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Latest 9 from a total of 9 transactions
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Create Token | 10639636 | 12 hrs ago | IN | 0 S | 0.05225636 | ||||
Create Token | 10634038 | 12 hrs ago | IN | 0 S | 0.04447343 | ||||
Create Token | 10630116 | 13 hrs ago | IN | 0 S | 0.04802929 | ||||
Create Token | 10621740 | 14 hrs ago | IN | 0 S | 0.04963161 | ||||
Create Token | 10615899 | 14 hrs ago | IN | 0 S | 0.04843839 | ||||
Create Token | 10615212 | 15 hrs ago | IN | 0 S | 0.04963233 | ||||
Create Token | 10610914 | 15 hrs ago | IN | 0 S | 0.04546114 | ||||
Create Token | 10606794 | 15 hrs ago | IN | 0 S | 0.05317362 | ||||
Create Token | 10602748 | 16 hrs ago | IN | 0 S | 0.06670735 |
Latest 9 internal transactions
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10639636 | 12 hrs ago | Contract Creation | 0 S | |||
10634038 | 12 hrs ago | Contract Creation | 0 S | |||
10630116 | 13 hrs ago | Contract Creation | 0 S | |||
10621740 | 14 hrs ago | Contract Creation | 0 S | |||
10615899 | 14 hrs ago | Contract Creation | 0 S | |||
10615212 | 15 hrs ago | Contract Creation | 0 S | |||
10610914 | 15 hrs ago | Contract Creation | 0 S | |||
10606794 | 15 hrs ago | Contract Creation | 0 S | |||
10602748 | 16 hrs ago | Contract Creation | 0 S |
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Contract Source Code Verified (Exact Match)
Contract Name:
TokenFactoryV3
Compiler Version
v0.8.28+commit.7893614a
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.28; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; // Arquivo TokenBase.sol abstract contract TokenBase is ERC20, Ownable { struct TokenMetadata { string tokenURI; string description; string website; string twitter; string telegram; } TokenMetadata internal metadata; uint8 internal immutable decimalsValue; mapping(address => bool) internal frozen; constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) ERC20(name, symbol) Ownable(msg.sender) { transferOwnership(creator); metadata = meta; decimalsValue = decimals_; _mint(creator, supply); // Se solicitado, renuncia imediatamente à propriedade if (renounceOwnership_) { _transferOwnership(address(0)); } } function decimals() public view override returns (uint8) { return decimalsValue; } function tokenURI() public view returns (string memory) { return metadata.tokenURI; } function description() public view returns (string memory) { return metadata.description; } function website() public view returns (string memory) { return metadata.website; } function twitter() public view returns (string memory) { return metadata.twitter; } function telegram() public view returns (string memory) { return metadata.telegram; } function _update(address from, address to, uint256 value) internal virtual override { if(from != address(0)) { require(!frozen[from], "Account is frozen"); } super._update(from, to, value); } } // Arquivo TokenFactory1.sol contract TokenFactory1 is Ownable { struct TokenPermissions { bool canMint; bool canFreeze; bool canUpdateMetadata; bool renounceOwnership; } event TokenCreated( address indexed tokenAddress, string name, string symbol, uint256 totalSupply, address creator ); // Token sem permissões especiais function createBasicToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { BasicToken token = new BasicToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } // Token com apenas Mint function createMintToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { MintToken token = new MintToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } // Token com apenas Freeze function createFreezeToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { FreezeToken token = new FreezeToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } // Token com apenas Update function createUpdateToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { UpdateToken token = new UpdateToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } constructor() Ownable(msg.sender) {} } // Arquivo TokenFactory2.sol contract TokenFactory2 is Ownable { struct TokenPermissions { bool canMint; bool canFreeze; bool canUpdateMetadata; bool renounceOwnership; } event TokenCreated( address indexed tokenAddress, string name, string symbol, uint256 totalSupply, address creator ); // Token com Mint e Freeze function createMintFreezeToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { MintFreezeToken token = new MintFreezeToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } // Token com Mint e Update function createMintUpdateToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { MintUpdateToken token = new MintUpdateToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } // Token com Freeze e Update function createFreezeUpdateToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { FreezeUpdateToken token = new FreezeUpdateToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } // Token com todas as permissões function createFullToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, bool renounceOwnership_ ) external returns (address) { FullToken token = new FullToken( name, symbol, initialSupply, decimals_, msg.sender, metadata, renounceOwnership_ ); emit TokenCreated( address(token), name, symbol, initialSupply, msg.sender ); return address(token); } constructor() Ownable(msg.sender) {} } // Arquivo TokenFactoryV3.sol contract TokenFactoryV3 is Ownable { address public immutable factory1; address public immutable factory2; struct TokenPermissions { bool canMint; bool canFreeze; bool canUpdateMetadata; bool renounceOwnership; } event TokenCreated( address indexed tokenAddress, string name, string symbol, uint256 totalSupply, address creator, bool canMint, bool canFreeze, bool canUpdateMetadata, bool ownershipRenounced ); constructor(address _factory1, address _factory2) Ownable(msg.sender) { factory1 = _factory1; factory2 = _factory2; } function createToken( string memory name, string memory symbol, uint256 initialSupply, uint8 decimals_, TokenBase.TokenMetadata memory metadata, TokenPermissions memory permissions ) external returns (address) { address tokenAddress; bool success; bytes memory returnData; if (permissions.canMint && permissions.canFreeze && permissions.canUpdateMetadata) { (success, returnData) = factory2.delegatecall( abi.encodeWithSignature( "createFullToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } else if (permissions.canMint && permissions.canFreeze) { (success, returnData) = factory2.delegatecall( abi.encodeWithSignature( "createMintFreezeToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } else if (permissions.canMint && permissions.canUpdateMetadata) { (success, returnData) = factory2.delegatecall( abi.encodeWithSignature( "createMintUpdateToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } else if (permissions.canFreeze && permissions.canUpdateMetadata) { (success, returnData) = factory2.delegatecall( abi.encodeWithSignature( "createFreezeUpdateToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } else if (permissions.canMint) { (success, returnData) = factory1.delegatecall( abi.encodeWithSignature( "createMintToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } else if (permissions.canFreeze) { (success, returnData) = factory1.delegatecall( abi.encodeWithSignature( "createFreezeToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } else if (permissions.canUpdateMetadata) { (success, returnData) = factory1.delegatecall( abi.encodeWithSignature( "createUpdateToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } else { (success, returnData) = factory1.delegatecall( abi.encodeWithSignature( "createBasicToken(string,string,uint256,uint8,(string,string,string,string,string),bool)", name, symbol, initialSupply, decimals_, metadata, permissions.renounceOwnership ) ); require(success, "Token creation failed"); tokenAddress = abi.decode(returnData, (address)); } emit TokenCreated( tokenAddress, name, symbol, initialSupply, msg.sender, permissions.canMint, permissions.canFreeze, permissions.canUpdateMetadata, permissions.renounceOwnership ); return tokenAddress; } } // Token sem permissões especiais contract BasicToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function permissions() public pure returns (bool, bool, bool) { return (false, false, false); } } // Token com apenas Mint contract MintToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function mint(address to, uint256 amount) external onlyOwner { _mint(to, amount); } function permissions() public pure returns (bool, bool, bool) { return (true, false, false); } } // Token com apenas Freeze contract FreezeToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function freezeAccount(address account, bool freeze) external onlyOwner { frozen[account] = freeze; } function isFrozen(address account) external view returns (bool) { return frozen[account]; } function permissions() public pure returns (bool, bool, bool) { return (false, true, false); } } // Token com apenas Update contract UpdateToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function updateMetadata( string memory tokenURI_, string memory description_, string memory website_, string memory twitter_, string memory telegram_ ) external onlyOwner { metadata.tokenURI = tokenURI_; metadata.description = description_; metadata.website = website_; metadata.twitter = twitter_; metadata.telegram = telegram_; } function permissions() public pure returns (bool, bool, bool) { return (false, false, true); } } // Token com Mint e Freeze contract MintFreezeToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function mint(address to, uint256 amount) external onlyOwner { _mint(to, amount); } function freezeAccount(address account, bool freeze) external onlyOwner { frozen[account] = freeze; } function isFrozen(address account) external view returns (bool) { return frozen[account]; } function permissions() public pure returns (bool, bool, bool) { return (true, true, false); } } // Token com Mint e Update contract MintUpdateToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function mint(address to, uint256 amount) external onlyOwner { _mint(to, amount); } function updateMetadata( string memory tokenURI_, string memory description_, string memory website_, string memory twitter_, string memory telegram_ ) external onlyOwner { metadata.tokenURI = tokenURI_; metadata.description = description_; metadata.website = website_; metadata.twitter = twitter_; metadata.telegram = telegram_; } function permissions() public pure returns (bool, bool, bool) { return (true, false, true); } } // Token com Freeze e Update contract FreezeUpdateToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function freezeAccount(address account, bool freeze) external onlyOwner { frozen[account] = freeze; } function isFrozen(address account) external view returns (bool) { return frozen[account]; } function updateMetadata( string memory tokenURI_, string memory description_, string memory website_, string memory twitter_, string memory telegram_ ) external onlyOwner { metadata.tokenURI = tokenURI_; metadata.description = description_; metadata.website = website_; metadata.twitter = twitter_; metadata.telegram = telegram_; } function permissions() public pure returns (bool, bool, bool) { return (false, true, true); } } // Token com todas as permissões contract FullToken is TokenBase { constructor( string memory name, string memory symbol, uint256 supply, uint8 decimals_, address creator, TokenMetadata memory meta, bool renounceOwnership_ ) TokenBase(name, symbol, supply, decimals_, creator, meta, renounceOwnership_) {} function mint(address to, uint256 amount) external onlyOwner { _mint(to, amount); } function freezeAccount(address account, bool freeze) external onlyOwner { frozen[account] = freeze; } function isFrozen(address account) external view returns (bool) { return frozen[account]; } function updateMetadata( string memory tokenURI_, string memory description_, string memory website_, string memory twitter_, string memory telegram_ ) external onlyOwner { metadata.tokenURI = tokenURI_; metadata.description = description_; metadata.website = website_; metadata.twitter = twitter_; metadata.telegram = telegram_; } function permissions() public pure returns (bool, bool, bool) { return (true, true, true); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {Context} from "../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. * * The initial owner is set to the address provided by the deployer. 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; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(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 { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol) pragma solidity ^0.8.20; /** * @dev Standard ERC-20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens. */ interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender); } /** * @dev Standard ERC-721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens. */ interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator); } /** * @dev Standard ERC-1155 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens. */ interface IERC1155Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. * @param tokenId Identifier number of a token. */ error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC1155InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC1155InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param owner Address of the current owner of a token. */ error ERC1155MissingApprovalForAll(address operator, address owner); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC1155InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC1155InvalidOperator(address operator); /** * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation. * Used in batch transfers. * @param idsLength Length of the array of token identifiers * @param valuesLength Length of the array of token amounts */ error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.2.