Contract 0x9CD619c50562a38edBdC3451ade7B58CaA71Ab32 1

 
Txn Hash Method
Index
From
To
Value
0x10f5cf80d42bda0b28211ce74230cb2cb2908c686fb8b353bccddb77d8be1be3Swap ETH And Red...134688522022-06-29 15:23:115 days 9 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.797067950798036 Ether0.0003110673720.001
0x5cd4f4675d705adbff673ad3f8aa1eac21b5f3dae3ef444fa2171c2290ac9100Swap ETH And Red...134646482022-06-29 14:15:125 days 10 hrs ago0x39f859dcf71102e670371aed0f89e1d9830d6364 IN  Synapse: Bridge Zap0.002021547477821 Ether0.0005304222830.001
0x14f59f0bb469e80384d5cae10fcdc9222c95616ba57226c95caa4861422da54dSwap ETH And Red...134642652022-06-29 14:09:465 days 10 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.749859297961032 Ether0.0005124151060.001
0x39990cb47514294241bc6792b41d77cf4ecb8a6ec9239b0a419920810e217a52Swap ETH And Red...134639332022-06-29 14:05:195 days 10 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.740226790874949 Ether0.0005953674840.001
0x512af57182930ce7259f6ad1ed75129f5ee27bdb4d213e40edf7871242aa139eSwap ETH And Red...134633322022-06-29 13:58:345 days 10 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.7190867871376 Ether0.0005269703860.001
0x8310be6a7c6d6c5e7459b374a9ee27f87ca52ce520b1822f6969889fa205a83eSwap ETH And Red...134625562022-06-29 13:50:545 days 11 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.74016504344788 Ether0.0003029837830.001
0x7128a9a4d658ea261b6309aa7ba3de9166634be0f44f78eae2a452ad342c29d4Swap ETH And Red...134531762022-06-29 11:36:425 days 13 hrs ago0x6585eea711a9d4f6a1f876e69b53afab136b488a IN  Synapse: Bridge Zap0.003117899618938 Ether0.000186545920.001
0xf74bff0be2f8aacd739c28ac3a5695c20831b83bb56f1443c16f256e2ee79b9eSwap ETH And Red...134529312022-06-29 11:33:215 days 13 hrs ago0xe3bff9fe31d149f2503857d743066499eee5d322 IN  Synapse: Bridge Zap0.008380970864665 Ether0.0002119194570.001
0xace42c369ce495b6f2949efb5e9adb45d4128a7cf87faf28c091037588861559Swap ETH And Red...134525602022-06-29 11:28:005 days 13 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.707045346138946 Ether0.0001106163510.001
0x39d21fa68cadc2dee87aaee0e8f997427770f027dfd1ce3ed8e7773e0f2b8874Swap ETH And Red...134513282022-06-29 11:16:025 days 13 hrs ago0x00d3e4e30f4f102c3d7ed6db4475acea2c03beda IN  Synapse: Bridge Zap0.008781754548857 Ether0.000116137340.001
0xf728e59f3307ec1228fd392b3438f1c55b5fb73a7e6f02b021cd7e40dfbff906Swap ETH And Red...134510352022-06-29 11:12:555 days 13 hrs ago0x853cc478f138da19a7df4350e3e4bf768d991f8f IN  Synapse: Bridge Zap0.010319673877368 Ether0.0001342454350.001
0x8cc709750c46426895154f30b76f9106e510b8a0c3139dc883da98870fab3f27Swap ETH And Red...134505852022-06-29 11:07:505 days 13 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.786080830192569 Ether0.0001322543910.001
0x3b03e9a856b06906017d58ca6b440cabfb3269564e71db8eb497703b5672c6baSwap ETH And Red...134457702022-06-29 9:33:345 days 15 hrs ago0xbed0f764f9abceaac68719f1af08c571e34581d3 IN  Synapse: Bridge Zap0.004889838111097 Ether0.0001072639680.001
0x78cba3abd934cf4eabd3de734cd23a0b5726327bfc186170d84ddd3191def44cSwap ETH And Red...134453132022-06-29 9:28:435 days 15 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.879405911216684 Ether0.0001283752620.001
