Feature Tip: Add private address tag to any address under My Name Tag !
ERC-20
Bridge
Overview
Max Total Supply
1,000,000,000 TRESTLE
Holders
2,219 (0.00%)
Market
Price
$0.00 @ 0.000001 ETH (-15.86%)
Onchain Market Cap
$1,363,860.00
Circulating Supply Market Cap
$0.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Source Code Verified (Exact Match)
Contract Name:
Trestle
Compiler Version
v0.8.23+commit.f704f362
Optimization Enabled:
Yes with 1000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.23; // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) // OpenZeppelin Contracts (last updated v5.0.0) (utils/Context.sol) /** * @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; } } /** * @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. * * The initial owner is set to the address provided by the deployer. 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; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @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 { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @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 { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _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); } } // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol) // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) /** * @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 value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` 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 value) external returns (bool); } // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol) /** * @dev Interface for the optional metadata functions from the ERC20 standard. */ 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); } // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol) /** * @dev Standard ERC20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens. */ interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender); } /** * @dev Standard ERC721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens. */ interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator); } /** * @dev Standard ERC1155 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens. */ interface IERC1155Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. * @param tokenId Identifier number of a token. */ error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC1155InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC1155InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param owner Address of the current owner of a token. */ error ERC1155MissingApprovalForAll(address operator, address owner); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC1155InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC1155InvalidOperator(address operator); /** * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation. * Used in batch transfers. * @param idsLength Length of the array of token identifiers * @param valuesLength Length of the array of token amounts */ error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength); } /** * @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}. * * 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. */ abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors { mapping(address account => uint256) private _balances; mapping(address account => mapping(address spender => 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 returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual 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 returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual 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 `value`. */ function transfer(address to, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _transfer(owner, to, value); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `value` 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 value) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, value); 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 `value`. * - the caller must have allowance for ``from``'s tokens of at least * `value`. */ function transferFrom(address from, address to, uint256 value) public virtual returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, value); _transfer(from, to, value); return true; } /** * @dev Moves a `value` 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. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _transfer(address from, address to, uint256 value) internal { if (from == address(0)) { revert ERC20InvalidSender(address(0)); } if (to == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(from, to, value); } /** * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from` * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding * this function. * * Emits a {Transfer} event. */ function _update(address from, address to, uint256 value) internal virtual { if (from == address(0)) { // Overflow check required: The rest of the code assumes that totalSupply never overflows _totalSupply += value; } else { uint256 fromBalance = _balances[from]; if (fromBalance < value) { revert ERC20InsufficientBalance(from, fromBalance, value); } unchecked { // Overflow not possible: value <= fromBalance <= totalSupply. _balances[from] = fromBalance - value; } } if (to == address(0)) { unchecked { // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply. _totalSupply -= value; } } else { unchecked { // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256. _balances[to] += value; } } emit Transfer(from, to, value); } /** * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0). * Relies on the `_update` mechanism * * Emits a {Transfer} event with `from` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _mint(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(address(0), account, value); } /** * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply. * Relies on the `_update` mechanism. * * Emits a {Transfer} event with `to` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead */ function _burn(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidSender(address(0)); } _update(account, address(0), value); } /** * @dev Sets `value` 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. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address owner, address spender, uint256 value) internal { _approve(owner, spender, value, true); } /** * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event. * * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any * `Approval` event during `transferFrom` operations. * * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to * true using the following override: * ``` * function _approve(address owner, address spender, uint256 value, bool) internal virtual override { * super._approve(owner, spender, value, true); * } * ``` * * Requirements are the same as {_approve}. */ function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual { if (owner == address(0)) { revert ERC20InvalidApprover(address(0)); } if (spender == address(0)) { revert ERC20InvalidSpender(address(0)); } _allowances[owner][spender] = value; if (emitEvent) { emit Approval(owner, spender, value); } } /** * @dev Updates `owner` s allowance for `spender` based on spent `value`. * * Does not update the allowance value in case of infinite allowance. * Revert if not enough allowance is available. * * Does not emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 value) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { if (currentAllowance < value) { revert ERC20InsufficientAllowance(spender, currentAllowance, value); } unchecked { _approve(owner, spender, currentAllowance - value, false); } } } } // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol) // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20Metadata.sol) // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) /** * @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. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ 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]. * * CAUTION: See Security Considerations above. */ 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); } // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @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 or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * 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. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @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`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) 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 FailedInnerCall(); } } } /** * @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 An operation with an ERC20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @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.encodeCall(token.transfer, (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.encodeCall(token.transferFrom, (from, to, 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); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @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.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @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); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @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(token).code.length > 0; } } // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/ERC20Burnable.sol) /** * @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 a `value` amount of tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 value) public virtual { _burn(_msgSender(), value); } /** * @dev Destroys a `value` amount of 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 * `value`. */ function burnFrom(address account, uint256 value) public virtual { _spendAllowance(account, _msgSender(), value); _burn(account, value); } } // OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol) /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant NOT_ENTERED = 1; uint256 private constant ENTERED = 2; uint256 private _status; /** * @dev Unauthorized reentrant call. */ error ReentrancyGuardReentrantCall(); constructor() { _status = NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be NOT_ENTERED if (_status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // Any calls to nonReentrant after this point will fail _status = ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == ENTERED; } } interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); 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 addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( 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 swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } pragma abicoder v2; /// @title Callback for IUniswapV3PoolActions#swap /// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface interface IUniswapV3SwapCallback { /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap. /// @dev In the implementation you must pay the pool tokens owed for the swap. /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory. /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped. /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by /// the end of the swap. If positive, the callback must send that amount of token0 to the pool. /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by /// the end of the swap. If positive, the callback must send that amount of token1 to the pool. /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call function uniswapV3SwapCallback( int256 amount0Delta, int256 amount1Delta, bytes calldata data ) external; } /// @title Router token swapping functionality /// @notice Functions for swapping tokens via Uniswap V3 interface ISwapRouter is