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Accept Ownership | 20961544 | 24 days ago | IN | 0 ETH | 0.00028544 | ||||
Nominate New Own... | 20961153 | 24 days ago | IN | 0 ETH | 0.00042744 | ||||
Accept Ownership | 19700805 | 200 days ago | IN | 0 ETH | 0.00017126 | ||||
Nominate New Own... | 19700728 | 200 days ago | IN | 0 ETH | 0.00028496 | ||||
Accept Ownership | 15674058 | 765 days ago | IN | 0 ETH | 0.0001998 | ||||
Nominate New Own... | 15673993 | 765 days ago | IN | 0 ETH | 0.00037995 | ||||
0x60806040 | 13003015 | 1184 days ago | IN | 0 ETH | 0.2421445 |
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Contract Name:
CollateralShort
Compiler Version
v0.5.16+commit.9c3226ce
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2021-08-11 */ /* ___ _ ___ _ | .\ ___ _ _ <_> ___ | __><_>._ _ ___ ._ _ ___ ___ | _// ._>| '_>| ||___|| _> | || ' |<_> || ' |/ | '/ ._> |_| \___.|_| |_| |_| |_||_|_|<___||_|_|\_|_.\___. * PeriFinance: CollateralShort.sol * * Latest source (may be newer): https://github.com/perifinance/peri-finance/blob/master/contracts/CollateralShort.sol * Docs: Will be added in the future. * https://docs.peri.finance/contracts/source/contracts/CollateralShort * * Contract Dependencies: * - Collateral * - IAddressResolver * - ICollateralLoan * - MixinResolver * - MixinSystemSettings * - Owned * - State * Libraries: * - SafeDecimalMath * - SafeMath * * MIT License * =========== * * Copyright (c) 2021 PeriFinance * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */ pragma solidity 0.5.16; // https://docs.peri.finance/contracts/source/contracts/owned contract Owned { address public owner; address public nominatedOwner; constructor(address _owner) public { require(_owner != address(0), "Owner address cannot be 0"); owner = _owner; emit OwnerChanged(address(0), _owner); } function nominateNewOwner(address _owner) external onlyOwner { nominatedOwner = _owner; emit OwnerNominated(_owner); } function acceptOwnership() external { require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership"); emit OwnerChanged(owner, nominatedOwner); owner = nominatedOwner; nominatedOwner = address(0); } modifier onlyOwner { _onlyOwner(); _; } function _onlyOwner() private view { require(msg.sender == owner, "Only the contract owner may perform this action"); } event OwnerNominated(address newOwner); event OwnerChanged(address oldOwner, address newOwner); } // https://docs.peri.finance/contracts/source/interfaces/iaddressresolver interface IAddressResolver { function getAddress(bytes32 name) external view returns (address); function getPynth(bytes32 key) external view returns (address); function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address); } // https://docs.peri.finance/contracts/source/interfaces/ipynth interface IPynth { // Views function currencyKey() external view returns (bytes32); function transferablePynths(address account) external view returns (uint); // Mutative functions function transferAndSettle(address to, uint value) external returns (bool); function transferFromAndSettle( address from, address to, uint value ) external returns (bool); // Restricted: used internally to PeriFinance function burn(address account, uint amount) external; function issue(address account, uint amount) external; } // https://docs.peri.finance/contracts/source/interfaces/iissuer interface IIssuer { // Views function anyPynthOrPERIRateIsInvalid() external view returns (bool anyRateInvalid); function availableCurrencyKeys() external view returns (bytes32[] memory); function availablePynthCount() external view returns (uint); function availablePynths(uint index) external view returns (IPynth); function canBurnPynths(address account) external view returns (bool); function collateral(address account) external view returns (uint); function collateralisationRatio(address issuer) external view returns (uint); function collateralisationRatioAndAnyRatesInvalid(address _issuer) external view returns (uint cratio, bool anyRateIsInvalid); function debtBalanceOf(address issuer, bytes32 currencyKey) external view returns (uint debtBalance); function issuanceRatio() external view returns (uint); function externalTokenLimit() external view returns (uint); function lastIssueEvent(address account) external view returns (uint); function maxIssuablePynths(address issuer) external view returns (uint maxIssuable); function externalTokenQuota( address _account, uint _addtionalpUSD, uint _addtionalExToken, bool _isIssue ) external view returns (uint); function maxExternalTokenStakeAmount(address _account, bytes32 _currencyKey) external view returns (uint issueAmountToQuota, uint