Contract Name:
ERC20ByBankPad
Contract Source Code:
File 1 of 1 : ERC20ByBankPad
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// /,* (,,,,,,,,,,/ //,*
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// /
//
// Telegram: https://t.me/bankaieth
// Twitter: https://twitter.com/Bank_AIETH
// Website: https://bankai.app/
//
// @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
// @@ @@
// @@ This token was created by BankPad. visit us at https://bankai.app to learn more. @@
// @@ @@
// @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
// Sources flattened with hardhat v2.19.1 https://hardhat.org
// SPDX-License-Identifier: MIT
// File @openzeppelin/contracts/utils/[email protected]
// Original license: 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;
}
}
// File @openzeppelin/contracts/access/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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 Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
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);
}
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
// Original license: 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);
}
// File @openzeppelin/contracts/token/ERC20/extensions/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @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 {}
}
// File @openzeppelin/contracts/token/ERC20/extensions/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
_spendAllowance(account, _msgSender(), amount);
_burn(account, amount);
}
}
// File @openzeppelin/contracts/token/ERC20/extensions/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// File @openzeppelin/contracts/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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://consensys.net/diligence/blog/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/v0.8.0/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");
(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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// File @openzeppelin/contracts/token/ERC20/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
/**
* @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;
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
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'
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));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
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");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
* to be set to zero before setting it to a non-zero value, such as USDT.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
* Revert on invalid signature.
*/
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @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");
require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
/**
* @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).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
// 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 cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return
success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
}
}
// File contracts/token/AntiBotHelper.sol
// Original license: SPDX_License_Identifier: MIT
pragma solidity ^0.8.0;
/**
* @notice Anti-Bot Helper
* Max TX Amount feature
* Max Wallet Amount feature
* Sniper auto-burn feature
*/
abstract contract AntiBotHelper is Ownable {
/// @dev Minimum value that can be set for the max transaction limit - 0.25%
uint16 private constant MIN__MAX_TX_LIMIT = 25;
/// @dev Maximum value that can be set for the max transaction limit - 100%
uint16 private constant MAX__MAX_TX_LIMIT = 10000;
/// @dev Minimum value that can be set for the max hold limit - 0.25%
uint16 private constant MIN__MAX_HOLD_LIMIT = 25;
/// @dev Maximum value that can be set for the max hold limit - 100%
uint16 private constant MAX__MAX_HOLD_LIMIT = 10000;
/// @dev Minimum value that can be set for the anti-dump limit - 0.25%
uint16 internal constant MIN_ANTI_DUMP_LIMIT = 25;
/// @dev Maximum value that can be set for the anti-dump limit - 100%
uint16 private constant MAX_ANTI_DUMP_LIMIT = 10000;
/// @dev Anti-snipe tax is burned, reducing total supply
/// 1. 20% tax on buys in the first block
/// 2. Reducing to 13.33% in the second block
/// 3. Reducing to 6.66% in the third
/// 4. Finally 0% from the fourth block on
uint16 internal _autoBurnFirstPercent;
uint16 internal _autoBurnSecondPercent;
uint16 internal _autoBurnThirdPercent;
uint16 internal _maxTxLimit;
uint16 internal _maxHoldLimit;
uint16 internal _antiDumpLimit;
bool internal _isBlacklistOn;
bool internal _isAntiSniperOn;
bool internal _isTradingDelayed;
