ETH Price: $2,646.56 (+5.91%)

Contract

0x5E751b2cD777aD3354649471E8E21B453D7A5891
 

Overview

ETH Balance

0.00183000000000806 ETH

Eth Value

$4.84 (@ $2,646.56/ETH)

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Withdraw149022442022-06-04 8:15:58878 days ago1654330558IN
0x5E751b2c...53D7A5891
0 ETH0.0078943837.30137933
Update Defaulted...149022032022-06-04 8:05:54878 days ago1654329954IN
0x5E751b2c...53D7A5891
0 ETH0.0009319634.30628105
Exchange St Eth ...149021892022-06-04 8:02:04878 days ago1654329724IN
0x5E751b2c...53D7A5891
0 ETH0.0049916431.42006544
Update Safety Fu...149021702022-06-04 7:58:19878 days ago1654329499IN
0x5E751b2c...53D7A5891
0 ETH0.0012656244.82152336
Withdraw149021162022-06-04 7:44:37878 days ago1654328677IN
0x5E751b2c...53D7A5891
0 ETH0.0048885123.09848495
Update Defaulted...146978182022-05-02 10:37:00911 days ago1651487820IN
0x5E751b2c...53D7A5891
0 ETH0.0019451639.58565904
Liquidate NFT146778522022-04-29 7:22:20914 days ago1651216940IN
0x5E751b2c...53D7A5891
0.42 ETH0.0015465747.42482746
Get Defaulted NF...146778442022-04-29 7:19:51914 days ago1651216791IN
0x5E751b2c...53D7A5891
0 ETH0.005909847.69010514
Deposit ETH146777642022-04-29 7:00:42914 days ago1651215642IN
0x5E751b2c...53D7A5891
0.1 ETH0.0063448345.76448664
Deposit ETH146777432022-04-29 6:54:54914 days ago1651215294IN
0x5E751b2c...53D7A5891
0.5 ETH0.0046753630.02014283
Withdraw146678582022-04-27 17:28:02915 days ago1651080482IN
0x5E751b2c...53D7A5891
0 ETH0.01917447110.21078481
Deposit ETH146676852022-04-27 16:50:36915 days ago1651078236IN
0x5E751b2c...53D7A5891
0.01 ETH0.0087128450.40956746
Exchange St Eth ...146655672022-04-27 9:02:47916 days ago1651050167IN
0x5E751b2c...53D7A5891
0 ETH0.0057175636.75875667
Exchange Eth To ...146655532022-04-27 8:58:21916 days ago1651049901IN
0x5E751b2c...53D7A5891
0 ETH0.0044953328.8223638
Grant Role146655252022-04-27 8:52:12916 days ago1651049532IN
0x5E751b2c...53D7A5891
0 ETH0.0013677326.60905137
Grant Role146655222022-04-27 8:51:56916 days ago1651049516IN
0x5E751b2c...53D7A5891
0 ETH0.0009195231.5296097
Grant Role146655212022-04-27 8:51:44916 days ago1651049504IN
0x5E751b2c...53D7A5891
0 ETH0.0015487130.13718674
0x61010060146655192022-04-27 8:51:21916 days ago1651049481IN
 Create: CyanVaultV1
1 ETH0.0952025633.455495