stakeAmountToQuota); function minimumStakeTime() external view returns (uint); function remainingIssuablePynths(address issuer) external view returns ( uint maxIssuable, uint alreadyIssued, uint totalSystemDebt ); function pynths(bytes32 currencyKey) external view returns (IPynth); function getPynths(bytes32[] calldata currencyKeys) external view returns (IPynth[] memory); function pynthsByAddress(address pynthAddress) external view returns (bytes32); function totalIssuedPynths(bytes32 currencyKey, bool excludeEtherCollateral) external view returns (uint); function transferablePeriFinanceAndAnyRateIsInvalid(address account, uint balance) external view returns (uint transferable, bool anyRateIsInvalid); // Restricted: used internally to PeriFinance function issuePynths( address _issuer, bytes32 _currencyKey, uint _issueAmount ) external; function issueMaxPynths(address _issuer) external; function issuePynthsToMaxQuota(address _issuer, bytes32 _currencyKey) external; function burnPynths( address _from, bytes32 _currencyKey, uint _burnAmount ) external; function fitToClaimable(address _from) external; function exit(address _from) external; function liquidateDelinquentAccount( address account, uint pusdAmount, address liquidator ) external returns (uint totalRedeemed, uint amountToLiquidate); } // Inheritance // Internal references // https://docs.peri.finance/contracts/source/contracts/addressresolver contract AddressResolver is Owned, IAddressResolver { mapping(bytes32 => address) public repository; constructor(address _owner) public Owned(_owner) {} /* ========== RESTRICTED FUNCTIONS ========== */ function importAddresses(bytes32[] calldata names, address[] calldata destinations) external onlyOwner { require(names.length == destinations.length, "Input lengths must match"); for (uint i = 0; i < names.length; i++) { bytes32 name = names[i]; address destination = destinations[i]; repository[name] = destination; emit AddressImported(name, destination); } } /* ========= PUBLIC FUNCTIONS ========== */ function rebuildCaches(MixinResolver[] calldata destinations) external { for (uint i = 0; i < destinations.length; i++) { destinations[i].rebuildCache(); } } /* ========== VIEWS ========== */ function areAddressesImported(bytes32[] calldata names, address[] calldata destinations) external view returns (bool) { for (uint i = 0; i < names.length; i++) { if (repository[names[i]] != destinations[i]) { return false; } } return true; } function getAddress(bytes32 name) external view returns (address) { return repository[name]; } function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address) { address _foundAddress = repository[name]; require(_foundAddress != address(0), reason); return _foundAddress; } function getPynth(bytes32 key) external view returns (address) { IIssuer issuer = IIssuer(repository["Issuer"]); require(address(issuer) != address(0), "Cannot find Issuer address"); return address(issuer.pynths(key)); } /* ========== EVENTS ========== */ event AddressImported(bytes32 name, address destination); } // solhint-disable payable-fallback // https://docs.peri.finance/contracts/source/contracts/readproxy contract ReadProxy is Owned { address public target; constructor(address _owner) public Owned(_owner) {} function setTarget(address _target) external onlyOwner { target = _target; emit TargetUpdated(target); } function() external { // The basics of a proxy read call // Note that msg.sender in the underlying will always be the address of this contract. assembly { calldatacopy(0, 0, calldatasize) // Use of staticcall - this will revert if the underlying function mutates state let result := staticcall(gas, sload(target_slot), 0, calldatasize, 0, 0) returndatacopy(0, 0, returndatasize) if iszero(result) { revert(0, returndatasize) } return(0, returndatasize) } } event TargetUpdated(address newTarget); } // Inheritance // Internal references // https://docs.peri.finance/contracts/source/contracts/mixinresolver contract MixinResolver { AddressResolver public resolver; mapping(bytes32 => address) private addressCache; constructor(address _resolver) internal { resolver = AddressResolver(_resolver); } /* ========== INTERNAL FUNCTIONS ========== */ function combineArrays(bytes32[] memory first, bytes32[] memory second) internal pure returns (bytes32[] memory combination) { combination = new bytes32[](first.length + second.length); for (uint i = 0; i < first.length; i++) { combination[i] = first[i]; } for (uint j = 0; j < second.length; j++) { combination[first.length + j] = second[j]; } } /* ========== PUBLIC FUNCTIONS ========== */ // Note: this function is public