bool internal _isTradingDisabled;
uint256 internal _firstBuyAt;
uint256 internal _secondBuyAt;
uint256 internal _thirdBuyAt;
mapping(address => bool) internal _isExcludedFromTxLimit;
mapping(address => bool) internal _isExcludedFromHoldLimit;
mapping(address => bool) internal _blacklist;
event AccountBlacklisted(address account, bool flag);
event AntiDumpLimitUpdated(uint16 antiDumpLimit);
event ExcludedFromHoldLimit(address account, bool flag);
event ExcludedFromTxLimit(address account, bool flag);
event MaxLimitUpdated(uint16 maxHoldLimit, uint16 maxTxLimit);
event TradingDelayFinished();
event TradingEnabled();
/// @dev Initialize anti bot configuration
/// abi encoded param
/// 1. holdLimit
/// 2. txLimit
/// 3. antiDumpLimit
/// 4. antiSniperOn
/// 5. blacklistOn
function _initializeAntiBot(bytes memory param) internal {
(
uint16 holdLimit,
uint16 txLimit,
uint16 antiDumpLimit_,
bool antiSniperOn,
bool blacklistOn
) = abi.decode(param, (uint16, uint16, uint16, bool, bool));
require(
txLimit <= MAX__MAX_TX_LIMIT && txLimit >= MIN__MAX_TX_LIMIT,
"tx limit out of range"
);
require(
holdLimit <= MAX__MAX_HOLD_LIMIT &&
holdLimit >= MIN__MAX_HOLD_LIMIT,
"hold limit out of range"
);
require(txLimit <= holdLimit, "tx limit exceeds hold limit");
require(
antiDumpLimit_ == 0 ||
(antiDumpLimit_ >= MIN_ANTI_DUMP_LIMIT &&
antiDumpLimit_ <= MAX_ANTI_DUMP_LIMIT),
"anti-dump limit out of range"
);
_maxTxLimit = txLimit;
_maxHoldLimit = holdLimit;
_antiDumpLimit = antiDumpLimit_;
_isAntiSniperOn = antiSniperOn;
_isBlacklistOn = blacklistOn;
}
/// @dev Return anti-sniper auto-burn percent
function _antiSniperAutoBurn() internal returns (uint16) {
if (!_isAntiSniperOn) {
if (_firstBuyAt == 0) _firstBuyAt = block.timestamp;
return 0;
}
uint256 blockTime = block.timestamp;
if (blockTime == _thirdBuyAt) return _autoBurnThirdPercent;
if (blockTime == _secondBuyAt) return _autoBurnSecondPercent;
if (blockTime == _firstBuyAt) return _autoBurnFirstPercent;
if (_thirdBuyAt > 0) return 0;
if (_secondBuyAt > 0) {
_thirdBuyAt = block.timestamp;
return _autoBurnThirdPercent;
}
if (_firstBuyAt > 0) {
_secondBuyAt = block.timestamp;
return _autoBurnSecondPercent;
}
_firstBuyAt = block.timestamp;
return _autoBurnFirstPercent;
}
/// @notice Exclude / Include the multiple accounts from max tx limit
/// @dev Only callable by owner
function batchExcludeFromTxLimit(
address[] calldata accounts,
bool flag
) external onlyOwner {
uint256 len = accounts.length;
for (uint256 i; i < len; ) {
address account = accounts[i];
_isExcludedFromTxLimit[account] = flag;
unchecked {
++i;
}
emit ExcludedFromTxLimit(account, flag);
}
}
/// @notice Exclude / Include the multiple accounts from max wallet limit
/// @dev Only callable by owner
function batchExcludeFromHoldLimit(
address[] calldata accounts,
bool flag
) external onlyOwner {
uint256 len = accounts.length;
for (uint256 i; i < len; ) {
address account = accounts[i];
_isExcludedFromHoldLimit[account] = flag;
unchecked {
++i;
}
emit ExcludedFromHoldLimit(account, flag);
}
}
/// @notice Check if the account is excluded from max hold & wallet limit
/// @return bool excluded from max hold limit
/// @return bool excluded from max tx limit
function isExcludedFromLimit(
address account
) external view returns (bool, bool) {
return (
_isExcludedFromHoldLimit[account],
_isExcludedFromTxLimit[account]
);
}
/// @notice Update anti-dump limit
/// @param limit new anti-dump limit
function updateAntiDumpLimit(uint16 limit) external onlyOwner {
require(_antiDumpLimit != 0, "anti-dump not enabled");
require(
limit >= MIN_ANTI_DUMP_LIMIT && limit <= MAX_ANTI_DUMP_LIMIT,
"anti-dump limit out of range"
);
_antiDumpLimit = limit;
emit AntiDumpLimitUpdated(limit);
}
/// @notice View anti-dump limit
/// @return uint16 anti-dump limit percent
function antiDumpLimit() external view returns (uint16) {
return _antiDumpLimit;
}
/**
* @notice Check if the anti-dump feature is enabled in the token
*/
function isAntiDumpEnabled() external view returns (bool) {
return _antiDumpLimit >= MIN_ANTI_DUMP_LIMIT;
}
/**
* @notice Blacklist account
*/
function batchBlacklist(
address[] calldata accounts,
bool flag
) external onlyOwner {
require(_isBlacklistOn, "blacklist add-on disabled");
uint256 len = accounts.length;
for (uint256 i; i < len; ) {
_blacklist[accounts[i]] = flag;
emit AccountBlacklisted(accounts[i], flag);
unchecked {
++i;
}
}
}
/**
* @notice Check if the given account is blacklisted
*/
function isAccountBlacklisted(
address account
) external view returns (bool) {
return _blacklist[account];
}
/**
* @notice Check if the blacklist add-on is enabled in the token
*/
function isBlacklistEnabled() external view returns (bool) {
return _isBlacklistOn;
}
