Contract

0x4461913eCa88EDE2d76B576C8fA5D08535bb714A

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From
To
Burn Chip20085312024-12-30 15:42:204 hrs ago1735573340IN
0x4461913e...535bb714A
0 S0.000063851.1
Mint Chip19910462024-12-30 12:40:017 hrs ago1735562401IN
0x4461913e...535bb714A
0 S0.000089651.1
Burn Chip19435342024-12-30 0:01:2220 hrs ago1735516882IN
0x4461913e...535bb714A
0 S0.000087861.11
Burn Chip19435262024-12-30 0:01:1820 hrs ago1735516878IN
0x4461913e...535bb714A
0 S0.000087861.11
Burn Chip19435262024-12-30 0:01:1820 hrs ago1735516878IN
0x4461913e...535bb714A
0 S0.000087861.11
Burn Chip19435032024-12-30 0:01:0420 hrs ago1735516864IN
0x4461913e...535bb714A
0 S0.000067931.11
Burn Chip19434972024-12-30 0:00:5620 hrs ago1735516856IN
0x4461913e...535bb714A
0 S0.000067911.11
Burn Chip19434972024-12-30 0:00:5620 hrs ago1735516856IN
0x4461913e...535bb714A
0 S0.000087861.11
Burn Chip19434752024-12-30 0:00:4020 hrs ago1735516840IN
0x4461913e...535bb714A
0 S0.000087861.11
Burn Chip19434752024-12-30 0:00:4020 hrs ago1735516840IN
0x4461913e...535bb714A
0 S0.000067931.11
Burn Chip19433082024-12-29 23:58:1920 hrs ago1735516699IN
0x4461913e...535bb714A
0 S0.000087841.11
Burn Chip19429112024-12-29 23:53:0120 hrs ago1735516381IN
0x4461913e...535bb714A
0 S0.000082661.1
Burn Chip19429032024-12-29 23:52:5220 hrs ago1735516372IN
0x4461913e...535bb714A
0 S0.000082671.1
Mint Chip19399722024-12-29 22:59:5121 hrs ago1735513191IN
0x4461913e...535bb714A
0 S0.000089941.11
Mint Chip19399602024-12-29 22:59:3621 hrs ago1735513176IN
0x4461913e...535bb714A
0 S0.000089911.11
Mint Chip19399532024-12-29 22:59:2621 hrs ago1735513166IN
0x4461913e...535bb714A
0 S0.000304683.55
Mint Chip19399522024-12-29 22:59:2621 hrs ago1735513166IN
0x4461913e...535bb714A
0 S0.000304683.55
Burn Chip19395432024-12-29 22:52:0621 hrs ago1735512726IN
0x4461913e...535bb714A
0 S0.000063861.1
Burn Chip19395342024-12-29 22:51:5221 hrs ago1735512712IN
0x4461913e...535bb714A
0 S0.000087831.11
Mint Chip19391012024-12-29 22:42:3521 hrs ago1735512155IN
0x4461913e...535bb714A
0 S0.000089891.11
Mint Chip19390952024-12-29 22:42:3121 hrs ago1735512151IN
0x4461913e...535bb714A
0 S0.000095261.11
Burn Chip19380982024-12-29 22:24:1821 hrs ago1735511058IN
0x4461913e...535bb714A
0 S0.000082671.1
Burn Chip19380922024-12-29 22:24:1121 hrs ago1735511051IN
0x4461913e...535bb714A
0 S0.000082671.1
Mint Chip19288702024-12-29 19:40:1524 hrs ago1735501215IN
0x4461913e...535bb714A
0 S0.000089631.1
Burn Chip19277842024-12-29 19:17:5225 hrs ago1735499872IN
0x4461913e...535bb714A
0 S0.00006731.1
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Latest 1 internal transaction

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10227722024-12-21 11:39:149 days ago1734781154  Contract Creation0 S
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x0e7a7a47...9372a70Fc
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
EngineChip