0x4d8163d61720786e6ddc736a22160a81a1b5e2ca1d0c93dff10483ef00620979Swap ETH And Red...134445962022-06-29 9:18:475 days 15 hrs ago0x38da5a97e682b5aab58b0112140c3b6777e5af47 IN  Synapse: Bridge Zap0.885001534439669 Ether0.000181835280.001
0x9bbcd7cd7de72e2ed8e7eaf15cef82b4ac05ddc229f8e31e307fb41d0f5fe718Swap ETH And Red...134436642022-06-29 9:04:055 days 15 hrs ago0x0b70753438d5984f349e9139b1050eeb53650e92 IN  Synapse: Bridge Zap0.918597463063294 Ether0.0002128783360.001
0x30df48437cdbb4fd63fd9bb7cef7b3bedb14713aed058ebb83bd095c63e4a028Swap ETH And Red...134430212022-06-29 8:50:325 days 16 hrs ago0x0b70753438d5984f349e9139b1050eeb53650e92 IN  Synapse: Bridge Zap0.922552206851024 Ether0.0001869572320.001
0x2d8e57467f70662d5cdbfe6326069a28b112ca31ef301607aeaa3baefd0e961aSwap ETH And Red...134413852022-06-29 8:18:175 days 16 hrs ago0x0b70753438d5984f349e9139b1050eeb53650e92 IN  Synapse: Bridge Zap0.048419055104462 Ether0.0001506592310.001
0x78d0aaa0d91b2611b65a2fcd5940b60cfd3983eeb53c1a85c968103f498f6212Swap ETH And Red...134409992022-06-29 8:08:125 days 16 hrs ago0x0b70753438d5984f349e9139b1050eeb53650e92 IN  Synapse: Bridge Zap0.048634588194055 Ether0.0001772225790.001
0x8f7cf59daddf902f669e32e8846d1b089ecddcffc834889574ee3c5fbd322c66Swap ETH And Red...117865482022-06-14 20:43:1320 days 4 hrs ago0x5e7ebd5521e724bb4c7ea8663b71d64625bf6b4c IN  Synapse: Bridge Zap0.010126209931095 Ether0.0003025115420.001
0x7982706fa35a1f2bb8ffd3420e455841c8e672d4e968152bcdf8dee9a6f6c9ebSwap ETH And Red...109466592022-06-08 12:41:4026 days 12 hrs ago0xe7d4d5aea169afcaa903bbf1f8bbb1e514645df7 IN  Synapse: Bridge Zap0.01 Ether0.0002226577450.001
0x7416ca3e812a5b4091077939e77f6c8f4c70ca940baecbd56886bf85cb6587e4Swap ETH And Red...106849272022-06-05 23:50:0129 days 1 hr ago0x31a2b7adc469c1c02c294efee837c350c7a922b8 IN  Synapse: Bridge Zap1.520669342857711 Ether0.0002500544310.001
0x16a089d27fc91beceefd0ec80be488717e3b1ac8e20440f800bec15989102aafRedeem And Swap106536062022-06-05 14:36:4929 days 10 hrs ago0xc0f211231c40f58be0d92fbed1a43eec815967ff IN  Synapse: Bridge Zap0 Ether0.0005430069350.001
0x0210719549b0601b8459054ca77f8a563aa4436bd21a9ba5362a456260938e8dSwap ETH And Red...105135042022-06-04 6:36:2730 days 18 hrs ago0x8564b8f4ce5ec63254a9a13295680ceb1b57fa52 IN  Synapse: Bridge Zap0.9 Ether0.0002983199370.001
0x1dacc29b000a9bfcabf310ba59c9fd3c3d50ae15894244bea0270be2a69ac894Swap ETH And Red...91968502022-05-28 11:15:4937 days 13 hrs ago0x859481ee6854f4078dd19d50dcf10919dfae6786 IN  Synapse: Bridge Zap0.01 Ether0.0000864205790.001
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x10f5cf80d42bda0b28211ce74230cb2cb2908c686fb8b353bccddb77d8be1be3134688522022-06-29 15:23:115 days 9 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0x10f5cf80d42bda0b28211ce74230cb2cb2908c686fb8b353bccddb77d8be1be3134688522022-06-29 15:23:115 days 9 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0x10f5cf80d42bda0b28211ce74230cb2cb2908c686fb8b353bccddb77d8be1be3134688522022-06-29 15:23:115 days 9 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.797067950798036968 Ether
0x5cd4f4675d705adbff673ad3f8aa1eac21b5f3dae3ef444fa2171c2290ac9100134646482022-06-29 14:15:125 days 10 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0x5cd4f4675d705adbff673ad3f8aa1eac21b5f3dae3ef444fa2171c2290ac9100134646482022-06-29 14:15:125 days 10 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0x5cd4f4675d705adbff673ad3f8aa1eac21b5f3dae3ef444fa2171c2290ac9100134646482022-06-29 14:15:125 days 10 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.002021547477821004 Ether