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "./IERC20.sol"; import {IERC20Metadata} from "./extensions/IERC20Metadata.sol"; import {Context} from "../../utils/Context.sol"; import {IERC20Errors} from "../../interfaces/draft-IERC6093.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}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC-20 * applications. */ abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors { mapping(address account => uint256) private _balances; mapping(address account => mapping(address spender => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @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 default value returned by this function, unless * it's overridden. * * 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 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `value`. */ function transfer(address to, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _transfer(owner, to, value); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, value); return true; } /** * @dev See {IERC20-transferFrom}. * * Skips emitting an {Approval} event indicating an allowance update. This is not * required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve]. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `value`. * - the caller must have allowance for ``from``'s tokens of at least * `value`. */ function transferFrom(address from, address to, uint256 value) public virtual returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, value); _transfer(from, to, value); return true; } /** * @dev Moves a `value` amount of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _transfer(address from, address to, uint256 value) internal { if (from == address(0)) { revert ERC20InvalidSender(address(0)); } if (to == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(from, to, value); } /** * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from` * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding * this function. * * Emits a {Transfer} event. */ function _update(address from, address to, uint256 value) internal virtual { if (from == address(0)) { // Overflow check required: The rest of the code assumes that totalSupply never overflows _totalSupply += value; } else { uint256 fromBalance = _balances[from]; if (fromBalance < value) { revert ERC20InsufficientBalance(from, fromBalance, value); } unchecked { // Overflow not possible: value <= fromBalance <= totalSupply. _balances[from] = fromBalance - value; } } if (to == address(0)) { unchecked { // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply. _totalSupply -= value; } } else { unchecked { // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256. _balances[to] += value; } } emit Transfer(from, to, value); } /** * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0). * Relies on the `_update` mechanism * * Emits a {Transfer} event with `from` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _mint(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(address(0), account, value); } /** * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply. * Relies on the `_update` mechanism. * * Emits a {Transfer} event with `to` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead */ function _burn(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidSender(address(0)); } _update(account, address(0), value); } /** * @dev Sets `value` 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. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address owner, address spender, uint256 value) internal { _approve(owner, spender, value, true); } /** * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event. * * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any * `Approval` event during `transferFrom` operations. * * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to * true using the following override: * * ```solidity * function _approve(address owner, address spender, uint256 value, bool) internal virtual override { * super._approve(owner, spender, value, true); * } * ``` * * Requirements are the same as {_approve}. */ function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual { if (owner == address(0)) { revert ERC20InvalidApprover(address(0)); } if (spender == address(0)) { revert ERC20InvalidSpender(address(0)); } _allowances[owner][spender] = value; if (emitEvent) { emit Approval(owner, spender, value); } } /** * @dev Updates `owner` s allowance for `spender` based on spent `value`. * * Does not update the allowance value in case of infinite allowance. * Revert if not enough allowance is available. * * Does not emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 value) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance < type(uint256).max) { if (currentAllowance < value) { revert ERC20InsufficientAllowance(spender, currentAllowance, value); } unchecked { _approve(owner, spender, currentAllowance - value, false); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC-20 standard. */ 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 // OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC-20 standard as defined in the ERC. */ interface IERC20 { /** * @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); /** * @dev Returns the value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 value) 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 a `value` amount of tokens 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 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "paris", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000eaad92783d4734b86f4a3857d4933a6a05af7cb3000000000000000000000000011e1997635e942297cfe9d975d423778995bb19
-----Decoded View---------------
Arg [0] : _factory1 (address): 0xEaAd92783d4734b86F4A3857D4933a6A05AF7cb3
Arg [1] : _factory2 (address): 0x011E1997635E942297CFE9D975D423778995bb19
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000eaad92783d4734b86f4a3857d4933a6a05af7cb3
Arg [1] : 000000000000000000000000011e1997635e942297cfe9d975d423778995bb19
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Multichain Portfolio | 31 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.