Compiler Version
v0.8.24+commit.e11b9ed9

Optimization Enabled:
Yes with 200 runs

Other Settings:
paris EvmVersion
File 1 of 20 : EngineChip.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

import "../../interfaces/IPoolMintControllerV1.sol";
import "../../interfaces/IPoolBurnControllerV1.sol";
import "../../interfaces/IBurnHandlerV1.sol";

import "../../../AdministrationContracts/ClaimableAdmin.sol";

import "../BaseChip.sol";

/**
 * @title EngineChip
 * @notice EngineChip is a ERC20 token that functions as a chip for ERC20 tokens that exist in the engin chain
 */
contract EngineChip is ClaimableAdmin, ERC20, ReentrancyGuard, BaseChip {
  using SafeERC20 for IERC20;
  using SafeERC20 for ERC20;

  // ***** Events *****

  event IsMintingPausedSet(bool indexed value);

  event BurnHandlerSet(
    address indexed previousHandler,
    address indexed handler
  );

  event MintControllerSet(
    address indexed previousController,
    address indexed newController
  );
  event BurnControllerSet(
    address indexed previousController,
    address indexed newController
  );

  event TokensSwept(
    address indexed token,
    address indexed receiver,
    uint256 amount
  );

  event ChipMinted(
    address indexed minter,
    address indexed to,
    uint256 underlyingAmount,
    uint256 amount
  );
  event ChipBurned(
    address indexed burner,
    address indexed receiver,
    uint256 underlyingAmount,
    uint256 amount
  );

  // ***** Constants *****

  uint public constant SELF_UNIT_SCALE = 1e18;

  // ***** Storage *****

  IERC20 public immutable underlyingToken;

  uint256 public immutable exchangeRate;

  IBurnHandlerV1 public burnHandler;

  bool public isMintingPaused;

  IPoolMintControllerV1 public mintController;
  IPoolBurnControllerV1 public burnController;

  // ***** Constructor *****

  constructor(
    IRegistryV1 _registry,
    string memory _name,
    string memory _symbol,
    IERC20 _underlyingToken,
    address _initialAdmin
  ) ERC20(_name, _symbol) BaseChip(_registry, ChipMode.LOCAL) {
    require(address(_underlyingToken) != address(0), "!_underlyingToken");
    underlyingToken = _underlyingToken;

    uint underlyingDecimals = ERC20(address(_underlyingToken)).decimals();
    exchangeRate = 10 ** underlyingDecimals;

    admin = _initialAdmin;
    emit NewAdmin(address(0), _initialAdmin);
  }

  // ***** Admin Functions *****

  /**
   * @notice Set the auto approved spender for a role
   * @param role The role to set the spender for
   * @param spender The spender to set
   */
  function setAutoApprovedSpenderForRole(
    string calldata role,
    address spender
  ) external onlyAdmin {
    setAutoApprovedSpenderForRoleInternal(role, spender);
  }

  /**
   * @notice Set the burn handler for the pool
   * @param _handler The new burn handler
   */
  function setBurnHandler(IBurnHandlerV1 _handler) external onlyAdmin {
    require(
      address(_handler) == address(0) ||
        registry.validBurnHandlerForChip(address(this)) == address(_handler),
      "NOT_REGISTRY_APPROVED"
    );

    address previousHandler = address(burnHandler);

    require(previousHandler != address(_handler), "ALREADY_SET");

    burnHandler = _handler;
    emit BurnHandlerSet(previousHandler, address(_handler));
  }

  /**
   * @notice Set the minting pause state
   * @param _value The new minting pause state
   */
  function setIsMintingPaused(bool _value) external onlyAdmin {
    require(isMintingPaused != _value, "ALREADY_SET");

    isMintingPaused = _value;
    emit IsMintingPausedSet(_value);
  }

  /**
   * @notice Set the mint controller for the pool
   * @param _mintController The new mint controller
   */
  function setMintController(
    IPoolMintControllerV1 _mintController
  ) external onlyAdmin {
    // Sanity
    require(
      address(_mintController) == address(0) ||
        _mintController.isPoolMintController(),
      "NOT_POOL_MINT_CONTROLLER"
    );

