Contract 0x840ea78f667b73853f4baece4a5ebe212c4039c1 1

Bridge 
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x23e60b580b4d4828581b7143f061a06cbc6b5c4a2e1b4755be4f0c5614f97bfeCreate183788472021-08-25 11:08:1495 days 10 hrs ago0x8f2613fb0743928a2d137ca99cb0413a46a11068 IN  Evodefi: Bridge0 MATIC0.0000319671
0xfd73c88b8780c015e0a44017ec4be67a4833f6003837f6225b88ae0612e32076Create172215172021-07-24 14:54:53127 days 6 hrs ago0xeaba7718537a3f8fe91dc56c229810f7c5242c02 IN  Evodefi: Bridge0 MATIC0.000035483484
0xbbdf85def2b2ff91954e680c0654f457663759061c90a09dc2625aa5c3361b65Create172215172021-07-24 14:54:53127 days 6 hrs ago0xeaba7718537a3f8fe91dc56c229810f7c5242c02 IN  Evodefi: Bridge0 MATIC0.000031967103
0x4a4ca545ea82c4a57ab422c75bc568ead7e60961309580f38bc4180b33a2afcaSet Max Amount169259572021-07-16 14:17:32135 days 7 hrs ago0x6b54fbcafa1e4824a6ba004208ffe5fb8acccfe8 IN  Evodefi: Bridge0 MATIC0.000067926
0x8d21571a5bc5f4a0f1f5a3d257a2ea7ac08e5dd3e7a5a3668766a745010a4b96Set Max Amount169259562021-07-16 14:17:30135 days 7 hrs ago0x6b54fbcafa1e4824a6ba004208ffe5fb8acccfe8 IN  Evodefi: Bridge0 MATIC0.00006792
0xda9efecb117856e96ea8bdc4ce8d2c0cdd515554b10665438bbd5f5f07c51f58Set Max Amount169259552021-07-16 14:17:28135 days 7 hrs ago0x6b54fbcafa1e4824a6ba004208ffe5fb8acccfe8 IN  Evodefi: Bridge0 MATIC0.000083196
0x2de34f3663f828e12001cff9cc71cb0e544b189b1ab96fdf587292b02243ad1eSet Max Amount169259532021-07-16 14:17:24135 days 7 hrs ago0x6b54fbcafa1e4824a6ba004208ffe5fb8acccfe8 IN  Evodefi: Bridge0 MATIC0.000061323
0x15ec52f415e970e17c64497b0fc874d909da9d8a695255a06cf9c0f5b5a9f990Withdraw169243602021-07-16 13:16:31135 days 8 hrs ago0x598e630ea3e4c3de045ca0dd5f377565ec2f540c IN  Evodefi: Bridge0 MATIC0.0001884534
0x0108656031093d93a7aacc050c193855b3237e7b9d78e046a7b509101ed1c0b4Withdraw169243492021-07-16 13:15:47135 days 8 hrs ago0x598e630ea3e4c3de045ca0dd5f377565ec2f540c IN  Evodefi: Bridge0 MATIC0.0002033801
0x97c4431f65d5cd4566c01665ba4affd7e5ab811bf0921281fc6cd910265119ceWithdraw169243232021-07-16 13:14:55135 days 8 hrs ago0x598e630ea3e4c3de045ca0dd5f377565ec2f540c IN  Evodefi: Bridge0 MATIC0.000318437
0x88652d42e91a65634b82d27828ebeb3dec99c404f6ca634c26bafd7303bf30feClose169237522021-07-16 12:53:09135 days 8 hrs ago0x835e5c4b6ab3c4554d5458827fae89c1e84040c8 IN  Evodefi: Bridge0 MATIC0.00064128
0x22324de466c28edbeab706fb4682cdd9a8959fbc5f387ae1e8ed97583779014eCreate169237362021-07-16 12:52:37135 days 8 hrs ago0x1404a011893260be8f67fa47a06f60b2fcad11e8 IN  Evodefi: Bridge0 MATIC0.000511946
0x6e10690e2bc807a818cd03765fe679fb291193a9acb811bf0f09fedc164f18bcComplete Order169237242021-07-16 12:52:13135 days 8 hrs ago0x42db5e69201aa5bebe81d89f9cd529f45ad7fb37 IN  Evodefi: Bridge0 MATIC0.006374872
0x2fc05442f616bfbf2697a1eec1633a9c1789f8ab6823f1abeba2824216e5e700Complete Order169236902021-07-16 12:51:01135 days 8 hrs ago0xa967314fff11dfd6f2aeda9dfa6cf2b41cd9c37c IN  Evodefi: Bridge0 MATIC0.003643168
0x49d2901c1364e56f0d21220d81b3d9fcaa1b10028b00ceba4e9024ef5fbc5f75Close169236822021-07-16 12:50:45135 days 8 hrs ago0x42db5e69201aa5bebe81d89f9cd529f45ad7fb37 IN  Evodefi: Bridge0 MATIC0.00064128
0x6ff15b9e621799958c9e920efa32822994e2d95fc36fea258bff55cd3049dc4dCreate169236672021-07-16 12:50:15135 days 8 hrs ago0x53e883570510db3fd97f664d849c99285d7103cb IN  Evodefi: Bridge0 MATIC0.000539474
