Contract 0x12Cb3F4e80b795bc77090A7c412B1f804Ee085a8

 
 
Txn Hash
Method
Block
From
To
Value
0x82d0c4b99dfae0d6d15bbfdb357babb12219468b0eeedac3efb7c3a1ec32d43b0x60806040133259392021-09-30 8:09:26483 days 23 hrs agoPaladin: Deployer IN  Create: BasicDelegator0 Ether0.07808814 88.41721899
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Contract Source Code Verified (Exact Match)

Contract Name:
BasicDelegator

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 25000 runs

Other Settings:
default evmVersion
File 1 of 7 : BasicDelegator.sol
//██████╗  █████╗ ██╗      █████╗ ██████╗ ██╗███╗   ██╗
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//╚═╝     ╚═╝  ╚═╝╚══════╝╚═╝  ╚═╝╚═════╝ ╚═╝╚═╝  ╚═══╝
                                                     

pragma solidity ^0.7.6;
//SPDX-License-Identifier: MIT

import "../utils/IERC20.sol";
import "../utils/SafeERC20.sol";
import "../utils/SafeMath.sol";
import "../tokens/ICompLike.sol";
import {Errors} from  "../utils/Errors.sol";

/** @title Basic Governance token Delegator (Governor Alpha version)  */
/// @author Paladin
contract BasicDelegator {
    using SafeMath for uint;
    using SafeERC20 for IERC20;

    //Variables

    /** @notice Address of the underlying token for this loan */
    address public underlying;
    /** @notice Amount of the underlying token in this loan */
    uint public amount;
    /** @notice Address of the borrower */
    address public borrower;
    /** @notice Address of the delegatee for the voting power */
    address public delegatee;
    /** @notice PalPool that created this loan */
    address payable public motherPool;
    /** @notice Amount of fees paid for this loan */
    uint public feesAmount;

    constructor(){
        //Set up initial values
        motherPool = payable(address(0xdead));
        
    }

    modifier motherPoolOnly() {
        require(msg.sender == motherPool);
        _;
    }

    /**
    * @notice Starts the Loan and Delegate the voting Power to the Delegatee
    * @dev Sets the amount values for the Loan, then delegate the voting power to the Delegatee
    * @param _delegatee Address to delegate the voting power to
    * @param _amount Amount of the underlying token for this loan
    * @param _feesAmount Amount of fees (in the underlying token) paid by the borrower
    * @return bool : Power Delagation success
    */
    function initiate(
        address _motherPool,
        address _borrower,
        address _underlying,
        address _delegatee,
        uint _amount,
        uint _feesAmount
    ) external returns(bool){
        require(motherPool == address(0));

        motherPool = payable(_motherPool);
        borrower = _borrower;
        underlying = _underlying;

        //Set up the borrowed amount and the amount of fees paid
        amount = _amount;
        feesAmount = _feesAmount;
        delegatee = _delegatee;
        
        //Delegate governance power : Governor Alpha version
        ICompLike govToken = ICompLike(underlying);
        govToken.delegate(_delegatee);
        return true;
    }

    /**
    * @notice Increases the amount of fees paid to expand the Loan
    * @dev Updates the feesAmount value for this Loan
    * @param _newFeesAmount new Amount of fees paid by the Borrower
    * @return bool : Expand success
    */
    function expand(uint _newFeesAmount) external motherPoolOnly returns(bool){
        feesAmount = feesAmount.add(_newFeesAmount);
        return true;
    }

    /**
    * @notice Closes a Loan, and returns the non-used fees to the Borrower
    * @dev Return the non-used fees to the Borrower, the loaned tokens and the used fees to the PalPool, then destroy the contract
    * @param _usedAmount Amount of fees to be used as interest for the Loan
    */
    function closeLoan(uint _usedAmount) external motherPoolOnly {
        IERC20 _underlying = IERC20(underlying);
        
        //Return the remaining amount to the borrower
        //Then return the borrowed amount and the used fees to the pool
        uint _returnAmount = feesAmount.sub(_usedAmount);
        uint _balance = _underlying.balanceOf(address(this));
        uint _keepAmount = _balance.sub(_returnAmount);
        if(_returnAmount > 0){
            _underlying.safeTransfer(borrower, _returnAmount);
        }
        _underlying.safeTransfer(motherPool, _keepAmount);

         //Destruct the contract, so it's not usable anymore
        selfdestruct(motherPool);
    }

    /**
    * @notice Kills a Loan, and reward the Killer a part of the fees of the Loan
    * @dev Send the reward fees to the Killer, then return the loaned tokens and the fees to the PalPool, and destroy the contract
    * @param _killer Address of the Loan Killer
    * @param _killerRatio Percentage of the fees to reward to the killer (scale 1e18)
    */
    function killLoan(address _killer, uint _killerRatio) external motherPoolOnly {
        IERC20 _underlying = IERC20(underlying);
        
        //Send the killer reward to the killer
        //Then return the borrowed amount and the fees to the pool
        uint _killerAmount = feesAmount.mul(_killerRatio).div(uint(1e18));
        uint _balance = _underlying.balanceOf(address(this));
        uint _poolAmount = _balance.sub(_killerAmount);
        _underlying.safeTransfer(_killer, _killerAmount);
        _underlying.safeTransfer(motherPool, _poolAmount);