not external in order for it to be overridden and invoked via super in subclasses function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {} function rebuildCache() public { bytes32[] memory requiredAddresses = resolverAddressesRequired(); // The resolver must call this function whenver it updates its state for (uint i = 0; i < requiredAddresses.length; i++) { bytes32 name = requiredAddresses[i]; // Note: can only be invoked once the resolver has all the targets needed added address destination = resolver.requireAndGetAddress(name, string(abi.encodePacked("Resolver missing target: ", name))); addressCache[name] = destination; emit CacheUpdated(name, destination); } } /* ========== VIEWS ========== */ function isResolverCached() external view returns (bool) { bytes32[] memory requiredAddresses = resolverAddressesRequired(); for (uint i = 0; i < requiredAddresses.length; i++) { bytes32 name = requiredAddresses[i]; // false if our cache is invalid or if the resolver doesn't have the required address if (resolver.getAddress(name) != addressCache[name] || addressCache[name] == address(0)) { return false; } } return true; } /* ========== INTERNAL FUNCTIONS ========== */ function requireAndGetAddress(bytes32 name) internal view returns (address) { address _foundAddress = addressCache[name]; require(_foundAddress != address(0), string(abi.encodePacked("Missing address: ", name))); return _foundAddress; } /* ========== EVENTS ========== */ event CacheUpdated(bytes32 name, address destination); } // https://docs.peri.finance/contracts/source/interfaces/iflexiblestorage interface IFlexibleStorage { // Views function getUIntValue(bytes32 contractName, bytes32 record) external view returns (uint); function getUIntValues(bytes32 contractName, bytes32[] calldata records) external view returns (uint[] memory); function getIntValue(bytes32 contractName, bytes32 record) external view returns (int); function getIntValues(bytes32 contractName, bytes32[] calldata records) external view returns (int[] memory); function getAddressValue(bytes32 contractName, bytes32 record) external view returns (address); function getAddressValues(bytes32 contractName, bytes32[] calldata records) external view returns (address[] memory); function getBoolValue(bytes32 contractName, bytes32 record) external view returns (bool); function getBoolValues(bytes32 contractName, bytes32[] calldata records) external view returns (bool[] memory); function getBytes32Value(bytes32 contractName, bytes32 record) external view returns (bytes32); function getBytes32Values(bytes32 contractName, bytes32[] calldata records) external view returns (bytes32[] memory); // Mutative functions function deleteUIntValue(bytes32 contractName, bytes32 record) external; function deleteIntValue(bytes32 contractName, bytes32 record) external; function deleteAddressValue(bytes32 contractName, bytes32 record) external; function deleteBoolValue(bytes32 contractName, bytes32 record) external; function deleteBytes32Value(bytes32 contractName, bytes32 record) external; function setUIntValue( bytes32 contractName, bytes32 record, uint value ) external; function setUIntValues( bytes32 contractName, bytes32[] calldata records, uint[] calldata values ) external; function setIntValue( bytes32 contractName, bytes32 record, int value ) external; function setIntValues( bytes32 contractName, bytes32[] calldata records, int[] calldata values ) external; function setAddressValue( bytes32 contractName, bytes32 record, address value ) external; function setAddressValues( bytes32 contractName, bytes32[] calldata records, address[] calldata values ) external; function setBoolValue( bytes32 contractName, bytes32 record, bool value ) external; function setBoolValues( bytes32 contractName, bytes32[] calldata records, bool[] calldata values ) external; function setBytes32Value( bytes32 contractName, bytes32 record, bytes32 value ) external; function setBytes32Values( bytes32 contractName, bytes32[] calldata records, bytes32[] calldata values ) external; } // Internal references // https://docs.peri.finance/contracts/source/contracts/mixinsystemsettings contract MixinSystemSettings is MixinResolver { bytes32 internal constant SETTING_CONTRACT_NAME = "SystemSettings"; bytes32 internal constant SETTING_WAITING_PERIOD_SECS = "waitingPeriodSecs"; bytes32 internal constant SETTING_PRICE_DEVIATION_THRESHOLD_FACTOR = "priceDeviationThresholdFactor"; bytes32 internal constant SETTING_ISSUANCE_RATIO = "issuanceRatio"; bytes32 internal constant SETTING_FEE_PERIOD_DURATION = "feePeriodDuration"; bytes32 internal constant SETTING_TARGET_THRESHOLD = "targetThreshold"; bytes32 