/// @notice Update max hold limit & max tx limit
/// @param holdLimit new max hold limit
/// @param txLimit new max tx limit
function updateMaxLimit(
uint16 holdLimit,
uint16 txLimit
) external onlyOwner {
require(holdLimit >= txLimit, "tx limit exceeds hold limit");
require(
_maxHoldLimit <= holdLimit && _maxTxLimit <= txLimit,
"increase only"
);
require(txLimit <= MAX__MAX_TX_LIMIT, "tx limit out of range");
require(holdLimit <= MAX__MAX_HOLD_LIMIT, "hold limit out of range");
_maxHoldLimit = holdLimit;
_maxTxLimit = txLimit;
emit MaxLimitUpdated(holdLimit, txLimit);
}
/// @notice View max hold limit & max tx limit
/// @return uint16 max hold limit percent
/// @return uint16 max tx limit percent
function maxLimit() external view returns (uint16, uint16) {
return (_maxHoldLimit, _maxTxLimit);
}
/// @notice Enable trading
function enableTrading() external onlyOwner {
require(_isTradingDisabled, "already enabled");
_isTradingDisabled = false;
emit TradingEnabled();
}
/// @notice View anti-bot mechanism flags
/// @return bool {_isAntiSniperOn}
/// @return bool {_isTradingDelayed}
/// @return bool {_isTradingDisabled}
function antiBotFlags() external view returns (bool, bool, bool) {
return (_isAntiSniperOn, _isTradingDelayed, _isTradingDisabled);
}
/**
* @dev function {snipeAutoBurnPercents}
*
* Return anti-snipe auto burn percent values for 3 steps
*
* @return uint16 first auto burn percent
* @return uint16 second auto burn percent
* @return uint16 third auto burn percent
*/
function snipeAutoBurnPercents()
external
view
returns (uint16, uint16, uint16)
{
return (
_autoBurnFirstPercent,
_autoBurnSecondPercent,
_autoBurnThirdPercent
);
}
}
// File contracts/interfaces/IBase.sol
// Original license: SPDX_License_Identifier: MIT
pragma solidity ^0.8.4;
interface IBase {
/// - antiBotParam
/// 1. holdLimit
/// 2. txLimit
/// 3. antiDumpLimit
/// 4. antiSniperOn
/// 5. blacklistOn
///
/// - taxParam
/// 1. dexRouter: uniswap or sushiswap
/// 2. pairedToken: eth or usdc
/// 3. taxPayAccount
/// 4. treasuryAccount
/// 5. buyTax
/// 6. sellTax
/// 7. treasuryTax
///
/// - distribParam
/// 1. totalSupply
/// 2. teamAccount
/// 3. teamAllocPercent
///
/// - lpParam
/// 1. isLPBurn
/// 2. isTradingDelayed
/// 3. isTradingDisabled
/// 4. pairedTokenAmount
/// 5. lockPeriod
struct TokenLaunchConf {
string uuid;
string name;
string symbol;
bytes distribParam;
bytes antiBotParam;
bytes taxParam;
bytes lpParam;
}
// Configuration inherited from the factory contract
struct InheritedConf {
uint16 autoBurnFirstPercent;
uint16 autoBurnSecondPercent;
uint16 autoBurnThirdPercent;
uint16 thresholdPercent;
uint16 maxBuyTaxAfter;
uint16 maxSellTaxAfter;
uint16 maxTreasuryTaxAfter;
uint16 bankPadTax;
uint16 maxTaxToRenounce;
uint32 bankPadTaxApplyPeriod;
uint32 taxWhitelistApplyDelay;
uint32 tradingDelayTime;
uint32 tradingDisableTime;
}
}
// File contracts/interfaces/IERC20FactoryByBankPad.sol
// Original license: SPDX_License_Identifier: MIT
pragma solidity ^0.8.4;
interface IERC20FactoryByBankPad {
/**
* @notice function {servicePayAccount}
*
* Return BankPad service pay account
*
* @return address service pay account
*/
function servicePayAccount() external view returns (address payable);
/**
* @dev function {maxTeamAllocForUUID}
*
* Return max team distribution percentage for the given `uuid` of token
* whitelisted token will return its max allocation percent
* return `_maxTeamAlloc` for others
*
* @param uuid token UUID
*/
function maxTeamAllocForUUID(
string calldata uuid
) external view returns (uint16);
}
// File contracts/interfaces/IDexRouter.sol
// Original license: SPDX_License_Identifier: MIT
pragma solidity ^0.8.4;
interface IDexFactory {
function createPair(
address tokenA,
address tokenB
) external returns (address pair);
}
interface IDexRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function getAmountsOut(
uint amountIn,
address[] calldata path
) external view returns (uint[] memory amounts);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
}
// File contracts/token/TaxHelper.sol
// Original license: SPDX_License_Identifier: MIT
pragma solidity ^0.8.0;
/**
* @notice Tax Helper
* Marketing fee
* Burn fee
* Fee in buy/sell/transfer separately
*/
abstract contract TaxHelper is Ownable {
using Address for address payable;
address internal constant ETH_ADDRESS =
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
bool internal _bankpadFeeApplied = true;
uint16 internal _buyTax;
uint16 internal _sellTax;
uint16 internal _treasuryTax;
/// @dev Max buy tax after token launched
uint16 internal _maxBuyTaxAfter;
/// @dev Max sell tax after token launched
uint16 internal _maxSellTaxAfter;
/// @dev Max treasury tax after token launched
