Contract Address Details
Official token

0xe44Fd7fCb2b1581822D0c862B68222998a0c299a

Token
Wrapped Ether (WETH)
Creator
0x19adf8–cce19d at 0xec8eaf–d15bec
Balance
0 CRO ( )
Tokens
Fetching tokens...
Transactions
155,262 Transactions
Transfers
25 Transfers
Gas Used
6,510,123,621
Last Balance Update
5899298
Contract name:
CronosCRC20




Optimization enabled
false
Compiler version
v0.6.11+commit.5ef660b1




EVM Version
default




Verified at
2021-12-23T16:20:54.188854Z

Constructor Arguments

000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000d577261707065642045746865720000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045745544800000000000000000000000000000000000000000000000000000000

Arg [0] (string) : Wrapped Ether
Arg [1] (string) : WETH
Arg [2] (uint8) : 18

              

Contract source code

// File contracts/ModuleCRC20.sol

// SPDX-License-Identifier: GNU-3
pragma solidity >0.4.13 >=0.4.23 >=0.6.11 <0.7.0;

////// lib/ds-token/lib/ds-auth/src/auth.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/* pragma solidity >=0.4.23; */

interface DSAuthority {
    function canCall(
        address src, address dst, bytes4 sig
    ) external view returns (bool);
}

contract DSAuthEvents {
    event LogSetAuthority (address indexed authority);
    event LogSetOwner     (address indexed owner);
}

contract DSAuth is DSAuthEvents {
    DSAuthority  public  authority;
    address      public  owner;

    constructor() public {
        owner = msg.sender;
        emit LogSetOwner(msg.sender);
    }

    function setOwner(address owner_)
    public
    auth
    {
        owner = owner_;
        emit LogSetOwner(owner);
    }

    function setAuthority(DSAuthority authority_)
    public
    auth
    {
        authority = authority_;
        emit LogSetAuthority(address(authority));
    }

    modifier auth {
        require(isAuthorized(msg.sender, msg.sig), "ds-auth-unauthorized");
        _;
    }

    function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
        if (src == address(this)) {
            return true;
        } else if (src == owner) {
            return true;
        } else if (authority == DSAuthority(address(0))) {
            return false;
        } else {
            return authority.canCall(src, address(this), sig);
        }
    }
}

////// lib/ds-token/lib/ds-math/src/math.sol
/// math.sol -- mixin for inline numerical wizardry

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/* pragma solidity >0.4.13; */

contract DSMath {
    function add(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x, "ds-math-add-overflow");
    }
    function sub(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x, "ds-math-sub-underflow");
    }
    function mul(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x, "ds-math-mul-overflow");
    }

    function min(uint x, uint y) internal pure returns (uint z) {
        return x <= y ? x : y;
    }
    function max(uint x, uint y) internal pure returns (uint z) {
        return x >= y ? x : y;
    }
    function imin(int x, int y) internal pure returns (int z) {
        return x <= y ? x : y;
    }
    function imax(int x, int y) internal pure returns (int z) {
        return x >= y ? x : y;
    }

    uint constant WAD = 10 ** 18;
    uint constant RAY = 10 ** 27;

    //rounds to zero if x*y < WAD / 2
    function wmul(uint x, uint y) internal pure returns (uint z) {
        z = add(mul(x, y), WAD / 2) / WAD;
    }
    //rounds to zero if x*y < WAD / 2
    function rmul(uint x, uint y) internal pure returns (uint z) {
        z = add(mul(x, y), RAY / 2) / RAY;
    }
    //rounds to zero if x*y < WAD / 2
    function wdiv(uint x, uint y) internal pure returns (uint z) {
        z = add(mul(x, WAD), y / 2) / y;
    }
    //rounds to zero if x*y < RAY / 2
    function rdiv(uint x, uint y) internal pure returns (uint z) {
        z = add(mul(x, RAY), y / 2) / y;
    }

    // This famous algorithm is called "exponentiation by squaring"
    // and calculates x^n with x as fixed-point and n as regular unsigned.
    //
    // It's O(log n), instead of O(n) for naive repeated multiplication.
    //
    // These facts are why it works:
    //
    //  If n is even, then x^n = (x^2)^(n/2).
    //  If n is odd,  then x^n = x * x^(n-1),
    //   and applying the equation for even x gives
    //    x^n = x * (x^2)^((n-1) / 2).
    //
    //  Also, EVM division is flooring and
    //    floor[(n-1) / 2] = floor[n / 2].
    //
    function rpow(uint x, uint n) internal pure returns (uint z) {
        z = n % 2 != 0 ? x : RAY;

        for (n /= 2; n != 0; n /= 2) {
            x = rmul(x, x);

            if (n % 2 != 0) {
                z = rmul(z, x);
            }
        }
    }
}

////// lib/ds-token/src/token.sol
/// token.sol -- ERC20 implementation with minting and burning

// Copyright (C) 2015, 2016, 2017  DappHub, LLC

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/* pragma solidity >=0.4.23; */