Latest 22 internal transactions

Advanced mode:
Parent Transaction Hash Block From To
149022442022-06-04 8:15:58878 days ago1654330558
0x5E751b2c...53D7A5891
1.09825774 ETH
149021892022-06-04 8:02:04878 days ago1654329724
0x5E751b2c...53D7A5891
0.09825774 ETH
149021162022-06-04 7:44:37878 days ago1654328677
0x5E751b2c...53D7A5891
0.84889381 ETH
146776992022-04-29 6:46:57914 days ago1651214817
0x5E751b2c...53D7A5891
0.14154036 ETH
146776832022-04-29 6:43:46914 days ago1651214626
0x5E751b2c...53D7A5891
0.05428072 ETH
146776772022-04-29 6:43:09914 days ago1651214589
0x5E751b2c...53D7A5891
0.05428072 ETH
146776742022-04-29 6:42:26914 days ago1651214546
0x5E751b2c...53D7A5891
0.05428072 ETH
146776362022-04-29 6:33:22914 days ago1651214002
0x5E751b2c...53D7A5891
0.14154036 ETH
146775472022-04-29 6:13:21914 days ago1651212801
0x5E751b2c...53D7A5891
0.33 ETH
146775442022-04-29 6:12:43914 days ago1651212763
0x5E751b2c...53D7A5891
0.33 ETH
146678582022-04-27 17:28:02915 days ago1651080482
0x5E751b2c...53D7A5891
0.01047941 ETH
146678542022-04-27 17:26:41915 days ago1651080401
0x5E751b2c...53D7A5891
0.03216295 ETH
146678342022-04-27 17:22:41915 days ago1651080161
0x5E751b2c...53D7A5891
0.03216295 ETH
146678212022-04-27 17:18:44915 days ago1651079924
0x5E751b2c...53D7A5891
0.09503865 ETH
146678092022-04-27 17:17:00915 days ago1651079820
0x5E751b2c...53D7A5891
0.09503865 ETH
146678052022-04-27 17:15:13915 days ago1651079713
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0.03216295 ETH
146677862022-04-27 17:10:58915 days ago1651079458
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0.09503865 ETH
146677562022-04-27 17:03:31915 days ago1651079011
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0.09503865 ETH
146677062022-04-27 16:53:11915 days ago1651078391
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0.339 ETH
146676512022-04-27 16:42:50915 days ago1651077770
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0.08612001 ETH
146655672022-04-27 9:02:47916 days ago1651050167
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0.09991831 ETH
146655532022-04-27 8:58:21916 days ago1651049901
0x5E751b2c...53D7A5891
0.2 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
CyanVaultV1

Compiler Version
v0.8.13+commit.abaa5c0e

Optimization Enabled:
Yes with 500 runs

Other Settings:
default evmVersion
File 1 of 17 : CyanVaultV1.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import "@openzeppelin/contracts/security/Pausable.sol";

import "./CyanVaultTokenV1.sol";
import "./IStableSwapSTETH.sol";

contract CyanVaultV1 is AccessControl, ReentrancyGuard, ERC721Holder, Pausable {
    bytes32 public constant CYAN_ROLE = keccak256("CYAN_ROLE");
    bytes32 public constant CYAN_PAYMENT_PLAN_ROLE =
        keccak256("CYAN_PAYMENT_PLAN_ROLE");
    bytes32 public constant CYAN_BALANCER_ROLE =
        keccak256("CYAN_BALANCER_ROLE");

    event DepositETH(
        address indexed from,
        uint256 ethAmount,
        uint256 tokenAmount
    );
    event Lend(address indexed to, uint256 amount);
    event Earn(uint256 paymentAmount, uint256 profitAmount);
    event NftDefaulted(uint256 unpaidAmount, uint256 estimatedPriceOfNFT);
    event NftLiquidated(uint256 defaultedAssetsAmount, uint256 soldAmount);
    event WithdrawETH(
        address indexed from,
        uint256 ethAmount,
        uint256 tokenAmount
    );
    event GetDefaultedNFT(
        address indexed to,
        address indexed contractAddress,
        uint256 indexed tokenId
    );
    event UpdatedDefaultedNFTAssetAmount(uint256 amount);
    event UpdatedServiceFeePercent(uint256 from, uint256 to);
    event UpdatedSafetyFundPercent(uint256 from, uint256 to);
    event ExchangedEthToStEth(uint256 ethAmount, uint256 receivedStEthAmount);
    event ExchangedStEthToEth(uint256 stEthAmount, uint256 receivedEthAmount);
    event ReceivedETH(uint256 amount, address indexed from);

    address public immutable _cyanVaultTokenAddress;
    CyanVaultTokenV1 private immutable _cyanVaultTokenContract;

