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Latest 25 from a total of 249 transactions
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Buy Tokens | 17971316 | 339 days ago | IN | 0 ETH | 0.00593914 | ||||
Buy Tokens | 17971314 | 339 days ago | IN | 0 ETH | 0.00613515 | ||||
Buy Tokens | 17971254 | 339 days ago | IN | 0 ETH | 0.00557521 | ||||
Buy Tokens | 17971231 | 339 days ago | IN | 0 ETH | 0.00621168 | ||||
Buy Tokens | 17971151 | 339 days ago | IN | 0 ETH | 0.00874023 | ||||
Buy Tokens | 17971110 | 339 days ago | IN | 0 ETH | 0.00867334 | ||||
Buy Tokens | 17971109 | 339 days ago | IN | 0 ETH | 0.00909045 | ||||
Buy Tokens | 17971106 | 339 days ago | IN | 0 ETH | 0.00987354 | ||||
Buy Tokens | 17971105 | 339 days ago | IN | 0 ETH | 0.0084889 | ||||
Buy Tokens | 17971099 | 339 days ago | IN | 0 ETH | 0.01007708 | ||||
Buy Tokens | 17971043 | 339 days ago | IN | 0 ETH | 0.01019549 | ||||
Buy Tokens | 17971024 | 339 days ago | IN | 0 ETH | 0.01134826 | ||||
Buy Tokens | 17970903 | 339 days ago | IN | 0 ETH | 0.01341238 | ||||
Buy Tokens | 17970893 | 339 days ago | IN | 0 ETH | 0.01347574 | ||||
Buy Tokens | 17970660 | 339 days ago | IN | 0 ETH | 0.00615546 | ||||
Buy Tokens | 17970655 | 339 days ago | IN | 0 ETH | 0.00625236 | ||||
Buy Tokens | 17970645 | 339 days ago | IN | 0 ETH | 0.00556703 | ||||
Buy Tokens | 17970575 | 339 days ago | IN | 0 ETH | 0.00600266 | ||||
Buy Tokens | 17970532 | 339 days ago | IN | 0 ETH | 0.00494444 | ||||
Buy Tokens | 17970472 | 339 days ago | IN | 0 ETH | 0.00547117 | ||||
Buy Tokens | 17970301 | 339 days ago | IN | 0 ETH | 0.00329295 | ||||
Buy Tokens | 17969881 | 339 days ago | IN | 0 ETH | 0.00182156 | ||||
Buy Tokens | 17969700 | 339 days ago | IN | 0 ETH | 0.00260707 | ||||
Buy Tokens | 17969687 | 339 days ago | IN | 0 ETH | 0.00235584 | ||||
Buy Tokens | 17969355 | 340 days ago | IN | 0 ETH | 0.00241601 |
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Contract Name:
SHIATokenCrowdsale
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 "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "./Crowdsale.sol"; import "./AllowanceCrowdsale.sol"; import "./TimedCrowdsale.sol"; contract SHIATokenCrowdsale is AllowanceCrowdsale, TimedCrowdsale { constructor( uint256 _rate, address payable _wallet, ERC20 _token, ERC20 _usdt, address _tokenWallet, uint256 _openingTime, uint256 _closingTime, uint256 maxInvestment, uint256 minInvestment ) Crowdsale(_rate, _wallet, _token, _usdt, maxInvestment, minInvestment) AllowanceCrowdsale(_tokenWallet) TimedCrowdsale(_openingTime, _closingTime) {} /** * @dev Extend parent behavior requiring to be within contributing period. * @param beneficiary Token purchaser * @param weiAmount Amount of wei contributed */ function _preValidatePurchase(address beneficiary, uint256 weiAmount) internal view override(Crowdsale, TimedCrowdsale) onlyWhileOpen { super._preValidatePurchase(beneficiary, weiAmount); } /** * @dev Overrides parent behavior by transferring tokens from wallet. * @param beneficiary Token purchaser * @param tokenAmount Amount of tokens purchased */ function _deliverTokens(address beneficiary, uint256 tokenAmount) internal override(Crowdsale, AllowanceCrowdsale) { super._deliverTokens(beneficiary, tokenAmount); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "./Crowdsale.sol"; /** * @title TimedCrowdsale * @dev Borrow from https://github.dev/OpenZeppelin/openzeppelin-contracts/blob/docs-v2.x/contracts/crowdsale/validation/TimedCrowdsale.sol * @dev Crowdsale accepting contributions only within a time frame. */ abstract contract TimedCrowdsale is Crowdsale { uint256 public _openingTime; uint256 public _closingTime; /** * Event for crowdsale extending * @param newClosingTime new closing time * @param prevClosingTime old closing time */ event TimedCrowdsaleExtended( uint256 prevClosingTime, uint256 newClosingTime ); /** * @dev Reverts if not in crowdsale time range. */ modifier onlyWhileOpen() { require(isOpen(), "TimedCrowdsale: not open"); _; } /** * @dev Constructor, takes crowdsale opening and closing times. * @param openingTime Crowdsale opening time * @param closingTime Crowdsale closing time */ constructor(uint256 openingTime, uint256 closingTime) { // solhint-disable-next-line not-rely-on-time require( openingTime >= block.timestamp, "TimedCrowdsale: opening time is before current time" ); // solhint-disable-next-line max-line-length require( closingTime > openingTime, "TimedCrowdsale: opening time is not before closing time" ); _openingTime = openingTime; _closingTime = closingTime; } /** * @return true if the crowdsale is open, false otherwise. */ function isOpen() public view returns (bool) { // solhint-disable-next-line not-rely-on-time return block.timestamp >= _openingTime && block.timestamp <= _closingTime; } /** * @dev Checks whether the period in which the crowdsale is open has already elapsed. * @return Whether crowdsale