uint16 internal _maxTreasuryTaxAfter;
/// @dev Bankpad tax is set on top buy / sell / treasury tax as a service fee
uint16 internal _bankPadTax;
address internal _dexRouter;
address internal _taxPayAccount;
address internal _treasuryAccount;
address internal _baseAmmPair;
address internal _basePairedToken;
mapping(address => bool) internal _isExcludedFromTax;
mapping(address => bool) internal _isAmmPair;
event ExcludedFromTax(address account, bool flag);
event NewAmmPair(address pair, bool flag);
event TaxesUpdated(uint16 buyTax, uint16 sellTax, uint16 treasuryTax);
/// @dev Initialize tax configuration
/// abi encoded param
/// 1. dexRouter: uniswap or sushiswap
/// 2. pairedToken: eth or usdc
/// 3. taxPayAccount
/// 4. buyTax
/// 5. sellTax
function _initializeTax(bytes memory param) internal {
(
address dexRouter,
address pairedToken,
address taxPayAccount,
address treasuryAccount,
uint16 buyTax,
uint16 sellTax,
uint16 treasuryTax
) = abi.decode(
param,
(address, address, address, address, uint16, uint16, uint16)
);
// tax pay account and treasury account are only available when buy/sell tax, treasury tax is greater then 0
if (buyTax > 0 || sellTax > 0)
require(taxPayAccount != address(0), "invalid tax pay account");
if (treasuryTax > 0)
require(treasuryAccount != address(0), "invalid treasury account");
// check if tax pay account and treasury account can receive ETH when the base pair token is ETH
if (pairedToken == ETH_ADDRESS) {
payable(taxPayAccount).sendValue(0);
payable(treasuryAccount).sendValue(0);
}
_dexRouter = dexRouter;
// pair with ETH or any other stable coin
address lpPair = IDexFactory(IDexRouter(dexRouter).factory())
.createPair(
address(this),
pairedToken == ETH_ADDRESS
? IDexRouter(dexRouter).WETH()
: pairedToken
);
_baseAmmPair = lpPair;
_basePairedToken = pairedToken;
_taxPayAccount = taxPayAccount;
_treasuryAccount = treasuryAccount;
_buyTax = buyTax;
_sellTax = sellTax;
_treasuryTax = treasuryTax;
_isAmmPair[lpPair] = true;
}
/// @notice Update buy / sell / treasury tax
/// @dev new tax values should not be greater than the `taxAfterLimit`
/// @param buyTax new buy tax value
/// @param sellTax new sell tax value
/// @param treasuryTax new treasury tax value
function updateTaxes(
uint16 buyTax,
uint16 sellTax,
uint16 treasuryTax
) external onlyOwner {
// gas-saving code
uint16 buyTax_ = _buyTax;
uint16 sellTax_ = _sellTax;
uint16 treasuryTax_ = _treasuryTax;
if (buyTax > buyTax_)
require(buyTax <= _maxBuyTaxAfter, "invalid buyTax");
if (sellTax > sellTax_)
require(sellTax <= _maxSellTaxAfter, "invalid sellTax");
if (treasuryTax > treasuryTax_)
require(treasuryTax <= _maxTreasuryTaxAfter, "invalid treasuryTax");
_buyTax = buyTax;
_sellTax = sellTax;
_treasuryTax = treasuryTax;
emit TaxesUpdated(buyTax, sellTax, treasuryTax);
}
/// @notice View taxes applied to the token
/// @return uint16 {_buyTax}
/// @return uint16 {_sellTax}
/// @return uint16 {_treasuryTax}
function taxes() external view returns (uint16, uint16, uint16) {
return (_buyTax, _sellTax, _treasuryTax);
}
/// @notice Exclude / Include the multiple accounts from tax
/// @dev Only callable by owner
function batchExcludeFromTax(
address[] calldata accounts,
bool flag
) external onlyOwner {
uint256 len = accounts.length;
for (uint256 i; i < len; ) {
address account = accounts[i];
_isExcludedFromTax[account] = flag;
unchecked {
++i;
}
emit ExcludedFromTax(account, flag);
}
}
/// @notice Check if the account is excluded from the fees
/// @param account: the account to be checked
function isExcludedFromTax(address account) external view returns (bool) {
return _isExcludedFromTax[account];
}
/// @notice Check if the {pair} is AMM pair
function isAmmPair(address pair) external view returns (bool) {
return _isAmmPair[pair];
}
/// @notice View tax receive accounts
/// @return address buy/sell tax pay account
/// @return address treasury tax pay account
function taxAccounts() external view returns (address, address) {
return (_taxPayAccount, _treasuryAccount);
}
/// @notice View amm related configuration addresses
/// @return address dex router address
/// @return address base paired token address
/// @return address base pair address from the dex router
function ammAddresses() external view returns (address, address, address) {
return (_dexRouter, _basePairedToken, _baseAmmPair);
}
/**
* @dev function {taxLimits}
*
* Return tax limits compared with current value and taxAfterLimits
*
* @return uint16 max buy tax limit
* @return uint16 max sell tax limit
* @return uint16 max treasury tax limit
*/
function taxLimits() external view returns (uint16, uint16, uint16) {
uint16 maxBuyTax = _buyTax < _maxBuyTaxAfter
? _maxBuyTaxAfter
: _buyTax;