0x0dca81e4a877fb11199bb63bf338df169004894e60487685aa352a652ff1e294Complete Order169236672021-07-16 12:50:15135 days 8 hrs ago0xa967314fff11dfd6f2aeda9dfa6cf2b41cd9c37c IN  Evodefi: Bridge0 MATIC0.0046428
0xfa2f55092a7149d1b82b2c27e4549e774835da54e84371f283bce9dbfa30bc81Complete Order169236042021-07-16 12:48:02135 days 8 hrs ago0x42db5e69201aa5bebe81d89f9cd529f45ad7fb37 IN  Evodefi: Bridge0 MATIC0.003643168
0x8f65438b338dfffde8494800485defcd000119a0fa927f885e540baae33a567bClose169235652021-07-16 12:46:40135 days 8 hrs ago0x6ea2f80bdf4ad3f0add325ea3b2dc8e60a73ef2e IN  Evodefi: Bridge0 MATIC0.00064128
0x8b605abc20895cdc78a545b4717d7ff0847cdc994c10cf12ee45a9a8d5fe8ff0Create169235502021-07-16 12:46:10135 days 8 hrs ago0xd1e2ae106d36ca7512469f1f09f7dfc88c3d3418 IN  Evodefi: Bridge0 MATIC0.000539474
0x7f1ec4cfa9f8a43dd08d46355888b514140f4361427ef1b6fa088b230fd5a8eaComplete Order169234722021-07-16 12:41:56135 days 8 hrs ago0x6ea2f80bdf4ad3f0add325ea3b2dc8e60a73ef2e IN  Evodefi: Bridge0 MATIC0.003643552
0x843077b23044aab57b333bde574f1ca1d6d3a8ced5403ddfcb9bc632d0153b25Close169234692021-07-16 12:41:44135 days 8 hrs ago0x42db5e69201aa5bebe81d89f9cd529f45ad7fb37 IN  Evodefi: Bridge0 MATIC0.00064128
0x2fc8384f4166676e592d94e589429d290265dd3c198ceecd5ae220fc8022f564Create169234592021-07-16 12:41:04135 days 8 hrs ago0x795cbef711274a963a6984fc2915e9163fee32cd IN  Evodefi: Bridge0 MATIC0.000767883
0xc120ee56b3953587a922ac29594cf026238d2d099627952ac06111355914a9e1Complete Order169234382021-07-16 12:40:10135 days 9 hrs ago0xa967314fff11dfd6f2aeda9dfa6cf2b41cd9c37c IN  Evodefi: Bridge0 MATIC0.0046428
0x280079e3cd7ce570f516a17fc7554455ea13a4fb166a030dd72bfb55691f709aClose169234142021-07-16 12:39:22135 days 9 hrs ago0x85cd32f6914ae922c868a37467957d7be86cc070 IN  Evodefi: Bridge0 MATIC0.00064128
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Latest 25 internal transaction
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0x6e10690e2bc807a818cd03765fe679fb291193a9acb811bf0f09fedc164f18bc169237242021-07-16 12:52:13135 days 8 hrs ago Evodefi: Bridge0x54382c8c87de8641718a9535ce3c3268250e3aec0.001 MATIC
0x2fc05442f616bfbf2697a1eec1633a9c1789f8ab6823f1abeba2824216e5e700169236902021-07-16 12:51:01135 days 8 hrs ago Evodefi: Bridge0x1f8168a6fa99830172b738134616fba08207cf9c0.001 MATIC
0x0dca81e4a877fb11199bb63bf338df169004894e60487685aa352a652ff1e294169236672021-07-16 12:50:15135 days 8 hrs ago Evodefi: Bridge0x78187b10f5c974b665119372a88111d5bb69e2530.001 MATIC
0xfa2f55092a7149d1b82b2c27e4549e774835da54e84371f283bce9dbfa30bc81169236042021-07-16 12:48:02135 days 8 hrs ago Evodefi: Bridge0x2c053da177fc0b87f87d812a643f3205e79e16ea0.001 MATIC
0x7f1ec4cfa9f8a43dd08d46355888b514140f4361427ef1b6fa088b230fd5a8ea169234722021-07-16 12:41:56135 days 8 hrs ago Evodefi: Bridge0x5a4c3009114faa2998891f326d9dd8a1063e37bf0.001 MATIC
0xc120ee56b3953587a922ac29594cf026238d2d099627952ac06111355914a9e1169234382021-07-16 12:40:10135 days 9 hrs ago Evodefi: Bridge0xf06b705d089f748239bdfc4c7c222fc5622c7b460.001 MATIC
0xda944b2b41b9f5cbf1047a6a9d4fbd07d1cb6431e98ab51e353489e403158826169233832021-07-16 12:38:16135 days 9 hrs ago Evodefi: Bridge0x2568fc2641119c1f687f7a65be8efe186efaff010.001 MATIC