period has elapsed */ function hasClosed() public view returns (bool) { // solhint-disable-next-line not-rely-on-time return block.timestamp > _closingTime; } /** * @dev Extend parent behavior requiring to be within contributing period. * @param beneficiary Token purchaser * @param weiAmount Amount of wei contributed */ function _preValidatePurchase(address beneficiary, uint256 weiAmount) internal view virtual override onlyWhileOpen { super._preValidatePurchase(beneficiary, weiAmount); } /** * @dev Extend crowdsale. * @param newClosingTime Crowdsale closing time */ function _extendTime(uint256 newClosingTime) internal { require(!hasClosed(), "TimedCrowdsale: already closed"); // solhint-disable-next-line max-line-length require( newClosingTime > _closingTime, "TimedCrowdsale: new closing time is before current closing time" ); emit TimedCrowdsaleExtended(_closingTime, newClosingTime); _closingTime = newClosingTime; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/math/Math.sol"; import "./Crowdsale.sol"; /** * @title AllowanceCrowdsale * @dev Borrow from https://github.dev/OpenZeppelin/openzeppelin-contracts/blob/docs-v2.x/contracts/crowdsale/emission/AllowanceCrowdsale.sol * @dev Extension of Crowdsale where tokens are held by a wallet, which approves an allowance to the crowdsale. */ abstract contract AllowanceCrowdsale is Crowdsale { using SafeERC20 for IERC20; address public _tokenWallet; /** * @dev Constructor, takes token wallet address. * @param tokenWallet Address holding the tokens, which has approved allowance to the crowdsale. */ constructor(address tokenWallet) { require( tokenWallet != address(0), "AllowanceCrowdsale: token wallet is the zero address" ); _tokenWallet = tokenWallet; } /** * @dev Checks the amount of tokens left in the allowance. * @return Amount of tokens left in the allowance */ function remainingTokens() public view returns (uint256) { return Math.min( _token.balanceOf(_tokenWallet), _token.allowance(_tokenWallet, address(this)) ); } /** * @dev Overrides parent behavior by transferring tokens from wallet. * @param beneficiary Token purchaser * @param tokenAmount Amount of tokens purchased */ function _deliverTokens(address beneficiary, uint256 tokenAmount) internal virtual override { _token.safeTransferFrom(_tokenWallet, beneficiary, tokenAmount); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; /** * @title Crowdsale * @dev Borrow from https://github.dev/OpenZeppelin/openzeppelin-contracts/blob/docs-v2.x/contracts/crowdsale/Crowdsale.ol and upgrade to solidity v0.8.0 * @dev Crowdsale is a base contract for managing a token crowdsale, * allowing investors to purchase tokens with ether. This contract implements * such functionality in its most fundamental form and can be extended to provide additional * functionality and/or custom behavior. * The external interface represents the basic interface for purchasing tokens, and conforms * the base architecture for crowdsales. It is *not* intended to be modified / overridden. * The internal interface conforms the extensible and modifiable surface of crowdsales. Override * the methods to add functionality. Consider using 'super' where appropriate to concatenate * behavior. */ contract Crowdsale is Context, Ownable, ReentrancyGuard { using SafeERC20 for IERC20; // The token being sold IERC20 public _token; // The token used to pruchase IERC20 public _usdt; // Maximum investment per investor (in USDT) uint256 public _maxInvestment; // Minimum investment per investor (in USDT) uint256 public _minInvestment; // Address where funds are collected address payable public _wallet; // How many token units a buyer gets per wei. // The rate is the conversion between wei and the smallest and indivisible token unit. // So, if you are using a rate of 1 with a ERC20Detailed token with 3 decimals called TOK // 1 wei will give you 1 unit, or 0.001 TOK. uint256 public _rate; // Amount of wei raised uint256 public _weiRaised; /** * Event for token purchase logging * @param purchaser who paid for the tokens * @param beneficiary who got the tokens * @param value weis paid for purchase * @param amount amount of tokens purchased */ event TokensPurchased( address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount ); /** * @param rate Number of token units a buyer gets per wei * @dev The rate is the conversion between wei and the smallest and indivisible * token unit. So, if you are using a rate of 1 with a ERC20Detailed token * with 3 decimals called TOK, 1 wei will give you 1 unit, or 0.001 TOK. * @param wallet Address where collected funds will be forwarded to * @param token Address of the token being sold */ constructor( uint256 rate, address payable wallet, IERC20 token, IERC20 usdt, uint256 maxInvestment, uint256 minInvestment ) { require(rate > 0, "Crowdsale: rate is 0"); require(wallet != address(0), "Crowdsale: wallet is the zero address"); require( address(token) != address(0), "Crowdsale: