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// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

import {Ownable} from "@openzeppelin-contracts/access/Ownable.sol";
import {IERC20Metadata} from "@openzeppelin-contracts/token/ERC20/extensions/IERC20Metadata.sol";

import {AggregatorV3Interface} from "@chainlink-contracts/src/v0.8/shared/interfaces/AggregatorV3Interface.sol";

import {IFeeTokenRegistry} from "./interfaces/IFeeTokenRegistry.sol";

/// @title FeeTokenRegistry
/// @author Otim Labs, Inc.
/// @notice a contract for registering ERC20 fee tokens and using price feeds to convert wei amounts to ERC20 token amounts
contract FeeTokenRegistry is IFeeTokenRegistry, Ownable {
    /// @notice relates a token address to its price feed and decimal information
    mapping(address => FeeTokenData) public feeTokenData;

    constructor(address owner) Ownable(owner) {}

    /// @inheritdoc IFeeTokenRegistry
    function addFeeToken(address token, address priceFeed, uint40 heartbeat) external onlyOwner {
        // basic checks to ensure the token, price feed, and heartbeat are valid
        if (token == address(0) || priceFeed == address(0) || heartbeat == 0) {
            revert InvalidFeeTokenData();
        }

        // ensure the token is not already registered
        if (feeTokenData[token].registered) {
            revert FeeTokenAlreadyRegistered();
        }

        // query the lastest round data from the price feed
        // slither-disable-next-line unused-return
        (uint80 roundId,,, uint256 updatedAt,) = AggregatorV3Interface(priceFeed).latestRoundData();

        // check if the price feed has been initialized
        if (roundId == 0 || updatedAt == 0) {
            revert PriceFeedNotInitialized();
        }

        // query the decimals for the token and price feed
        uint8 tokenDecimals = IERC20Metadata(token).decimals();
        uint8 priceFeedDecimals = AggregatorV3Interface(priceFeed).decimals();

        // store this information in the feeTokenData mapping
        feeTokenData[token] = FeeTokenData(priceFeed, heartbeat, priceFeedDecimals, tokenDecimals, true);

        // emit an event to notify listeners of the new fee token
        emit FeeTokenAdded(token, priceFeed, heartbeat, priceFeedDecimals, tokenDecimals);
    }

    /// @inheritdoc IFeeTokenRegistry
    function removeFeeToken(address token) external onlyOwner {
        // query the fee token data
        FeeTokenData memory data = feeTokenData[token];

        // if the token is not registered, revert
        if (!data.registered) {
            revert FeeTokenNotRegistered();
        }

        // delete the fee token data from the mapping
        delete feeTokenData[token];

        // emit an event to notify listeners of the removed fee token
        emit FeeTokenRemoved(token, data.priceFeed, data.heartbeat, data.priceFeedDecimals, data.tokenDecimals);
    }

    /// @inheritdoc IFeeTokenRegistry
    function weiToToken(address token, uint256 weiAmount) external view override returns (uint256) {
        // query the fee token data
        FeeTokenData memory data = feeTokenData[token];

        // if the token is not registered, revert
        if (!data.registered) {
            revert FeeTokenNotRegistered();
        }

        // query the latest price from the price feed
        // slither-disable-next-line unused-return
        (, int256 latestPrice,, uint256 updatedAt,) = AggregatorV3Interface(data.priceFeed).latestRoundData();

        // if the latest price is zero or negative, revert
        if (latestPrice <= 0) {
            revert InvalidPrice();
        }

        // if the price feed is stale, revert
        if (block.timestamp - updatedAt > data.heartbeat) {
            revert StalePrice();
        }

        // collect the number of decimals for the token and price feed
        uint8 decimals = data.priceFeedDecimals + data.tokenDecimals;

        // adjust the tokenAmount based on the number of decimals.
        // we must divide by 10 ** 18 at some point since the price is given in ether
        // so we adjust the tokenAmount based on the difference in decimals
        if (decimals < 18) {
            return weiAmount / 10 ** (18 - decimals) / uint256(latestPrice);
        } else {
            return weiAmount * 10 ** (decimals - 18) / uint256(latestPrice);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity >=0.6.2;

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

/**
 * @dev Interface for the optional metadata functions from the ERC-20 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);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// solhint-disable-next-line interface-starts-with-i
interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

  function getRoundData(
    uint80 _roundId
  ) external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);

  function latestRoundData()
    external
    view
    returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

/// @title FeeTokenRegistry
/// @author Otim Labs, Inc.
/// @notice interface for the FeeTokenRegistry contract
interface IFeeTokenRegistry {
    /// @notice fee token data struct
    /// @param priceFeed - a price feed of the form <token>/ETH
    /// @param heartbeat - the time in seconds between price feed updates
    /// @param priceFeedDecimals - the number of decimals for the price feed
    /// @param tokenDecimals - the number of decimals for the token
    /// @param registered - whether the token is registered
    struct FeeTokenData {
        address priceFeed;
        uint40 heartbeat;
        uint8 priceFeedDecimals;
        uint8 tokenDecimals;
        bool registered;
    }

    /// @notice emitted when a fee token is added
    event FeeTokenAdded(
        address indexed token, address indexed priceFeed, uint40 heartbeat, uint8 priceFeedDecimals, uint8 tokenDecimals
    );
    /// @notice emitted when a fee token is removed
    event FeeTokenRemoved(
        address indexed token, address indexed priceFeed, uint40 heartbeat, uint8 priceFeedDecimals, uint8 tokenDecimals
    );

    error InvalidFeeTokenData();
    error PriceFeedNotInitialized();
    error FeeTokenAlreadyRegistered();
    error FeeTokenNotRegistered();
    error InvalidPrice();
    error StalePrice();