internal constant SETTING_LIQUIDATION_DELAY = "liquidationDelay"; bytes32 internal constant SETTING_LIQUIDATION_RATIO = "liquidationRatio"; bytes32 internal constant SETTING_LIQUIDATION_PENALTY = "liquidationPenalty"; bytes32 internal constant SETTING_RATE_STALE_PERIOD = "rateStalePeriod"; bytes32 internal constant SETTING_EXCHANGE_FEE_RATE = "exchangeFeeRate"; bytes32 internal constant SETTING_MINIMUM_STAKE_TIME = "minimumStakeTime"; bytes32 internal constant SETTING_AGGREGATOR_WARNING_FLAGS = "aggregatorWarningFlags"; bytes32 internal constant SETTING_TRADING_REWARDS_ENABLED = "tradingRewardsEnabled"; bytes32 internal constant SETTING_DEBT_SNAPSHOT_STALE_TIME = "debtSnapshotStaleTime"; bytes32 internal constant SETTING_CROSS_DOMAIN_DEPOSIT_GAS_LIMIT = "crossDomainDepositGasLimit"; bytes32 internal constant SETTING_CROSS_DOMAIN_ESCROW_GAS_LIMIT = "crossDomainEscrowGasLimit"; bytes32 internal constant SETTING_CROSS_DOMAIN_REWARD_GAS_LIMIT = "crossDomainRewardGasLimit"; bytes32 internal constant SETTING_CROSS_DOMAIN_WITHDRAWAL_GAS_LIMIT = "crossDomainWithdrawalGasLimit"; bytes32 internal constant SETTING_EXTERNAL_TOKEN_QUOTA = "externalTokenQuota"; bytes32 internal constant CONTRACT_FLEXIBLESTORAGE = "FlexibleStorage"; enum CrossDomainMessageGasLimits {Deposit, Escrow, Reward, Withdrawal} constructor(address _resolver) internal MixinResolver(_resolver) {} function resolverAddressesRequired() public view returns (bytes32[] memory addresses) { addresses = new bytes32[](1); addresses[0] = CONTRACT_FLEXIBLESTORAGE; } function flexibleStorage() internal view returns (IFlexibleStorage) { return IFlexibleStorage(requireAndGetAddress(CONTRACT_FLEXIBLESTORAGE)); } function _getGasLimitSetting(CrossDomainMessageGasLimits gasLimitType) internal pure returns (bytes32) { if (gasLimitType == CrossDomainMessageGasLimits.Deposit) { return SETTING_CROSS_DOMAIN_DEPOSIT_GAS_LIMIT; } else if (gasLimitType == CrossDomainMessageGasLimits.Escrow) { return SETTING_CROSS_DOMAIN_ESCROW_GAS_LIMIT; } else if (gasLimitType == CrossDomainMessageGasLimits.Reward) { return SETTING_CROSS_DOMAIN_REWARD_GAS_LIMIT; } else if (gasLimitType == CrossDomainMessageGasLimits.Withdrawal) { return SETTING_CROSS_DOMAIN_WITHDRAWAL_GAS_LIMIT; } else { revert("Unknown gas limit type"); } } function getCrossDomainMessageGasLimit(CrossDomainMessageGasLimits gasLimitType) internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, _getGasLimitSetting(gasLimitType)); } function getTradingRewardsEnabled() internal view returns (bool) { return flexibleStorage().getBoolValue(SETTING_CONTRACT_NAME, SETTING_TRADING_REWARDS_ENABLED); } function getWaitingPeriodSecs() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_WAITING_PERIOD_SECS); } function getPriceDeviationThresholdFactor() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_PRICE_DEVIATION_THRESHOLD_FACTOR); } function getIssuanceRatio() internal view returns (uint) { // lookup on flexible storage directly for gas savings (rather than via SystemSettings) return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ISSUANCE_RATIO); } function getFeePeriodDuration() internal view returns (uint) { // lookup on flexible storage directly for gas savings (rather than via SystemSettings) return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_FEE_PERIOD_DURATION); } function getTargetThreshold() internal view returns (uint) { // lookup on flexible storage directly for gas savings (rather than via SystemSettings) return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_TARGET_THRESHOLD); } function getLiquidationDelay() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_DELAY); } function getLiquidationRatio() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_RATIO); } function getLiquidationPenalty() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_PENALTY); } function getRateStalePeriod() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_RATE_STALE_PERIOD); } function getExchangeFeeRate(bytes32 currencyKey) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_EXCHANGE_FEE_RATE, currencyKey)) ); } function getMinimumStakeTime() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_MINIMUM_STAKE_TIME); } function getAggregatorWarningFlags() internal view returns (address) { return flexibleStorage().getAddressValue(SETTING_CONTRACT_NAME, SETTING_AGGREGATOR_WARNING_FLAGS); } function getDebtSnapshotStaleTime() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_DEBT_SNAPSHOT_STALE_TIME); } function getExternalTokenQuota() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_EXTERNAL_TOKEN_QUOTA); } } pragma experimental ABIEncoderV2; interface