Contract 0x395434d252B0a4510cff10299bfe8D3489D0508B

Contract Overview

Balance:
0 MATIC
Txn Hash
Method
Block
From
To
Value [Txn Fee]
0x552e1b3c4806108348dfa9da46f582d9af870a0e30d3fe2e3840c2f2e40a37aa0x600360e0336390702023-03-27 17:21:4963 days 14 hrs ago0xb78565a3ded20c1f338234355b208dc14a5d4685 IN  Create: SaleExchangeRate0 MATIC0.004066191041.500000015
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Contract Source Code Verified (Exact Match)

Contract Name:
SaleExchangeRate

Compiler Version
v0.8.19+commit.7dd6d404

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 15 : SaleExchangeRate.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

contract SaleExchangeRate is Roles, InitialStableCoinDeclaration {
    address public SECURITIES; //address of the security token
    uint8 public priceDecimals; //decimals of the price
    uint256 public baseSecurityToFiatPrice; // price of the secutity token in fiat => fiat*(10**priceDecimals)
    bool public status; // isActive

    event BuyTokensEvent(
        address buyer,
        address securities,
        uint256 amountSecurities,
        address swapToken,
        uint256 securityPrice,
        string fiatUsed
    );

    modifier onlyActive() {
        require(status == true, "SaleExchangeRate: not active");
        _;
    }

    modifier onlyAllowedTokens(address _token) {
        require(
            !exTokenData[_token].blocked,
            "SaleExchangeRate: this token is blocked to swap"
        );
        _;
    }

    modifier ownerOrSuperAdmin() {
        require(
            owner() == _msgSender() ||
                hasRole(DEFAULT_ADMIN_ROLE, _msgSender()),
            "SaleExchangeRate: caller has to be the owner or SuperAdmin"
        );
        _;
    }

    constructor(
        address _securities,
        uint256 _baseSecurityToFiatPrice,
        uint8 _priceDecimals,
        //array of pairs:
        //[0]:address of stableCoin,
        //[1]:address of the price-contract stableCoin/USD
        address[2][] memory stableCoinsInfo
    ) InitialStableCoinDeclaration(stableCoinsInfo) {
        SECURITIES = _securities;
        baseSecurityToFiatPrice = _baseSecurityToFiatPrice;
        priceDecimals = _priceDecimals;
        status = true;
    }

    function changeStatus() external onlyRole(TECHNICAL_ROLE) {
        status = !status;
    }

    /// @notice Owner of the contract has an opportunity to send any tokens from the contract to his/her wallet
    /// @param _amount amount of the tokens to send (* decimals of token)
    /// @param _token address of the tokens to send
    /// @return true if the operation done successfully
    function sendBack(
        uint256 _amount,
        address _token
    ) external ownerOrSuperAdmin returns (bool) {
        IERC20(_token).transfer(_msgSender(), _amount);
        return true;
    }

    /// @notice price and its decimals of the secutity token in FIAT
    /// @param _priceInFIAT price of Security in FIAT (price multiplied by 10**_priceDecimals)
    /// @param _priceDecimals decimals for price in FIAT
    function setPrice(
        uint256 _priceInFIAT,
        uint8 _priceDecimals
    ) external ownerOrSuperAdmin {
        baseSecurityToFiatPrice = _priceInFIAT;
        priceDecimals = _priceDecimals;
    }

    function setStableCoinBlockStatus(
        address _exToken,
        bool _isBlocked
    ) external ownerOrSuperAdmin {
        _updateExchangeToken(_exToken, _isBlocked);
    }

    function setPriceFeedForToken(
        address _exToken,
        address _priceContract
    ) external onlyRole(TECHNICAL_ROLE) {
        _updateExchangeToken(_exToken, _priceContract);
        priceFeed[_exToken] = AggregatorV3Interface(_priceContract);
    }

    function addAllowedToken(
        address _token,
        address _priceContract
    ) external onlyRole(TECHNICAL_ROLE) returns (bool) {
        require(
            _token != address(0),
            "SaleExchangeRate: You try to add zero-address"
        );
        for (uint256 i = 0; i < allowedStableCoins.length; i++) {
            require(
                allowedStableCoins[i].stableCoinAddress != _token,
                "SaleExchangeRate: this token is already available"
            );
        }
        _addAllowedToken(_token, _priceContract);
        return true;
    }

    function removeTokenFromAllowed(
        address _token
    ) external onlyRole(TECHNICAL_ROLE) returns (bool) {
        for (uint256 i = 0; i < allowedStableCoins.length; i++) {
            if (allowedStableCoins[i].stableCoinAddress == _token) {
                if (i != allowedStableCoins.length - 1) {
                    allowedStableCoins[i] = allowedStableCoins[
                        allowedStableCoins.length - 1
                    ];
                }
                allowedStableCoins.pop();
            }
        }
        delete exTokenData[_token];
        return true;
    }