    address previousController = address(mintController);

    require(previousController != address(_mintController), "ALREADY_SET");

    mintController = _mintController;

    emit MintControllerSet(previousController, address(_mintController));
  }

  /**
   * @notice Set the burn controller for the pool
   * @param _burnController The new burn controller
   */
  function setBurnController(
    IPoolBurnControllerV1 _burnController
  ) external onlyAdmin {
    // Sanity
    require(
      address(_burnController) == address(0) ||
        _burnController.isPoolBurnController(),
      "NOT_POOL_BURN_CONTROLLER"
    );

    address previousController = address(burnController);

    require(previousController != address(_burnController), "ALREADY_SET");

    burnController = _burnController;

    emit BurnControllerSet(previousController, address(_burnController));
  }

  /**
   * @notice Sweep any non-underlying tokens from the contract
   * @dev Owner can sweep any tokens other than the underlying token
   * @param _token The token to sweep
   * @param _amount The amount to sweep
   */
  function sweepTokens(IERC20 _token, uint256 _amount) external onlyAdmin {
    require(
      address(_token) != address(underlyingToken),
      "CANNOT_SWEEP_UNDERLYING_TOKEN"
    );

    _token.safeTransfer(admin, _amount);

    emit TokensSwept(address(_token), admin, _amount);
  }

  /**
   * @notice Sweep native coin from the contract
   * @dev Owner can sweep any native coin accidentally sent to the contract
   * @param _amount The amount to sweep
   */
  function sweepNative(uint256 _amount) external onlyAdmin {
    payable(admin).transfer(_amount);
  }

  // ***** Local Mint/Burn Functions *****

  /**
   * Mint chips to the given address against underlying tokens taken from the caller
   * @param _toAddress The address to mint the chips to
   * @param _amount The amount of underlying tokens to mint against
   */
  function mintChip(address _toAddress, uint256 _amount) external nonReentrant {
    require(!isMintingPaused, "MINT_PAUSED");
    require(_amount != 0, "AMOUNT_ZERO");

    address minter = msg.sender;

    takeUnderlying(minter, _amount);
    uint ownAmountToMint = underlyingAmountToOwnAmountInternal(_amount);

    IPoolMintControllerV1 _mintController = mintController;
    if (address(_mintController) != address(0)) {
      bool isPermitted = _mintController.informMintRequest(
        minter,
        _toAddress,
        _amount,
        ownAmountToMint
      );
      require(isPermitted, "MINT_CONTROLLER_REFUSAL");
    }

    _mint(_toAddress, ownAmountToMint);

    emit ChipMinted(minter, _toAddress, _amount, ownAmountToMint);
  }

  /**
   * Burn chips from the caller and transfer the underlying tokens to the 'toAddress'
   * @param _receiver The address to receive the underlying tokens
   * @param _amount The amount of chips to burn
   */
  function burnChip(address _receiver, uint256 _amount) external nonReentrant {
    address burner = msg.sender;
    safeBurnInternal(burner, _receiver, _amount);
  }

  /**
   * Burn chips from the caller and transfer the underlying tokens to the 'burnHandler' and calls it's 'handleBurn' function
   * @param _amount The amount of chips to burn
   * @param _payload The payload to pass to the burn handler
   */
  function burnChipAndCall(
    uint256 _amount,
    bytes calldata _payload
  ) external payable nonReentrant {
    require(burnHandler != IBurnHandlerV1(address(0)), "NO_BURN_HANDLER");

    // burn the chips
    address burner = msg.sender;
    uint256 underlyingAmount = safeBurnInternal(
      burner,
      address(burnHandler),
      _amount
    );

    // call the burn handler
    burnHandler.handleBurn{value: msg.value}(
      burner,
      _amount,
      underlyingAmount,
      _payload
    );
  }

