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ERC-20
Overview
Max Total Supply
0.21 ERC20 ***
Holders
449
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 8 Decimals)
Balance
0.03506348 ERC20 ***Value
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
WrappedBitcoin
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 1000000 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.20; import {ERC20} from "solmate/tokens/ERC20.sol"; import {Owned} from "solmate/auth/Owned.sol"; import {IBitcoin} from "../interfaces/IBitcoin.sol"; import {DropBox} from "./DropBox.sol"; contract WrappedBitcoin is ERC20 { // ============================================================= // ERRORS // ============================================================= error DropBoxNotCreated(address owner); error DropBoxAlreadyExists(address owner); error DropBoxInsufficientBalance(address owner); error OwnerInsufficientBalance(address owner); // ============================================================= // EVENTS // ============================================================= event DropBoxCreated(address indexed owner); event Deposit(address indexed from, uint256 amount); event Withdrawal(address indexed to, uint256 amount); // ============================================================= // CONSTANTS // ============================================================= /// @dev The address of the underlying token. address private constant _UNDERLYING = address(0x853737186cb24D4152f979B9152F652b67F7e9b7); // ============================================================= // STORAGE // ============================================================= /// @notice The mapping of drop boxes. mapping(address => address) public dropBoxes; // ============================================================= // CONSTRUCTOR // ============================================================= constructor() ERC20("Wrapped Bitcoin", "WBTC", 8) {} // ============================================================= // FUNCTIONS // ============================================================= /// @notice Creates a drop box for the caller. function createDropBox() public { if (dropBoxes[msg.sender] != address(0)) revert DropBoxAlreadyExists(msg.sender); dropBoxes[msg.sender] = address(new DropBox(address(this))); emit DropBoxCreated(msg.sender); } /// @notice Deposits tokens into the wrapper. /// @param amount The amount of tokens to deposit. function deposit(uint256 amount) public { address dropBox = dropBoxes[msg.sender]; if (dropBox == address(0)) revert DropBoxNotCreated(msg.sender); if (IBitcoin(_UNDERLYING).balanceOf(dropBox) < amount) revert DropBoxInsufficientBalance(msg.sender); _mint(msg.sender, amount); DropBox(dropBox).collect(amount, IBitcoin(_UNDERLYING)); emit Deposit(msg.sender, amount); } /// @notice Withdraws tokens from the wrapper. /// @param amount The amount of tokens to withdraw. function withdraw(uint256 amount) public { if (balanceOf[msg.sender] < amount) revert OwnerInsufficientBalance(msg.sender); _burn(msg.sender, amount); IBitcoin(_UNDERLYING).transfer(msg.sender, amount); emit Withdrawal(msg.sender, amount); } /// @notice Returns the underlying token. function underlying() public pure returns (address) { return _UNDERLYING; } }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; /// @notice Modern and gas efficient ERC20 + EIP-2612 implementation. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol) /// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol) /// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it. abstract contract ERC20 { /*////////////////////////////////////////////////////////////// EVENTS //////////////////////////////////////////////////////////////*/ event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); /*////////////////////////////////////////////////////////////// METADATA STORAGE //////////////////////////////////////////////////////////////*/ string public name; string public symbol; uint8 public immutable decimals; /*////////////////////////////////////////////////////////////// ERC20 STORAGE //////////////////////////////////////////////////////////////*/ uint256 public totalSupply; mapping(address => uint256) public balanceOf; mapping(address => mapping(address => uint256)) public allowance; /*////////////////////////////////////////////////////////////// EIP-2612 STORAGE //////////////////////////////////////////////////////////////*/ uint256 internal immutable INITIAL_CHAIN_ID; bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR; mapping(address => uint256) public nonces; /*////////////////////////////////////////////////////////////// CONSTRUCTOR //////////////////////////////////////////////////////////////*/ constructor( string memory _name, string memory _symbol, uint8 _decimals ) { name = _name; symbol = _symbol; decimals = _decimals; INITIAL_CHAIN_ID = block.chainid; INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator(); } /*////////////////////////////////////////////////////////////// ERC20 LOGIC //////////////////////////////////////////////////////////////*/ function approve(address spender, uint256 amount) public virtual returns (bool) { allowance[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } function transfer(address to, uint256 amount) public virtual returns (bool) { balanceOf[msg.sender] -= amount; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += amount; } emit Transfer(msg.sender, to, amount); return true; } function transferFrom( address from, address to, uint256 amount ) public virtual returns (bool) { uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals. if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount; balanceOf[from] -= amount; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += amount; } emit Transfer(from, to, amount); return true; } /*////////////////////////////////////////////////////////////// EIP-2612 LOGIC //////////////////////////////////////////////////////////////*/ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual { require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED"); // Unchecked because the only math done is incrementing // the owner's nonce which cannot realistically overflow. unchecked { address recoveredAddress = ecrecover( keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256( abi.encode( keccak256( "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" ), owner, spender, value, nonces[owner]++, deadline ) ) ) ), v, r, s ); require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER"); allowance[recoveredAddress][spender] = value; } emit Approval(owner, spender, value); } function DOMAIN_SEPARATOR() public view virtual returns (bytes32) { return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator(); } function computeDomainSeparator() internal view virtual returns (bytes32) { return keccak256( abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(name)), keccak256("1"), block.chainid, address(this) ) ); } /*////////////////////////////////////////////////////////////// INTERNAL MINT/BURN LOGIC //////////////////////////////////////////////////////////////*/ function _mint(address to, uint256 amount) internal virtual { totalSupply += amount; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += amount; } emit Transfer(address(0), to, amount); } function _burn(address from, uint256 amount) internal virtual { balanceOf[from] -= amount; // Cannot underflow because a user's balance // will never be larger than the total supply. unchecked { totalSupply -= amount; } emit Transfer(from, address(0), amount); } }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; /// @notice Simple single owner authorization mixin. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Owned.sol) abstract contract Owned { /*////////////////////////////////////////////////////////////// EVENTS //////////////////////////////////////////////////////////////*/ event OwnershipTransferred(address indexed user, address indexed newOwner); /*////////////////////////////////////////////////////////////// OWNERSHIP STORAGE //////////////////////////////////////////////////////////////*/ address public owner; modifier onlyOwner() virtual { require(msg.sender == owner, "UNAUTHORIZED"); _; } /*////////////////////////////////////////////////////////////// CONSTRUCTOR //////////////////////////////////////////////////////////////*/ constructor(address _owner) { owner = _owner; emit OwnershipTransferred(address(0), _owner); } /*////////////////////////////////////////////////////////////// OWNERSHIP LOGIC //////////////////////////////////////////////////////////////*/ function transferOwnership(address newOwner) public virtual onlyOwner { owner = newOwner; emit OwnershipTransferred(msg.sender, newOwner); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.20; interface IBitcoin { function balanceOf(address owner) external returns (uint256); function transfer(address to, uint256 value) external returns (bool); function decimals() external returns (uint8); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.20; import {Owned} from "solmate/auth/Owned.sol"; import {IBitcoin} from "../interfaces/IBitcoin.sol"; contract DropBox is Owned { constructor(address owner_) Owned(owner_) {} function collect(uint256 value, IBitcoin underlying) public onlyOwner { underlying.transfer(owner, value); } }
{ "remappings": [ "ds-test/=lib/forge-std/lib/ds-test/src/", "forge-std/=lib/forge-std/src/", "solmate/=lib/solmate/src/" ], "optimizer": { "enabled": true, "runs": 1000000 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "ipfs", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "shanghai", "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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