0x14f59f0bb469e80384d5cae10fcdc9222c95616ba57226c95caa4861422da54d134642652022-06-29 14:09:465 days 10 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0x14f59f0bb469e80384d5cae10fcdc9222c95616ba57226c95caa4861422da54d134642652022-06-29 14:09:465 days 10 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0x14f59f0bb469e80384d5cae10fcdc9222c95616ba57226c95caa4861422da54d134642652022-06-29 14:09:465 days 10 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.749859297961032219 Ether
0x39990cb47514294241bc6792b41d77cf4ecb8a6ec9239b0a419920810e217a52134639332022-06-29 14:05:195 days 10 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0x39990cb47514294241bc6792b41d77cf4ecb8a6ec9239b0a419920810e217a52134639332022-06-29 14:05:195 days 10 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0x39990cb47514294241bc6792b41d77cf4ecb8a6ec9239b0a419920810e217a52134639332022-06-29 14:05:195 days 10 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.740226790874949246 Ether
0x512af57182930ce7259f6ad1ed75129f5ee27bdb4d213e40edf7871242aa139e134633322022-06-29 13:58:345 days 10 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0x512af57182930ce7259f6ad1ed75129f5ee27bdb4d213e40edf7871242aa139e134633322022-06-29 13:58:345 days 10 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0x512af57182930ce7259f6ad1ed75129f5ee27bdb4d213e40edf7871242aa139e134633322022-06-29 13:58:345 days 10 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.719086787137600598 Ether
0x8310be6a7c6d6c5e7459b374a9ee27f87ca52ce520b1822f6969889fa205a83e134625562022-06-29 13:50:545 days 11 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0x8310be6a7c6d6c5e7459b374a9ee27f87ca52ce520b1822f6969889fa205a83e134625562022-06-29 13:50:545 days 11 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0x8310be6a7c6d6c5e7459b374a9ee27f87ca52ce520b1822f6969889fa205a83e134625562022-06-29 13:50:545 days 11 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.740165043447880983 Ether
0x7128a9a4d658ea261b6309aa7ba3de9166634be0f44f78eae2a452ad342c29d4134531762022-06-29 11:36:425 days 13 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0x7128a9a4d658ea261b6309aa7ba3de9166634be0f44f78eae2a452ad342c29d4134531762022-06-29 11:36:425 days 13 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0x7128a9a4d658ea261b6309aa7ba3de9166634be0f44f78eae2a452ad342c29d4134531762022-06-29 11:36:425 days 13 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.003117899618938559 Ether
0xf74bff0be2f8aacd739c28ac3a5695c20831b83bb56f1443c16f256e2ee79b9e134529312022-06-29 11:33:215 days 13 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
0xf74bff0be2f8aacd739c28ac3a5695c20831b83bb56f1443c16f256e2ee79b9e134529312022-06-29 11:33:215 days 13 hrs ago Synapse: Bridge Zap 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee90 Ether
0xf74bff0be2f8aacd739c28ac3a5695c20831b83bb56f1443c16f256e2ee79b9e134529312022-06-29 11:33:215 days 13 hrs ago Synapse: Bridge Zap 0x121ab82b49b2bc4c7901ca46b8277962b43502040.008380970864665938 Ether
0xace42c369ce495b6f2949efb5e9adb45d4128a7cf87faf28c091037588861559134525602022-06-29 11:28:005 days 13 hrs ago Synapse: Bridge Zap Synapse: Bridge0 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
L2BridgeZap

