Address Details
contract

0xbC75342726648c4798543bac986c529f54220953

Contract Name
FeeCurrencyWhitelist
Creator
0xf3eb91–a79239 at 0xcad17a–ee5db4
Balance
0 CELO ( )
Locked CELO Balance
0.00 CELO
Voting CELO Balance
0.00 CELO
Pending Unlocked Gold
0.00 CELO
Tokens
Fetching tokens...
Transactions
0 Transactions
Transfers
0 Transfers
Gas Used
Fetching gas used...
Last Balance Update
24939280
This contract has been verified via Sourcify. View contract in Sourcify repository
Contract name:
FeeCurrencyWhitelist




Optimization enabled
false
Compiler version
v0.5.13+commit.5b0b510c




EVM Version
istanbul




Verified at
2023-10-02T18:32:31.197869Z

project:/contracts/common/FeeCurrencyWhitelist.sol

pragma solidity ^0.5.13;

import "openzeppelin-solidity/contracts/ownership/Ownable.sol";

import "./interfaces/IFeeCurrencyWhitelist.sol";

import "../common/Initializable.sol";

import "../common/interfaces/ICeloVersionedContract.sol";

/**
 * @title Holds a whitelist of the ERC20+ tokens that can be used to pay for gas
 * Not including the native Celo token
 */
contract FeeCurrencyWhitelist is
  IFeeCurrencyWhitelist,
  Ownable,
  Initializable,
  ICeloVersionedContract
{
  // Array of all the tokens enabled
  address[] public whitelist;

  event FeeCurrencyWhitelisted(address token);

  event FeeCurrencyWhitelistRemoved(address token);

  /**
   * @notice Sets initialized == true on implementation contracts
   * @param test Set to true to skip implementation initialization
   */
  constructor(bool test) public Initializable(test) {}

  /**
   * @notice Used in place of the constructor to allow the contract to be upgradable via proxy.
   */
  function initialize() external initializer {
    _transferOwnership(msg.sender);
  }

  /**
   * @notice Returns the storage, major, minor, and patch version of the contract.
   * @return Storage version of the contract.
   * @return Major version of the contract.
   * @return Minor version of the contract.
   * @return Patch version of the contract.
   */
  function getVersionNumber() external pure returns (uint256, uint256, uint256, uint256) {
    return (1, 1, 1, 0);
  }

  /**
   * @notice Removes a Mento token as enabled fee token. Tokens added with addToken should be 
   * removed with this function.
   * @param tokenAddress The address of the token to remove.
   * @param index The index of the token in the whitelist array.
   */
  function removeToken(address tokenAddress, uint256 index) public onlyOwner {
    require(whitelist[index] == tokenAddress, "Index does not match");
    uint256 length = whitelist.length;
    whitelist[index] = whitelist[length - 1];
    whitelist.pop();
    emit FeeCurrencyWhitelistRemoved(tokenAddress);
  }

  /**
   * @dev Add a token to the whitelist
   * @param tokenAddress The address of the token to add.
   */
  function addToken(address tokenAddress) external onlyOwner {
    whitelist.push(tokenAddress);
    emit FeeCurrencyWhitelisted(tokenAddress);
  }

  /**
   * @return a list of all tokens enabled as gas fee currency.
   */
  function getWhitelist() external view returns (address[] memory) {
    return whitelist;
  }
}

/contracts/GSN/Context.sol

pragma solidity ^0.5.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN 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.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

/contracts/ownership/Ownable.sol

pragma solidity ^0.5.0;

import "../GSN/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * 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.
 */
contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _owner;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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 onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

/contracts/common/Initializable.sol

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.5.13 <0.9.0;

contract Initializable {
  bool public initialized;

  constructor(bool testingDeployment) public {
    if (!testingDeployment) {
      initialized = true;
    }
  }

  modifier initializer() {
    require(!initialized, "contract already initialized");
    initialized = true;
    _;
  }
}

/contracts/common/interfaces/ICeloVersionedContract.sol

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.5.13 <0.9.0;

interface ICeloVersionedContract {
  /**
   * @notice Returns the storage, major, minor, and patch version of the contract.
    * @return Storage version of the contract.
    * @return Major version of the contract.
    * @return Minor version of the contract.
    * @return Patch version of the contract.
   */
  function getVersionNumber() external pure returns (uint256, uint256, uint256, uint256);
}

/contracts/common/interfaces/IFeeCurrencyWhitelist.sol

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.5.13 <0.9.0;

interface IFeeCurrencyWhitelist {
  function addToken(address) external;
  function getWhitelist() external view returns (address[] memory);
}

Compiler Settings

{"remappings":[],"optimizer":{"runs":200,"enabled":false},"metadata":{"useLiteralContent":true},"libraries":{},"evmVersion":"istanbul","compilationTarget":{"project:/contracts/common/FeeCurrencyWhitelist.sol":"FeeCurrencyWhitelist"}}

Contract ABI

[{"type":"constructor","stateMutability":"nonpayable","payable":false,"inputs":[{"type":"bool","name":"test","internalType":"bool"}]},{"type":"event","name":"FeeCurrencyWhitelistRemoved","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"FeeCurrencyWhitelisted","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"addToken","inputs":[{"type":"address","name":"tokenAddress","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"pure","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"}],"name":"getVersionNumber","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address[]","name":"","internalType":"address[]"}],"name":"getWhitelist","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"initialize","inputs":[],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"initialized","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isOwner","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"removeToken","inputs":[{"type":"address","name":"tokenAddress","internalType":"address"},{"type":"uint256","name":"index","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"renounceOwnership","inputs":[],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"whitelist","inputs":[{"type":"uint256","name":"","internalType":"uint256"}],"constant":true}]

Contract Creation Code

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Deployed ByteCode

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