0x43530ee613bcbec104877e203c382201bf6ba23e7a8b98a4ac88cd8ecba44772169233702021-07-16 12:37:50135 days 9 hrs ago Evodefi: Bridge0x10f8a7706f36e8f2c88a77f03067b1970dd8d99b0.001 MATIC
0x10b3aa05e2e9a99f70cf6dd25837a3abf2ac61302438db1843c0ab6fec6ea47f169233562021-07-16 12:37:22135 days 9 hrs ago Evodefi: Bridge0x57f31c1782c15cc4b14a065f85f0179f3a3bed1a0.001 MATIC
0x0519e41eae8d5fe53dfdf26d971ab666f81159857494235943c54a2da7ee7b41169233482021-07-16 12:37:06135 days 9 hrs ago Evodefi: Bridge0x74ab5d0ccdb5a8b8be357bf395f121e5bcaeb86f0.001 MATIC
0x36e8923b4216f938e3da61e95def1f1e200bb0953d2adc4674af7390c88ebfa7169232952021-07-16 12:35:16135 days 9 hrs ago Evodefi: Bridge0x64340a6b88232d979ce2ce0f3399db7e5ba751a30.001 MATIC
0xddae7a44947cc1b2901225be52b2ea040d6c46a21f0bafc01e39ce00061ce5e4169232432021-07-16 12:33:28135 days 9 hrs ago Evodefi: Bridge0xa5a0cdf224a776c6d41cc46ba36efebe60fb3f700.001 MATIC
0xb93ce8ab4cc21cc438dae6f822d39dce576f0077296031c83ca7ab216fd5eb0a169232292021-07-16 12:33:00135 days 9 hrs ago Evodefi: Bridge0xfb825828749435a66eb7710c0d743cb32ae022dd0.001 MATIC
0x34f8b1e29e0bbd1142021086e02f7430176bb0aa503eacfe3364da1a52a26c33169231492021-07-16 12:30:16135 days 9 hrs ago Evodefi: Bridge0x2f621c4210957534de8d06582fb520c70f85f42c0.001 MATIC
0xe5d8bf59900198bd8a28458173fa2d6b082720c94cd1f16ba0811a007063402d169231482021-07-16 12:30:14135 days 9 hrs ago Evodefi: Bridge0x6bebbf542b5d45b0bf19229687288964bd7b014c0.001 MATIC
0xa9a64f7d3ac2c4b79d1f0d3895708348df7c9a971ab392603ccd4b068d800368169231132021-07-16 12:29:00135 days 9 hrs ago Evodefi: Bridge0x2f621c4210957534de8d06582fb520c70f85f42c0.001 MATIC
0x75fc33e46a6f9d6a15ff76077c7ea84003c7f7c33f4c3754520d7beccc694623169231132021-07-16 12:29:00135 days 9 hrs ago Evodefi: Bridge0x6d87a792997de0fe469fddba52f9c5724c73b8850.001 MATIC
0xe0995828f778c09e8462d846c119c8f2b377720410bfc791516f20ab3bbd41a7169230862021-07-16 12:28:06135 days 9 hrs ago Evodefi: Bridge0x47396c4b88d8680284d922822a3868bd1342ca3d0.001 MATIC
0xd5438a50403fbac222d37ab92cfda45e7a1b36fb43e955c8424c4c6f6877ca41169230782021-07-16 12:27:37135 days 9 hrs ago Evodefi: Bridge0x2f621c4210957534de8d06582fb520c70f85f42c0.001 MATIC
0xe2ca8d53ddef03e8e98f22163a91d57315aadd777adcda3b265a92f560e773c2169230762021-07-16 12:27:29135 days 9 hrs ago Evodefi: Bridge0x284c82f7c87897010b09618042c5d24473a9e2770.001 MATIC
0xf3b2fabc0e80406efbc1e13513bef1713b1554a93e9fba9bd13505f3ae5f7932169230712021-07-16 12:27:05135 days 9 hrs ago Evodefi: Bridge0x1a544ad05a895ce2ef04a03c285d31fee24454480.001 MATIC
0xc5dc2630d8ebcff99f547d0b82c1f3acb6a5ab5082a33e96c7ebcd53dc5092f6169230132021-07-16 12:25:09135 days 9 hrs ago Evodefi: Bridge0xf8e5078c48c8e4e40196991060cdcb39f2b819240.001 MATIC
0x1272285384db44e699577f86bfe6659b76bbfbd63840d1710943e7acbd70d9ec169229832021-07-16 12:24:05135 days 9 hrs ago Evodefi: Bridge0xf876a7c57054460282f4ee1b5528c9d1700269070.001 MATIC
0xc818c0c03be4568d15bbe7b37e32cf1bfbf47b3ef080e82d5b1a0bce3cd76dc4169229392021-07-16 12:22:33135 days 9 hrs ago Evodefi: Bridge0xeb146edcdf0c4840088b3c8f39c0392a230c99fd0.001 MATIC
0xd0dbaa8bc2f869d80a688551f40d1261b226d7811b793cbae980b51c1c36aaf5169228172021-07-16 12:18:25135 days 9 hrs ago Evodefi: Bridge0x87b556eed9f2e97fba23887fa2e59eeea6239e810.001 MATIC
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Contract Source Code Verified (Exact Match)