    IERC20 private immutable _stEthTokenContract;
    IStableSwapSTETH private immutable _stableSwapSTETHContract;

    // Safety fund percent. (x100)
    uint256 public _safetyFundPercent;

    // Cyan service fee percent. (x100)
    uint256 public _serviceFeePercent;

    // Remaining amount of ETH
    uint256 private REMAINING_AMOUNT;

    // Total loaned amount
    uint256 private LOANED_AMOUNT;

    // Total defaulted NFT amount
    uint256 private DEFAULTED_NFT_ASSET_AMOUNT;

    // Cyan collected service fee
    uint256 private COLLECTED_SERVICE_FEE_AMOUNT;

    constructor(
        address cyanVaultTokenAddress,
        address cyanPaymentPlanAddress,
        address stEthTokenAddress,
        address curveStableSwapStEthAddress,
        address cyanSuperAdmin,
        uint256 safetyFundPercent,
        uint256 serviceFeePercent
    ) payable {
        _cyanVaultTokenAddress = cyanVaultTokenAddress;
        _cyanVaultTokenContract = CyanVaultTokenV1(_cyanVaultTokenAddress);
        _safetyFundPercent = safetyFundPercent;
        _serviceFeePercent = serviceFeePercent;

        LOANED_AMOUNT = 0;
        DEFAULTED_NFT_ASSET_AMOUNT = 0;
        REMAINING_AMOUNT = msg.value;

        _stEthTokenContract = IERC20(stEthTokenAddress);
        _stableSwapSTETHContract = IStableSwapSTETH(
            curveStableSwapStEthAddress
        );

        _setupRole(DEFAULT_ADMIN_ROLE, cyanSuperAdmin);
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _setupRole(CYAN_PAYMENT_PLAN_ROLE, cyanPaymentPlanAddress);
    }

    // User stakes ETH
    function depositETH() external payable nonReentrant whenNotPaused {
        require(msg.value > 0, "Must deposit more than 0 ETH");

        // Cyan collecting service fee from deposits
        uint256 cyanServiceFee = (msg.value * _serviceFeePercent) / 10000;

        uint256 depositedAmount = msg.value - cyanServiceFee;
        uint256 mintAmount = calculateTokenByETH(depositedAmount);

        REMAINING_AMOUNT += depositedAmount;
        COLLECTED_SERVICE_FEE_AMOUNT += cyanServiceFee;
        _cyanVaultTokenContract.mint(msg.sender, mintAmount);

        emit DepositETH(msg.sender, depositedAmount, mintAmount);
    }

    // Cyan lends money from Vault to do BNPL or PAWN
    function lend(address to, uint256 amount)
        external
        nonReentrant
        whenNotPaused
        onlyRole(CYAN_PAYMENT_PLAN_ROLE)
    {
        uint256 maxWithdrableAmount = getMaxWithdrawableAmount();
        require(amount <= maxWithdrableAmount, "Not enough ETH in the Vault");

        LOANED_AMOUNT += amount;
        REMAINING_AMOUNT -= amount;
        payable(to).transfer(amount);

        emit Lend(to, amount);
    }

    // Cyan Payment Plan contract transfers paid amount back to Vault
    function earn(uint256 amount, uint256 profit)
        external
        payable
        nonReentrant
        onlyRole(CYAN_PAYMENT_PLAN_ROLE)
    {
        require(msg.value == amount + profit, "Wrong tranfer amount");