IUniswapV3SwapCallback { struct ExactInputSingleParams { address tokenIn; address tokenOut; uint24 fee; address recipient; uint256 deadline; uint256 amountIn; uint256 amountOutMinimum; uint160 sqrtPriceLimitX96; } /// @notice Swaps `amountIn` of one token for as much as possible of another token /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata /// @return amountOut The amount of the received token function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut); struct ExactInputParams { bytes path; address recipient; uint256 deadline; uint256 amountIn; uint256 amountOutMinimum; } /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata /// @return amountOut The amount of the received token function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut); struct ExactOutputSingleParams { address tokenIn; address tokenOut; uint24 fee; address recipient; uint256 deadline; uint256 amountOut; uint256 amountInMaximum; uint160 sqrtPriceLimitX96; } /// @notice Swaps as little as possible of one token for `amountOut` of another token /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata /// @return amountIn The amount of the input token function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn); struct ExactOutputParams { bytes path; address recipient; uint256 deadline; uint256 amountOut; uint256 amountInMaximum; } /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed) /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata /// @return amountIn The amount of the input token function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn); } /// @title ERC20 rewards /// @author @niera26 /// @notice buy and sell tax on this token with rewardToken as rewards /// @notice source: https://github.com/niera26/erc20-rewards-contracts contract ERC20Rewards is Ownable, ERC20, ERC20Burnable, ReentrancyGuard { using SafeERC20 for IERC20; using SafeERC20 for IERC20Metadata; // ========================================================================= // dependencies. // ========================================================================= ISwapRouter public constant swapRouter = ISwapRouter(0xE592427A0AEce92De3Edee1F18E0157C05861564); IUniswapV2Router02 public constant router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); IERC20Metadata public constant rewardToken = IERC20Metadata(0xFf9Cb08752d3A9Be72DE14CCE63f22FA19c24637); // wTIA // ========================================================================= // rewards management. // ========================================================================= // numerator multiplier so tokenPerShare does not get rounded to 0. uint256 private constant PRECISION = 1e18; // scale factor so reward token scales to 18 decimals. uint256 private immutable SCALE_FACTOR; // the accumulated amount of reward token per share. uint256 private tokenPerShare; // total shares of this token. // (different from total supply because of fees and excluded wallets). uint256 public totalShares; // shareholders record. // (non excluded addresses are updated after they send/receive tokens). mapping(address => Share) private shareholders; struct Share { uint256 amount; // recorded balance after last transfer. uint256 earned; // amount of tokens earned but not claimed yet. uint256 tokenPerShareLast; // token per share value of the last earn occurrence. } // total amount of reward tokens ever claimed by holders. uint256 public totalRewardClaimed; // total amount of reward tokens ever distributed. uint256 public totalRewardDistributed; // amm pair addresses the tranfers from/to are taxed. // (populated with WETH/this token pair address in the constructor). mapping(address => bool) public pairs; // contract addresses that opted in for rewards. mapping(address => bool) public isOptin; // ========================================================================= // reward donations. // ========================================================================= // the number of reward tokens to emit per block. uint256 public rewardTokenPerBlock; // the amout of reward tokens already emitted. uint256 public emittedRewardsAcc; // last block reward tokens has been emitted. uint256 public lastEmittingBlock; // ========================================================================= // operator address. // ========================================================================= // the operator address receive marketing tax and can set non critical // settings. Allows to renounce ownership of critical settings. It is the // same as the owner by default and receive marketing tax. It can: // - update itself. // - set uniswap V3 pool fee setting. // - set the reward token per block rate. address public operator; // ========================================================================= // anti-bot and limitations. // ========================================================================= mapping(address => bool) public isBlacklisted; uint256 public maxWallet = type(uint256).max; // set to 1% in initialize uint256 public startBlock = 0; uint8 public deadBlocks = 1; // ========================================================================= // pool options. // ========================================================================= uint24 public poolFee = 10000; // works for wTIA // ========================================================================= // fees. // ========================================================================= uint24 public constant maxSwapFee = 3000; uint24 public constant maxMarketingFee = 8000; uint24 public constant feeDenominator = 10000; uint24 public buyFee = 500; uint24 public sellFee = 500; uint24 public marketingFee = 8000; // ========================================================================= // events. // ========================================================================= event OptIn(address