Contract Name:
Bridge

Compiler Version
v0.8.0+commit.c7dfd78e

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 10 : Bridge.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";

import "./Trustable.sol";

contract Bridge is Trustable {
    using EnumerableSet for EnumerableSet.UintSet;
    using SafeERC20 for ERC20;

    struct Order {
        uint id;
        uint16 tokenId;
        address sender;
        address target;
        uint amount;
        uint8 decimals;
        uint8 destination;
    }

    struct Token {
        ERC20 token;
        uint16 fee;
        uint feeBase;
        address feeTarget;
        uint minAmount;
        uint maxAmount;
        uint dailyLimit;
        uint bonus;
    }

    struct UserStats {
        uint transfered;
        uint limitFrom;
    }

    event OrderCreated(uint indexed id, Order order, uint fee);
    event OrderCompleted(uint indexed id, uint8 indexed dstFrom);

    uint nextOrderId = 0;
    uint16 tokensLength = 0;

    mapping (uint16 => Token) public tokens;
    mapping (uint16 => mapping (address => UserStats)) public stats;
    mapping (uint => Order) public orders;
    EnumerableSet.UintSet private orderIds;
    mapping (bytes32 => bool) public completed;

    function setToken(
        uint16 tokenId,
        ERC20 token,
        uint16 fee,
        uint feeBase,
        address feeTarget,
        uint minAmount,
        uint maxAmount,
        uint dailyLimit,
        uint8 inputDecimals
    ) external onlyOwner {
        require(fee <= 10000, "invalid fee");
        tokens[tokenId] = Token(
            token,
            fee,
            convertAmount(token, feeBase, inputDecimals),
            feeTarget,
            convertAmount(token, minAmount, inputDecimals),
            convertAmount(token, maxAmount, inputDecimals),
            convertAmount(token, dailyLimit, inputDecimals),
            0
        );
        if (tokenId + 1 > tokensLength) {
            tokensLength = tokenId + 1;
        }
    }

    function convertAmount(ERC20 token, uint amount, uint decimals) view internal returns (uint) {
        return amount * (10 ** token.decimals()) / (10 ** decimals);
    }

    function setFee(uint16 tokenId, uint16 fee) external onlyOwner {
        require(fee <= 10000, "invalid fee");
        tokens[tokenId].fee = fee;
    }

    function setFeeBase(uint16 tokenId, uint feeBase, uint8 inputDecimals) external onlyOwner {
        tokens[tokenId].feeBase = convertAmount(tokens[tokenId].token, feeBase, inputDecimals);
    }