        REMAINING_AMOUNT += msg.value;
        if (LOANED_AMOUNT >= amount) {
            LOANED_AMOUNT -= amount;
        } else {
            LOANED_AMOUNT = 0;
        }

        emit Earn(amount, profit);
    }

    // When BNPL or PAWN plan defaults
    function nftDefaulted(uint256 unpaidAmount, uint256 estimatedPriceOfNFT)
        external
        nonReentrant
        onlyRole(CYAN_PAYMENT_PLAN_ROLE)
    {
        DEFAULTED_NFT_ASSET_AMOUNT += estimatedPriceOfNFT;

        if (LOANED_AMOUNT >= unpaidAmount) {
            LOANED_AMOUNT -= unpaidAmount;
        } else {
            LOANED_AMOUNT = 0;
        }

        emit NftDefaulted(unpaidAmount, estimatedPriceOfNFT);
    }

    // Liquidating defaulted BNPL or PAWN token and tranferred sold amount to Vault
    function liquidateNFT(uint256 totalDefaultedNFTAmount)
        external
        payable
        whenNotPaused
        onlyRole(CYAN_ROLE)
    {
        REMAINING_AMOUNT += msg.value;
        DEFAULTED_NFT_ASSET_AMOUNT = totalDefaultedNFTAmount;

        emit NftLiquidated(msg.value, totalDefaultedNFTAmount);
    }

    // User unstakes tokenAmount of tokens and gets back ETH
    function withdraw(uint256 amount) external nonReentrant whenNotPaused {
        require(amount > 0, "Non-positive token amount");

        uint256 balance = _cyanVaultTokenContract.balanceOf(msg.sender);
        require(balance >= amount, "Check the token balance");

        uint256 withdrawableTokenBalance = getWithdrawableBalance(msg.sender);
        require(
            amount <= withdrawableTokenBalance,
            "Not enough active balance in Cyan Vault"
        );

        uint256 withdrawETHAmount = calculateETHByToken(amount);

        REMAINING_AMOUNT -= withdrawETHAmount;
        _cyanVaultTokenContract.burn(msg.sender, amount);
        payable(msg.sender).transfer(withdrawETHAmount);

        emit WithdrawETH(msg.sender, withdrawETHAmount, amount);
    }

    // Cyan updating total amount of defaulted NFT assets
    function updateDefaultedNFTAssetAmount(uint256 amount)
        external
        whenNotPaused
        onlyRole(CYAN_ROLE)
    {
        DEFAULTED_NFT_ASSET_AMOUNT = amount;
        emit UpdatedDefaultedNFTAssetAmount(amount);
    }

    // Get defaulted NFT from Vault to Cyan Admin account
    function getDefaultedNFT(address contractAddress, uint256 tokenId)
        external
        nonReentrant
        whenNotPaused
        onlyRole(CYAN_ROLE)
    {
        require(contractAddress != address(0), "Zero contract address");

        IERC721 originalContract = IERC721(contractAddress);

        require(
            originalContract.ownerOf(tokenId) == address(this),
            "Vault isn't owner of the token"
        );

        originalContract.safeTransferFrom(address(this), msg.sender, tokenId);

        emit GetDefaultedNFT(msg.sender, contractAddress, tokenId);
    }

    function getWithdrawableBalance(address user)
        public
        view
        returns (uint256)
    {
        uint256 tokenBalance = _cyanVaultTokenContract.balanceOf(user);
        uint256 ethAmountForToken = calculateETHByToken(tokenBalance);
        uint256 maxWithdrawableAmount = getMaxWithdrawableAmount();

        if (ethAmountForToken <= maxWithdrawableAmount) {
            return tokenBalance;
        }
        return calculateTokenByETH(maxWithdrawableAmount);
    }

    function getMaxWithdrawableAmount() public view returns (uint256) {
        uint256 util = ((LOANED_AMOUNT + DEFAULTED_NFT_ASSET_AMOUNT) *
            _safetyFundPercent) / 10000;
        if (REMAINING_AMOUNT > util) {
            return REMAINING_AMOUNT - util;
        }
        return 0;
    }