uint16 maxSellTax = _sellTax < _maxSellTaxAfter
? _maxSellTaxAfter
: _sellTax;
uint16 maxTreasuryTax = _treasuryTax < _maxTreasuryTaxAfter
? _maxTreasuryTaxAfter
: _treasuryTax;
return (maxBuyTax, maxSellTax, maxTreasuryTax);
}
/**
* @dev function {taxLimits}
*
* Return tax limits which are used after token launched
*
* @return uint16 max buy tax limit
* @return uint16 max sell tax limit
* @return uint16 max treasury tax limit
*/
function taxAfterLimits() external view returns (uint16, uint16, uint16) {
return (_maxBuyTaxAfter, _maxSellTaxAfter, _maxTreasuryTaxAfter);
}
function bankPadTax() external view returns (uint16) {
return _bankPadTax;
}
}
// File contracts/token/ERC20ByBankPadBase.sol
// Original license: SPDX_License_Identifier: MIT
pragma solidity ^0.8.0;
contract ERC20ByBankPadBase is AntiBotHelper, TaxHelper, IBase, ERC20Burnable {
uint16 internal constant DENOMINATOR = 10000;
string public bankUUID;
address public immutable teamAccount;
address public immutable bankPadFactory;
bool internal _isLaunched;
bool internal _isTaxConvertEnabled = true;
/// @dev Ownership can be renounced only when buy/sell/treasury tax is below limit default 5%
uint16 private _maxTaxToRenounce;
/// @dev Bankpad tax is removed after some days default 15 days
uint32 internal _bankPadTaxApplyPeriod;
/// @dev Tax whitelist (exclude list) is not applied within some days after token launches default 2 days
uint32 internal _taxWhitelistApplyDelay;
/// @dev Token transfer is disabled for 1 mins once trading_delay flag is set
uint32 internal _tradingDelayTime = 1 minutes;
/// @dev Trading is disabled once {_isTradingDisabled} flag is set,
/// it is unset automatically after 7 days if owner does not enable trading
uint32 internal _tradingDisableTime = 7 days;
/// @dev Threshold amount of accumlated tax until swap to pair token
uint256 internal _thresholdAmount;
/// @dev Token launched time
uint256 internal _launchedAt;
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyFactory() {
require(bankPadFactory == _msgSender(), "caller is not the factory");
_;
}
constructor(
address factory_,
address deployer_,
TokenLaunchConf memory tokenLaunchConf_,
InheritedConf memory inheritedConf_
) ERC20(tokenLaunchConf_.name, tokenLaunchConf_.symbol) {
bankUUID = tokenLaunchConf_.uuid;
bankPadFactory = factory_;
_transferOwnership(deployer_);
_initializeAntiBot(tokenLaunchConf_.antiBotParam);
_initializeTax(tokenLaunchConf_.taxParam);
_copyInheritedConf(inheritedConf_);
_isExcludedFromHoldLimit[_baseAmmPair] = true;
(uint256 supply, address teamAccount_, uint16 teamAlloc) = abi.decode(
tokenLaunchConf_.distribParam,
(uint256, address, uint16)
);
teamAccount = teamAccount_;
// threshold amount is 0.1% of the total supply
_thresholdAmount = (supply * inheritedConf_.thresholdPercent) / DENOMINATOR;
// Distribute to team
if (teamAlloc > 0) {
require(teamAccount_ != address(0), "invalid team account");
require(
teamAlloc <=
IERC20FactoryByBankPad(factory_).maxTeamAllocForUUID(
tokenLaunchConf_.uuid
),
"too much team alloc"
);
uint256 teamAllocAmount = (supply * teamAlloc) / DENOMINATOR;
_mint(teamAccount_, teamAllocAmount);
supply -= teamAllocAmount;
}
// Mint rest tokens to the factory contract to add liquidity
_mint(factory_, supply);
}
/**
* @notice function {preLaunch}
*
* Configure token contract with the factory configuration
*
* @param param configuration structure from the factory
*/
function _copyInheritedConf(InheritedConf memory param) private {
_autoBurnFirstPercent = param.autoBurnFirstPercent;
_autoBurnSecondPercent = param.autoBurnSecondPercent;
_autoBurnThirdPercent = param.autoBurnThirdPercent;
_maxBuyTaxAfter = _buyTax < param.maxBuyTaxAfter ? _buyTax : param.maxBuyTaxAfter;
_maxSellTaxAfter = _sellTax < param.maxSellTaxAfter ? _sellTax : param.maxSellTaxAfter;
_maxTreasuryTaxAfter = _treasuryTax < param.maxTreasuryTaxAfter ? _treasuryTax : param.maxTreasuryTaxAfter;
_bankPadTax = param.bankPadTax;
_maxTaxToRenounce = param.maxTaxToRenounce;
_bankPadTaxApplyPeriod = param.bankPadTaxApplyPeriod;
_taxWhitelistApplyDelay = param.taxWhitelistApplyDelay;
_tradingDelayTime = param.tradingDelayTime;
_tradingDisableTime = param.tradingDisableTime;
}
/// @dev Check if the sell amount is not against the anti-dump feature
function _isValidSell(uint256 sellAmount) internal view {
uint256 totalSupply_ = totalSupply();
uint16 antiDumpLimit_ = _antiDumpLimit;
// when anti-dump feature is enabled, sell amount should be less than the anti-dump limit
require(
antiDumpLimit_ < MIN_ANTI_DUMP_LIMIT ||
(totalSupply_ * antiDumpLimit_) / DENOMINATOR >= sellAmount,
"anti-dump"
);
}
/**
* @notice function {launch}
*
* Finalize the initialization of the token contract and launch!