addr); event OptOut(address addr); event AddToBlacklist(address addr); event RemoveFromBlacklist(address addr); event Claim(address indexed addr, address indexed to, uint256 amount); event Distribute(address indexed addr, uint256 amount); event Sweep(address indexed addr, address indexed token, uint256 amount); // ========================================================================= // modifiers. // ========================================================================= modifier onlyOperator() { require(msg.sender == operator, "!operator"); _; } // ========================================================================= // constructor. // ========================================================================= constructor(string memory name, string memory symbol, uint256 _totalSupply) Ownable(msg.sender) ERC20(name, symbol) { // operator is deployer by default. operator = msg.sender; // set the reward token scale factor. uint8 rewardTokenDecimals = rewardToken.decimals(); require(rewardTokenDecimals <= 18, "reward token decimals must be <= 18"); SCALE_FACTOR = 10 ** (18 - rewardTokenDecimals); // mint total supply to itself. _mint(address(this), _totalSupply * 10 ** decimals()); } // ========================================================================= // exposed contract values. // ========================================================================= /** * Return the remaining rewards === reward balance - emitted rewards. */ function remainingRewards() public view returns (uint256) { return rewardBalance() - emittedRewards(); } /** * Return the reward balance === balance - what's remaining to claim. * * It is the amount that can be emitted in total. */ function rewardBalance() public view returns (uint256) { uint256 amountToClaim = totalRewardDistributed - totalRewardClaimed; return rewardToken.balanceOf(address(this)) - amountToClaim; } /** * Return the amount of emitted reward since the last block rewards has * been emitted, according to the reward token per block. */ function emittedRewards() public view returns (uint256) { if (lastEmittingBlock == 0) return 0; if (rewardTokenPerBlock == 0) return 0; uint256 balance = rewardBalance(); if (balance == 0) return 0; uint256 emitted = emittedRewardsAcc + (rewardTokenPerBlock * (block.number - lastEmittingBlock)); return emitted < balance ? emitted : balance; } /** * Return the amount of reward tokens the given address can claim. */ function pendingRewards(address addr) external view returns (uint256) { return _pendingRewards(shareholders[addr]); } // ========================================================================= // exposed user functions. // ========================================================================= /** * Claim reward tokens and send them to given address. */ function claim(address to) external nonReentrant { Share storage share = shareholders[msg.sender]; _earn(share); uint256 amountToClaim = share.earned; if (amountToClaim == 0) return; share.earned = 0; totalRewardClaimed += amountToClaim; rewardToken.safeTransfer(to, amountToClaim); emit Claim(msg.sender, to, amountToClaim); } /** * Create a pair between this token and the given token. */ function createAmmPairWith(address token) public { IUniswapV2Factory factory = IUniswapV2Factory(router.factory()); address pair = factory.createPair(token, address(this)); pairs[pair] = true; } /** * Register an existing pair between this token and the given token. */ function recordAmmPairWith(address token) public { IUniswapV2Factory factory = IUniswapV2Factory(router.factory()); address pair = factory.getPair(token, address(this)); pairs[pair] = true; } /** * Optin for rewards when you are excluded from rewards (contracts). */ function rewardOptin() external { _includeToRewards(msg.sender); isOptin[msg.sender] = true; emit OptIn(msg.sender); } /** * Optout for rewards when you are included to rewards (contracts). */ function rewardOptout() external { _removeFromRewards(msg.sender); isOptin[msg.sender] = false; emit OptOut(msg.sender); } /** * Swap the collected tax to ETH. * * Pass minimal expected amount to prevent slippage/frontrun. */ function swapCollectedTax(uint256 amountOutMin) public { // return if no tax collected. uint256 amountIn = balanceOf(address(this)); if (amountIn == 0) return; // swap tax to eth. uint256 collectedEth = _swapTokenToETHV2(address(this), amountIn, amountOutMin); // collect marketing tax. uint256 marketingAmount = (collectedEth * marketingFee) / feeDenominator; if (marketingAmount > 0) { payable(operator).transfer(marketingAmount); } } /** * Distribute reward token. * * Pass minimal expected amount to prevent slippage/frontrun. */ function distribute(uint256 amountOutMinimum) public { if (totalShares == 0) return; // distribute the rewards that was emitted since last update. uint256 amountToDistribute = emittedRewards(); // swap eth balance to reward token and add it to amount to distribute. uint256 amountIn = address(this).balance; if (amountIn > 0) { amountToDistribute += _swapETHToRewardV3(address(this), amountIn, amountOutMinimum); } // stop when no rewards. if (amountToDistribute == 0) return; // distribute rewards. tokenPerShare += (amountToDistribute * SCALE_FACTOR * PRECISION) / totalShares; totalRewardDistributed += amountToDistribute; // reset emitted rewards. emittedRewardsAcc = 0; lastEmittingBlock = block.number; emit Distribute(msg.sender, amountToDistribute); } /** * Sweep any other ERC20 mistakenly sent to this contract. */ function sweep(IERC20 otherToken) external { require(address(otherToken) != address(this), "!sweep"); require(address(otherToken) != address(rewardToken), "!sweep"); uint256 amount = otherToken.balanceOf(address(this)); otherToken.safeTransfer(msg.sender, amount); emit Sweep(msg.sender, address(otherToken), amount); } //Failsafe for stuck Ethereum on