    function setFeeTarget(uint16 tokenId, address feeTarget) external onlyOwner {
        tokens[tokenId].feeTarget = feeTarget;
    }

    function setDailyLimit(uint16 tokenId, uint dailyLimit, uint8 inputDecimals) external onlyOwner {
        tokens[tokenId].dailyLimit = convertAmount(tokens[tokenId].token, dailyLimit, inputDecimals);
    }

    function setMinAmount(uint16 tokenId, uint minAmount, uint8 inputDecimals) external onlyOwner {
        tokens[tokenId].minAmount = convertAmount(tokens[tokenId].token, minAmount, inputDecimals);
    }

    function setMaxAmount(uint16 tokenId, uint maxAmount, uint8 inputDecimals) external onlyOwner {
        tokens[tokenId].maxAmount = convertAmount(tokens[tokenId].token, maxAmount, inputDecimals);
    }

    function setBonus(uint16 tokenId, uint bonus) external onlyOwner {
        tokens[tokenId].bonus = bonus;
    }

    function create(uint16 tokenId, uint amount, uint8 destination, address target) external {
        Token storage tok = tokens[tokenId];
        require(address(tok.token) != address(0), "unknown token");

        require(amount >= tok.minAmount, "amount lower than mininum");
        require(amount <= tok.maxAmount, "amount greater than mininum");

        UserStats storage st = stats[tokenId][msg.sender];

        bool lastIsOld = st.limitFrom + 24 hours < block.timestamp;
        if (lastIsOld) {
            st.limitFrom = block.timestamp;
            st.transfered = 0;
        }
        require(st.transfered + amount <= tok.dailyLimit, "daily limit exceed");
        st.transfered += amount;

        uint feeAmount = tok.feeBase + amount * tok.fee / 10000;
        if (feeAmount > 0) {
            tok.token.safeTransferFrom(msg.sender, tok.feeTarget, feeAmount);
        }

        amount = amount - feeAmount;
        tok.token.safeTransferFrom(msg.sender, address(this), amount);

        orders[nextOrderId] = Order(
            nextOrderId,
            tokenId,
            msg.sender,
            target,
            amount,
            tok.token.decimals(),
            destination
        );
        orderIds.add(nextOrderId);

        emit OrderCreated(nextOrderId, orders[nextOrderId], feeAmount);
        nextOrderId++;
    }

    function close(uint orderId) external onlyTrusted {
        orderIds.remove(orderId);
    }

    function completeOrder(uint orderId, uint8 dstFrom, uint16 tokenId, address payable to, uint amount, uint decimals) external onlyTrusted {
        bytes32 orderHash = keccak256(abi.encodePacked(orderId, dstFrom));
        require (completed[orderHash] == false, "already transfered");

        Token storage tok = tokens[tokenId];
        require(address(tok.token) != address(0), "unknown token");

        tok.token.safeTransfer(to, convertAmount(tok.token, amount, decimals));
        completed[orderHash] = true;

        uint bonus = Math.min(tok.bonus, address(this).balance);
        if (bonus > 0) {
            to.transfer(bonus);
        }

        emit OrderCompleted(orderId, dstFrom);
    }

    function withdraw(uint16 tokenId, address to, uint amount, uint8 inputDecimals) external onlyTrusted {
        Token storage tok = tokens[tokenId];
        tok.token.safeTransfer(to, convertAmount(tok.token, amount, inputDecimals));
    }

    function isCompleted(uint orderId, uint8 dstFrom) external view returns (bool) {
        return completed[keccak256(abi.encodePacked(orderId, dstFrom))];
    }

    function listOrders() external view returns (Order[] memory) {
        Order[] memory list = new Order[](orderIds.length());
        for (uint i = 0; i < orderIds.length(); i++) {
            list[i] = orders[orderIds.at(i)];
        }

        return list;
    }

    function listTokensNames() external view returns (string[] memory) {
        string[] memory list = new string[](tokensLength);
        for (uint16 i = 0; i < tokensLength; i++) {
            if (address(tokens[i].token) != address(0)) {
                list[i] = tokens[i].token.symbol();
            }
        }

        return list;
    }


    receive() external payable {}
}

File 2 of 10 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The defaut value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overloaded;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        _approve(sender, _msgSender(), currentAllowance - amount);

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);

        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        _balances[sender] = senderBalance - amount;
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        _balances[account] = accountBalance - amount;
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