    function getCurrentAssetAmounts()
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        return (
            REMAINING_AMOUNT,
            LOANED_AMOUNT,
            DEFAULTED_NFT_ASSET_AMOUNT,
            COLLECTED_SERVICE_FEE_AMOUNT,
            _stEthTokenContract.balanceOf(address(this))
        );
    }

    function calculateTokenByETH(uint256 amount) public view returns (uint256) {
        (uint256 totalETH, uint256 totalToken) = getTotalEthAndToken();
        return (amount * totalToken) / totalETH;
    }

    function calculateETHByToken(uint256 amount) public view returns (uint256) {
        (uint256 totalETH, uint256 totalToken) = getTotalEthAndToken();
        return (amount * totalETH) / totalToken;
    }

    function getTotalEthAndToken() private view returns (uint256, uint256) {
        uint256 vaultStEthBalance = _stEthTokenContract.balanceOf(
            address(this)
        );
        uint256 stEthInEth = _stableSwapSTETHContract.get_dy(
            1,
            0,
            vaultStEthBalance
        );
        uint256 totalETH = REMAINING_AMOUNT +
            LOANED_AMOUNT +
            DEFAULTED_NFT_ASSET_AMOUNT +
            stEthInEth;
        uint256 totalToken = _cyanVaultTokenContract.totalSupply();

        return (totalETH, totalToken);
    }

    function exchangeEthToStEth(uint256 ethAmount, uint256 minStEthAmount)
        external
        nonReentrant
        onlyRole(CYAN_BALANCER_ROLE)
    {
        require(ethAmount > 0, "Exchanging ETH amount is zero");
        require(
            ethAmount <= REMAINING_AMOUNT,
            "Cannot exchange more than REMAINING_AMOUNT"
        );
        // Exchanging ETH to stETH
        uint256 receivedStEthAmount = _stableSwapSTETHContract.exchange{
            value: ethAmount
        }(0, 1, ethAmount, minStEthAmount);
        REMAINING_AMOUNT -= ethAmount;
        emit ExchangedEthToStEth(ethAmount, receivedStEthAmount);
    }

    function exchangeStEthToEth(uint256 stEthAmount, uint256 minEthAmount)
        external
        nonReentrant
        onlyRole(CYAN_BALANCER_ROLE)
    {
        require(stEthAmount > 0, "Exchanging stETH amount is zero");
        // Exchanging stETH to ETH
        _stEthTokenContract.approve(
            address(_stableSwapSTETHContract),
            stEthAmount
        );
        uint256 receivedEthAmount = _stableSwapSTETHContract.exchange(
            1,
            0,
            stEthAmount,
            minEthAmount
        );
        emit ExchangedStEthToEth(stEthAmount, receivedEthAmount);
    }

    function updateSafetyFundPercent(uint256 safetyFundPercent)
        external
        nonReentrant
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        require(
            safetyFundPercent <= 10000,
            "Safety fund percent must be equal or less than 100 percent"
        );
        emit UpdatedSafetyFundPercent(_safetyFundPercent, safetyFundPercent);
        _safetyFundPercent = safetyFundPercent;
    }

    function updateServiceFeePercent(uint256 serviceFeePercent)
        external
        nonReentrant
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        require(
            serviceFeePercent <= 200,
            "Service fee percent must not be greater than 2 percent"
        );
        emit UpdatedServiceFeePercent(_serviceFeePercent, serviceFeePercent);
        _serviceFeePercent = serviceFeePercent;
    }

    function collectServiceFee(uint256 amount)
        external
        nonReentrant
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        require(
            amount <= COLLECTED_SERVICE_FEE_AMOUNT,
            "Not enough collected service fee"
        );
        COLLECTED_SERVICE_FEE_AMOUNT -= amount;
        payable(msg.sender).transfer(amount);
    }