    /// @notice swap of the token to security.
    /// @dev make swap, create and write the order of the operation, emit BuyTokensEvent
    /// @param _amountOfStableCoin amount of token to buy securities
    /// @param _stableCoinAddress address of the token to buy security.
    /// Token has to be Allowed.
    /// Token has to be equal to the USDT in price, in other way formula doesn't work
    /// @return true if the operation done successfully
    function buyToken(
        uint256 _amountOfStableCoin,
        address _stableCoinAddress
    )
        public
        virtual
        onlyActive
        onlyAllowedTokens(_stableCoinAddress)
        returns (bool)
    {
        (, uint256 amountSecurities) = buyTokenView(
            _amountOfStableCoin,
            _stableCoinAddress
        );
        uint256 balanceBefore = IERC20(_stableCoinAddress).balanceOf(
            address(this)
        );

        IERC20(_stableCoinAddress).transferFrom(
            _msgSender(),
            address(this),
            _amountOfStableCoin
        );

        require(
            IERC20(_stableCoinAddress).balanceOf(address(this)) ==
                (balanceBefore + _amountOfStableCoin),
            "SaleExchangeRate: token transfer for buying failed"
        );

        IERC20(SECURITIES).transfer(_msgSender(), amountSecurities);

        emit BuyTokensEvent(
            _msgSender(),
            SECURITIES,
            amountSecurities,
            _stableCoinAddress,
            baseSecurityToFiatPrice,
            getCurrentFiat()
        );
        return true;
    }

    /// @notice function count and return the amount of security to be gotten for the proper amount of tokens
    /// @param _amountOfStableCoin amount of token you want to spend
    /// @param _stableCoinAddress address of token you want to use for buying security
    /// Token has to be Allowed
    /// @return token , securities -  tuple of uintegers - (amount of token to spend, amount of securities to get)
    function buyTokenView(
        uint256 _amountOfStableCoin,
        address _stableCoinAddress
    )
        public
        view
        onlyAllowedTokens(_stableCoinAddress)
        returns (uint256, uint256)
    {
        //scale decimals of stableCoin to
        uint256 scaledAmountOfStableCoins = _scaleAmount(
            _amountOfStableCoin,
            IERC20Metadata(_stableCoinAddress).decimals(),
            priceDecimals
        );

        //calculate amount of security Tokens to buy
        uint256 amountOfSecurities = ((scaledAmountOfStableCoins *
            getStableCoinPriceInFiat(_stableCoinAddress)) /
            baseSecurityToFiatPrice);

        return (_amountOfStableCoin, amountOfSecurities);
    }

    function getStableCoinPriceInFiat(
        address _token
    ) public view returns (uint256) {
        return _getStableCoinPriceInFiat(_token, priceDecimals);
    }
}

File 2 of 15 : Roles.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";

contract Roles is Ownable, AccessControl {
    bytes32 public constant TECHNICAL_ROLE = keccak256("TECHNICAL_ROLE");

    constructor() {
        _setRoleAdmin(TECHNICAL_ROLE, TECHNICAL_ROLE);

        _grantRole(DEFAULT_ADMIN_ROLE, _msgSender());
        _grantRole(TECHNICAL_ROLE, _msgSender());
    }
}

File 3 of 15 : InitialStableCoinDeclaration.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./FiatDeclaration.sol";
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

contract InitialStableCoinDeclaration is FiatDeclaration {
    struct ExchangeToken {
        address stableCoinAddress;
        //address of the priceFeed smart contract StableCoin/USD
        address priceFeedAddress;
        bool blocked;
    }

    ExchangeToken[] public allowedStableCoins;

    mapping(address => ExchangeToken) exTokenData;
    mapping(address => AggregatorV3Interface) priceFeed;

    constructor(
        //array of pairs:
        //[0]:address of stableCoin,
        //[1]:address of the price-contract stableCoin/USD
        address[2][] memory stableCoinsInfo
    ) {
        for (uint256 i = 0; i < stableCoinsInfo.length; i++) {
            _addAllowedToken(stableCoinsInfo[i][0], stableCoinsInfo[i][1]);
        }
    }

