Contract 0x253056bd76138baE2Fb2A27afFD385e170CB3eeE

 
 
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0x8f54a651f4092e51d29e2493ced2d9fcb56448f2e815cf8469aafe8bba02b9edAdd Tokens301376132022-06-29 13:15:061 day 22 hrs ago0x38d6396ac0373f2a40c6a26e21da20daa24e426e IN  0x253056bd76138bae2fb2a27affd385e170cb3eee0 MATIC0.288888133061 31.36879239
0x28d970067af6f3ccf50910b8d246a25a8436e2afba39e1621feb4ee4894d784dAdd Tokens299562992022-06-24 19:45:086 days 15 hrs ago0x38d6396ac0373f2a40c6a26e21da20daa24e426e IN  0x253056bd76138bae2fb2a27affd385e170cb3eee0 MATIC0.0137229632 44.628393402
0xe57ab531a79a173b7d443794e53739ca2ede6d5216a4ed89b7b48ab4b8dcc78cAdd Tokens299562752022-06-24 19:44:166 days 15 hrs ago0x38d6396ac0373f2a40c6a26e21da20daa24e426e IN  0x253056bd76138bae2fb2a27affd385e170cb3eee0 MATIC0.02796170191 47.742693321
0xad4a9e68725ce474d2a5984b7a415b87e2e203ac5fa6dd095cc31f3046bf4feaAdd Tokens299561882022-06-24 19:41:186 days 15 hrs ago0x38d6396ac0373f2a40c6a26e21da20daa24e426e IN  0x253056bd76138bae2fb2a27affd385e170cb3eee0 MATIC0.013239844482 55.64152185
0x358588101ca784a88f7ad43e279de9d0aa74de25fec29d1f7a9dbadced2dd271Add Tokens299559612022-06-24 19:33:286 days 15 hrs ago0x38d6396ac0373f2a40c6a26e21da20daa24e426e IN  0x253056bd76138bae2fb2a27affd385e170cb3eee0 MATIC0.006624069132 68.958339483
0xe09952d4e4ad0fdfac1fcdda2463a2eb761f311bb11644524b5bb65feb6ccb7e0x60806040299193402022-06-23 20:40:387 days 14 hrs ago0x38d6396ac0373f2a40c6a26e21da20daa24e426e IN  Create: Oracle0 MATIC0.072574781322 36.408119987
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Contract Source Code Verified (Exact Match)

Contract Name:
Oracle

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 8 : Oracle.sol
// SPDX-License-Identifier: MIT

//                                                 ______   __                                                   
//                                                /      \ /  |                                                  
//   _______   ______    ______   _______        /$$$$$$  |$$/  _______    ______   _______    _______   ______  
//  /       | /      \  /      \ /       \       $$ |_ $$/ /  |/       \  /      \ /       \  /       | /      \ 
// /$$$$$$$/ /$$$$$$  |/$$$$$$  |$$$$$$$  |      $$   |    $$ |$$$$$$$  | $$$$$$  |$$$$$$$  |/$$$$$$$/ /$$$$$$  |
// $$ |      $$ |  $$ |$$ |  $$/ $$ |  $$ |      $$$$/     $$ |$$ |  $$ | /    $$ |$$ |  $$ |$$ |      $$    $$ |
// $$ \_____ $$ \__$$ |$$ |      $$ |  $$ |      $$ |      $$ |$$ |  $$ |/$$$$$$$ |$$ |  $$ |$$ \_____ $$$$$$$$/ 
// $$       |$$    $$/ $$ |      $$ |  $$ |      $$ |      $$ |$$ |  $$ |$$    $$ |$$ |  $$ |$$       |$$       |
//  $$$$$$$/  $$$$$$/  $$/       $$/   $$/       $$/       $$/ $$/   $$/  $$$$$$$/ $$/   $$/  $$$$$$$/  $$$$$$$/
//                         .-.
//         .-""`""-.    |(@ @)
//      _/`oOoOoOoOo`\_ \ \-/
//     '.-=-=-=-=-=-=-.' \/ \
//       `-=.=-.-=.=-'    \ /\
//          ^  ^  ^       _H_ \

pragma solidity ^0.8.0;

import "./interfaces/IOffchainOracle.sol";
import "./interfaces/IChainlinkOracle.sol";
import "./interfaces/IUniswapV2Pair.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


contract Oracle is Ownable {
    struct Token {
        uint256 index;
        bool active;
    }

