Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
3,370.58353955 tBTC
Holders
1,352 ( 0.074%)
Market
Price
$62,893.00 @ 23.542532 ETH (-1.49%)
Onchain Market Cap
$211,986,110.55
Circulating Supply Market Cap
$211,727,035.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.000000002443035309 tBTCValue
$0.00 ( ~0 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
TBTC
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.4; import "@thesis/solidity-contracts/contracts/token/ERC20WithPermit.sol"; import "@thesis/solidity-contracts/contracts/token/MisfundRecovery.sol"; contract TBTC is ERC20WithPermit, MisfundRecovery { constructor() ERC20WithPermit("tBTC v2", "tBTC") {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/access/Ownable.sol"; import "./IERC20WithPermit.sol"; import "./IReceiveApproval.sol"; /// @title ERC20WithPermit /// @notice Burnable ERC20 token with EIP2612 permit functionality. User can /// authorize a transfer of their token with a signature conforming /// EIP712 standard instead of an on-chain transaction from their /// address. Anyone can submit this signature on the user's behalf by /// calling the permit function, as specified in EIP2612 standard, /// paying gas fees, and possibly performing other actions in the same /// transaction. contract ERC20WithPermit is IERC20WithPermit, Ownable { /// @notice The amount of tokens owned by the given account. mapping(address => uint256) public override balanceOf; /// @notice The remaining number of tokens that spender will be /// allowed to spend on behalf of owner through `transferFrom` and /// `burnFrom`. This is zero by default. mapping(address => mapping(address => uint256)) public override allowance; /// @notice Returns the current nonce for EIP2612 permission for the /// provided token owner for a replay protection. Used to construct /// EIP2612 signature provided to `permit` function. mapping(address => uint256) public override nonces; uint256 public immutable cachedChainId; bytes32 public immutable cachedDomainSeparator; /// @notice Returns EIP2612 Permit message hash. Used to construct EIP2612 /// signature provided to `permit` function. bytes32 public constant override PERMIT_TYPEHASH = keccak256( "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" ); /// @notice The amount of tokens in existence. uint256 public override totalSupply; /// @notice The name of the token. string public override name; /// @notice The symbol of the token. string public override symbol; /// @notice The decimals places of the token. uint8 public constant override decimals = 18; constructor(string memory _name, string memory _symbol) { name = _name; symbol = _symbol; cachedChainId = block.chainid; cachedDomainSeparator = buildDomainSeparator(); } /// @notice Moves `amount` tokens from the caller's account to `recipient`. /// @return True if the operation succeeded, reverts otherwise. /// @dev Requirements: /// - `recipient` cannot be the zero address, /// - the caller must have a balance of at least `amount`. function transfer(address recipient, uint256 amount) external override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } /// @notice Moves `amount` tokens from `sender` to `recipient` using the /// allowance mechanism. `amount` is then deducted from the caller's /// allowance unless the allowance was made for `type(uint256).max`. /// @return True if the operation succeeded, reverts otherwise. /// @dev 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 ) external override returns (bool) { uint256 currentAllowance = allowance[sender][msg.sender]; if (currentAllowance != type(uint256).max) { require( currentAllowance >= amount, "Transfer amount exceeds allowance" ); _approve(sender, msg.sender, currentAllowance - amount); } _transfer(sender, recipient, amount); return true; } /// @notice EIP2612 approval made with secp256k1 signature. /// Users can authorize a transfer of their tokens with a signature /// conforming EIP712 standard, rather than an on-chain transaction /// from their address. Anyone can submit this signature on the /// user's behalf by calling the permit function, paying gas fees, /// and possibly performing other actions in the same transaction. /// @dev The deadline argument can be set to `type(uint256).max to create /// permits that effectively never expire. If the `amount` is set /// to `type(uint256).max` then `transferFrom` and `burnFrom` will /// not reduce an allowance. function permit( address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external override { /* solhint-disable-next-line not-rely-on-time */ require(deadline >= block.timestamp, "Permission expired"); // Validate `s` and `v` values for a malleability concern described in EIP2. // Only signatures with `s` value in the lower half of the secp256k1 // curve's order and `v` value of 27 or 28 are considered valid. require( uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "Invalid signature 's' value" ); require(v == 27 || v == 28, "Invalid signature 