EEd68...C53EFc786
0.002 ETH
214815922024-12-25 19:31:4715 days ago1735155107
0xb40EEd68...C53EFc786
0.08 ETH
214813782024-12-25 18:48:4715 days ago1735152527
0xb40EEd68...C53EFc786
0.07 ETH
214752532024-12-24 22:16:4716 days ago1735078607
0xb40EEd68...C53EFc786
0.30654797 ETH
214732542024-12-24 15:34:4716 days ago1735054487
0xb40EEd68...C53EFc786
0.0052 ETH
214731852024-12-24 15:20:3516 days ago1735053635
0xb40EEd68...C53EFc786
0.035 ETH
214663962024-12-23 16:32:2317 days ago1734971543
0xb40EEd68...C53EFc786
0.03 ETH
214602492024-12-22 19:53:3518 days ago1734897215
0xb40EEd68...C53EFc786
0.50079937 ETH
214430572024-12-20 10:12:4720 days ago1734689567
0xb40EEd68...C53EFc786
1.8527617 ETH
214425442024-12-20 8:29:2321 days ago1734683363
0xb40EEd68...C53EFc786
0.3242554 ETH
214392362024-12-19 21:25:1121 days ago1734643511
0xb40EEd68...C53EFc786
0.0125 ETH
214334422024-12-19 1:58:5922 days ago1734573539
0xb40EEd68...C53EFc786
0.28970631 ETH
View All Internal Transactions
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Contract Source Code Verified (Exact Match)

Contract Name:
ApolloxExchangeTreasury

Compiler Version
v0.8.13+commit.abaa5c0e

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 8 : ApolloxExchangeTreasury.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";

pragma experimental ABIEncoderV2;

contract ApolloxExchangeTreasury is Ownable {
    using SafeERC20 for IERC20;

    event ReceiveEther(address sender, uint amount);
    event Claimed(uint256 indexed id, address indexed to, bool isETH, address currency, uint256 amount, uint256 deadline);
    event TransferToCounterParty(bool isETH, address currency, uint256 amount);
    event Paused();
    event Unpaused();
    event NewTruthHolder(address oldTruthHolder, address newTruthHolder);
    event NewOperator(address oldOperator, address newOperator);
    event NewCounterParty(address oldCounterParty, address newCounterParty);
    event AddCurrency(address indexed currency);
    event RemoveCurrency(address indexed currency);

    bool public paused;
    address public truthHolder;
    address public operator;
    address payable public counterParty;
    mapping(address => bool) public supportCurrency;
    mapping(uint => uint) public claimHistory;

    modifier notPaused() {
        require(!paused, "paused");
        _;
    }

    modifier onlyOperator() {
        require(msg.sender == operator, "only operator can call");
        _;
    }

    constructor (address truthHolder_, address operator_, address payable counterParty_) {
        paused = false;
        truthHolder = truthHolder_;
        operator = operator_;
        counterParty = counterParty_;
    }

    // This function is called for plain Ether transfers
    receive() external payable {
        if (msg.value > 0) {
            emit ReceiveEther(msg.sender, msg.value);
        }
    }

    function _transfer(address payable to, bool isETH, address currency, uint amount) internal {
        if(isETH) {
            require(address(this).balance >= amount, "not enough ether balance");
            require(to.send(amount), "ether transfer failed");
        } else {
            IERC20 token = IERC20(currency);
            uint balance = token.balanceOf(address(this));
            require(balance >= amount, "not enough currency balance");
            token.safeTransfer(to, amount);
        }
    }

    function transferToCounterParty(bool isETH, address currency, uint amount) external onlyOperator {
        _transfer(counterParty, isETH, currency, amount);
        emit TransferToCounterParty(isETH, currency, amount);
    }

    function claim(bytes calldata message, bytes calldata signature) external notPaused {
        address signer = source(message, signature);
        require(signer == truthHolder, "only accept truthHolder signed message");