    IOffchainOracle public oracle = IOffchainOracle(0x7F069df72b7A39bCE9806e3AfaF579E54D8CF2b9);
    IERC20 public USDC = IERC20(0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174);
    IChainlinkOracle public usdcOracle = IChainlinkOracle(0xfE4A8cc5b5B2366C1B58Bea3858e81843581b2F7);
    IERC20[] public tokens;
    mapping(IERC20 => Token) public tokenInfo;

    uint8 public constant decimals = 6;

    event TokenAdded(address indexed token);
    event TokenRemoved(address indexed token);

    function getRateUSD(IERC20 token) public view returns (uint256) {
        ( , int256 answer, , , ) = usdcOracle.latestRoundData();
        if(token == USDC) {
            return uint256(answer) / 1e2;
        }
        uint256 rateUSDC = oracle.getRate(token, USDC, true);
        uint256 denominator = 10 ** (18 - IERC20Metadata(address(token)).decimals());
        rateUSDC /= denominator;
        return (rateUSDC * 1e8) / uint256(answer);
    }

    function getLpRateUSD(IUniswapV2Pair lpToken) public view returns (uint256) {
        IERC20Metadata token0 = IERC20Metadata(lpToken.token0());
        IERC20Metadata token1 = IERC20Metadata(lpToken.token1());
        (uint112 reserve0, uint112 reserve1, ) = lpToken.getReserves();

        uint256 rate0USD = getRateUSD(token0);
        uint256 rate1USD = getRateUSD(token1);

        uint256 denominator0 = 10 ** token0.decimals();
        uint256 denominator1 = 10 ** token1.decimals();

        uint256 token0TotalUSD = (rate0USD * reserve0) / denominator0;
        uint256 token1TotalUSD = (rate1USD * reserve1) / denominator1;

        uint256 totalUSD = token0TotalUSD + token1TotalUSD;

        return (totalUSD * (10**lpToken.decimals())) / lpToken.totalSupply();
    }

    function addTokens(IERC20[] memory _tokens) external onlyOwner {
        for(uint256 i = 0; i < _tokens.length; i++) {
            require(!tokenInfo[_tokens[i]].active, "CornFi Oracle: Token already added");
            tokenInfo[_tokens[i]] = Token(tokens.length, true);
            tokens.push(_tokens[i]);

            emit TokenAdded(address(_tokens[i]));
        }
    }

    function removeToken(IERC20 _token) external onlyOwner {
        require(tokenInfo[_token].active, "CornFi Oracle: Inactive token");
        Token storage removedToken = tokenInfo[_token];
        IERC20 _lastToken = tokens[tokens.length-1];
        Token storage lastToken = tokenInfo[_lastToken];

        tokens[removedToken.index] = tokens[lastToken.index];
        lastToken = removedToken;
        delete tokenInfo[_token];

        emit TokenRemoved(address(_token));
    }
}

File 2 of 8 : IOffchainOracle.sol
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

interface IOffchainOracle {
    function getRateToEth(IERC20 srcToken, bool useSrcWrappers) external view returns (uint256 weightedRate);
    function getRate(IERC20 srcToken, IERC20 dstToken, bool useWrappers) external view returns (uint256 weightedRate);
}

File 3 of 8 : IChainlinkOracle.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IChainlinkOracle {
  function decimals() external view returns (uint8);

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

  function version() external view returns (uint256);

  // getRoundData and latestRoundData should both raise "No data present"
  // if they do not have data to report, instead of returning unset values
  // which could be misinterpreted as actual reported values.
  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
    );
}

File 4 of 8 : IUniswapV2Pair.sol
pragma solidity >=0.5.0;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

File 5 of 8 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../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.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the 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 virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 6 of 8 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

File 7 of 8 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

File 8 of 8 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

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

Contract Security Audit

Contract ABI

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"}],"name":"TokenAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"}],"name":"TokenRemoved","type":"event"},{"inputs":[],"name":"USDC","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20[]","name":"_tokens","type":"address[]"}],"name":"addTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IUniswapV2Pair","name":"lpToken","type":"address"}],"name":"getLpRateUSD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"}],"name":"getRateUSD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"oracle","outputs":[{"internalType":"contract IOffchainOracle","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_token","type":"address"}],"name":"removeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"name":"tokenInfo","outputs":[{"internalType":"uint256","name":"index","type":"uint256"},{"internalType":"bool","name":"active","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"tokens","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"usdcOracle","outputs":[{"internalType":"contract IChainlinkOracle","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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