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 10000 runs

Other Settings:
default evmVersion, MIT license
File 1 of 11 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

File 2 of 11 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.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 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) public {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

    /**
     * @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 {_setupDecimals} is
     * called.
     *
     * 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 _decimals;
    }

    /**
     * @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);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        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].add(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) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        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);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(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 = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(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);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(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 Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }

    /**
     * @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 11 : ERC20Burnable.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../../utils/Context.sol";
import "./ERC20.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    using SafeMath for uint256;

    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");

        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}

File 4 of 11 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 5 of 11 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC20.sol";
import "../../math/SafeMath.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 SafeMath for uint256;
    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).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _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 6 of 11 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <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 7 of 11 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 8 of 11 : ISwap.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import '@openzeppelin/contracts/token/ERC20/ERC20.sol';

interface ISwap {
  // pool data view functions
  function getA() external view returns (uint256);

  function getToken(uint8 index) external view returns (IERC20);

  function getTokenIndex(address tokenAddress) external view returns (uint8);

  function getTokenBalance(uint8 index) external view returns (uint256);

  function getVirtualPrice() external view returns (uint256);

  // min return calculation functions
  function calculateSwap(
    uint8 tokenIndexFrom,
    uint8 tokenIndexTo,
    uint256 dx
  ) external view returns (uint256);

  function calculateTokenAmount(uint256[] calldata amounts, bool deposit)
    external
    view
    returns (uint256);

  function calculateRemoveLiquidity(uint256 amount)
    external
    view
    returns (uint256[] memory);

  function calculateRemoveLiquidityOneToken(
    uint256 tokenAmount,
    uint8 tokenIndex
  ) external view returns (uint256 availableTokenAmount);

  // state modifying functions
  function initialize(
    IERC20[] memory pooledTokens,
    uint8[] memory decimals,
    string memory lpTokenName,
    string memory lpTokenSymbol,
    uint256 a,
    uint256 fee,
    uint256 adminFee,
    address lpTokenTargetAddress
  ) external;

  function swap(
    uint8 tokenIndexFrom,
    uint8 tokenIndexTo,
    uint256 dx,
    uint256 minDy,
    uint256 deadline
  ) external returns (uint256);

  function addLiquidity(
    uint256[] calldata amounts,
    uint256 minToMint,
    uint256 deadline
  ) external returns (uint256);

  function removeLiquidity(
    uint256 amount,
    uint256[] calldata minAmounts,
    uint256 deadline
  ) external returns (uint256[] memory);

  function removeLiquidityOneToken(
    uint256 tokenAmount,
    uint8 tokenIndex,
    uint256 minAmount,
    uint256 deadline
  ) external returns (uint256);

  function removeLiquidityImbalance(
    uint256[] calldata amounts,
    uint256 maxBurnAmount,
    uint256 deadline
  ) external returns (uint256);
}

File 9 of 11 : ISynapseBridge.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import '@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol';

interface ISynapseBridge {
  using SafeERC20 for IERC20;

  function deposit(
    address to,
    uint256 chainId,
    IERC20 token,
    uint256 amount
  ) external;

  function depositAndSwap(
    address to,
    uint256 chainId,
    IERC20 token,
    uint256 amount,
    uint8 tokenIndexFrom,
    uint8 tokenIndexTo,
    uint256 minDy,
    uint256 deadline
  ) external;

  function redeem(
    address to,
    uint256 chainId,
    IERC20 token,
    uint256 amount
  ) external;

  function redeemAndSwap(
    address to,
    uint256 chainId,
    IERC20 token,
    uint256 amount,
    uint8 tokenIndexFrom,
    uint8 tokenIndexTo,
    uint256 minDy,
    uint256 deadline
  ) external;

  function redeemAndRemove(
    address to,
    uint256 chainId,
    IERC20 token,
    uint256 amount,
    uint8 liqTokenIndex,
    uint256 liqMinAmount,
    uint256 liqDeadline
  ) external;
}