        (uint256 id, address payable to, bool isETH, address currency, uint256 amount, uint256 deadline) = abi.decode(message, (uint256, address, bool, address, uint256, uint256));
        require(claimHistory[id] == 0, "already claimed");
        require(isETH || supportCurrency[currency], "currency not support");
        require(block.timestamp < deadline, "already passed deadline");

        claimHistory[id] = block.number;
        _transfer(to, isETH, currency, amount);
        emit Claimed(id, to, isETH, currency, amount, deadline);
    }

    function source(bytes memory message, bytes memory signature) public pure returns (address) {
        bytes32 hash = keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(message)));
        return ECDSA.recover(hash, signature);
    }

    function _pause() external onlyOwner {
        paused = true;
        emit Paused();
    }

    function _unpause() external onlyOwner {
        paused = false;
        emit Unpaused();
    }

    function _changeTruthHolder(address newTruthHolder) external onlyOwner {
        address oldHolder = truthHolder;
        truthHolder = newTruthHolder;
        emit NewTruthHolder(oldHolder, newTruthHolder);
    }

    function _setOperator(address newOperator) external onlyOwner {
        address oldOperator = operator;
        operator = newOperator;
        emit NewOperator(oldOperator, newOperator);
    }

    function _setCounterParty(address payable newCounterParty) external onlyOwner {
        address payable oldCounterParty = counterParty;
        counterParty = newCounterParty;
        emit NewCounterParty(oldCounterParty, newCounterParty);
    }

    function _addCurrency(address currency) external onlyOwner {
        supportCurrency[currency] = true;
        emit AddCurrency(currency);
    }

    function _removeCurrency(address currency) external onlyOwner {
        delete supportCurrency[currency];
        emit RemoveCurrency(currency);
    }

}

File 2 of 8 : ECDSA.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

File 3 of 8 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

File 4 of 8 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}

File 5 of 8 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 6 of 8 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 7 of 8 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

    /**
     * @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);
}

File 8 of 8 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../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.
 *
 * By default, the owner account will be the one that deploys the contract. 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;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing 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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _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);
    }
}

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"truthHolder_","type":"address"},{"internalType":"address","name":"operator_","type":"address"},{"internalType":"address payable","name":"counterParty_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"currency","type":"address"}],"name":"AddCurrency","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"bool","name":"isETH","type":"bool"},{"indexed":false,"internalType":"address","name":"currency","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"Claimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldCounterParty","type":"address"},{"indexed":false,"internalType":"address","name":"newCounterParty","type":"address"}],"name":"NewCounterParty","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldOperator","type":"address"},{"indexed":false,"internalType":"address","name":"newOperator","type":"address"}],"name":"NewOperator","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldTruthHolder","type":"address"},{"indexed":false,"internalType":"address","name":"newTruthHolder","type":"address"}],"name":"NewTruthHolder","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ReceiveEther","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"currency","type":"address"}],"name":"RemoveCurrency","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"isETH","type":"bool"},{"indexed":false,"internalType":"address","name":"currency","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"TransferToCounterParty","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpaused","type":"event"},{"inputs":[{"internalType":"address","name":"currency","type":"address"}],"name":"_addCurrency","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newTruthHolder","type":"address"}],"name":"_changeTruthHolder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"_pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"currency","type":"address"}],"name":"_removeCurrency","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"newCounterParty","type":"address"}],"name":"_setCounterParty","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOperator","type":"address"}],"name":"_setOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"_unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"message","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"claimHistory","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"counterParty","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"operator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"message","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"source","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"supportCurrency","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"isETH","type":"bool"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferToCounterParty","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"truthHolder","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000a6cb831648e9f813a5040bee28d00f13fc1b474600000000000000000000000076f1dc0652ecc94be75c448358a5b2cf78cc2e6900000000000000000000000076f1dc0652ecc94be75c448358a5b2cf78cc2e69

-----Decoded View---------------
Arg [0] : truthHolder_ (address): 0xA6Cb831648E9f813a5040Bee28D00f13fc1b4746
Arg [1] : operator_ (address): 0x76F1dc0652ecC94BE75c448358A5b2cF78cC2e69
Arg [2] : counterParty_ (address): 0x76F1dc0652ecC94BE75c448358A5b2cF78cC2e69

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000a6cb831648e9f813a5040bee28d00f13fc1b4746
Arg [1] : 00000000000000000000000076f1dc0652ecc94be75c448358a5b2cf78cc2e69
Arg [2] : 00000000000000000000000076f1dc0652ecc94be75c448358a5b2cf78cc2e69


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.