         //Destruct the contract, so it's not usable anymore
        selfdestruct(motherPool);
    }


    /**
    * @notice Change the voring power delegatee
    * @dev Update the delegatee and delegate him the voting power
    * @param _delegatee Address to delegate the voting power to
    * @return bool : Power Delagation success
    */
    function changeDelegatee(address _delegatee) external motherPoolOnly returns(bool){
        delegatee = _delegatee;
        
        //Delegate governance power : Governor Alpha version
        ICompLike govToken = ICompLike(underlying);
        govToken.delegate(_delegatee);
        return true;
    }

}

File 2 of 7 : IERC20.sol
// SPDX-License-Identifier: agpl-3.0
pragma solidity ^0.7.6;

/**
 * @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 3 of 7 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.6;

import "./IERC20.sol";
import "./SafeMath.sol";
import "./Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 4 of 7 : SafeMath.sol
pragma solidity ^0.7.6;
//SPDX-License-Identifier: MIT

// From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol
// Subject to the MIT license.

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting with custom message on overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, errorMessage);

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot underflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction underflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot underflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, errorMessage);

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers.
     * Reverts on division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers.
     * Reverts with custom message on division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

File 5 of 7 : ICompLike.sol
pragma solidity ^0.7.6;
//SPDX-License-Identifier: MIT

interface ICompLike {
    function delegate(address delegatee) external;
    function getCurrentVotes(address account) external view returns (uint96);
}

File 6 of 7 : Errors.sol
//██████╗  █████╗ ██╗      █████╗ ██████╗ ██╗███╗   ██╗
//██╔══██╗██╔══██╗██║     ██╔══██╗██╔══██╗██║████╗  ██║
//██████╔╝███████║██║     ███████║██║  ██║██║██╔██╗ ██║
//██╔═══╝ ██╔══██║██║     ██╔══██║██║  ██║██║██║╚██╗██║
//██║     ██║  ██║███████╗██║  ██║██████╔╝██║██║ ╚████║
//╚═╝     ╚═╝  ╚═╝╚══════╝╚═╝  ╚═╝╚═════╝ ╚═╝╚═╝  ╚═══╝
                                                     

pragma solidity ^0.7.6;
//SPDX-License-Identifier: MIT

library Errors {
    // Admin error
    string public constant CALLER_NOT_ADMIN = '1'; // 'The caller must be the admin'
    string public constant CALLER_NOT_CONTROLLER = '29'; // 'The caller must be the admin or the controller'
    string public constant CALLER_NOT_ALLOWED_POOL = '30';  // 'The caller must be a palPool listed in the controller'
    string public constant CALLER_NOT_MINTER = '31';

    // ERC20 type errors
    string public constant FAIL_TRANSFER = '2';
    string public constant FAIL_TRANSFER_FROM = '3';
    string public constant BALANCE_TOO_LOW = '4';
    string public constant ALLOWANCE_TOO_LOW = '5';
    string public constant SELF_TRANSFER = '6';

    // PalPool errors
    string public constant INSUFFICIENT_CASH = '9';
    string public constant INSUFFICIENT_BALANCE = '10';
    string public constant FAIL_DEPOSIT = '11';
    string public constant FAIL_LOAN_INITIATE = '12';
    string public constant FAIL_BORROW = '13';
    string public constant ZERO_BORROW = '27';
    string public constant BORROW_INSUFFICIENT_FEES = '23';
    string public constant LOAN_CLOSED = '14';
    string public constant NOT_LOAN_OWNER = '15';
    string public constant LOAN_OWNER = '16';
    string public constant FAIL_LOAN_EXPAND = '17';
    string public constant NOT_KILLABLE = '18';
    string public constant RESERVE_FUNDS_INSUFFICIENT = '19';
    string public constant FAIL_MINT = '20';
    string public constant FAIL_BURN = '21';
    string public constant FAIL_WITHDRAW = '24';
    string public constant FAIL_CLOSE_BORROW = '25';
    string public constant FAIL_KILL_BORROW = '26';
    string public constant ZERO_ADDRESS = '22';
    string public constant INVALID_PARAMETERS = '28'; 
    string public constant FAIL_LOAN_DELEGATEE_CHANGE = '32';
    string public constant FAIL_LOAN_TOKEN_BURN = '33';
    string public constant FEES_ACCRUED_INSUFFICIENT = '34';

}

File 7 of 7 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.6;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 25000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"amount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"borrower","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_delegatee","type":"address"}],"name":"changeDelegatee","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_usedAmount","type":"uint256"}],"name":"closeLoan","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"delegatee","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newFeesAmount","type":"uint256"}],"name":"expand","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"feesAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_motherPool","type":"address"},{"internalType":"address","name":"_borrower","type":"address"},{"internalType":"address","name":"_underlying","type":"address"},{"internalType":"address","name":"_delegatee","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint256","name":"_feesAmount","type":"uint256"}],"name":"initiate","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_killer","type":"address"},{"internalType":"uint256","name":"_killerRatio","type":"uint256"}],"name":"killLoan","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"motherPool","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"underlying","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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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.