File 10 of 11 : IWETH9.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.4.0;

interface IWETH9 {
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);

    function balanceOf(address) external view returns (uint256);

    function allowance(address, address) external view returns (uint256);

    receive() external payable;

    function deposit() external payable;

    function withdraw(uint256 wad) external;

    function totalSupply() external view returns (uint256);

    function approve(address guy, uint256 wad) external returns (bool);

    function transfer(address dst, uint256 wad) external returns (bool);

    function transferFrom(
        address src,
        address dst,
        uint256 wad
    ) external returns (bool);
}

File 11 of 11 : L2BridgeZap.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../interfaces/ISwap.sol";
import "../interfaces/ISynapseBridge.sol";
import "../interfaces/IWETH9.sol";

contract L2BridgeZap {
    using SafeERC20 for IERC20;

    ISynapseBridge synapseBridge;
    address payable public immutable WETH_ADDRESS;

    mapping(address => address) public swapMap;
    mapping(address => IERC20[]) public swapTokensMap;

    uint256 constant MAX_UINT256 = 2**256 - 1;

    constructor(
        address payable _wethAddress,
        address _swapOne,
        address tokenOne,
        address _swapTwo,
        address tokenTwo,
        ISynapseBridge _synapseBridge
    ) public {
        WETH_ADDRESS = _wethAddress;
        synapseBridge = _synapseBridge;
        swapMap[tokenOne] = _swapOne;
        swapMap[tokenTwo] = _swapTwo;

        if (address(_swapOne) != address(0)) {
            {
                uint8 i;
                for (; i < 32; i++) {
                    try ISwap(_swapOne).getToken(i) returns (
                        IERC20 token
                    ) {
                        swapTokensMap[_swapOne].push(token);
                        token.safeApprove(address(_swapOne), MAX_UINT256);
                        token.safeApprove(address(synapseBridge), MAX_UINT256);
                    } catch {
                        break;
                    }
                }
                require(i > 1, "swap must have at least 2 tokens");
            }
        }
        if (address(_swapTwo) != address(0)) {
            {
                uint8 i;
                for (; i < 32; i++) {
                    try ISwap(_swapTwo).getToken(i) returns (
                        IERC20 token
                    ) {
                        swapTokensMap[_swapTwo].push(token);
                        token.safeApprove(address(_swapTwo), MAX_UINT256);
                        token.safeApprove(address(synapseBridge), MAX_UINT256);
                    } catch {
                        break;
                    }
                }
                require(i > 1, "swap must have at least 2 tokens");
            }
        }
    }

    /**
     * @notice Calculate amount of tokens you receive on swap
     * @param tokenIndexFrom the token the user wants to sell
     * @param tokenIndexTo the token the user wants to buy
     * @param dx the amount of tokens the user wants to sell. If the token charges
     * a fee on transfers, use the amount that gets transferred after the fee.
     * @return amount of tokens the user will receive
     */
    function calculateSwap(
        IERC20 token,
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx
    ) external view virtual returns (uint256) {
        ISwap swap = ISwap(
            swapMap[address(token)]
        );
        return swap.calculateSwap(tokenIndexFrom, tokenIndexTo, dx);
    }

    function swapAndRedeem(
        address to,
        uint256 chainId,
        IERC20 token,
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx,
        uint256 minDy,
        uint256 deadline
    ) external {
        ISwap swap = ISwap(swapMap[address(token)]);
        require(address(swap) != address(0), "Swap is 0x00");
        IERC20[] memory tokens = swapTokensMap[address(swap)];
        tokens[tokenIndexFrom].safeTransferFrom(
            msg.sender,
            address(this),
            dx
        );
        // swap

        uint256 swappedAmount = swap.swap(
            tokenIndexFrom,
            tokenIndexTo,
            dx,
            minDy,
            deadline
        );
        // deposit into bridge, gets nUSD
        if (
            token.allowance(address(this), address(synapseBridge)) <
            swappedAmount
        ) {
            token.safeApprove(address(synapseBridge), MAX_UINT256);
        }
        synapseBridge.redeem(to, chainId, token, swappedAmount);
    }