    /// @notice returns array of all possible stableCoins with their full data
    function getAllStableCoinsInfo()
        external
        view
        returns (ExchangeToken[] memory)
    {
        return allowedStableCoins;
    }

    function _getStableCoinPriceInFiat(
        address _token,
        uint8 _priceDecimals
    ) internal view returns (uint256) {
        return
            _getLatestPrice(_token, _priceDecimals) /
            _getFiatToUSDrate(currentFiat, _priceDecimals);
    }

    function _getFiatToUSDrate(
        FiatCurrency _fiat,
        uint8 _priceDecimals
    ) internal view returns (uint256) {
        if (fiatData[_fiat].fiatRouter == address(0)) {
            return 1;
        } else {
            AggregatorV3Interface fR = AggregatorV3Interface(
                fiatData[_fiat].fiatRouter
            );
            (, int price, , , ) = fR.latestRoundData();
            return _scaleAmount(uint256(price), fR.decimals(), _priceDecimals);
        }
    }

    /// @notice the function reduces the amount to the required decimals
    /// @param _amount amount of token you want to reduce
    /// @param _amountDecimals decimals which amount has now
    /// @param _decimalsToUse decimals you want to get after scaling
    /// @return uint256 the scaled amount with proper decimals
    function _scaleAmount(
        uint256 _amount,
        uint8 _amountDecimals,
        uint8 _decimalsToUse
    ) internal pure returns (uint256) {
        if (_amountDecimals < _decimalsToUse) {
            return _amount * (10 ** uint256(_decimalsToUse - _amountDecimals));
        } else if (_amountDecimals > _decimalsToUse) {
            return _amount / (10 ** uint256(_amountDecimals - _decimalsToUse));
        }
        return _amount;
    }

    function _getLatestPrice(
        address _token,
        uint8 _priceDecimals
    ) internal view returns (uint256) {
        AggregatorV3Interface pF = priceFeed[_token];

        (, int price, , , ) = pF.latestRoundData();
        return _scaleAmount(uint256(price), pF.decimals(), _priceDecimals);
    }

    function _addAllowedToken(address _token, address _priceContract) internal {
        ExchangeToken storage et = exTokenData[_token];
        et.stableCoinAddress = _token;
        et.priceFeedAddress = _priceContract;

        priceFeed[_token] = AggregatorV3Interface(_priceContract);
        allowedStableCoins.push(exTokenData[_token]);
    }

    function _updateExchangeToken(address _token, address _priceFeed) internal {
        ExchangeToken storage et = exTokenData[_token];
        et.priceFeedAddress = _priceFeed;
        _updateAllowedStableCoinsList(_token);
    }

    function _updateExchangeToken(address _token, bool _isBlocked) internal {
        ExchangeToken storage et = exTokenData[_token];
        et.blocked = _isBlocked;
        _updateAllowedStableCoinsList(_token);
    }

    function _updateAllowedStableCoinsList(address _token) internal {
        for (uint256 i = 0; i < allowedStableCoins.length; i++) {
            ExchangeToken memory et = exTokenData[_token];
            if (allowedStableCoins[i].stableCoinAddress == _token) {
                allowedStableCoins[i] = et;
            }
        }
    }
}

File 4 of 15 : FiatDeclaration.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract FiatDeclaration {
    enum FiatCurrency {
        USD, // 0
        EUR, // 1
        GBP // 2
    }

    // The currentFiat has a default value of the first member: `USD`
    FiatCurrency currentFiat;

    // the order of names has to be equal to order of FiatCurrency
    string[3] fiatNameList = ["USD", "EUR", "GBP"];

    // Array of addresses of price-feed contracts for fiat/fiat pairs:
    // [0] - USD / USD priceFeed = '0x0000000000000000000000000000000000000000' !!!
    // [1] - EUR / USD
    // [2] - GBP / USD
    address[3] fiatPriceFeedList = [
        0x0000000000000000000000000000000000000000,
        0x0000000000000000000000000000000000000000,
        0x0000000000000000000000000000000000000000
    ];

    struct Fiat {
        uint256 enumNumber;
        string literalName;
        address fiatRouter;
    }