ICollateralLoan { struct Loan { // ID for the loan uint id; // Acccount that created the loan address payable account; // Amount of collateral deposited uint collateral; // The pynth that was borowed bytes32 currency; // Amount of pynths borrowed uint amount; // Indicates if the position was short sold bool short; // interest amounts accrued uint accruedInterest; // last interest index uint interestIndex; // time of last interaction. uint lastInteraction; } } /** * @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 subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); 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-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); 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) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); 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) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } } // Libraries // https://docs.peri.finance/contracts/source/libraries/safedecimalmath library SafeDecimalMath { using SafeMath for uint; /* Number of decimal places in the representations. */ uint8 public constant decimals = 18; uint8 public constant highPrecisionDecimals = 27; /* The number representing 1.0. */ uint public constant UNIT = 10**uint(decimals); /* The number representing 1.0 for higher fidelity numbers. */ uint public constant PRECISE_UNIT = 10**uint(highPrecisionDecimals); uint private constant UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR = 10**uint(highPrecisionDecimals - decimals); /** * @return Provides an interface to UNIT. */ function unit() external pure returns (uint) { return UNIT; } /** * @return Provides an interface to PRECISE_UNIT. */ function preciseUnit() external pure returns (uint) { return PRECISE_UNIT; } /** * @return The result of multiplying x and y, interpreting the operands as fixed-point * decimals. * * @dev A unit factor is divided out after the product of x and y is evaluated, * so that product must be less than 2**256. As this is an integer division, * the internal division always rounds down. This helps save on gas. Rounding * is more expensive on gas. */ function multiplyDecimal(uint x, uint y) internal pure returns (uint) { /* Divide by UNIT to remove the extra factor introduced by the product. */ return x.mul(y) / UNIT; } /** * @return The result of safely multiplying x and y, interpreting the operands * as fixed-point decimals of the specified precision unit. * * @dev The operands should be in the form of a the specified unit factor which will be * divided out after the product of x and y is evaluated, so that product must be * less than 2**256. * * Unlike multiplyDecimal, this function rounds the result to the nearest increment. * Rounding is useful when you need to retain fidelity for small decimal numbers * (eg. small fractions or percentages). */ function _multiplyDecimalRound( uint x, uint y, uint precisionUnit ) private pure returns (uint) { /* Divide by UNIT to remove the extra factor introduced by the product. */ uint quotientTimesTen = x.mul(y) / (precisionUnit / 10); if (quotientTimesTen % 10 >= 5) { quotientTimesTen += 10; } return quotientTimesTen / 10; } /** * @return The result of safely multiplying x and y, interpreting the operands * as fixed-point decimals of a precise unit. * * @dev The operands should be in the precise unit factor which will be * divided out after the product of x and y is evaluated, so that product must be * less than 2**256. * * Unlike multiplyDecimal, this function rounds the result to the nearest increment. * Rounding is useful when you need to retain fidelity for small decimal numbers * (eg. small fractions or percentages). */ function multiplyDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) { return _multiplyDecimalRound(x, y, PRECISE_UNIT); } /** * @return The result of safely multiplying x and y, interpreting the operands * as fixed-point decimals of a standard unit. * * @dev The operands should be in the standard unit factor which will be * divided out after the product of x and y is evaluated, so that product must be * less than 2**256. * * Unlike multiplyDecimal, this function rounds the result to the nearest increment. * Rounding is useful when you need to retain fidelity for small decimal numbers * (eg. small fractions or percentages). */ function multiplyDecimalRound(uint x, uint y) internal pure returns (uint) { return _multiplyDecimalRound(x, y, UNIT); } /** * @return The result of safely dividing x and y. The return value is a high * precision decimal. * * @dev y is divided after the product of x and the standard precision unit * is evaluated, so the