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0xba59276201342cc634896ddabfdb9b7abcbf126f375064c6d5aede9c82eb1042 | Approve | (pending) | 8 days ago | IN | 0 ETH | (Pending) | |||
Approve | 21457384 | 31 hrs ago | IN | 0 ETH | 0.00024974 | ||||
Transfer | 21442185 | 3 days ago | IN | 0 ETH | 0.00044376 | ||||
Approve | 21429346 | 5 days ago | IN | 0 ETH | 0.0004383 | ||||
Approve | 21427305 | 5 days ago | IN | 0 ETH | 0.00024365 | ||||
Approve | 21420916 | 6 days ago | IN | 0 ETH | 0.00021135 | ||||
Approve | 21417150 | 6 days ago | IN | 0 ETH | 0.0017236 | ||||
Approve | 21412064 | 7 days ago | IN | 0 ETH | 0.00032014 | ||||
Approve | 21403954 | 8 days ago | IN | 0 ETH | 0.00020662 | ||||
Approve | 21385646 | 11 days ago | IN | 0 ETH | 0.00081959 | ||||
Approve | 21384575 | 11 days ago | IN | 0 ETH | 0.00035268 | ||||
Approve | 21373279 | 13 days ago | IN | 0 ETH | 0.00154732 | ||||
Approve | 21365354 | 14 days ago | IN | 0 ETH | 0.00094512 | ||||
Approve | 21364233 | 14 days ago | IN | 0 ETH | 0.00029212 | ||||
Approve | 21355367 | 15 days ago | IN | 0 ETH | 0.0002213 | ||||
Approve | 21355038 | 15 days ago | IN | 0 ETH | 0.00026732 | ||||
Transfer | 21354087 | 15 days ago | IN | 0 ETH | 0.00058819 | ||||
Transfer | 21348440 | 16 days ago | IN | 0 ETH | 0.00054437 | ||||
Transfer | 21346694 | 16 days ago | IN | 0 ETH | 0.00057373 | ||||
Transfer | 21340173 | 17 days ago | IN | 0 ETH | 0.00108385 | ||||
Approve | 21336053 | 18 days ago | IN | 0 ETH | 0.00047027 | ||||
Approve | 21334558 | 18 days ago | IN | 0 ETH | 0.00044302 | ||||
Approve | 21334490 | 18 days ago | IN | 0 ETH | 0.00048778 | ||||
Approve | 21324475 | 19 days ago | IN | 0 ETH | 0.00139671 | ||||
Transfer | 21321044 | 20 days ago | IN | 0 ETH | 0.00142033 |
Latest 25 internal transactions (View All)
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17382941 | 571 days ago | 0.004 ETH | ||||
17382941 | 571 days ago | 0.002 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH | ||||
17382941 | 571 days ago | 0.0005 ETH |
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Contract Name:
Inscription
Compiler Version
v0.8.18+commit.87f61d96
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "./Logarithm.sol"; import "./TransferHelper.sol"; // This is common token interface, get balance of owner's token by ERC20/ERC721/ERC1155. interface ICommonToken { function balanceOf(address owner) external returns(uint256); } // This contract is extended from ERC20 contract Inscription is ERC20 { using Logarithm for int256; uint256 public cap; // Max amount uint256 public limitPerMint; // Limitaion of each mint uint256 public inscriptionId; // Inscription Id uint256 public maxMintSize; // max mint size, that means the max mint quantity is: maxMintSize * limitPerMint uint256 public freezeTime; // The frozen time (interval) between two mints is a fixed number of seconds. You can mint, but you will need to pay an additional mint fee, and this fee will be double for each mint. address public onlyContractAddress; // Only addresses that hold these assets can mint uint256 public onlyMinQuantity; // Only addresses that the quantity of assets hold more than this amount can mint uint256 public baseFee; // base fee of the second mint after frozen interval. The first mint after frozen time is free. uint256 public fundingCommission; // commission rate of fund raising, 100 means 1% uint256 public crowdFundingRate; // rate of crowdfunding address payable public crowdfundingAddress; // receiving fee of crowdfunding address payable public inscriptionFactory; mapping(address => uint256) public lastMintTimestamp; // record the last mint timestamp of account mapping(address => uint256) public lastMintFee; // record the last mint fee constructor( string memory _name, // token name string memory _tick, // token tick, same as symbol. must be 4 characters. uint256 _cap, // Max amount uint256 _limitPerMint, // Limitaion of each mint uint256 _inscriptionId, // Inscription Id uint256 _maxMintSize, // max mint size, that means the max mint quantity is: maxMintSize * limitPerMint. This is only availabe for non-frozen time token. uint256 _freezeTime, // The frozen time (interval) between two mints is a fixed number of seconds. You can mint, but you will need to pay an additional mint fee, and this fee will be double for each mint. address _onlyContractAddress, // Only addresses that hold these assets can mint uint256 _onlyMinQuantity, // Only addresses that the quantity of assets