    function swapAndRedeemAndSwap(
        address to,
        uint256 chainId,
        IERC20 token,
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx,
        uint256 minDy,
        uint256 deadline,
        uint8 swapTokenIndexFrom,
        uint8 swapTokenIndexTo,
        uint256 swapMinDy,
        uint256 swapDeadline
    ) external {
        require(
            address(swapMap[address(token)]) != address(0),
            "Swap is 0x00"
        );
        IERC20[] memory tokens = swapTokensMap[
            swapMap[address(token)]
        ];
        tokens[tokenIndexFrom].safeTransferFrom(
            msg.sender,
            address(this),
            dx
        );
        // swap

        uint256 swappedAmount = ISwap(swapMap[address(token)]).swap(tokenIndexFrom, tokenIndexTo, dx, minDy, deadline);
        // deposit into bridge, gets nUSD
        if (
            token.allowance(address(this), address(synapseBridge)) <
            swappedAmount
        ) {
            token.safeApprove(address(synapseBridge), MAX_UINT256);
        }
        synapseBridge.redeemAndSwap(
            to,
            chainId,
            token,
            swappedAmount,
            swapTokenIndexFrom,
            swapTokenIndexTo,
            swapMinDy,
            swapDeadline
        );
    }

    function swapAndRedeemAndRemove(
        address to,
        uint256 chainId,
        IERC20 token,
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx,
        uint256 minDy,
        uint256 deadline,
        uint8 liqTokenIndex,
        uint256 liqMinAmount,
        uint256 liqDeadline
    ) external {
        ISwap swap = ISwap(swapMap[address(token)]);
        require(address(swap) != address(0), "Swap is 0x00");
        IERC20[] memory tokens = swapTokensMap[address(swap)];
        tokens[tokenIndexFrom].safeTransferFrom(
            msg.sender,
            address(this),
            dx
        );
        // swap

        uint256 swappedAmount = swap.swap(
            tokenIndexFrom,
            tokenIndexTo,
            dx,
            minDy,
            deadline
        );
        // deposit into bridge, gets nUSD
        if (
            token.allowance(address(this), address(synapseBridge)) <
            swappedAmount
        ) {
            token.safeApprove(address(synapseBridge), MAX_UINT256);
        }
        synapseBridge.redeemAndRemove(
            to,
            chainId,
            token,
            swappedAmount,
            liqTokenIndex,
            liqMinAmount,
            liqDeadline
        );
    }

    /**
     * @notice wraps SynapseBridge redeem()
     * @param to address on other chain to redeem underlying assets to
     * @param chainId which underlying chain to bridge assets onto
     * @param token ERC20 compatible token to deposit into the bridge
     * @param amount Amount in native token decimals to transfer cross-chain pre-fees
     **/
    function redeem(
        address to,
        uint256 chainId,
        IERC20 token,
        uint256 amount
    ) external {
        token.safeTransferFrom(msg.sender, address(this), amount);
        if (token.allowance(address(this), address(synapseBridge)) < amount) {
            token.safeApprove(address(synapseBridge), MAX_UINT256);
        }
        synapseBridge.redeem(to, chainId, token, amount);
    }

    /**
     * @notice wraps SynapseBridge redeem()
     * @param to address on other chain to redeem underlying assets to
     * @param chainId which underlying chain to bridge assets onto
     * @param token ERC20 compatible token to deposit into the bridge
     * @param amount Amount in native token decimals to transfer cross-chain pre-fees
     **/
    function deposit(
        address to,
        uint256 chainId,
        IERC20 token,
        uint256 amount
    ) external {
        token.safeTransferFrom(msg.sender, address(this), amount);
        if (token.allowance(address(this), address(synapseBridge)) < amount) {
            token.safeApprove(address(synapseBridge), MAX_UINT256);
        }
        synapseBridge.deposit(to, chainId, token, amount);
    }

    function swapETHAndRedeem(
        address to,
        uint256 chainId,
        IERC20 token,
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx,
        uint256 minDy,
        uint256 deadline
    ) external payable {
        require(WETH_ADDRESS != address(0), "WETH 0");
        require(msg.value > 0 && msg.value == dx, "INCORRECT MSG VALUE");
        ISwap swap = ISwap(swapMap[address(token)]);
        require(address(swap) != address(0), "Swap is 0x00");
        IWETH9(WETH_ADDRESS).deposit{value: msg.value}();