*
* @param tradingDelayed Once this flag is set, trading is delayed for 1 min
* @param tradingDisabled Once this flag is set, trading is disabled until it is set or 4 days
*/
function launch(
bool tradingDelayed,
bool tradingDisabled
) external onlyFactory {
require(!_isLaunched, "already launched");
_isLaunched = true;
// trading delay flag and trading disable flag can not set at the same time
require(
!tradingDelayed || !tradingDisabled,
"can not delayed and disabled"
);
_isTradingDelayed = tradingDelayed;
_isTradingDisabled = tradingDisabled;
_launchedAt = block.timestamp;
}
/**
* @notice function {batchSetAsAmmPair}
*
* Set / unset multiple pair addresses as AMM pair
* LP addresses should be excluded from hold limit
*
* @param pairs lp addresses
* @param flag true / false
*/
function batchSetAsAmmPair(
address[] calldata pairs,
bool flag
) external onlyOwner {
uint256 len = pairs.length;
for (uint256 i; i < len; ) {
address pair = pairs[i];
require(pair != _baseAmmPair, "can not access base amm pair");
_isAmmPair[pair] = flag;
_isExcludedFromHoldLimit[pair] = flag;
unchecked {
++i;
}
emit NewAmmPair(pair, flag);
}
}
/// @notice Renounce ownership of the token contract
/// @dev Only available when buy/sell tax is less than 5%
function renounceOwnership() public override onlyOwner {
uint16 maxTaxToRenounce_ = _maxTaxToRenounce;
require(
_buyTax <= maxTaxToRenounce_ &&
_sellTax <= maxTaxToRenounce_ &&
_treasuryTax <= maxTaxToRenounce_,
"lower taxes before renounce"
);
super.renounceOwnership();
}
/// @notice Enable conversion of token tax
function enableTaxConvert(bool flag) external onlyOwner {
_isTaxConvertEnabled = flag;
}
function isTaxConvertEnabled() external view returns (bool) {
return _isTaxConvertEnabled;
}
/// @notice Update the threshold amount for the swapping to occur
/// @dev Too small value will cause sell tx happens in every tx
function updateThresholdAmount(uint256 amount) external onlyOwner {
require(amount > 0, "invalid threshold");
_thresholdAmount = amount;
}
function thresholdAmount() external view returns (uint256) {
return _thresholdAmount;
}
function launchedAt() external view returns (uint256) {
return _launchedAt;
}
/**
* @dev function {maxTaxToRenounce}
*
* Return the tax condition for renouncing ownership of the token
*
* @return uint16 max tax values for renounce
*/
function maxTaxToRenounce() external view returns (uint16) {
return _maxTaxToRenounce;
}
/**
* @dev function {tradingTimes}
*
* Return token related time configuration
*
* @return uint32 trading delay time
* @return uint32 trading disable time
* @return uint32 BankPad tax apply period
* @return uint32 Tax whitelist delay period
*/
function timeConfiguration()
external
view
returns (uint32, uint32, uint32, uint32)
{
return (
_tradingDelayTime,
_tradingDisableTime,
_bankPadTaxApplyPeriod,
_taxWhitelistApplyDelay
);
}
}
// File contracts/token/ERC20ByBankPad.sol
pragma solidity ^0.8.0;
// Original license: SPDX_License_Identifier: MIT
contract ERC20ByBankPad is ERC20ByBankPadBase {
bytes32 public constant bankUUIDHash =
0x11647894f3c5bda261d91e16c88c55f44e8b0d2a7bee92a98cf0ba24d00980af;
using Address for address payable;
using SafeERC20 for IERC20;
bool private _inSwap;
modifier lockTheSwap() {
_inSwap = true;
_;
_inSwap = false;
}
constructor(
address factory_,
address deployer_,
TokenLaunchConf memory tokenLaunchConf_,
InheritedConf memory inheritedConf_
)
ERC20ByBankPadBase(
factory_,
deployer_,
tokenLaunchConf_,
inheritedConf_
)
{
_isExcludedFromTxLimit[address(0)] = true;
_isExcludedFromTxLimit[address(0xdead)] = true;
_isExcludedFromTxLimit[address(this)] = true;
_isExcludedFromTxLimit[deployer_] = true;
_isExcludedFromHoldLimit[address(0)] = true;
_isExcludedFromHoldLimit[address(0xdead)] = true;
_isExcludedFromHoldLimit[address(this)] = true;
_isExcludedFromHoldLimit[deployer_] = true;
_isExcludedFromTax[address(0)] = true;
_isExcludedFromTax[address(0xdead)] = true;
_isExcludedFromTax[address(this)] = true;
_isExcludedFromTax[deployer_] = true;
}
/**
* @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 override {
if (!_isLaunched) {
super._afterTokenTransfer(from, to, amount);
return;
}
_checkTradingDelayedOrDisabled(from, to);
// check blacklist
