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// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.8.28;

import {Create2Factory} from "common/utils/Create2Factory.sol";
import {OracleScaler} from "silo-oracles/contracts/scaler/OracleScaler.sol";
import {IOracleScalerFactory} from "silo-oracles/contracts/interfaces/IOracleScalerFactory.sol";
import {ISiloOracle} from "silo-core/contracts/interfaces/ISiloOracle.sol";

contract OracleScalerFactory is Create2Factory, IOracleScalerFactory {
    mapping(ISiloOracle => bool) public createdInFactory;

    /// @inheritdoc IOracleScalerFactory
    function createOracleScaler(
        address _quoteToken,
        bytes32 _externalSalt
    ) external virtual returns (ISiloOracle oracleScaler) {
        oracleScaler = new OracleScaler{salt: _salt(_externalSalt)}(_quoteToken);

        createdInFactory[oracleScaler] = true;

        emit OracleScalerCreated(oracleScaler);
    }
}

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

import {Nonces} from "openzeppelin5/utils/Nonces.sol";

contract Create2Factory is Nonces {
    function _salt() internal returns (bytes32 salt) {
        salt = keccak256(abi.encodePacked(
            msg.sender,
            _useNonce(msg.sender)
        ));
    }

    function _salt(bytes32 _externalSalt) internal returns (bytes32 salt) {
        salt = keccak256(abi.encodePacked(
            msg.sender,
            _useNonce(msg.sender),
            _externalSalt
        ));
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.8.28;

import {ISiloOracle} from "silo-core/contracts/interfaces/ISiloOracle.sol";
import {TokenHelper} from "silo-core/contracts/lib/TokenHelper.sol";

/// @notice OracleScaler is an oracle, which scales the token amounts to 18 decimals instead of original decimals.
/// For example, USDC decimals are 6. 1 USDC is 10**6. This oracle will scale this amount to 10**18. If the token
/// decimals > 18, this oracle will revert.
/// This oracle was created to increase the precision for LTV calculation of low decimal tokens.
contract OracleScaler is ISiloOracle {
    /// @dev the amounts will be scaled to 18 decimals.
    uint8 public constant DECIMALS_TO_SCALE = 18;

    /// @dev token address to use for a quote.
    address public immutable QUOTE_TOKEN; // solhint-disable-line var-name-mixedcase

    /// @dev scale factor will be multiplied with base token's amount to calculate the scaled value.
    uint256 public immutable SCALE_FACTOR; // solhint-disable-line var-name-mixedcase

    /// @dev revert if the original token decimals is more or equal 18
    error TokenDecimalsTooLarge();

    /// @dev revert if the baseToken to quote is not equal to QUOTE_TOKEN
    error AssetNotSupported();

    constructor(address _quoteToken) {
        uint8 quoteTokenDecimals = uint8(TokenHelper.assertAndGetDecimals(_quoteToken));
        require(quoteTokenDecimals < DECIMALS_TO_SCALE, TokenDecimalsTooLarge());

        SCALE_FACTOR = 10 ** uint256(DECIMALS_TO_SCALE - quoteTokenDecimals);

        QUOTE_TOKEN = _quoteToken;
    }

    // @inheritdoc ISiloOracle
    function beforeQuote(address) external virtual {}

    // @inheritdoc ISiloOracle
    function quote(uint256 _baseAmount, address _baseToken) external virtual view returns (uint256 quoteAmount) {
        require(_baseToken == QUOTE_TOKEN, AssetNotSupported());

        quoteAmount = _baseAmount * SCALE_FACTOR;
    }

    // @inheritdoc ISiloOracle
    function quoteToken() external virtual view returns (address) {
        return address(QUOTE_TOKEN);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {ISiloOracle} from "silo-core/contracts/interfaces/ISiloOracle.sol";

interface IOracleScalerFactory {
    event OracleScalerCreated(ISiloOracle indexed oracleScaler);

    /// @notice Create a new oracle scaler
    /// @param _quoteToken The quote token for this oracle to support.
    /// @param _externalSalt The external salt to be used together with factory salt
    /// @return oracleScaler The oracle scaler created
    function createOracleScaler(
        address _quoteToken,
        bytes32 _externalSalt
    ) external returns (ISiloOracle oracleScaler);
}

// 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) (utils/Nonces.sol)
pragma solidity ^0.8.20;

/**
 * @dev Provides tracking nonces for addresses. Nonces will only increment.
 */
abstract contract Nonces {
    /**
     * @dev The nonce used for an `account` is not the expected current nonce.
     */
    error InvalidAccountNonce(address account, uint256 currentNonce);

    mapping(address account => uint256) private _nonces;

    /**
     * @dev Returns the next unused nonce for an address.
     */
    function nonces(address owner) public view virtual returns (uint256) {
        return _nonces[owner];
    }

    /**
     * @dev Consumes a nonce.
     *
     * Returns the current value and increments nonce.
     */
    function _useNonce(address owner) internal virtual returns (uint256) {
        // For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be
        // decremented or reset. This guarantees that the nonce never overflows.
        unchecked {
            // It is important to do x++ and not ++x here.
            return _nonces[owner]++;
        }
    }

