Contract Name:
RemnantTokenPolygon
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "./extensions/BP.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract RemnantTokenPolygon is ERC20, Ownable, BP {
// For team, staking, P2E ecosystem, other
address public constant ADDRESS_ECOSYSTEM = 0x88e50b87F39E5abb4ef94eC3794314f74F31c63a;
address public constant ADDRESS_BACKERS = 0x44e13ED3Aae3bbB4f3cDe8acaAF4d25036CC270a;
address public constant ADDRESS_STAKING = 0xc5522C9F6F3c9CD87bF74EDe5424dcF3a4b8b29D;
address public constant ADDRESS_TEAM = 0x73b4eFF6Af5C7EA220403B009fFf0c0dA2d19C67;
address public constant ADDRESS_LIQUIDITY = 0x65B903979CD209233a481B29cdD1f030612dE605;
address public constant ADDRESS_MARKETING = 0xaBe19e6fd481c424b00D3a8aF70C77d7aE55E70d;
address public constant ADDRESS_TREASURY = 0x4A8Cd013879c4D48C96EAA50dE9Af2969e297586;
address public constant ADDRESS_DEVELOPMENT = 0x7496e1D91f7Dcad9a4889a9A023736850300fE97;
address public childChainManagerProxy;
address deployer;
constructor(address _childChainManagerProxy) ERC20("Remnant", "REMN") {
childChainManagerProxy = _childChainManagerProxy;
deployer = msg.sender;
// Can't mint here, because minting in child chain smart contract's constructor not allowed
}
// Being proxified smart contract, most probably childChainManagerProxy contract's address
function updateChildChainManager(address newChildChainManagerProxy) external {
require(newChildChainManagerProxy != address(0), "Bad ChildChainManagerProxy address");
require(msg.sender == deployer, "You're not allowed");
childChainManagerProxy = newChildChainManagerProxy;
}
/**
* @notice called when token is deposited on root chain
* @dev Should be callable only by ChildChainManager
* Should handle deposit by minting the required amount for user
* Make sure minting is done only by this function
* @param user user address for whom deposit is being done
* @param depositData abi encoded amount
*/
function deposit(address user, bytes calldata depositData) external {
require(msg.sender == childChainManagerProxy, "You're not allowed to deposit");
uint256 amount = abi.decode(depositData, (uint256));
_mint(user, amount);
}
/**
* @notice called when user wants to withdraw tokens back to root chain
* @dev Should burn user's tokens. This transaction will be verified when exiting on root chain
* @param amount amount of tokens to withdraw
*/
function withdraw(uint256 amount) external {
_burn(msg.sender, amount);
}
/**
* @dev Check before token transfer if bot protection is on, to block suspicious transactions
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal override {
// Bot/snipe protection requirements if bp (bot protection) is on, and is not already permanently disabled
if (bpEnabled) {
if (!bpPermanentlyDisabled && msg.sender != owner()) { // Save gas, don't check if don't pass bpEnabled
require(!bpBlacklisted[from] && !bpBlacklisted[to], "BP: Account is blacklisted"); // Must not be blacklisted
if (bpTradingBlocked) {
if (from != bpDistributionAddr) // Token distributor bypasses block
{
if (to != bpWhitelistedStakingPool && to != bpWhitelistAddr) {
revert Blocked(); // If trading is blocked, revert if not sending to the whitelisted address (i.e. Staking pool)
}
}
}
require(tx.gasprice <= bpMaxGas, "BP: Gas setting exceeds allowed limit"); // Must set gas below allowed limit
// If user is buying (from swap), check that the buy amount is less than the limit (this will not block other transfers unrelated to swap liquidity)
if (bpSwapPairRouterPool == from) {
require(amount <= bpMaxBuyAmount, "BP: Buy exceeds allowed limit"); // Cannot buy more than allowed limit
require(bpAddressTimesTransacted[to] < bpAllowedNumberOfTx, "BP: Exceeded number of allowed transactions");
if (!bpTradingEnabled) {
bpBlacklisted[to] = true; // Blacklist wallet if it tries to trade (i.e. bot automatically trying to snipe liquidity)
revert SwapNotEnabledYet(); // Revert with error message
} else {
bpAddressTimesTransacted[to] += 1; // User has passed transaction conditions, so add to mapping (to limit user to 2 transactions)
}
// If user is selling (from swap), check that the sell amount is less than the limit. The code is mostly repeated to avoid declaring variable and wasting gas.