// tokens can not be transferred to the blacklisted account
// blacklisted account can transfer tokens to the owner, or burn them
require(
(to == address(0) || to == owner()) ||
(!_blacklist[from] && !_blacklist[to]),
"blacklisted"
);
uint256 totalSupply_ = totalSupply();
// check max tx limit
require(
_isExcludedFromTxLimit[from] ||
_isExcludedFromTxLimit[to] ||
amount <= (totalSupply_ * _maxTxLimit) / DENOMINATOR,
"tx amount limited"
);
// check max wallet amount limit
require(
_isExcludedFromHoldLimit[to] ||
balanceOf(to) <= (totalSupply_ * _maxHoldLimit) / DENOMINATOR,
"receiver hold limited"
);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
// token transfer before token launches like mint / add liquidity will not charge taxes
if (!_isLaunched) {
super._transfer(from, to, amount);
return;
}
uint256 blockTime = block.timestamp;
uint256 bankPadTaxApplyPeriod = _bankPadTaxApplyPeriod;
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
// tax whitelist is only applied after 2 days of the first buy
// but, token transfer from the token contract itself should be whitelisted
bool isWhitelisted = from == address(this) ||
((_isExcludedFromTax[from] || _isExcludedFromTax[to]) &&
_firstBuyAt > 0 &&
blockTime >= _firstBuyAt + _taxWhitelistApplyDelay);
bool isBuyTx = _isAmmPair[from];
bool isSellTx = _isAmmPair[to];
bool isBankpadOverTime = _bankpadFeeApplied &&
_firstBuyAt > 0 &&
blockTime > _firstBuyAt + bankPadTaxApplyPeriod;
// swap accumlated tax into ETH or USDC
if (
!_inSwap &&
!isWhitelisted &&
!isBuyTx &&
_isTaxConvertEnabled &&
(isBankpadOverTime || contractTokenBalance >= _thresholdAmount)
) {
// although the bankpad tax period is finished, there may still be accumulated taxes thus far.
// in this case, we will swap all those taxes into ETH / USDC.
// when the bankpad fee period is over, swap all accumlated taxes
if (isBankpadOverTime) _swapToPairedToken(contractTokenBalance);
else _swapToPairedToken(_thresholdAmount);
if (isBankpadOverTime) _bankpadFeeApplied = false;
}
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
uint256 fees;
if (!isWhitelisted) {
if (isBuyTx) {
// bankpad tax is applied on top of buy tax for 15 days
// its 10% of buy tax
if (
_bankpadFeeApplied &&
(_firstBuyAt == 0 ||
blockTime <= _firstBuyAt + bankPadTaxApplyPeriod)
)
fees =
(amount *
(_buyTax + _treasuryTax) *
(DENOMINATOR + _bankPadTax)) /
DENOMINATOR /
DENOMINATOR;
else fees = (amount * (_buyTax + _treasuryTax)) / DENOMINATOR;
// for the first buy txs, anti sniper auto-burn is applied
// this is applied for 3 blocks
uint256 autoBurnPerc = _antiSniperAutoBurn();
if (autoBurnPerc > 0) {
uint256 autoBurnAmount = (amount * autoBurnPerc) /
DENOMINATOR;
_burn(from, autoBurnAmount);
amount -= autoBurnAmount;
}
} else if (isSellTx) {
_isValidSell(amount);
// bankpad tax is applied on top of sell tax for 15 days
// its 10% of buy tax
if (
_bankpadFeeApplied &&
(_firstBuyAt == 0 ||
blockTime <= _firstBuyAt + bankPadTaxApplyPeriod)
)
fees =
(amount *
(_sellTax + _treasuryTax) *
(DENOMINATOR + _bankPadTax)) /
DENOMINATOR /
DENOMINATOR;
else fees = (amount * (_sellTax + _treasuryTax)) / DENOMINATOR;
}
if (fees > 0) super._transfer(from, address(this), fees);
amount -= fees;
}
super._transfer(from, to, amount);
}
function _checkTradingDelayedOrDisabled(address from, address to) private {
address teamAccount_ = teamAccount; // gas-saving code
address tokenOwner = owner(); // gas-saving code
// token owner or team account is not restricted by trading delay or trading manually enable trading feature
if (
teamAccount_ == from ||
teamAccount_ == to ||
tokenOwner == from ||
tokenOwner == to
) return;
uint256 blockTime = block.timestamp;
// check if the trading delayed
if (_isTradingDelayed) {
if (blockTime < _launchedAt + _tradingDelayTime)
revert("trading delayed");
_isTradingDelayed = false;
emit TradingDelayFinished();
}
// check if the trading disabled
if (_isTradingDisabled) {
if (blockTime < _launchedAt + _tradingDisableTime)
revert("trading disabled");
// enable trading after 4 days
_isTradingDisabled = false;
emit TradingEnabled();
}
}
/**
* @dev Swap token accumlated in this contract to the base paired token
*
* According to the paired token
* - when paired token is ETH, swapToETH function is called