hold more than this amount can mint uint256 _baseFee, // base fee of the second mint after frozen interval. The first mint after frozen time is free. uint256 _fundingCommission, // commission rate of fund raising, 100 means 1% uint256 _crowdFundingRate, // rate of crowdfunding address payable _crowdFundingAddress, // receiving fee of crowdfunding address payable _inscriptionFactory ) ERC20(_name, _tick) { require(_cap >= _limitPerMint, "Limit per mint exceed cap"); cap = _cap; limitPerMint = _limitPerMint; inscriptionId = _inscriptionId; maxMintSize = _maxMintSize; freezeTime = _freezeTime; onlyContractAddress = _onlyContractAddress; onlyMinQuantity = _onlyMinQuantity; baseFee = _baseFee; fundingCommission = _fundingCommission; crowdFundingRate = _crowdFundingRate; crowdfundingAddress = _crowdFundingAddress; inscriptionFactory = _inscriptionFactory; } function mint(address _to) payable public { // Check if the quantity after mint will exceed the cap require(totalSupply() + limitPerMint <= cap, "Touched cap"); // Check if the assets in the msg.sender is satisfied require(onlyContractAddress == address(0x0) || ICommonToken(onlyContractAddress).balanceOf(msg.sender) >= onlyMinQuantity, "You don't have required assets"); if(lastMintTimestamp[msg.sender] + freezeTime > block.timestamp) { // The min extra tip is double of last mint fee lastMintFee[msg.sender] = lastMintFee[msg.sender] == 0 ? baseFee : lastMintFee[msg.sender] * 2; // Transfer the fee to the crowdfunding address if(crowdFundingRate > 0) { // Check if the tip is high than the min extra fee require(msg.value >= crowdFundingRate + lastMintFee[msg.sender], "Send some ETH as fee and crowdfunding"); _dispatchFunding(crowdFundingRate); } // Transfer the tip to InscriptionFactory smart contract if(msg.value - crowdFundingRate > 0) TransferHelper.safeTransferETH(inscriptionFactory, msg.value - crowdFundingRate); } else { // Transfer the fee to the crowdfunding address if(crowdFundingRate > 0) { require(msg.value >= crowdFundingRate, "Send some ETH as crowdfunding"); _dispatchFunding(msg.value); } // Out of frozen time, free mint. Reset the timestamp and mint times. lastMintFee[msg.sender] = 0; lastMintTimestamp[msg.sender] = block.timestamp; } // Do mint _mint(_to, limitPerMint); } // batch mint is only available for non-frozen-time tokens function batchMint(address _to, uint256 _num) payable public { require(_num <= maxMintSize, "exceed max mint size"); require(totalSupply() + _num * limitPerMint <= cap, "Touch cap"); require(freezeTime == 0, "Batch mint only for non-frozen token"); require(onlyContractAddress == address(0x0) || ICommonToken(onlyContractAddress).balanceOf(msg.sender) >= onlyMinQuantity, "You don't have required assets"); if(crowdFundingRate > 0) { require(msg.value >= crowdFundingRate * _num, "Crowdfunding ETH not enough"); _dispatchFunding(msg.value); } for(uint256 i = 0; i < _num; i++) _mint(_to, limitPerMint); } function getMintFee(address _addr) public view returns(uint256 mintedTimes, uint256 nextMintFee) { if(lastMintTimestamp[_addr] + freezeTime > block.timestamp) { int256 scale = 1e18; int256 halfScale = 5e17; // times = log_2(lastMintFee / baseFee) + 1 (if lastMintFee > 0) nextMintFee = lastMintFee[_addr] == 0 ? baseFee : lastMintFee[_addr] * 2; mintedTimes = uint256((Logarithm.log2(int256(nextMintFee / baseFee) * scale, scale, halfScale) + 1) / scale) + 1; } } function _dispatchFunding(uint256 _amount) private { uint256 commission = _amount * fundingCommission / 10000; TransferHelper.safeTransferETH(crowdfundingAddress, _amount - commission); if(commission > 0) TransferHelper.safeTransferETH(inscriptionFactory, commission); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol) 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.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 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}. * * 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 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 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: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, 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}. * * NOTE: If `amount` 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 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, 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}. * * 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 `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, 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) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, 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) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `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. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer(address from, address to, uint256 amount) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, 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: * * - `account` 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; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(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"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(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 Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 amount) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - 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 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 {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) 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 // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ 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 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 `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) 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; library Logarithm { /// @notice Finds the zero-based index of the first one in the binary representation of x. /// @dev See the note on msb in the "Find First Set" Wikipedia article https://en.wikipedia.org/wiki/Find_first_set /// @param x The uint256 number for which to find the index of the most significant bit. /// @return msb The index of the most significant bit as an uint256. function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) { if (x >= 2**128) { x >>= 128; msb += 128; } if (x >= 2**64) { x >>= 64; msb += 64; } if (x >= 2**32) { x >>= 32; msb += 32; } if (x >= 2**16) { x >>= 16; msb += 16; } if (x >= 2**8) { x >>= 8; msb += 8; } if (x >= 2**4) { x >>= 4; msb += 4; } if (x >= 2**2) { x >>= 2; msb += 2; } if (x >= 2**1) { // No need to shift x any more. msb += 1; } } /// @notice Calculates the binary logarithm of x. /// /// @dev Based on the iterative approximation algorithm. /// https://en.wikipedia.org/wiki/Binary_logarithm#Iterative_approximation /// /// Requirements: /// - x must be greater than zero. /// /// Caveats: /// - The results are nor perfectly accurate to the last digit, due to the lossy precision of the iterative approximation. /// /// @param x The signed 59.18-decimal fixed-point number for which to calculate the binary logarithm. /// @return result The binary logarithm as a signed 59.18-decimal fixed-point number. function log2(int256 x, int256 scale, int256 halfScale) internal pure returns (int256 result) { require(x > 0); unchecked { // This works because log2(x) = -log2(1/x). int256 sign; if (x >= scale) { sign = 1; } else { sign = -1; // Do the fixed-point inversion inline to save gas. The numerator is SCALE * SCALE. assembly { x := div(1000000000000000000000000000000000000, x) } } // Calculate the integer part of the logarithm and add it to the result and finally calculate y = x * 2^(-n). uint256 n = mostSignificantBit(uint256(x / scale)); // The integer part of the logarithm as a signed 59.18-decimal fixed-point number. The operation can't overflow // because n is maximum 255, SCALE is 1e18 and sign is either 1 or -1. result = int256(n) * scale; // This is y = x * 2^(-n). int256 y = x >> n; // If y = 1, the fractional part is zero. if (y == scale) { return result * sign; } // Calculate the fractional part via the iterative approximation. // The "delta >>= 1" part is equivalent to "delta /= 2", but shifting bits is faster. for (int256 delta = int256(halfScale); delta > 0; delta >>= 1) { y = (y * y) / scale; // Is y^2 > 2 and so in the range [2,4)? if (y >= 2 * scale) { // Add the 2^(-m) factor to the logarithm. result += delta; // Corresponds to z/2 on Wikipedia. y >>= 1; } } result *= sign; } } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity >=0.6.0; // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } }
{ "viaIR": true, "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_tick","type":"string"},{"internalType":"uint256","name":"_cap","type":"uint256"},{"internalType":"uint256","name":"_limitPerMint","type":"uint256"},{"internalType":"uint256","name":"_inscriptionId","type":"uint256"},{"internalType":"uint256","name":"_maxMintSize","type":"uint256"},{"internalType":"uint256","name":"_freezeTime","type":"uint256"},{"internalType":"address","name":"_onlyContractAddress","type":"address"},{"internalType":"uint256","name":"_onlyMinQuantity","type":"uint256"},{"internalType":"uint256","name":"_baseFee","type":"uint256"},{"internalType":"uint256","name":"_fundingCommission","type":"uint256"},{"internalType":"uint256","name":"_crowdFundingRate","type":"uint256"},{"internalType":"address payable","name":"_crowdFundingAddress","type":"address"},{"internalType":"address payable","name":"_inscriptionFactory","type":"address"}],"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":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","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":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_num","type":"uint256"}],"name":"batchMint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"cap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"crowdFundingRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"crowdfundingAddress","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"freezeTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"fundingCommission","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"}],"name":"getMintFee","outputs":[{"internalType":"uint256","name":"mintedTimes","type":"uint256"},{"internalType":"uint256","name":"nextMintFee","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"inscriptionFactory","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"inscriptionId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastMintFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastMintTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"limitPerMint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxMintSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"onlyContractAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"onlyMinQuantity","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","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":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000000001c00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000084595161401484a00000000000000000000000000000000000000000000000000003635c9adc5dea00000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000258000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000e35fa931a00000000000000000000000000000000000000000000000000000000000000000640000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000047b9949041ebf2472332883e64025d5d024941c60000000000000000000000000000000000000000000000000000000000000009466169724552433230000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000046665726300000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _name (string): FairERC20
Arg [1] : _tick (string): ferc
Arg [2] : _cap (uint256): 10000000000000000000000000
Arg [3] : _limitPerMint (uint256): 1000000000000000000000
Arg [4] : _inscriptionId (uint256): 1
Arg [5] : _maxMintSize (uint256): 1
Arg [6] : _freezeTime (uint256): 600
Arg [7] : _onlyContractAddress (address): 0x0000000000000000000000000000000000000000
Arg [8] : _onlyMinQuantity (uint256): 0
Arg [9] : _baseFee (uint256): 250000000000000
Arg [10] : _fundingCommission (uint256): 100
Arg [11] : _crowdFundingRate (uint256): 0
Arg [12] : _crowdFundingAddress (address): 0x0000000000000000000000000000000000000000
Arg [13] : _inscriptionFactory (address): 0x47B9949041EbF2472332883e64025D5d024941C6
-----Encoded View---------------
18 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000001c0
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000200
Arg [2] : 000000000000000000000000000000000000000000084595161401484a000000
Arg [3] : 00000000000000000000000000000000000000000000003635c9adc5dea00000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000258
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [9] : 0000000000000000000000000000000000000000000000000000e35fa931a000
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000064
Arg [11] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [13] : 00000000000000000000000047b9949041ebf2472332883e64025d5d024941c6
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [15] : 4661697245524332300000000000000000000000000000000000000000000000
Arg [16] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [17] : 6665726300000000000000000000000000000000000000000000000000000000
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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.