/* import "ds-math/math.sol"; */
/* import "ds-auth/auth.sol"; */


contract DSToken is DSMath, DSAuth {
    bool                                              public  stopped;
    uint256                                           public  totalSupply;
    mapping (address => uint256)                      public  balanceOf;
    mapping (address => mapping (address => uint256)) public  allowance;
    string                                            public  symbol;
    uint8                                             public  decimals = 18; // standard token precision. override to customize
    string                                            public  name = "";     // Optional token name


    constructor(string memory symbol_) public {
        symbol = symbol_;
    }

    event Approval(address indexed src, address indexed guy, uint wad);
    event Transfer(address indexed src, address indexed dst, uint wad);
    event Mint(address indexed guy, uint wad);
    event Burn(address indexed guy, uint wad);
    event Stop();
    event Start();

    modifier stoppable {
        require(!stopped, "ds-stop-is-stopped");
        _;
    }

    function approve(address guy) external returns (bool) {
        return approve(guy, uint(-1));
    }

    function approve(address guy, uint wad) public stoppable returns (bool) {
        allowance[msg.sender][guy] = wad;

        emit Approval(msg.sender, guy, wad);

        return true;
    }

    function transfer(address dst, uint wad) external returns (bool) {
        return transferFrom(msg.sender, dst, wad);
    }

    function transferFrom(address src, address dst, uint wad)
    public
    stoppable
    returns (bool)
    {
        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
            require(allowance[src][msg.sender] >= wad, "ds-token-insufficient-approval");
            allowance[src][msg.sender] = sub(allowance[src][msg.sender], wad);
        }

        require(balanceOf[src] >= wad, "ds-token-insufficient-balance");
        balanceOf[src] = sub(balanceOf[src], wad);
        balanceOf[dst] = add(balanceOf[dst], wad);

        emit Transfer(src, dst, wad);

        return true;
    }

    function push(address dst, uint wad) external {
        transferFrom(msg.sender, dst, wad);
    }

    function pull(address src, uint wad) external {
        transferFrom(src, msg.sender, wad);
    }

    function move(address src, address dst, uint wad) external {
        transferFrom(src, dst, wad);
    }


    function mint(uint wad) external {
        mint(msg.sender, wad);
    }

    function burn(uint wad) external {
        burn(msg.sender, wad);
    }

    function mint(address guy, uint wad) public auth stoppable {
        balanceOf[guy] = add(balanceOf[guy], wad);
        totalSupply = add(totalSupply, wad);
        emit Mint(guy, wad);
    }

    function burn(address guy, uint wad) public auth stoppable {
        if (guy != msg.sender && allowance[guy][msg.sender] != uint(-1)) {
            require(allowance[guy][msg.sender] >= wad, "ds-token-insufficient-approval");
            allowance[guy][msg.sender] = sub(allowance[guy][msg.sender], wad);
        }

        require(balanceOf[guy] >= wad, "ds-token-insufficient-balance");
        balanceOf[guy] = sub(balanceOf[guy], wad);
        totalSupply = sub(totalSupply, wad);
        emit Burn(guy, wad);
    }

    function stop() public auth {
        stopped = true;
        emit Stop();
    }

    function start() public auth {
        stopped = false;
        emit Start();
    }


    function setName(string memory name_) public auth {
        name = name_;
    }
}

////// src/ModuleCRC20.sol
/* pragma solidity ^0.6.11; */

/* import "ds-token/token.sol"; */

contract ModuleCRC20 is DSToken  {
    // sha256('cronos')[:20]
    address constant module_address = 0x89A7EF2F08B1c018D5Cc88836249b84Dd5392905;
    string denom;

    event __CronosSendToEthereum(address recipient, uint256 amount, uint256 bridge_fee);
    event __CronosSendToIbc(address sender, string recipient, uint256 amount);

    constructor(string memory denom_, uint8 decimals_) DSToken(denom_) public {
        decimals = decimals_;
        denom = denom_;
    }

    // unsafe_burn burn tokens without user's approval and authentication, used internally
    function unsafe_burn(address addr, uint amount) private {
        // Deduct user's balance without approval
        require(balanceOf[addr] >= amount, "ds-token-insufficient-balance");
        balanceOf[addr] = sub(balanceOf[addr], amount);
        totalSupply = sub(totalSupply, amount);
        emit Burn(addr, amount);
    }

    function native_denom() public view returns (string memory) {
        return denom;
    }

    function mint_by_cronos_module(address addr, uint amount) public {
        require(msg.sender == module_address);
        mint(addr, amount);
    }

    function burn_by_cronos_module(address addr, uint amount) public {
        require(msg.sender == module_address);
        unsafe_burn(addr, amount);
    }

    // send to ethereum through gravity bridge
    function send_to_ethereum(address recipient, uint amount, uint bridge_fee) external {
        unsafe_burn(msg.sender, add(amount, bridge_fee));
        emit __CronosSendToEthereum(recipient, amount, bridge_fee);
    }

    // send an "amount" of the contract token to recipient through IBC
    function send_to_ibc(string memory recipient, uint amount) public {
        unsafe_burn(msg.sender, amount);
        emit __CronosSendToIbc(msg.sender, recipient, amount);
    }
}


// File contracts/CronosCRC20.sol

pragma solidity 0.6.11;

contract CronosCRC20 is ModuleCRC20 {
    constructor (
        string memory _name,
        string memory _denom,
        uint8 _decimal
    ) ModuleCRC20(_denom, _decimal) public {
        setName(_name);
    }
}
        

Contract ABI

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DSAuthority"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setName","inputs":[{"type":"string","name":"name_","internalType":"string"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setOwner","inputs":[{"type":"address","name":"owner_","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"start","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"stop","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"stopped","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"symbol","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalSupply","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer","inputs":[{"type":"address","name":"dst","internalType":"address"},{"type":"uint256","name":"wad","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transferFrom","inputs":[{"type":"address","name":"src","internalType":"address"},{"type":"address","name":"dst","internalType":"address"},{"type":"uint256","name":"wad","internalType":"uint256"}]}]
            

Deployed ByteCode

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