    Fiat[] public possibleFiat;
    mapping(FiatCurrency => Fiat) fiatData;

    constructor() {
        require(
            fiatPriceFeedList.length == fiatNameList.length,
            "SaleExchangeRate: check number of priceFeeds for fiat"
        );
        for (uint256 i = 0; i < fiatPriceFeedList.length; i++) {
            _addFiat(i);
        }
    }

    function getCurrentFiat() public view returns (string memory) {
        return fiatNameList[uint256(currentFiat)];
    }

    function getAllPossibleFiat() public view returns (Fiat[] memory) {
        return possibleFiat;
    }

    function _addFiat(uint256 _index) internal {
        Fiat storage f = fiatData[FiatCurrency(_index)];
        f.enumNumber = _index;
        f.literalName = fiatNameList[_index];
        f.fiatRouter = fiatPriceFeedList[_index];

        possibleFiat.push(fiatData[FiatCurrency(_index)]);
    }
}

File 5 of 15 : Math.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

File 6 of 15 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 7 of 15 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

File 8 of 15 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

File 9 of 15 : 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;
    }
}

File 10 of 15 : 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 11 of 15 : 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 12 of 15 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 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 {
        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 13 of 15 : IAccessControl.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

File 14 of 15 : AccessControl.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

File 15 of 15 : AggregatorV3Interface.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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
    );
}

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

Contract ABI

[{"inputs":[{"internalType":"address","name":"_securities","type":"address"},{"internalType":"uint256","name":"_baseSecurityToFiatPrice","type":"uint256"},{"internalType":"uint8","name":"_priceDecimals","type":"uint8"},{"internalType":"address[2][]","name":"stableCoinsInfo","type":"address[2][]"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"buyer","type":"address"},{"indexed":false,"internalType":"address","name":"securities","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountSecurities","type":"uint256"},{"indexed":false,"internalType":"address","name":"swapToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"securityPrice","type":"uint256"},{"indexed":false,"internalType":"string","name":"fiatUsed","type":"string"}],"name":"BuyTokensEvent","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"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SECURITIES","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TECHNICAL_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_priceContract","type":"address"}],"name":"addAllowedToken","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"allowedStableCoins","outputs":[{"internalType":"address","name":"stableCoinAddress","type":"address"},{"internalType":"address","name":"priceFeedAddress","type":"address"},{"internalType":"bool","name":"blocked","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseSecurityToFiatPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountOfStableCoin","type":"uint256"},{"internalType":"address","name":"_stableCoinAddress","type":"address"}],"name":"buyToken","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountOfStableCoin","type":"uint256"},{"internalType":"address","name":"_stableCoinAddress","type":"address"}],"name":"buyTokenView","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"changeStatus","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getAllPossibleFiat","outputs":[{"components":[{"internalType":"uint256","name":"enumNumber","type":"uint256"},{"internalType":"string","name":"literalName","type":"string"},{"internalType":"address","name":"fiatRouter","type":"address"}],"internalType":"struct FiatDeclaration.Fiat[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAllStableCoinsInfo","outputs":[{"components":[{"internalType":"address","name":"stableCoinAddress","type":"address"},{"internalType":"address","name":"priceFeedAddress","type":"address"},{"internalType":"bool","name":"blocked","type":"bool"}],"internalType":"struct InitialStableCoinDeclaration.ExchangeToken[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentFiat","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"getStableCoinPriceInFiat","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"possibleFiat","outputs":[{"internalType":"uint256","name":"enumNumber","type":"uint256"},{"internalType":"string","name":"literalName","type":"string"},{"internalType":"address","name":"fiatRouter","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"priceDecimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"removeTokenFromAllowed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_token","type":"address"}],"name":"sendBack","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_priceInFIAT","type":"uint256"},{"internalType":"uint8","name":"_priceDecimals","type":"uint8"}],"name":"setPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_exToken","type":"address"},{"internalType":"address","name":"_priceContract","type":"address"}],"name":"setPriceFeedForToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_exToken","type":"address"},{"internalType":"bool","name":"_isBlocked","type":"bool"}],"name":"setStableCoinBlockStatus","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"status","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000008e82483b435d4f8731b9f9fb3960c053d62a056c0000000000000000000000000000000000000000000000000000000000000320000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000001000000000000000000000000326c977e6efc84e512bb9c30f76e30c160ed06fb0000000000000000000000001c2252aeed50e0c9b64bdff2735ee3c932f5c408
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000008e82483b435d4f8731b9f9fb3960c053d62a056c
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000320
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [5] : 000000000000000000000000326c977e6efc84e512bb9c30f76e30c160ed06fb
Arg [6] : 0000000000000000000000001c2252aeed50e0c9b64bdff2735ee3c932f5c408


Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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