product of x and UNIT must be less than 2**256. As * this is an integer division, the result is always rounded down. * This helps save on gas. Rounding is more expensive on gas. */ function divideDecimal(uint x, uint y) internal pure returns (uint) { /* Reintroduce the UNIT factor that will be divided out by y. */ return x.mul(UNIT).div(y); } /** * @return The result of safely dividing x and y. The return value is as a rounded * decimal in the precision unit specified in the parameter. * * @dev y is divided after the product of x and the specified precision unit * is evaluated, so the product of x and the specified precision unit must * be less than 2**256. The result is rounded to the nearest increment. */ function _divideDecimalRound( uint x, uint y, uint precisionUnit ) private pure returns (uint) { uint resultTimesTen = x.mul(precisionUnit * 10).div(y); if (resultTimesTen % 10 >= 5) { resultTimesTen += 10; } return resultTimesTen / 10; } /** * @return The result of safely dividing x and y. The return value is as a rounded * standard precision decimal. * * @dev y is divided after the product of x and the standard precision unit * is evaluated, so the product of x and the standard precision unit must * be less than 2**256. The result is rounded to the nearest increment. */ function divideDecimalRound(uint x, uint y) internal pure returns (uint) { return _divideDecimalRound(x, y, UNIT); } /** * @return The result of safely dividing x and y. The return value is as a rounded * high precision decimal. * * @dev y is divided after the product of x and the high precision unit * is evaluated, so the product of x and the high precision unit must * be less than 2**256. The result is rounded to the nearest increment. */ function divideDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) { return _divideDecimalRound(x, y, PRECISE_UNIT); } /** * @dev Convert a standard decimal representation to a high precision one. */ function decimalToPreciseDecimal(uint i) internal pure returns (uint) { return i.mul(UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR); } /** * @dev Convert a high precision decimal to a standard decimal representation. */ function preciseDecimalToDecimal(uint i) internal pure returns (uint) { uint quotientTimesTen = i / (UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR / 10); if (quotientTimesTen % 10 >= 5) { quotientTimesTen += 10; } return quotientTimesTen / 10; } /** * @dev Round down the value with given number */ function roundDownDecimal(uint x, uint d) internal pure returns (uint) { return x.div(10**d).mul(10**d); } /** * @dev Round up the value with given number */ function roundUpDecimal(uint x, uint d) internal pure returns (uint) { uint _decimal = 10**d; if (x % _decimal > 0) { x = x.add(10**d); } return x.div(_decimal).mul(_decimal); } } // Inheritance // https://docs.peri.finance/contracts/source/contracts/state contract State is Owned { // the address of the contract that can modify variables // this can only be changed by the owner of this contract address public associatedContract; constructor(address _associatedContract) internal { // This contract is abstract, and thus cannot be instantiated directly require(owner != address(0), "Owner must be set"); associatedContract = _associatedContract; emit AssociatedContractUpdated(_associatedContract); } /* ========== SETTERS ========== */ // Change the associated contract to a new address function setAssociatedContract(address _associatedContract) external onlyOwner { associatedContract = _associatedContract; emit AssociatedContractUpdated(_associatedContract); } /* ========== MODIFIERS ========== */ modifier onlyAssociatedContract { require(msg.sender == associatedContract, "Only the associated contract can perform this action"); _; } /* ========== EVENTS ========== */ event AssociatedContractUpdated(address associatedContract); } // Inheritance // Libraries contract CollateralState is Owned, State, ICollateralLoan { using SafeMath for uint; using SafeDecimalMath for uint; mapping(address => Loan[]) public loans; constructor(address _owner, address _associatedContract) public Owned(_owner) State(_associatedContract) {} /* ========== VIEWS ========== */ // If we do not find the loan, this returns a struct with 0'd values. function getLoan(address account, uint256 loanID) external view returns (Loan memory) { Loan[] memory accountLoans = loans[account]; for (uint i = 0; i < accountLoans.length; i++) { if (accountLoans[i].id == loanID) { return (accountLoans[i]); } } } function getNumLoans(address account) external view returns (uint numLoans) { return loans[account].length; } /* ========== MUTATIVE