        // swap
        uint256 swappedAmount = swap.swap(
            tokenIndexFrom,
            tokenIndexTo,
            dx,
            minDy,
            deadline
        );
        synapseBridge.redeem(to, chainId, token, swappedAmount);
    }


    function swapETHAndRedeemAndSwap(
        address to,
        uint256 chainId,
        IERC20 token,
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx,
        uint256 minDy,
        uint256 deadline,
        uint8 swapTokenIndexFrom,
        uint8 swapTokenIndexTo,
        uint256 swapMinDy,
        uint256 swapDeadline
    ) external payable {
        require(WETH_ADDRESS != address(0), "WETH 0");
        require(msg.value > 0 && msg.value == dx, "INCORRECT MSG VALUE");
        ISwap swap = ISwap(swapMap[address(token)]);
        require(address(swap) != address(0), "Swap is 0x00");
        IWETH9(WETH_ADDRESS).deposit{value: msg.value}();

        // swap
        uint256 swappedAmount = swap.swap(
            tokenIndexFrom,
            tokenIndexTo,
            dx,
            minDy,
            deadline
        );
        synapseBridge.redeemAndSwap(to, chainId, token, swappedAmount,swapTokenIndexFrom,
            swapTokenIndexTo,
            swapMinDy,
            swapDeadline);
    }


    /**
     * @notice Wraps redeemAndSwap on SynapseBridge.sol
     * Relays to nodes that (typically) a wrapped synAsset ERC20 token has been burned and the underlying needs to be redeeemed on the native chain. This function indicates to the nodes that they should attempt to redeem the LP token for the underlying assets (E.g "swap" out of the LP token)
     * @param to address on other chain to redeem underlying assets to
     * @param chainId which underlying chain to bridge assets onto
     * @param token ERC20 compatible token to deposit into the bridge
     * @param amount Amount in native token decimals to transfer cross-chain pre-fees
     * @param tokenIndexFrom the token the user wants to swap from
     * @param tokenIndexTo the token the user wants to swap to
     * @param minDy the min amount the user would like to receive, or revert to only minting the SynERC20 token crosschain.
     * @param deadline latest timestamp to accept this transaction
     **/
    function redeemAndSwap(
        address to,
        uint256 chainId,
        IERC20 token,
        uint256 amount,
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 minDy,
        uint256 deadline
    ) external {
        token.safeTransferFrom(msg.sender, address(this), amount);
        if (token.allowance(address(this), address(synapseBridge)) < amount) {
            token.safeApprove(address(synapseBridge), MAX_UINT256);
        }
        synapseBridge.redeemAndSwap(
            to,
            chainId,
            token,
            amount,
            tokenIndexFrom,
            tokenIndexTo,
            minDy,
            deadline
        );
    }

    /**
     * @notice Wraps redeemAndRemove on SynapseBridge
     * Relays to nodes that (typically) a wrapped synAsset ERC20 token has been burned and the underlying needs to be redeeemed on the native chain. This function indicates to the nodes that they should attempt to redeem the LP token for the underlying assets (E.g "swap" out of the LP token)
     * @param to address on other chain to redeem underlying assets to
     * @param chainId which underlying chain to bridge assets onto
     * @param token ERC20 compatible token to deposit into the bridge
     * @param amount Amount of (typically) LP token to pass to the nodes to attempt to removeLiquidity() with to redeem for the underlying assets of the LP token
     * @param liqTokenIndex Specifies which of the underlying LP assets the nodes should attempt to redeem for
     * @param liqMinAmount Specifies the minimum amount of the underlying asset needed for the nodes to execute the redeem/swap
     * @param liqDeadline Specificies the deadline that the nodes are allowed to try to redeem/swap the LP token
     **/
    function redeemAndRemove(
        address to,
        uint256 chainId,
        IERC20 token,
        uint256 amount,
        uint8 liqTokenIndex,
        uint256 liqMinAmount,
        uint256 liqDeadline
    ) external {
        token.safeTransferFrom(msg.sender, address(this), amount);
        if (token.allowance(address(this), address(synapseBridge)) < amount) {
            token.safeApprove(address(synapseBridge), MAX_UINT256);
        }
        synapseBridge.redeemAndRemove(
            to,
            chainId,
            token,
            amount,
            liqTokenIndex,
            liqMinAmount,
            liqDeadline
        );
    }
}

