Contract Address Details
Official token

0x062E66477Faf219F25D27dCED647BF57C3107d52

Token
Wrapped BTC (WBTC)
Creator
0x19adf8–cce19d at 0x6547c3–e48942
Balance
0 CRO
Tokens
Fetching tokens...
Transactions
50,031 Transactions
Transfers
4 Transfers
Gas Used
1,876,199,475
Last Balance Update
2912721
Contract name:
CronosCRC20




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




EVM Version
default




Verified at
2021-12-21 04:38:49.193726Z

Constructor Arguments

000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000b577261707065642042544300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045742544300000000000000000000000000000000000000000000000000000000

Arg [0] (string) : Wrapped BTC
Arg [1] (string) : WBTC
Arg [2] (uint8) : 8

              

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"}]}]
            

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