token is the zero address" ); require(maxInvestment > 0, "SHIACrowdsale: max investment is 0"); require(minInvestment > 0, "SHIACrowdsale: min investment is 0"); _rate = rate; _wallet = wallet; _token = token; _usdt = usdt; _maxInvestment = maxInvestment; _minInvestment = minInvestment; } /** * @dev fallback function ***DO NOT OVERRIDE*** * Note that other contracts will transfer funds with a base gas stipend * of 2300, which is not enough to call buyTokens. Consider calling * buyTokens directly when purchasing tokens from a contract. */ // receive() external payable { // buyTokens(_msgSender()); // } /** * @dev This function updates the minimum investment * This function has a non-reentrancy guard, so it shouldn't be called by * another `nonReentrant` function. * @param newMaxInvestment new max investment required */ function updateMaximumInvestment(uint256 newMaxInvestment) public onlyOwner nonReentrant { // update rate _maxInvestment = newMaxInvestment; } /** * @dev This function updates the minimum investment * This function has a non-reentrancy guard, so it shouldn't be called by * another `nonReentrant` function. * @param newMinInvesetment new minimum investment required */ function updateMinimumInvestment(uint256 newMinInvesetment) public onlyOwner nonReentrant { // update rate _minInvestment = newMinInvesetment; } /** * @dev This function chnages the reciepient walet * This function has a non-reentrancy guard, so it shouldn't be called by * another `nonReentrant` function. * @param newWallet New wallet */ function updateWallet(address payable newWallet) public onlyOwner nonReentrant { // update rate _wallet = newWallet; } /** * @dev This function chnages the rate * This function has a non-reentrancy guard, so it shouldn't be called by * another `nonReentrant` function. * @param newRate Value in usdt involved in the purchase */ function updateRate(uint256 newRate) public onlyOwner nonReentrant { // update rate _rate = newRate; } /** * @dev low level token purchase ***DO NOT OVERRIDE*** * This function has a non-reentrancy guard, so it shouldn't be called by * another `nonReentrant` function. * @param beneficiary Recipient of the token purchase * @param usdtAmount Value in usdt involved in the purchase */ function buyTokens(address beneficiary, uint256 usdtAmount) public nonReentrant { _preValidatePurchase(beneficiary, usdtAmount); // calculate token amount to be created uint256 tokenAmount = _getTokenAmount(usdtAmount); // update state _weiRaised = _weiRaised + usdtAmount; _processPurchase(beneficiary, tokenAmount); emit TokensPurchased(_msgSender(), beneficiary, usdtAmount, tokenAmount); _updatePurchasingState(beneficiary, usdtAmount); _forwardFunds(usdtAmount); _postValidatePurchase(beneficiary, usdtAmount); } /** * @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. * Use `super` in contracts that inherit from Crowdsale to extend their validations. * Example from CappedCrowdsale.sol's _preValidatePurchase method: * super._preValidatePurchase(beneficiary, usdtAmount); * require(weiRaised().add(usdtAmount) <= cap); * @param beneficiary Address performing the token purchase * @param usdtAmount Value in wei involved in the purchase */ function _preValidatePurchase(address beneficiary, uint256 usdtAmount) internal view virtual { require( beneficiary != address(0), "Crowdsale: beneficiary is the zero address" ); require(usdtAmount != 0, "Crowdsale: usdtAmount is 0"); require(usdtAmount >= _minInvestment, "SHIACrowdsale: investment amount is less than minimum"); require(usdtAmount <= _maxInvestment, "SHIACrowdsale: investment amount is greater than maximum"); this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 } /** * @dev Validation of an executed purchase. Observe state and use revert statements to undo rollback when valid * conditions are not met. * @param beneficiary Address performing the token purchase * @param usdtAmount Value in wei involved in the purchase */ function _postValidatePurchase(address beneficiary, uint256 usdtAmount) internal view { // solhint-disable-previous-line no-empty-blocks } /** * @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends * its tokens. * @param beneficiary Address performing the token purchase * @param tokenAmount Number of tokens to be emitted */ function _deliverTokens(address beneficiary, uint256 tokenAmount) internal virtual { _token.safeTransfer(beneficiary, tokenAmount); } /** * @dev Executed when a purchase has been validated and is ready to be executed. Doesn't necessarily emit/send * tokens. * @param beneficiary Address receiving the tokens * @param tokenAmount Number of tokens to be purchased */ function _processPurchase(address beneficiary, uint256 tokenAmount) internal { _deliverTokens(beneficiary, tokenAmount); } /** * @dev Override for extensions that require an internal state to check for validity (current user contributions, * etc.) * @param