    function withdrawAirDroppedERC20(address contractAddress, uint256 amount)
        external
        nonReentrant
        onlyRole(CYAN_ROLE)
    {
        require(
            contractAddress != address(_stEthTokenContract),
            "Cannot withdraw stETH"
        );
        IERC20 erc20Contract = IERC20(contractAddress);
        require(
            erc20Contract.balanceOf(address(this)) >= amount,
            "ERC20 balance not enough"
        );
        erc20Contract.transfer(msg.sender, amount);
    }

    function withdrawApprovedERC20(
        address contractAddress,
        address from,
        uint256 amount
    ) external nonReentrant onlyRole(CYAN_ROLE) {
        require(
            contractAddress != address(_stEthTokenContract),
            "Cannot withdraw stETH"
        );
        IERC20 erc20Contract = IERC20(contractAddress);
        require(
            erc20Contract.allowance(from, address(this)) >= amount,
            "ERC20 allowance not enough"
        );
        erc20Contract.transferFrom(from, msg.sender, amount);
    }

    receive() external payable {
        REMAINING_AMOUNT += msg.value;
        emit ReceivedETH(msg.value, msg.sender);
    }

    fallback() external payable {
        REMAINING_AMOUNT += msg.value;
        emit ReceivedETH(msg.value, msg.sender);
    }

    function pause() external nonReentrant onlyRole(DEFAULT_ADMIN_ROLE) {
        _pause();
    }

    function unpause() external nonReentrant onlyRole(DEFAULT_ADMIN_ROLE) {
        _unpause();
    }
}

File 2 of 17 : AccessControl.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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, _msgSender());
        _;
    }

    /**
     * @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 override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @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 {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " 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 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.
     */
    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.
     */
    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`.
     */
    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.
     *
     * [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.
     */
    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.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

File 3 of 17 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 4 of 17 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

File 5 of 17 : ERC721Holder.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)

pragma solidity ^0.8.0;

import "../IERC721Receiver.sol";

/**
 * @dev Implementation of the {IERC721Receiver} interface.
 *
 * Accepts all token transfers.
 * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
 */
contract ERC721Holder is IERC721Receiver {
    /**
     * @dev See {IERC721Receiver-onERC721Received}.
     *
     * Always returns `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
}

File 6 of 17 : Pausable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

File 7 of 17 : CyanVaultTokenV1.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

import '@openzeppelin/contracts/access/AccessControl.sol';
import '@openzeppelin/contracts/token/ERC20/ERC20.sol';

contract CyanVaultTokenV1 is AccessControl, ERC20 {
    bytes32 public constant CYAN_VAULT_ROLE = keccak256('CYAN_VAULT_ROLE');

    constructor(
        string memory name,
        string memory symbol,
        uint256 initialSupply,
        address cyanSuperAdmin
    ) ERC20(name, symbol) {
        _mint(cyanSuperAdmin, initialSupply);
        _setupRole(DEFAULT_ADMIN_ROLE, cyanSuperAdmin);
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }

    function mint(address to, uint256 amount)
        external
        onlyRole(CYAN_VAULT_ROLE)
    {
        require(to != address(0), 'Mint to the zero address');
        _mint(to, amount);
    }

    function burn(address from, uint256 amount)
        external
        onlyRole(CYAN_VAULT_ROLE)
    {
        require(balanceOf(from) >= amount, 'Balance not enough');
        _burn(from, amount);
    }

    function burnAdminToken(uint256 amount)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        require(balanceOf(msg.sender) >= amount, 'Balance not enough');
        _burn(msg.sender, amount);
    }
}

File 8 of 17 : IStableSwapSTETH.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

interface IStableSwapSTETH {
    /**
     * @notice Perform an exchange between two coins
     * @dev Index values can be found via the `coins` public getter method
     * @param i Index value for the coin to send
     * @param j Index valie of the coin to recieve
     * @param dx Amount of `i` being exchanged
     * @param min_dy Minimum amount of `j` to receive
     * @return Actual amount of `j` received
     */
    function exchange(
        int128 i,
        int128 j,
        uint256 dx,
        uint256 min_dy
    ) external payable returns (uint256);

    function get_dy(
        int128 i,
        int128 j,
        uint256 dx
    ) external view returns (uint256);
}