'v' value"); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256( abi.encode( PERMIT_TYPEHASH, owner, spender, amount, nonces[owner]++, deadline ) ) ) ); address recoveredAddress = ecrecover(digest, v, r, s); require( recoveredAddress != address(0) && recoveredAddress == owner, "Invalid signature" ); _approve(owner, spender, amount); } /// @notice Creates `amount` tokens and assigns them to `account`, /// increasing the total supply. /// @dev Requirements: /// - `recipient` cannot be the zero address. function mint(address recipient, uint256 amount) external onlyOwner { require(recipient != address(0), "Mint to the zero address"); beforeTokenTransfer(address(0), recipient, amount); totalSupply += amount; balanceOf[recipient] += amount; emit Transfer(address(0), recipient, amount); } /// @notice Destroys `amount` tokens from the caller. /// @dev Requirements: /// - the caller must have a balance of at least `amount`. function burn(uint256 amount) external override { _burn(msg.sender, amount); } /// @notice Destroys `amount` of tokens from `account` using the allowance /// mechanism. `amount` is then deducted from the caller's allowance /// unless the allowance was made for `type(uint256).max`. /// @dev Requirements: /// - `account` must have a balance of at least `amount`, /// - the caller must have allowance for `account`'s tokens of at least /// `amount`. function burnFrom(address account, uint256 amount) external override { uint256 currentAllowance = allowance[account][msg.sender]; if (currentAllowance != type(uint256).max) { require( currentAllowance >= amount, "Burn amount exceeds allowance" ); _approve(account, msg.sender, currentAllowance - amount); } _burn(account, amount); } /// @notice Calls `receiveApproval` function on spender previously approving /// the spender to withdraw from the caller multiple times, up to /// the `amount` amount. If this function is called again, it /// overwrites the current allowance with `amount`. Reverts if the /// approval reverted or if `receiveApproval` call on the spender /// reverted. /// @return True if both approval and `receiveApproval` calls succeeded. /// @dev If the `amount` is set to `type(uint256).max` then /// `transferFrom` and `burnFrom` will not reduce an allowance. function approveAndCall( address spender, uint256 amount, bytes memory extraData ) external override returns (bool) { if (approve(spender, amount)) { IReceiveApproval(spender).receiveApproval( msg.sender, amount, address(this), extraData ); return true; } return false; } /// @notice Sets `amount` as the allowance of `spender` over the caller's /// tokens. /// @return True if the operation succeeded. /// @dev If the `amount` is set to `type(uint256).max` then /// `transferFrom` and `burnFrom` will not reduce an allowance. /// 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 function approve(address spender, uint256 amount) public override returns (bool) { _approve(msg.sender, spender, amount); return true; } /// @notice Returns hash of EIP712 Domain struct with the token name as /// a signing domain and token contract as a verifying contract. /// Used to construct EIP2612 signature provided to `permit` /// function. /* solhint-disable-next-line func-name-mixedcase */ function DOMAIN_SEPARATOR() public view override returns (bytes32) { // As explained in EIP-2612, if the DOMAIN_SEPARATOR contains the // chainId and is defined at contract deployment instead of // reconstructed for every signature, there is a risk of possible replay // attacks between chains in the event of a future chain split. // To address this issue, we check the cached chain ID against the // current one and in case they are different, we build domain separator // from scratch. if (block.chainid == cachedChainId) { return cachedDomainSeparator; } else { return buildDomainSeparator(); } } /// @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. // slither-disable-next-line dead-code function beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} function _burn(address account, uint256 amount) internal { uint256 currentBalance = balanceOf[account]; require(currentBalance >= amount, "Burn amount exceeds balance"); beforeTokenTransfer(account, address(0), amount); balanceOf[account] = currentBalance - amount; totalSupply -= amount; emit Transfer(account, address(0), amount); } function _transfer( address sender, address recipient, uint256 amount ) private { require(sender != address(0), "Transfer from the zero address"); require(recipient != address(0), "Transfer to the zero address"); require(recipient != address(this), "Transfer to the token address"); beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = balanceOf[sender]; require(senderBalance >= amount, "Transfer amount exceeds balance"); balanceOf[sender] = senderBalance - amount; balanceOf[recipient] += amount; emit Transfer(sender, recipient, amount); } function _approve( address owner, address spender, uint256 amount ) private { require(owner != address(0), "Approve from the zero address"); require(spender != address(0), "Approve