File 3 of 10 : SafeERC20.sol
// SPDX-License-Identifier: MIT

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'
        // solhint-disable-next-line max-line-length
        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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 4 of 10 : EnumerableSet.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;

        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) { // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }


    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

File 5 of 10 : Math.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }
}

File 6 of 10 : Trustable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

abstract contract Trustable is Ownable {
    mapping(address=>bool) public _isTrusted;
    modifier onlyTrusted {
        require(_isTrusted[msg.sender] || msg.sender == owner(), "not trusted");
        _;
    }

    function addTrusted(address user) public onlyOwner {
        _isTrusted[user] = true;
    }

    function removeTrusted(address user) public onlyOwner {
        _isTrusted[user] = false;
    }
}

File 7 of 10 : IERC20.sol
// SPDX-License-Identifier: MIT

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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, 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 10 : Context.sol
// SPDX-License-Identifier: MIT

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) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 9 of 10 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 10 of 10 : Ownable.sol
// SPDX-License-Identifier: MIT

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 () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"uint8","name":"dstFrom","type":"uint8"}],"name":"OrderCompleted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"components":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"target","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint8","name":"decimals","type":"uint8"},{"internalType":"uint8","name":"destination","type":"uint8"}],"indexed":false,"internalType":"struct Bridge.Order","name":"order","type":"tuple"},{"indexed":false,"internalType":"uint256","name":"fee","type":"uint256"}],"name":"OrderCreated","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"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"_isTrusted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"addTrusted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"orderId","type":"uint256"}],"name":"close","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"orderId","type":"uint256"},{"internalType":"uint8","name":"dstFrom","type":"uint8"},{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"address payable","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"decimals","type":"uint256"}],"name":"completeOrder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"completed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint8","name":"destination","type":"uint8"},{"internalType":"address","name":"target","type":"address"}],"name":"create","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"orderId","type":"uint256"},{"internalType":"uint8","name":"dstFrom","type":"uint8"}],"name":"isCompleted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"listOrders","outputs":[{"components":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"target","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint8","name":"decimals","type":"uint8"},{"internalType":"uint8","name":"destination","type":"uint8"}],"internalType":"struct Bridge.Order[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"listTokensNames","outputs":[{"internalType":"string[]","name":"","type":"string[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"orders","outputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"target","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint8","name":"decimals","type":"uint8"},{"internalType":"uint8","name":"destination","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"removeTrusted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"uint256","name":"bonus","type":"uint256"}],"name":"setBonus","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"uint256","name":"dailyLimit","type":"uint256"},{"internalType":"uint8","name":"inputDecimals","type":"uint8"}],"name":"setDailyLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"uint16","name":"fee","type":"uint16"}],"name":"setFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"uint256","name":"feeBase","type":"uint256"},{"internalType":"uint8","name":"inputDecimals","type":"uint8"}],"name":"setFeeBase","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"address","name":"feeTarget","type":"address"}],"name":"setFeeTarget","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"uint256","name":"maxAmount","type":"uint256"},{"internalType":"uint8","name":"inputDecimals","type":"uint8"}],"name":"setMaxAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"uint256","name":"minAmount","type":"uint256"},{"internalType":"uint8","name":"inputDecimals","type":"uint8"}],"name":"setMinAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"uint16","name":"fee","type":"uint16"},{"internalType":"uint256","name":"feeBase","type":"uint256"},{"internalType":"address","name":"feeTarget","type":"address"},{"internalType":"uint256","name":"minAmount","type":"uint256"},{"internalType":"uint256","name":"maxAmount","type":"uint256"},{"internalType":"uint256","name":"dailyLimit","type":"uint256"},{"internalType":"uint8","name":"inputDecimals","type":"uint8"}],"name":"setToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"},{"internalType":"address","name":"","type":"address"}],"name":"stats","outputs":[{"internalType":"uint256","name":"transfered","type":"uint256"},{"internalType":"uint256","name":"limitFrom","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"}],"name":"tokens","outputs":[{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"uint16","name":"fee","type":"uint16"},{"internalType":"uint256","name":"feeBase","type":"uint256"},{"internalType":"address","name":"feeTarget","type":"address"},{"internalType":"uint256","name":"minAmount","type":"uint256"},{"internalType":"uint256","name":"maxAmount","type":"uint256"},{"internalType":"uint256","name":"dailyLimit","type":"uint256"},{"internalType":"uint256","name":"bonus","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"tokenId","type":"uint16"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint8","name":"inputDecimals","type":"uint8"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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