* - when paired token is another token, swapToToken is called
*/
function _swapToPairedToken(uint256 amount) private lockTheSwap {
if (amount == 0) return;
address basePairedToken_ = _basePairedToken;
address payable servicePayAccount = IERC20FactoryByBankPad(
bankPadFactory
).servicePayAccount();
address payable taxPayAccount = payable(_taxPayAccount);
address payable treasuryAccount = payable(_treasuryAccount);
if (basePairedToken_ == ETH_ADDRESS) {
uint256 swappedAmount = _swapToETH(amount);
if (swappedAmount > 0) {
// send bankpad fee
if (_bankpadFeeApplied) {
uint256 bankpadFeeAmount = _calcBankpadFee(swappedAmount);
servicePayAccount.sendValue(bankpadFeeAmount);
swappedAmount -= bankpadFeeAmount;
}
// send treasury tax
if (_treasuryTax > 0 && treasuryAccount != address(0)) {
uint256 treasuryFeeAmount = _calcTreasuryFee(swappedAmount);
treasuryAccount.sendValue(treasuryFeeAmount);
swappedAmount -= treasuryFeeAmount;
}
// send buy/sell tax
if (taxPayAccount != address(0))
taxPayAccount.sendValue(swappedAmount);
}
} else {
uint256 swappedAmount = _swapToToken(basePairedToken_, amount);
if (swappedAmount > 0) {
// send bankpad fee
if (_bankpadFeeApplied) {
uint256 bankpadFeeAmount = _calcBankpadFee(swappedAmount);
IERC20(basePairedToken_).safeTransfer(
servicePayAccount,
bankpadFeeAmount
);
swappedAmount -= bankpadFeeAmount;
}
// send treasury tax
if (_treasuryTax > 0 && treasuryAccount != address(0)) {
uint256 treasuryFeeAmount = _calcTreasuryFee(swappedAmount);
IERC20(basePairedToken_).safeTransfer(
treasuryAccount,
treasuryFeeAmount
);
swappedAmount -= treasuryFeeAmount;
}
// send buy/sell tax
if (taxPayAccount != address(0))
IERC20(basePairedToken_).safeTransfer(
taxPayAccount,
swappedAmount
);
}
}
}
/// @dev Calculate bankpad fee amount from the swapped total tax amount
function _calcBankpadFee(
uint256 swappedAmount
) private view returns (uint256) {
uint16 bankPadTax = _bankPadTax;
return (swappedAmount * bankPadTax) / (DENOMINATOR + bankPadTax);
}
/// @dev Calculate treasury fee amount from the swapped tax amount
function _calcTreasuryFee(
uint256 swappedAmount
) private view returns (uint256) {
// gas-saving codes
uint16 buyTax_ = _buyTax;
uint16 sellTax_ = _sellTax;
uint16 treasuryTax_ = _treasuryTax;
return
(swappedAmount * 2 * treasuryTax_) /
(buyTax_ + sellTax_ + 2 * treasuryTax_);
}
function _swapToToken(
address token,
uint256 amount
) private returns (uint256) {
// generate the uniswap pair path of token -> stable coin
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = token;
IDexRouter dexRouter_ = IDexRouter(_dexRouter);
_approve(address(this), address(dexRouter_), amount);
uint256 balanceBefore = IERC20(token).balanceOf(address(this));
// make the swap
try
dexRouter_.swapExactTokensForTokensSupportingFeeOnTransferTokens(
amount,
0, // accept any amount of tokens
path,
address(this),
block.timestamp + 300
)
{
return IERC20(token).balanceOf(address(this)) - balanceBefore;
} catch (bytes memory /* lowLevelData */) {}
return 0;
}
function _swapToETH(uint256 amount) private returns (uint256) {
IDexRouter dexRouter_ = IDexRouter(_dexRouter);
// generate the uniswap pair path of token -> eth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = dexRouter_.WETH();
_approve(address(this), address(dexRouter_), amount);
uint256 balanceBefore = address(this).balance;
// make the swap
try
dexRouter_.swapExactTokensForETHSupportingFeeOnTransferTokens(
amount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp + 300
)
{
return address(this).balance - balanceBefore;
} catch (bytes memory /* lowLevelData */) {}
return 0;
}
receive() external payable {}
/**
* @dev It allows the admin to recover tokens sent to the contract
* @param token_: the address of the token to withdraw
* @param amount_: the number of tokens to withdraw
*
* This function is only callable by owner
*/
function recoverToken(address token_, uint256 amount_) external onlyOwner {
IERC20(token_).safeTransfer(_msgSender(), amount_);
}
/**
* @dev It allows the admin to recover ETH sent to the contract
* @param amount_: the number of ETH to withdraw
*
* This function is only callable by owner
*/
function recoverETH(uint256 amount_) external onlyOwner {
payable(_msgSender()).sendValue(amount_);
}
}