    /**
     * @dev Same as {_useNonce} but checking that `nonce` is the next valid for `owner`.
     */
    function _useCheckedNonce(address owner, uint256 nonce) internal virtual {
        uint256 current = _useNonce(owner);
        if (nonce != current) {
            revert InvalidAccountNonce(owner, current);
        }
    }
}

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

import {IERC20Metadata} from "openzeppelin5/token/ERC20/extensions/IERC20Metadata.sol";

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

library TokenHelper {
    uint256 private constant _BYTES32_SIZE = 32;

    error TokenIsNotAContract();

    function assertAndGetDecimals(address _token) internal view returns (uint256) {
        (bool hasMetadata, bytes memory data) =
            _tokenMetadataCall(_token, abi.encodeCall(IERC20Metadata.decimals, ()));

        // decimals() is optional in the ERC20 standard, so if metadata is not accessible
        // we assume there are no decimals and use 0.
        if (!hasMetadata) {
            return 0;
        }

        return abi.decode(data, (uint8));
    }

    /// @dev Returns the symbol for the provided ERC20 token.
    /// An empty string is returned if the call to the token didn't succeed.
    /// @param _token address of the token to get the symbol for
    /// @return assetSymbol the token symbol
    function symbol(address _token) internal view returns (string memory assetSymbol) {
        (bool hasMetadata, bytes memory data) =
            _tokenMetadataCall(_token, abi.encodeCall(IERC20Metadata.symbol, ()));

        if (!hasMetadata || data.length == 0) {
            return "?";
        } else if (data.length == _BYTES32_SIZE) {
            return string(removeZeros(data));
        } else {
            return abi.decode(data, (string));
        }
    }

    /// @dev Removes bytes with value equal to 0 from the provided byte array.
    /// @param _data byte array from which to remove zeroes
    /// @return result byte array with zeroes removed
    function removeZeros(bytes memory _data) internal pure returns (bytes memory result) {
        uint256 n = _data.length;

        for (uint256 i; i < n; i++) {
            if (_data[i] == 0) continue;

            result = abi.encodePacked(result, _data[i]);
        }
    }

    /// @dev Performs a staticcall to the token to get its metadata (symbol, decimals, name)
    function _tokenMetadataCall(address _token, bytes memory _data) private view returns (bool, bytes memory) {
        // We need to do this before the call, otherwise the call will succeed even for EOAs
        require(IsContract.isContract(_token), TokenIsNotAContract());

        (bool success, bytes memory result) = _token.staticcall(_data);

        // If the call reverted we assume the token doesn't follow the metadata extension
        if (!success) {
            return (false, "");
        }

        return (true, result);
    }
}

// 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: BUSL-1.1
pragma solidity ^0.8.24;

library IsContract {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address _account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return _account.code.length > 0;
    }
}

// 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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    "silo-foundry-utils/=gitmodules/silo-foundry-utils/contracts/",
    "properties/=gitmodules/crytic/properties/contracts/",
    "silo-core/=silo-core/",
    "silo-oracles/=silo-oracles/",
    "silo-vaults/=silo-vaults/",
    "@openzeppelin/=gitmodules/openzeppelin-contracts-5/",
    "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/",
    "ERC4626/=gitmodules/crytic/properties/lib/ERC4626/contracts/",
    "createx/=gitmodules/pyth-sdk-solidity/lazer/contracts/evm/lib/createx/src/",
    "crytic/=gitmodules/crytic/",
    "ds-test/=gitmodules/openzeppelin-contracts-5/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=gitmodules/openzeppelin-contracts-5/lib/erc4626-tests/",
    "halmos-cheatcodes/=gitmodules/morpho-blue/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts-5/=gitmodules/openzeppelin-contracts-5/",
    "openzeppelin-contracts-upgradeable-5/=gitmodules/openzeppelin-contracts-upgradeable-5/",
    "openzeppelin-contracts-upgradeable/=gitmodules/pyth-sdk-solidity/lazer/contracts/evm/lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=gitmodules/openzeppelin-contracts-upgradeable-5/lib/openzeppelin-contracts/",
    "solady/=gitmodules/pyth-sdk-solidity/lazer/contracts/evm/lib/createx/lib/solady/",
    "solmate/=gitmodules/crytic/properties/lib/solmate/src/",
    "x-silo/=node_modules/x-silo/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
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      "*": [
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        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"currentNonce","type":"uint256"}],"name":"InvalidAccountNonce","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"contract ISiloOracle","name":"oracleScaler","type":"address"}],"name":"OracleScalerCreated","type":"event"},{"inputs":[{"internalType":"address","name":"_quoteToken","type":"address"},{"internalType":"bytes32","name":"_externalSalt","type":"bytes32"}],"name":"createOracleScaler","outputs":[{"internalType":"contract ISiloOracle","name":"oracleScaler","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ISiloOracle","name":"","type":"address"}],"name":"createdInFactory","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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