Contract function withdrawEthereum(address payable to, uint256 amount) external onlyOwner { require(to != address(0), "Invalid address"); require(amount <= address(this).balance, "Insufficient balance"); // Transfer the specified amount of Ethereum to the given address (bool sent, ) = to.call{value: amount}(""); require(sent, "Failed to send Ethereum"); } // ========================================================================= // exposed admin functions. // ========================================================================= /** * Send initial allocations before trading started. */ function allocate(address to, uint256 amount) external onlyOwner { require(startBlock == 0, "!initialized"); this.transfer(to, amount); } /** * Remove max wallet limits, one shoot. */ function removeLimits() external onlyOwner { maxWallet = type(uint256).max; } /** * @notice Sets the maximum wallet holding percentage. * @param maxWalletPercent The maximum wallet holding percentage. */ function setMaxWalletPercent(uint256 maxWalletPercent) external onlyOwner { require(maxWalletPercent > 0, "Max wallet percent must be greater than 0"); require(maxWalletPercent <= 100, "Max wallet percent must not exceed 100"); uint256 newMaxWallet = (totalSupply() * maxWalletPercent) / 100; maxWallet = newMaxWallet; emit MaxWalletUpdated(newMaxWallet); } event MaxWalletUpdated(uint256 newMaxWallet); function getMaxWalletPercentage() public view returns (uint256) { if (totalSupply() == 0) return 0; return (maxWallet * 100) / totalSupply(); } /** * Set the fees. */ function setFee(uint24 _buyFee, uint24 _sellFee, uint24 _marketingFee) external onlyOwner { require(_buyFee <= maxSwapFee, "!buyFee"); require(_sellFee <= maxSwapFee, "!sellFee"); require(_marketingFee <= maxMarketingFee, "!marketingFee"); buyFee = _buyFee; sellFee = _sellFee; marketingFee = _marketingFee; } /** * Remove the given address from the blacklist. */ function removeFromBlacklist(address addr) external onlyOwner { _removeFromBlacklist(addr); } /** * Initialize the trading with the given eth and this contract balance. * * Starts trading, sets max wallet to 1% of the supply, create the uniswap V2 pair * with ETH, adds liquidity. * * LP tokens are sent to owner. */ function initialize() external payable onlyOwner { require(msg.value > 0, "!liquidity"); require(startBlock == 0, "!initialized"); // start deadblocks from there. startBlock = block.number; // init max wallet to 1%. maxWallet = totalSupply() / 100; // the all balance will be put in the LP. uint256 balance = balanceOf(address(this)); // create an amm pair with WETH. // as a contract, pair is automatically excluded from rewards. createAmmPairWith(router.WETH()); // approve router to use total balance. _approve(address(this), address(router), balance); // add liquidity and send LP to owner. router.addLiquidityETH{value: msg.value}(address(this), balance, 0, 0, msg.sender, block.timestamp); } // ========================================================================= // exposed operator functions. // ========================================================================= /** * Operator can update itself. */ function setOperator(address _operator) external onlyOperator { require(address(0) != _operator, "!address"); operator = _operator; } /** * Set the uniswap V3 pool fee. */ function setPoolFee(uint24 _poolFee) external onlyOperator { poolFee = _poolFee; } /** * Set the reward token per block. Accumulates the emitted rewards until this * block before updating the value. */ function setRewardTokenPerBlock(uint256 _rewardTokenPerBlock) external onlyOperator { emittedRewardsAcc = emittedRewards(); rewardTokenPerBlock = _rewardTokenPerBlock; lastEmittingBlock = block.number; } /** * Set the reward token per block without accumulating what has been * emitted. Fallback is case of an error. */ function setRewardTokenPerBlockUnsafe(uint256 _rewardTokenPerBlock) external onlyOperator { rewardTokenPerBlock = _rewardTokenPerBlock; } /** * Empty the emitted rewards. Fallback in case of error. */ function resetEmittedRewardsUnsafe() external onlyOperator { emittedRewardsAcc = 0; } // ========================================================================= // internal functions. // ========================================================================= /** * Return whether current block is a dead block (= blacklisted when buying in a dead block). */ function _isDeadBlock() private view returns (bool) { return block.number <= startBlock + deadBlocks; } /** * Return addresses excluded from max wallet limit (= this contract, router or pairs). * * Blacklisted addresses are excluded too so they can buy as much as they want. */ function _isExcludedFromMaxWallet(address addr) private view returns (bool) { return address(this) == addr || address(router) == addr || pairs[addr] || isBlacklisted[addr]; } /** * Return adresses excluded from taxes (= this contract or router). */ function _isExcludedFromTaxes(address addr) private view returns (bool) { return address(this) == addr || address(router) == addr; } /** * Retrun addresses excluded from rewards. * * - addresses of contracts that didn't opted in for rewards. * - blacklisted addresses. * - zero address to save gas on mint/burn (its balance is always 0 so it would never get shares anyway) * - this contract address is removed too because address(this).code.length == 0 in the constructor. * - remove dead address because people are used to it. */ function _isExcludedFromRewards(address addr) private view returns (bool) { return address(0) == addr || address(this) == addr || (addr.code.length > 0 && !isOptin[addr]) || isBlacklisted[addr] || 0x000000000000000000000000000000000000dEaD == addr; } /** * Add the given address to blacklist. */ function _addToBlacklist(address addr) private { _removeFromRewards(addr); isBlacklisted[addr] = true; emit AddToBlacklist(addr); } /** * Remove the given address from blacklist. */ function _removeFromBlacklist(address addr) private { _includeToRewards(addr); isBlacklisted[addr] = false; emit RemoveFromBlacklist(addr); } /** * Include the given address to rewards. Should only concern: * * - addresses of contracts opting in for rewards. * - addresses being removed from blacklist. */ function _includeToRewards(address addr) private { // ensure we dont update total shares twice. if (!