to the zero address"); allowance[owner][spender] = amount; emit Approval(owner, spender, amount); } function buildDomainSeparator() private view returns (bytes32) { return keccak256( abi.encode( keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ), keccak256(bytes(name)), keccak256(bytes("1")), block.chainid, address(this) ) ); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; /// @title MisfundRecovery /// @notice Allows the owner of the token contract extending MisfundRecovery /// to recover any ERC20 and ERC721 sent mistakenly to the token /// contract address. contract MisfundRecovery is Ownable { using SafeERC20 for IERC20; function recoverERC20( IERC20 token, address recipient, uint256 amount ) external onlyOwner { token.safeTransfer(recipient, amount); } function recoverERC721( IERC721 token, address recipient, uint256 tokenId, bytes calldata data ) external onlyOwner { token.safeTransferFrom(address(this), recipient, tokenId, data); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "./IApproveAndCall.sol"; /// @title IERC20WithPermit /// @notice Burnable ERC20 token with EIP2612 permit functionality. User can /// authorize a transfer of their token with a signature conforming /// EIP712 standard instead of an on-chain transaction from their /// address. Anyone can submit this signature on the user's behalf by /// calling the permit function, as specified in EIP2612 standard, /// paying gas fees, and possibly performing other actions in the same /// transaction. interface IERC20WithPermit is IERC20, IERC20Metadata, IApproveAndCall { /// @notice EIP2612 approval made with secp256k1 signature. /// Users can authorize a transfer of their tokens with a signature /// conforming EIP712 standard, rather than an on-chain transaction /// from their address. Anyone can submit this signature on the /// user's behalf by calling the permit function, paying gas fees, /// and possibly performing other actions in the same transaction. /// @dev The deadline argument can be set to `type(uint256).max to create /// permits that effectively never expire. function permit( address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /// @notice Destroys `amount` tokens from the caller. function burn(uint256 amount) external; /// @notice Destroys `amount` of tokens from `account`, deducting the amount /// from caller's allowance. function burnFrom(address account, uint256 amount) external; /// @notice Returns hash of EIP712 Domain struct with the token name as /// a signing domain and token contract as a verifying contract. /// Used to construct EIP2612 signature provided to `permit` /// function. /* solhint-disable-next-line func-name-mixedcase */ function DOMAIN_SEPARATOR() external view returns (bytes32); /// @notice Returns the current nonce for EIP2612 permission for the /// provided token owner for a replay protection. Used to construct /// EIP2612 signature provided to `permit` function. function nonces(address owner) external view returns (uint256); /// @notice Returns EIP2612 Permit message hash. Used to construct EIP2612 /// signature provided to `permit` function. /* solhint-disable-next-line func-name-mixedcase */ function PERMIT_TYPEHASH() external pure returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice An interface that should be implemented by contracts supporting /// `approveAndCall`/`receiveApproval` pattern. interface IReceiveApproval { /// @notice Receives approval to spend tokens. Called as a result of /// `approveAndCall` call on the token. function receiveApproval( address from, uint256 amount, address token, bytes calldata extraData ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice An interface that should be implemented by tokens supporting /// `approveAndCall`/`receiveApproval` pattern. interface IApproveAndCall { /// @notice Executes `receiveApproval` function on spender as specified in /// `IReceiveApproval` interface. Approves spender to withdraw from /// the caller multiple times, up to the `amount`. If this /// function is called again, it overwrites the current allowance /// with `amount`. Reverts if the approval reverted or if /// `receiveApproval` call on the spender reverted. function approveAndCall( address spender, uint256 amount, bytes memory extraData ) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; 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"); (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"); (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"); (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"); (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 assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"name":"approveAndCall","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"cachedChainId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"cachedDomainSeparator","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC721","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"recoverERC721","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.