  // ***** burn internal Functions *****

  /**
   * Safely burns the chips and transfers the underlying tokens to the receiver
   * @param burner The address of the burner
   * @param receiver The address to receive the underlying tokens
   * @param chipAmount The amount of chips to burn
   * @return underlyingAmount The amount of underlying tokens transferred
   */
  function safeBurnInternal(
    address burner,
    address receiver,
    uint256 chipAmount
  ) internal returns (uint256 underlyingAmount) {
    // sanity
    require(chipAmount != 0, "AMOUNT_ZERO");

    // Convert the chip amount to underlying amount
    underlyingAmount = ownAmountToUnderlyingAmountInternal(chipAmount);

    // sanity
    require(underlyingAmount != 0, "UNDERLYING_AMOUNT_ZERO");

    // Inform the burn controller
    IPoolBurnControllerV1 _burnController = burnController;
    if (address(_burnController) != address(0)) {
      bool isPermitted = _burnController.informBurnRequest(
        burner,
        receiver,
        underlyingAmount,
        chipAmount
      );
      require(isPermitted, "BURN_CONTROLLER_REFUSAL");
    }

    // Burn the chips
    _burn(burner, chipAmount);

    // Transfer the underlying tokens to the receiver
    underlyingToken.safeTransfer(receiver, underlyingAmount);

    // emit event
    emit ChipBurned(burner, receiver, underlyingAmount, chipAmount);
  }

  // ***** ERC20 internal override Functions *****

  /**
   * @notice Uses the base ERC20 logic unless 'spender' is marked as 'autoApproved'
   */
  function allowance(
    address owner,
    address spender
  ) public view virtual override returns (uint256) {
    if (autoApproved[spender]) {
      return type(uint).max;
    } else {
      return ERC20.allowance(owner, spender);
    }
  }

  // ***** Underlying utils *****

  /**
   * Utility function to safely take underlying tokens (ERC20) from a pre-approved account
   * @dev Will revert if the contract will not get the exact 'amount' value
   */
  function takeUnderlying(address from, uint amount) internal {
    uint balanceBefore = underlyingToken.balanceOf(address(this));
    underlyingToken.safeTransferFrom(from, address(this), amount);
    uint balanceAfter = underlyingToken.balanceOf(address(this));
    require(balanceAfter - balanceBefore == amount, "DID_NOT_RECEIVE_EXACT");
  }

  /**
   * Converts the underlying amount to the amount of self tokens by the current exchange rate
   */
  function underlyingAmountToOwnAmountInternal(
    uint256 underlyingAmount
  ) internal view returns (uint256 ownAmount) {
    ownAmount = (underlyingAmount * SELF_UNIT_SCALE) / exchangeRate;
  }

  /**
   * Converts the (self) LP amount to the equal underlying amount by the current exchange rate
   */
  function ownAmountToUnderlyingAmountInternal(
    uint256 ownAmount
  ) internal view returns (uint256 underlyingAmount) {
    underlyingAmount = (ownAmount * exchangeRate) / SELF_UNIT_SCALE;
  }
}

File 2 of 20 : draft-IERC6093.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @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);
}

File 3 of 20 : ERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * 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);
            }
        }
    }
}

File 4 of 20 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.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);
}

File 5 of 20 : IERC20Permit.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @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);
}

File 6 of 20 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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);
}

File 7 of 20 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";

/**
 * @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;
    }
}

File 8 of 20 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

/**
 * @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();
        }
    }
}

File 9 of 20 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

File 10 of 20 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }
}

File 11 of 20 : AcceptableImplementationClaimableAdminStorage.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

contract ClaimableAdminStorage {
  /**
   * @notice Administrator for this contract
   */
  address public admin;

  /**
   * @notice Pending administrator for this contract
   */
  address public pendingAdmin;

  /*** Modifiers ***/

  modifier onlyAdmin() {
    require(msg.sender == admin, "ONLY_ADMIN");
    _;
  }

  /*** Constructor ***/

  constructor() {
    // Set admin to caller
    admin = msg.sender;
  }
}

contract AcceptableImplementationClaimableAdminStorage is
  ClaimableAdminStorage
{
  /**
   * @notice Active logic
   */
  address public implementation;