FUNCTIONS ========== */ function createLoan(Loan memory loan) public onlyAssociatedContract { loans[loan.account].push(loan); } function updateLoan(Loan memory loan) public onlyAssociatedContract { Loan[] storage accountLoans = loans[loan.account]; for (uint i = 0; i < accountLoans.length; i++) { if (accountLoans[i].id == loan.id) { loans[loan.account][i] = loan; } } } } interface ICollateralManager { // Manager information function hasCollateral(address collateral) external view returns (bool); function isPynthManaged(bytes32 currencyKey) external view returns (bool); // State information function long(bytes32 pynth) external view returns (uint amount); function short(bytes32 pynth) external view returns (uint amount); function totalLong() external view returns (uint pusdValue, bool anyRateIsInvalid); function totalShort() external view returns (uint pusdValue, bool anyRateIsInvalid); function getBorrowRate() external view returns (uint borrowRate, bool anyRateIsInvalid); function getShortRate(bytes32 pynth) external view returns (uint shortRate, bool rateIsInvalid); function getRatesAndTime(uint index) external view returns ( uint entryRate, uint lastRate, uint lastUpdated, uint newIndex ); function getShortRatesAndTime(bytes32 currency, uint index) external view returns ( uint entryRate, uint lastRate, uint lastUpdated, uint newIndex ); function exceedsDebtLimit(uint amount, bytes32 currency) external view returns (bool canIssue, bool anyRateIsInvalid); function arePynthsAndCurrenciesSet(bytes32[] calldata requiredPynthNamesInResolver, bytes32[] calldata pynthKeys) external view returns (bool); function areShortablePynthsSet(bytes32[] calldata requiredPynthNamesInResolver, bytes32[] calldata pynthKeys) external view returns (bool); // Loans function getNewLoanId() external returns (uint id); // Manager mutative function addCollaterals(address[] calldata collaterals) external; function removeCollaterals(address[] calldata collaterals) external; function addPynths(bytes32[] calldata pynthNamesInResolver, bytes32[] calldata pynthKeys) external; function removePynths(bytes32[] calldata pynths, bytes32[] calldata pynthKeys) external; function addShortablePynths(bytes32[2][] calldata requiredPynthAndInverseNamesInResolver, bytes32[] calldata pynthKeys) external; function removeShortablePynths(bytes32[] calldata pynths) external; // State mutative function updateBorrowRates(uint rate) external; function updateShortRates(bytes32 currency, uint rate) external; function incrementLongs(bytes32 pynth, uint amount) external; function decrementLongs(bytes32 pynth, uint amount) external; function incrementShorts(bytes32 pynth, uint amount) external; function decrementShorts(bytes32 pynth, uint amount) external; } // https://docs.peri.finance/contracts/source/interfaces/isystemstatus interface ISystemStatus { struct Status { bool canSuspend; bool canResume; } struct Suspension { bool suspended; // reason is an integer code, // 0 => no reason, 1 => upgrading, 2+ => defined by system usage uint248 reason; } // Views function accessControl(bytes32 section, address account) external view returns (bool canSuspend, bool canResume); function requireSystemActive() external view; function requireIssuanceActive() external view; function requireExchangeActive() external view; function requireExchangeBetweenPynthsAllowed(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view; function requirePynthActive(bytes32 currencyKey) external view; function requirePynthsActive(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view; function systemSuspension() external view returns (bool suspended, uint248 reason); function issuanceSuspension() external view returns (bool suspended, uint248 reason); function exchangeSuspension() external view returns (bool suspended, uint248 reason); function pynthExchangeSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason); function pynthSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason); function getPynthExchangeSuspensions(bytes32[] calldata pynths) external view returns (bool[] memory exchangeSuspensions, uint256[] memory reasons); function getPynthSuspensions(bytes32[] calldata pynths) external view returns (bool[] memory suspensions, uint256[] memory reasons); // Restricted functions function suspendPynth(bytes32 currencyKey, uint256 reason) external; function updateAccessControl( bytes32 section, address account, bool canSuspend, bool canResume ) external; } // https://docs.peri.finance/contracts/source/interfaces/ifeepool interface IFeePool { // Views // solhint-disable-next-line func-name-mixedcase function