    /// @notice adds a fee token to the registry
    /// @param token - the ERC20 token address
    /// @param priceFeed - the price feed address
    /// @param heartbeat - the time in seconds between price feed updates
    function addFeeToken(address token, address priceFeed, uint40 heartbeat) external;

    /// @notice removes a fee token from the registry
    /// @param token - the ERC20 token address
    function removeFeeToken(address token) external;

    /// @notice converts a wei amount to a token amount
    /// @param token - the ERC20 token address to convert to
    /// @param weiAmount - the amount of wei to convert
    /// @return tokenAmount - converted token amount
    function weiToToken(address token, uint256 weiAmount) external view returns (uint256);
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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);
}

{
  "remappings": [
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    "@openzeppelin-contracts/=dependencies/@openzeppelin-contracts-5.4.0/",
    "@openzeppelin/contracts/=dependencies/@openzeppelin-contracts-5.4.0/",
    "@uniswap-universal-router/=dependencies/@uniswap-universal-router-2.0.0/",
    "@uniswap-v3-core/=dependencies/@uniswap-v3-core-1.0.2-solc-0.8-simulate/",
    "@uniswap-v3-periphery/=dependencies/@uniswap-v3-periphery-1.4.4/",
    "forge-std/=dependencies/forge-std-1.10.0/",
    "@openzeppelin-contracts-5.4.0/=dependencies/@openzeppelin-contracts-5.4.0/",
    "@uniswap-universal-router-2.0.0/=dependencies/@uniswap-universal-router-2.0.0/",
    "@uniswap-v3-core-1.0.2-solc-0.8-simulate/=dependencies/@uniswap-v3-core-1.0.2-solc-0.8-simulate/contracts/",
    "@uniswap-v3-periphery-1.4.4/=dependencies/@uniswap-v3-periphery-1.4.4/contracts/",
    "@uniswap/=dependencies/@uniswap-v3-periphery-1.4.4/node_modules/@uniswap/",
    "ds-test/=dependencies/@uniswap-universal-router-2.0.0/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=dependencies/@uniswap-universal-router-2.0.0/lib/v4-periphery/lib/v4-core/lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-gas-snapshot/=dependencies/@uniswap-universal-router-2.0.0/lib/permit2/lib/forge-gas-snapshot/src/",
    "forge-std-1.10.0/=dependencies/forge-std-1.10.0/src/",
    "openzeppelin-contracts/=dependencies/@uniswap-universal-router-2.0.0/lib/permit2/lib/openzeppelin-contracts/",
    "permit2/=dependencies/@uniswap-universal-router-2.0.0/lib/permit2/",
    "smartcontractkit-chainlink-2.25.0/=dependencies/smartcontractkit-chainlink-2.25.0/",
    "solmate/=dependencies/@uniswap-universal-router-2.0.0/lib/solmate/src/",
    "v3-periphery/=dependencies/@uniswap-universal-router-2.0.0/lib/v3-periphery/contracts/",
    "v4-core/=dependencies/@uniswap-universal-router-2.0.0/lib/v4-periphery/lib/v4-core/src/",
    "v4-periphery/=dependencies/@uniswap-universal-router-2.0.0/lib/v4-periphery/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": false
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false
}

[{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"FeeTokenAlreadyRegistered","type":"error"},{"inputs":[],"name":"FeeTokenNotRegistered","type":"error"},{"inputs":[],"name":"InvalidFeeTokenData","type":"error"},{"inputs":[],"name":"InvalidPrice","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[],"name":"PriceFeedNotInitialized","type":"error"},{"inputs":[],"name":"StalePrice","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"priceFeed","type":"address"},{"indexed":false,"internalType":"uint40","name":"heartbeat","type":"uint40"},{"indexed":false,"internalType":"uint8","name":"priceFeedDecimals","type":"uint8"},{"indexed":false,"internalType":"uint8","name":"tokenDecimals","type":"uint8"}],"name":"FeeTokenAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"priceFeed","type":"address"},{"indexed":false,"internalType":"uint40","name":"heartbeat","type":"uint40"},{"indexed":false,"internalType":"uint8","name":"priceFeedDecimals","type":"uint8"},{"indexed":false,"internalType":"uint8","name":"tokenDecimals","type":"uint8"}],"name":"FeeTokenRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"priceFeed","type":"address"},{"internalType":"uint40","name":"heartbeat","type":"uint40"}],"name":"addFeeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"feeTokenData","outputs":[{"internalType":"address","name":"priceFeed","type":"address"},{"internalType":"uint40","name":"heartbeat","type":"uint40"},{"internalType":"uint8","name":"priceFeedDecimals","type":"uint8"},{"internalType":"uint8","name":"tokenDecimals","type":"uint8"},{"internalType":"bool","name":"registered","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"removeFeeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"weiAmount","type":"uint256"}],"name":"weiToToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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0000000000000000000000006233f5cc17b870ed8921095b67e176dee886ae94

-----Decoded View---------------
Arg [0] : owner (address): 0x6233F5cc17B870ed8921095b67e176DEE886aE94

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000006233f5cc17b870ed8921095b67e176dee886ae94