  /**
   * @notice Pending logic
   */
  address public pendingImplementation;
}

contract AcceptableRegistryImplementationClaimableAdminStorage is
  AcceptableImplementationClaimableAdminStorage
{
  /**
   * @notice System Registry
   */
  address public registry;
}

File 12 of 20 : ClaimableAdmin.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

import "./AcceptableImplementationClaimableAdminStorage.sol";

/**
 * @title Claimable Admin
 */
contract ClaimableAdmin is ClaimableAdminStorage {
  /**
   * @notice Emitted when pendingAdmin is changed
   */
  event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);

  /**
   * @notice Emitted when pendingAdmin is accepted, which means admin is updated
   */
  event NewAdmin(address oldAdmin, address newAdmin);

  /*** Admin Functions ***/

  /**
   * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer.
   * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer.
   * @param newPendingAdmin New pending admin.
   */
  function _setPendingAdmin(address newPendingAdmin) public {
    // Check caller = admin
    require(msg.sender == admin, "Not Admin");

    // Save current value, if any, for inclusion in log
    address oldPendingAdmin = pendingAdmin;

    // Store pendingAdmin with value newPendingAdmin
    pendingAdmin = newPendingAdmin;

    // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin)
    emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin);
  }

  /**
   * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin
   * @dev Admin function for pending admin to accept role and update admin
   */
  function _acceptAdmin() public {
    // Check caller is pendingAdmin and pendingAdmin ≠ address(0)
    require(
      msg.sender == pendingAdmin && pendingAdmin != address(0),
      "Not the EXISTING pending admin"
    );

    // Save current values for inclusion in log
    address oldAdmin = admin;
    address oldPendingAdmin = pendingAdmin;

    // Store admin with value pendingAdmin
    admin = pendingAdmin;

    // Clear the pending value
    pendingAdmin = address(0);

    emit NewAdmin(oldAdmin, admin);
    emit NewPendingAdmin(oldPendingAdmin, pendingAdmin);
  }
}

File 13 of 20 : IContractRegistryBase.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

interface IContractRegistryBase {
  function isImplementationValidForProxy(
    bytes32 proxyNameHash,
    address _implementation
  ) external view returns (bool);
}

File 14 of 20 : BaseChip.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

import {ChipEnumsV1} from "../interfaces/ChipEnumsV1.sol";
import "../interfaces/IRegistryV1.sol";

/**
 * @title BaseChip
 * @notice Base for Chip contracts to inherit from, handles the auto approval mechanism.
 */
contract BaseChip is ChipEnumsV1 {
  // ***** Events *****

  event AutoApprovedSpenderSet(
    string indexed role,
    address indexed oldSpender,
    address indexed newSpender
  );

  // ***** Immutable Storage *****

  IRegistryV1 public immutable registry;
  ChipMode public immutable chipMode;

  // ***** Storage *****

  // address => is auto approved
  mapping(address => bool) public autoApproved;

  // role hash => role address
  mapping(bytes32 => address) public autoApprovedSpendersByRoles;

  // ***** Views *****

  function getAutoApprovedSpenderAddressByRole(
    string calldata role
  ) public view returns (address) {
    bytes32 roleHash = keccak256(abi.encodePacked(role));
    return autoApprovedSpendersByRoles[roleHash];
  }

  // ***** Constructor *****

  constructor(IRegistryV1 _registry, ChipMode _chipMode) {
    require(address(_registry) != address(0), "!_registry");

    registry = _registry;
    chipMode = _chipMode;
  }

  // ***** Admin Functions *****

  function setAutoApprovedSpenderForRoleInternal(
    string calldata role,
    address spender
  ) internal {
    require(
      spender == address(0) ||
        registry.getValidSpenderTargetForChipByRole(address(this), role) ==
        spender,
      "NOT_REGISTRY_APPROVED"
    );

    address oldSpender = getAutoApprovedSpenderAddressByRole(role);

    autoApproved[oldSpender] = false;
    autoApproved[spender] = true;

    bytes32 roleHash = keccak256(abi.encodePacked(role));
    autoApprovedSpendersByRoles[roleHash] = spender;

    emit AutoApprovedSpenderSet(role, oldSpender, spender);
  }
}

File 15 of 20 : ChipEnumsV1.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.24;

contract ChipEnumsV1 {
  enum ChipMode {
    NONE,
    LOCAL,
    REMOTE,
    HYBRID
  }
}

