Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
74,301,524.57797248968751346 AURA
Holders
4,664 ( -0.257%)
Market
Price
$0.54 @ 0.000204 ETH (-0.66%)
Onchain Market Cap
$39,986,628.58
Circulating Supply Market Cap
$26,851,661.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
3.59 AURAValue
$1.93 ( ~0.000732353341996122 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
AuraToken
Compiler Version
v0.8.11+commit.d7f03943
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.11; import { ERC20 } from "@openzeppelin/contracts-0.8/token/ERC20/ERC20.sol"; import { AuraMath } from "./AuraMath.sol"; interface IStaker { function operator() external view returns (address); } /** * @title AuraToken * @notice Basically an ERC20 with minting functionality operated by the "operator" of the VoterProxy (Booster). * @dev The minting schedule is based on the amount of CRV earned through staking and is * distirbuted along a supply curve (cliffs etc). Fork of ConvexToken. */ contract AuraToken is ERC20 { using AuraMath for uint256; address public operator; address public immutable vecrvProxy; uint256 public constant EMISSIONS_MAX_SUPPLY = 5e25; // 50m uint256 public constant INIT_MINT_AMOUNT = 5e25; // 50m uint256 public constant totalCliffs = 500; uint256 public immutable reductionPerCliff; address public minter; uint256 private minterMinted = type(uint256).max; /* ========== EVENTS ========== */ event Initialised(); event OperatorChanged(address indexed previousOperator, address indexed newOperator); /** * @param _proxy CVX VoterProxy * @param _nameArg Token name * @param _symbolArg Token symbol */ constructor( address _proxy, string memory _nameArg, string memory _symbolArg ) ERC20(_nameArg, _symbolArg) { operator = msg.sender; vecrvProxy = _proxy; reductionPerCliff = EMISSIONS_MAX_SUPPLY.div(totalCliffs); } /** * @dev Initialise and mints initial supply of tokens. * @param _to Target address to mint. * @param _minter The minter address. */ function init(address _to, address _minter) external { require(msg.sender == operator, "Only operator"); require(totalSupply() == 0, "Only once"); require(_minter != address(0), "Invalid minter"); _mint(_to, INIT_MINT_AMOUNT); updateOperator(); minter = _minter; minterMinted = 0; emit Initialised(); } /** * @dev This can be called if the operator of the voterProxy somehow changes. */ function updateOperator() public { require(totalSupply() != 0, "!init"); address newOperator = IStaker(vecrvProxy).operator(); require(newOperator != operator && newOperator != address(0), "!operator"); emit OperatorChanged(operator, newOperator); operator = newOperator; } /** * @dev Mints AURA to a given user based on the BAL supply schedule. */ function mint(address _to, uint256 _amount) external { require(totalSupply() != 0, "Not initialised"); if (msg.sender != operator) { // dont error just return. if a shutdown happens, rewards on old system // can still be claimed, just wont mint cvx return; } // e.g. emissionsMinted = 6e25 - 5e25 - 0 = 1e25; uint256 emissionsMinted = totalSupply() - INIT_MINT_AMOUNT - minterMinted; // e.g. reductionPerCliff = 5e25 / 500 = 1e23 // e.g. cliff = 1e25 / 1e23 = 100 uint256 cliff = emissionsMinted.div(reductionPerCliff); // e.g. 100 < 500 if (cliff < totalCliffs) { // e.g. (new) reduction = (500 - 100) * 2.5 + 700 = 1700; // e.g. (new) reduction = (500 - 250) * 2.5 + 700 = 1325; // e.g. (new) reduction = (500 - 400) * 2.5 + 700 = 950; uint256 reduction = totalCliffs.sub(cliff).mul(5).div(2).add(700); // e.g. (new) amount = 1e19 * 1700 / 500 = 34e18; // e.g. (new) amount = 1e19 * 1325 / 500 = 26.5e18; // e.g. (new) amount = 1e19 * 950 / 500 = 19e17; uint256 amount = _amount.mul(reduction).div(totalCliffs); // e.g. amtTillMax = 5e25 - 1e25 = 4e25 uint256 amtTillMax = EMISSIONS_MAX_SUPPLY.sub(emissionsMinted); if (amount > amtTillMax) { amount = amtTillMax; } _mint(_to, amount); } } /** * @dev Allows minter to mint to a specific address */ function minterMint(address _to, uint256 _amount) external { require(msg.sender == minter, "Only minter"); minterMinted += _amount; _mint(_to, _amount); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (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.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * 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}. * * The default 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"); unchecked { _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"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * 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: * * - `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"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(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: * * - `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; _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; } _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 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 pragma solidity 0.8.11; /// @notice A library for performing overflow-/underflow-safe math, /// updated with awesomeness from of DappHub (https://github.com/dapphub/ds-math). library AuraMath { /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; } function sub(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a - b; } function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a * b; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return 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); } function to224(uint256 a) internal pure returns (uint224 c) { require(a <= type(uint224).max, "AuraMath: uint224 Overflow"); c = uint224(a); } function to128(uint256 a) internal pure returns (uint128 c) { require(a <= type(uint128).max, "AuraMath: uint128 Overflow"); c = uint128(a); } function to112(uint256 a) internal pure returns (uint112 c) { require(a <= type(uint112).max, "AuraMath: uint112 Overflow"); c = uint112(a); } function to96(uint256 a) internal pure returns (uint96 c) { require(a <= type(uint96).max, "AuraMath: uint96 Overflow"); c = uint96(a); } function to32(uint256 a) internal pure returns (uint32 c) { require(a <= type(uint32).max, "AuraMath: uint32 Overflow"); c = uint32(a); } } /// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint32. library AuraMath32 { function sub(uint32 a, uint32 b) internal pure returns (uint32 c) { c = a - b; } } /// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint112. library AuraMath112 { function add(uint112 a, uint112 b) internal pure returns (uint112 c) { c = a + b; } function sub(uint112 a, uint112 b) internal pure returns (uint112 c) { c = a - b; } } /// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint224. library AuraMath224 { function add(uint224 a, uint224 b) internal pure returns (uint224 c) { c = a + b; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol) 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 // 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 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; } }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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teMutability":"nonpayable","type":"function"},{"inputs":[],"name":"updateOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"vecrvProxy","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]
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)
000000000000000000000000af52695e1bb01a16d33d7194c28c42b10e0dbec2000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000004417572610000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044155524100000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _proxy (address): 0xaF52695E1bB01A16D33D7194C28C42b10e0Dbec2
Arg [1] : _nameArg (string): Aura
Arg [2] : _symbolArg (string): AURA
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000af52695e1bb01a16d33d7194c28c42b10e0dbec2
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [4] : 4175726100000000000000000000000000000000000000000000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [6] : 4155524100000000000000000000000000000000000000000000000000000000
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