Settings
{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address payable","name":"_wethAddress","type":"address"},{"internalType":"address","name":"_swapOne","type":"address"},{"internalType":"address","name":"tokenOne","type":"address"},{"internalType":"address","name":"_swapTwo","type":"address"},{"internalType":"address","name":"tokenTwo","type":"address"},{"internalType":"contract ISynapseBridge","name":"_synapseBridge","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"WETH_ADDRESS","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint8","name":"tokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"tokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"dx","type":"uint256"}],"name":"calculateSwap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"contract 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IERC20","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint8","name":"tokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"tokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"minDy","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"redeemAndSwap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint8","name":"tokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"tokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"dx","type":"uint256"},{"internalType":"uint256","name":"minDy","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapAndRedeem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint8","name":"tokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"tokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"dx","type":"uint256"},{"internalType":"uint256","name":"minDy","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"liqTokenIndex","type":"uint8"},{"internalType":"uint256","name":"liqMinAmount","type":"uint256"},{"internalType":"uint256","name":"liqDeadline","type":"uint256"}],"name":"swapAndRedeemAndRemove","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint8","name":"tokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"tokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"dx","type":"uint256"},{"internalType":"uint256","name":"minDy","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"swapTokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"swapTokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"swapMinDy","type":"uint256"},{"internalType":"uint256","name":"swapDeadline","type":"uint256"}],"name":"swapAndRedeemAndSwap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint8","name":"tokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"tokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"dx","type":"uint256"},{"internalType":"uint256","name":"minDy","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapETHAndRedeem","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint8","name":"tokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"tokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"dx","type":"uint256"},{"internalType":"uint256","name":"minDy","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"swapTokenIndexFrom","type":"uint8"},{"internalType":"uint8","name":"swapTokenIndexTo","type":"uint8"},{"internalType":"uint256","name":"swapMinDy","type":"uint256"},{"internalType":"uint256","name":"swapDeadline","type":"uint256"}],"name":"swapETHAndRedeemAndSwap","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"swapMap","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"swapTokensMap","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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

000000000000000000000000121ab82b49b2bc4c7901ca46b8277962b4350204000000000000000000000000e27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee9000000000000000000000000809dc529f07651bd43a172e8db6f4a7a0d77103600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000af41a65f786339e7911f4acdad6bd49426f2dc6b

-----Decoded View---------------
Arg [0] : _wethAddress (address): 0x121ab82b49b2bc4c7901ca46b8277962b4350204
Arg [1] : _swapOne (address): 0xe27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee9
Arg [2] : tokenOne (address): 0x809dc529f07651bd43a172e8db6f4a7a0d771036
Arg [3] : _swapTwo (address): 0x0000000000000000000000000000000000000000
Arg [4] : tokenTwo (address): 0x0000000000000000000000000000000000000000
Arg [5] : _synapseBridge (address): 0xaf41a65f786339e7911f4acdad6bd49426f2dc6b

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 000000000000000000000000121ab82b49b2bc4c7901ca46b8277962b4350204
Arg [1] : 000000000000000000000000e27bff97ce92c3e1ff7aa9f86781fdd6d48f5ee9
Arg [2] : 000000000000000000000000809dc529f07651bd43a172e8db6f4a7a0d771036
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [5] : 000000000000000000000000af41a65f786339e7911f4acdad6bd49426f2dc6b


Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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