File 16 of 20 : IBurnHandlerV1.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

interface IBurnHandlerV1 {
  function handleBurn(
    address burner,
    uint256 chipAmount,
    uint256 underlyingAmount,
    bytes calldata payload
  ) external payable;
}

File 17 of 20 : IGlobalLock.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

interface IGlobalLock {
  function lock() external;
  function freeLock() external;
}

File 18 of 20 : IPoolBurnControllerV1.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.24;

interface IPoolBurnControllerV1 {
  /**
   * @notice Check if the contract is a PoolBurnController
   */
  function isPoolBurnController() external view returns (bool);

  /**
   * @notice Inform the PoolBurnController of a burn request
   * param _burner The address of the account that is burning the tokens
   * param _receiver The address of the account that will receive the underlying tokens
   * param _underlyingAmount The amount of underlying tokens that will be given for burning
   * param _burnAmount The amount of tokens that will be burned
   */
  function informBurnRequest(
    address _burner,
    address _receiver,
    uint256 _underlyingAmount,
    uint256 _burnAmount
  ) external returns (bool isPermitted);
}

File 19 of 20 : IPoolMintControllerV1.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.24;

interface IPoolMintControllerV1 {
  /**
   * @notice Check if the contract is a PoolMintController
   */
  function isPoolMintController() external view returns (bool);

  /**
   * @notice Inform the PoolMintController of a mint request
   * param _minter The address of the account that is minting the tokens
   * param _to The address of the account that is minting the tokens
   * param _underlyingAmount The amount of underlying tokens that were taken for minting
   * param _mintAmount The amount of tokens that will be minted
   */
  function informMintRequest(
    address _minter,
    address _to,
    uint256 _underlyingAmount,
    uint256 _mintAmount
  ) external returns (bool isPermitted);
}

File 20 of 20 : IRegistryV1.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

import "../../AdministrationContracts/IContractRegistryBase.sol";
import "./IGlobalLock.sol";

interface IRegistryV1Functionality is IContractRegistryBase, IGlobalLock {
  // **** Locking mechanism ****

  function isTradersPortalAndLocker(
    address _address
  ) external view returns (bool);

  function isTriggersAndLocker(address _address) external view returns (bool);

  function isTradersPortalOrTriggersAndLocker(
    address _address
  ) external view returns (bool);
}

interface IRegistryV1 is IRegistryV1Functionality {
  // **** Public Storage params ****

  function feesManagers(address asset) external view returns (address);

  function orderBook() external view returns (address);

  function tradersPortal() external view returns (address);

  function triggers() external view returns (address);

  function tradeIntentsVerifier() external view returns (address);

  function liquidityIntentsVerifier() external view returns (address);

  function chipsIntentsVerifier() external view returns (address);

  function lexProxiesFactory() external view returns (address);

  function chipsFactory() external view returns (address);

  /**
   * @return An array of all supported trading floors
   */
  function getAllSupportedTradingFloors()
    external
    view
    returns (address[] memory);

  /**
   * @return An array of all supported settlement assets
   */
  function getSettlementAssetsForTradingFloor(
    address _tradingFloor
  ) external view returns (address[] memory);

  /**
   * @return The spender role address that is set for this chip
   */
  function getValidSpenderTargetForChipByRole(
    address chip,
    string calldata role
  ) external view returns (address);

  /**
   * @return the address of the valid 'burnHandler' for the chip
   */
  function validBurnHandlerForChip(
    address chip
  ) external view returns (address);

  /**
   * @return The address matching for the given role
   */
  function getDynamicRoleAddress(
    string calldata _role
  ) external view returns (address);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.