} else if (bpSwapPairRouterPool == to) {
require(amount <= bpMaxSellAmount, "BP: Sell exceeds limit"); // Cannot sell more than allowed limit
require(bpAddressTimesTransacted[from] < bpAllowedNumberOfTx, "BP: Exceeded number of allowed transactions");
if (!bpTradingEnabled) {
bpBlacklisted[from] = true; // Blacklist wallet if it tries to trade (i.e. bot automatically trying to snipe liquidity)
revert SwapNotEnabledYet(); // Revert with error message
} else {
bpAddressTimesTransacted[from] += 1; // User has passed transaction conditions, so add to mapping (to limit user to 2 transactions)
}
}
}
}
super._beforeTokenTransfer(from, to, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
import "@openzeppelin/contracts/access/Ownable.sol";
error SwapNotEnabledYet();
error Blocked();
contract BP is Ownable {
// For bp (bot protection), to deter liquidity sniping, enabled during first moments of each swap liquidity (ie. Uniswap, Quickswap, etc)
uint256 public bpAllowedNumberOfTx; // Max allowed number of buys/sells on swap during bp per address
uint256 public bpMaxGas; // Max gwei per trade allowed during bot protection
uint256 public bpMaxBuyAmount; // Max number of tokens an address can buy during bot protection
uint256 public bpMaxSellAmount; // Max number of tokens an address can sell during bot protection
bool public bpEnabled; // Bot protection, on or off
bool public bpTradingEnabled; // Enables trading during bot protection period
bool public bpPermanentlyDisabled; // Starts false, but when set to true, is permanently true. Let's public see that it is off forever.
address public bpSwapPairRouterPool; // ie. Uniswap V2 ETH-REMN Pool (router) for bot protected buy/sell, add after pool established.
bool public bpTradingBlocked; // Token might want to block trading until liquidity is added
address public bpWhitelistedStakingPool; // Whitelist staking pool so users can send to it regardless of trading block
address public bpWhitelistAddr; // Whitelist an additional address (i.e. Another staking pool)
address public bpDistributionAddr; // Distribution address, which bypasses any bot protection trading block
mapping (address => uint256) public bpAddressTimesTransacted; // Mapped value counts number of times transacted (2 max per address during bp)
mapping (address => bool) public bpBlacklisted; // If wallet tries to trade after liquidity is added but before owner sets trading on, wallet is blacklisted
/**
* @dev Toggles bot protection, blocking suspicious transactions during liquidity events.
*/
function bpToggleOnOff() external onlyOwner {
bpEnabled = !bpEnabled;
}
/**
* @dev Sets max gwei allowed in transaction when bot protection is on.
*/
function bpSetMaxGwei(uint256 gweiAmount) external onlyOwner {
bpMaxGas = gweiAmount;
}
/**
* @dev Sets max buy value when bot protection is on.
*/
function bpSetMaxBuyValue(uint256 val) external onlyOwner {
bpMaxBuyAmount = val;
}
/**
* @dev Sets max sell value when bot protection is on.
*/
function bpSetMaxSellValue(uint256 val) external onlyOwner {
bpMaxSellAmount = val;
}
/**
* @dev Sets swap pair pool address (i.e. Uniswap V2 ETH-REMN pool, for bot protection)
*/
function bpSetSwapPairPool(address addr) external onlyOwner {
bpSwapPairRouterPool = addr;
}
/**
* @dev Sets staking pool address so that users are not blocked from staking during trading block
*/
function bpSetWhitelistedStakingPool(address addr) external onlyOwner {
bpWhitelistedStakingPool = addr;
}
/**
* @dev Sets a whitelist address that users can send to during trading block (i.e. sale event or additional stkaing pool)
*/
function bpSetWhitelistedAddress(address addr) external onlyOwner {
bpWhitelistAddr = addr;
}
/**
* @dev Sets the distribution address
*/
function bpSetDistributionAddress(address addr) external onlyOwner {
bpDistributionAddr = addr;
}
/**
* @dev Turns off bot protection permanently.
*/
function bpDisablePermanently() external onlyOwner {
bpEnabled = false;
bpPermanentlyDisabled = true;
}
function bpAddBlacklist(address addr) external onlyOwner {
bpBlacklisted[addr] = true;
}
function bpRemoveBlacklist(address addr) external onlyOwner {
bpBlacklisted[addr] = false;
}
/**
* @dev Toggles bot protection trading (requires bp not permanently disabled)
*/
function bpToggleTrading() external onlyOwner {
require(!bpPermanentlyDisabled, "Cannot toggle when bot protection is already disabled permanently");
bpTradingEnabled = !bpTradingEnabled;
}
/**
* @dev Toggles token transfers (all trading), during bp
*/
function bpToggleTradingBlock() external onlyOwner {
bpTradingBlocked = !bpTradingBlocked;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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.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:
*
* - `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 `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:
*
* - `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;
}
_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;
_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 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 (access/Ownable.sol)
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() {
_transferOwnership(_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 {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts 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
// OpenZeppelin Contracts (last updated v4.6.0) (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 (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);
}