File 9 of 17 : 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 10 of 17 : 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 11 of 17 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @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] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

File 12 of 17 : 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 13 of 17 : 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 14 of 17 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

File 15 of 17 : ERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

File 16 of 17 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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);
}

File 17 of 17 : 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);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 500
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CYAN_PAYMENT_PLAN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CYAN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_cyanVaultTokenAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_safetyFundPercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_serviceFeePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"calculateETHByToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"calculateTokenByETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"collectServiceFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"depositETH","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"profit","type":"uint256"}],"name":"earn","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"ethAmount","type":"uint256"},{"internalType":"uint256","name":"minStEthAmount","type":"uint256"}],"name":"exchangeEthToStEth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"stEthAmount","type":"uint256"},{"internalType":"uint256","name":"minEthAmount","type":"uint256"}],"name":"exchangeStEthToEth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getCurrentAssetAmounts","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"contractAddress","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getDefaultedNFT","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getMaxWithdrawableAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"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":"user","type":"address"}],"name":"getWithdrawableBalance","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":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"lend","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"totalDefaultedNFTAmount","type":"uint256"}],"name":"liquidateNFT","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"unpaidAmount","type":"uint256"},{"internalType":"uint256","name":"estimatedPriceOfNFT","type":"uint256"}],"name":"nftDefaulted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","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":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"updateDefaultedNFTAssetAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"safetyFundPercent","type":"uint256"}],"name":"updateSafetyFundPercent","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"serviceFeePercent","type":"uint256"}],"name":"updateServiceFeePercent","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"contractAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawAirDroppedERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"contractAddress","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawApprovedERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

00000000000000000000000002ebb5924266b0fa7d11a01c019ce4f9c7e95a13000000000000000000000000ae82acbf3cecff7a85582b07b0db8da39d583e07000000000000000000000000ae7ab96520de3a18e5e111b5eaab095312d7fe84000000000000000000000000dc24316b9ae028f1497c275eb9192a3ea0f6702200000000000000000000000059d0cf44afc131db06420b1cf1583286ae7631f900000000000000000000000000000000000000000000000000000000000007d0000000000000000000000000000000000000000000000000000000000000001e

-----Decoded View---------------
Arg [0] : cyanVaultTokenAddress (address): 0x02ebB5924266b0FA7D11a01C019cE4f9c7E95A13
Arg [1] : cyanPaymentPlanAddress (address): 0xAe82aCBf3cECFf7A85582b07B0DB8DA39d583e07
Arg [2] : stEthTokenAddress (address): 0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84
Arg [3] : curveStableSwapStEthAddress (address): 0xDC24316b9AE028F1497c275EB9192a3Ea0f67022
Arg [4] : cyanSuperAdmin (address): 0x59D0Cf44AfC131db06420b1Cf1583286ae7631F9
Arg [5] : safetyFundPercent (uint256): 2000
Arg [6] : serviceFeePercent (uint256): 30

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 00000000000000000000000002ebb5924266b0fa7d11a01c019ce4f9c7e95a13
Arg [1] : 000000000000000000000000ae82acbf3cecff7a85582b07b0db8da39d583e07
Arg [2] : 000000000000000000000000ae7ab96520de3a18e5e111b5eaab095312d7fe84
Arg [3] : 000000000000000000000000dc24316b9ae028f1497c275eb9192a3ea0f67022
Arg [4] : 00000000000000000000000059d0cf44afc131db06420b1cf1583286ae7631f9
Arg [5] : 00000000000000000000000000000000000000000000000000000000000007d0
Arg [6] : 000000000000000000000000000000000000000000000000000000000000001e


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.