_isExcludedFromRewards(addr)) return; // update total shares. uint256 balance = balanceOf(addr); totalShares += balance; // restart earning from now. Share storage share = shareholders[addr]; share.amount = balance; share.tokenPerShareLast = tokenPerShare; } /** * Remove the given address from rewards. Should only concern: * * - addresses of contracts opting out of rewards. * - addresses being added to blacklist. */ function _removeFromRewards(address addr) private { // ensure we dont update total shares twice. if (_isExcludedFromRewards(addr)) return; // update total shares. totalShares -= balanceOf(addr); // make sure pending rewards are earned and stop earning (share.amount = 0) Share storage share = shareholders[addr]; _earn(share); share.amount = 0; } /** * Compute the pending rewards of the given share. * * The rewards earned since the last transfer are added to the already earned * rewards. */ function _pendingRewards(Share memory share) private view returns (uint256) { uint256 RDiff = tokenPerShare - share.tokenPerShareLast; uint256 earned = (share.amount * RDiff) / (SCALE_FACTOR * PRECISION); return share.earned + earned; } /** * Earn the rewards of the given share. */ function _earn(Share storage share) private { uint256 pending = _pendingRewards(share); share.earned = pending; share.tokenPerShareLast = tokenPerShare; } /** * Override the update method in order to take fee when transfer is from/to * a registered amm pair. * * - transfers from/to registered pairs are taxed. * - addresses buying in a deadblock are blacklisted and cant transfer tokens anymore. * - prevents receiving address to get more than max wallet. * - taxed tokens are sent to this very contract. * - on a taxed sell, the collected tax is swapped for eth. * - updates the shares of both the from and to addresses. */ function _update(address from, address to, uint256 amount) internal override { // blacklisted addresses cant transfer tokens. require(!isBlacklisted[from], "blacklisted"); // check if it is a taxed buy or sell. bool isTaxedBuy = pairs[from] && !_isExcludedFromTaxes(to); bool isTaxedSell = !_isExcludedFromTaxes(from) && pairs[to]; // take the fee if it is a buy or sell. uint256 fee = (isTaxedBuy ? buyFee : 0) + (isTaxedSell ? sellFee : 0); uint256 taxAmount = (amount * fee) / feeDenominator; uint256 actualTransferAmount = amount - taxAmount; // add to blacklist while buying in dead block. if (isTaxedBuy && _isDeadBlock()) { _addToBlacklist(to); } // prevents max wallet for regular addresses. if (!_isExcludedFromMaxWallet(to)) { require(actualTransferAmount + balanceOf(to) <= maxWallet, "!maxWallet"); } // transfer the tax to this contract if any. if (taxAmount > 0) { super._update(from, address(this), taxAmount); } // swaps the tax to eth if it is a taxed sell. if (isTaxedSell) { swapCollectedTax(0); } // transfer the actual amount. super._update(from, to, actualTransferAmount); // updates shareholders values. _updateShare(from); _updateShare(to); } /** * Update the total shares and the shares of the given address if it is not * excluded from rewards. * * Earn first with his current share amount then update shares according to * its new balance. */ function _updateShare(address addr) private { if (_isExcludedFromRewards(addr)) return; uint256 balance = balanceOf(addr); Share storage share = shareholders[addr]; totalShares = totalShares - share.amount + balance; _earn(share); share.amount = balance; } /** * Swap amount of this token for ETH to address and return the amount received. */ function _swapTokenToETHV2(address to, uint256 amountIn, uint256 amountOutMin) private returns (uint256) { // return 0 if no amount given. if (amountIn == 0) return 0; // approve router to spend tokens. _approve(address(this), address(router), amountIn); // swap the whole amount to eth. address[] memory path = new address[](2); path[0] = address(this); path[1] = router.WETH(); uint256 originalETHbalance = address(this).balance; router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountIn, amountOutMin, path, to, block.timestamp); return address(this).balance - originalETHbalance; } /** * Swap amount of ETH for reward tokens to address and return the amount received. */ function _swapETHToRewardV3(address to, uint256 amountIn, uint256 amountOutMinimum) private returns (uint256) { // return 0 if no amount given. if (amountIn == 0) return 0; // build the swap parameter. ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams({ tokenIn: router.WETH(), tokenOut: address(rewardToken), fee: poolFee, recipient: to, deadline: block.timestamp, amountIn: amountIn, amountOutMinimum: amountOutMinimum, sqrtPriceLimitX96: 0 }); // execute the swap and return the number of received tokens. return swapRouter.exactInputSingle{value: amountIn}(params); } receive() external payable {} } /** * Useful Links: * * Website: https://trestleprotocol.io * X: https://x.com/trestleprotocol * * $Trestle holders receive $wTIA * * */ /// @title Trestle /// @notice buy and sell tax on this token with rewardToken as wTIA contract Trestle is ERC20Rewards { constructor() ERC20Rewards("Trestle", "TRESTLE", 1e9) {} }
{ "optimizer": { "enabled": true, "runs": 1000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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Contract Creation Code
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