// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.28;

import {IERC20Metadata} from "openzeppelin5/token/ERC20/extensions/IERC20Metadata.sol";
import {ISiloOracle} from "silo-core/contracts/interfaces/ISiloOracle.sol";

contract OracleForQA is ISiloOracle {
    address public immutable QUOTE_TOKEN;
    uint256 public immutable BASE_DECIMALS;
    address public immutable ADMIN;

    uint256 public priceOfOneBaseToken;

    error ZeroPrice();
    error OnlyAdminCanSetPrice();

    constructor (address base, address _quote, address _admin) {
        QUOTE_TOKEN = _quote;
        BASE_DECIMALS = IERC20Metadata(base).decimals();
        ADMIN = _admin;
    }

    /// @param _price if oracle is set for WETH/USDC, where USDC is quote, then correct price would be 3000e6
    function setPriceOfOneBaseToken(uint256 _price) external {
        require(ADMIN == address(0) || msg.sender == ADMIN, OnlyAdminCanSetPrice());

        priceOfOneBaseToken = _price;
    }

    function quoteToken() external view override virtual returns (address) {
        return QUOTE_TOKEN;
    }

    /// @inheritdoc ISiloOracle
    function quote(uint256 _baseAmount, address _baseToken) external view virtual returns (uint256 quoteAmount) {
        quoteAmount = _baseToken == QUOTE_TOKEN
            ? _baseAmount
            : _baseAmount * priceOfOneBaseToken / (10 ** BASE_DECIMALS);

        require(quoteAmount != 0, ZeroPrice());
    }

    function beforeQuote(address) external pure virtual override {
        // nothing to execute
    }
}

// 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 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 >=0.5.0;

interface ISiloOracle {
    /// @notice Hook function to call before `quote` function reads price
    /// @dev This hook function can be used to change state right before the price is read. For example it can be used
    ///      for curve read only reentrancy protection. In majority of implementations this will be an empty function.
    ///      WARNING: reverts are propagated to Silo so if `beforeQuote` reverts, Silo reverts as well.
    /// @param _baseToken Address of priced token
    function beforeQuote(address _baseToken) external;

    /// @return quoteAmount Returns quote price for _baseAmount of _baseToken
    /// @param _baseAmount Amount of priced token
    /// @param _baseToken Address of priced token
    function quote(uint256 _baseAmount, address _baseToken) external view returns (uint256 quoteAmount);

    /// @return address of token in which quote (price) is denominated
    function quoteToken() external view returns (address);
}

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

pragma solidity ^0.8.20;

/**
 * @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);
}

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    "properties/=gitmodules/crytic/properties/contracts/",
    "silo-core/=silo-core/",
    "silo-oracles/=silo-oracles/",
    "silo-vaults/=silo-vaults/",
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    "morpho-blue/=gitmodules/morpho-blue/src/",
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    "openzeppelin5-upgradeable/=gitmodules/openzeppelin-contracts-upgradeable-5/contracts/",
    "chainlink/=gitmodules/chainlink/contracts/src/",
    "chainlink-ccip/=gitmodules/chainlink-ccip/contracts/src/",
    "uniswap/=gitmodules/uniswap/",
    "@uniswap/v3-core/=gitmodules/uniswap/v3-core/",
    "pyth-sdk-solidity/=gitmodules/pyth-sdk-solidity/target_chains/ethereum/sdk/solidity/",
    "a16z-erc4626-tests/=gitmodules/a16z-erc4626-tests/",
    "@ensdomains/=node_modules/@ensdomains/",
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    "ERC4626/=gitmodules/crytic/properties/lib/ERC4626/contracts/",
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    "crytic/=gitmodules/crytic/",
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    "halmos-cheatcodes/=gitmodules/morpho-blue/lib/halmos-cheatcodes/src/",
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  "metadata": {
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    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
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        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false
}

• No Contract Security Audit Submitted- Submit Audit Here

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