beneficiary Address receiving the tokens * @param usdtAmount Value in wei involved in the purchase */ function _updatePurchasingState(address beneficiary, uint256 usdtAmount) internal { // solhint-disable-previous-line no-empty-blocks } /** * @dev Override to extend the way in which ether is converted to tokens. * @param usdtAmount Value in usdt to be converted into tokens * @return Number of tokens that can be purchased with the specified _weiAmount */ function _getTokenAmount(uint256 usdtAmount) internal view returns (uint256) { return usdtAmount * _rate; } /** * @dev Determines how ETH is stored/forwarded on purchases. */ function _forwardFunds(uint256 usdtAmount) internal { // conver usdtAmount to kwei because usdt is 6 decimals uint256 kweiAmount = usdtAmount / 10 ** 12; require(_wallet != address(0), "SHIACrowdsale: wallet is the zero address"); require(_usdt.balanceOf(msg.sender) >= kweiAmount, "SHIACrowdsale: insufficient USDT balance"); SafeERC20.safeTransferFrom(_usdt, msg.sender, _wallet, kweiAmount); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.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}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The defaut value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * 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 override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override 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 value {ERC20} uses, unless this function is * 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 override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * 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) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); _approve(sender, _msgSender(), currentAllowance - amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); _approve(_msgSender(), spender, currentAllowance - subtractedValue); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); _balances[sender] = senderBalance - amount; _balances[recipient] += amount; emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); _balances[account] = accountBalance - amount; _totalSupply -= amount; emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` 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. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @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. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } }
// 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 () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), 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 { emit OwnershipTransferred(_owner, address(0)); _owner = 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"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// 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' // solhint-disable-next-line max-line-length 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 // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// 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; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// 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) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } }
// 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 ^0.8.0; /** * @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; // solhint-disable-next-line no-inline-assembly 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"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (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"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (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 // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _rate (uint256): 25
Arg [1] : _wallet (address): 0xB93545b5bd508A29FDEd676cB80c395fa05D347a
Arg [2] : _token (address): 0x2Da32d5c8c6F6B58Ed0A16eeb163cE92E7687Acd
Arg [3] : _usdt (address): 0xdAC17F958D2ee523a2206206994597C13D831ec7
Arg [4] : _tokenWallet (address): 0x81690e382D85f86E6C1c678d7e248265d5E24E04
Arg [5] : _openingTime (uint256): 1682472330
Arg [6] : _closingTime (uint256): 1735175642
Arg [7] : maxInvestment (uint256): 300000000000000000000000
Arg [8] : minInvestment (uint256): 250000000000000000000
-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000019
Arg [1] : 000000000000000000000000b93545b5bd508a29fded676cb80c395fa05d347a
Arg [2] : 0000000000000000000000002da32d5c8c6f6b58ed0a16eeb163ce92e7687acd
Arg [3] : 000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec7
Arg [4] : 00000000000000000000000081690e382d85f86e6c1c678d7e248265d5e24e04
Arg [5] : 0000000000000000000000000000000000000000000000000000000064487d8a
Arg [6] : 00000000000000000000000000000000000000000000000000000000676cadda
Arg [7] : 000000000000000000000000000000000000000000003f870857a3e0e3800000
Arg [8] : 00000000000000000000000000000000000000000000000d8d726b7177a80000
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.