FEE_ADDRESS() external view returns (address); function feesAvailable(address account) external view returns (uint, uint); function feePeriodDuration() external view returns (uint); function isFeesClaimable(address account) external view returns (bool); function targetThreshold() external view returns (uint); function totalFeesAvailable() external view returns (uint); function totalRewardsAvailable() external view returns (uint); // Mutative Functions function claimFees() external returns (bool); function claimOnBehalf(address claimingForAddress) external returns (bool); function closeCurrentFeePeriod() external; // Restricted: used internally to PeriFinance function appendAccountIssuanceRecord( address account, uint lockedAmount, uint debtEntryIndex ) external; function recordFeePaid(uint pUSDAmount) external; function setRewardsToDistribute(uint amount) external; } // https://docs.peri.finance/contracts/source/interfaces/ierc20 interface IERC20 { // ERC20 Optional Views function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); // Views function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); // Mutative functions function transfer(address to, uint value) external returns (bool); function approve(address spender, uint value) external returns (bool); function transferFrom( address from, address to, uint value ) external returns (bool); // Events event Transfer(address indexed from, address indexed to, uint value); event Approval(address indexed owner, address indexed spender, uint value); } // https://docs.peri.finance/contracts/source/interfaces/iexchangerates interface IExchangeRates { // Structs struct RateAndUpdatedTime { uint216 rate; uint40 time; } struct InversePricing { uint entryPoint; uint upperLimit; uint lowerLimit; bool frozenAtUpperLimit; bool frozenAtLowerLimit; } // Views function aggregators(bytes32 currencyKey) external view returns (address); function aggregatorWarningFlags() external view returns (address); function anyRateIsInvalid(bytes32[] calldata currencyKeys) external view returns (bool); function canFreezeRate(bytes32 currencyKey) external view returns (bool); function currentRoundForRate(bytes32 currencyKey) external view returns (uint); function currenciesUsingAggregator(address aggregator) external view returns (bytes32[] memory); function effectiveValue( bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey ) external view returns (uint value); function effectiveValueAndRates( bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey ) external view returns ( uint value, uint sourceRate, uint destinationRate ); function effectiveValueAtRound( bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, uint roundIdForSrc, uint roundIdForDest ) external view returns (uint value); function getCurrentRoundId(bytes32 currencyKey) external view returns (uint); function getLastRoundIdBeforeElapsedSecs( bytes32 currencyKey, uint startingRoundId, uint startingTimestamp, uint timediff ) external view returns (uint); function inversePricing(bytes32 currencyKey) external view returns ( uint entryPoint, uint upperLimit, uint lowerLimit, bool frozenAtUpperLimit, bool frozenAtLowerLimit ); function lastRateUpdateTimes(bytes32 currencyKey) external view returns (uint256); function oracle() external view returns (address); function rateAndTimestampAtRound(bytes32 currencyKey, uint roundId) external view returns (uint rate, uint time); function rateAndUpdatedTime(bytes32 currencyKey) external view returns (uint rate, uint time); function rateAndInvalid(bytes32 currencyKey) external view returns (uint rate, bool isInvalid); function rateForCurrency(bytes32 currencyKey) external view returns (uint); function rateIsFlagged(bytes32 currencyKey) external view returns (bool); function rateIsFrozen(bytes32 currencyKey) external view returns (bool); function rateIsInvalid(bytes32 currencyKey) external view returns (bool); function rateIsStale(bytes32 currencyKey) external view returns (bool); function rateStalePeriod() external view returns (uint); function ratesAndUpdatedTimeForCurrencyLastNRounds(bytes32 currencyKey, uint numRounds) external view returns (uint[] memory rates, uint[] memory times); function ratesAndInvalidForCurrencies(bytes32[] calldata currencyKeys) external view returns (uint[] memory rates, bool anyRateInvalid); function ratesForCurrencies(bytes32[] calldata currencyKeys) external view returns (uint[] memory); // Mutative functions function freezeRate(bytes32 currencyKey) external; } interface IVirtualPynth { // Views function balanceOfUnderlying(address account) external view returns (uint); function rate() external view returns (uint); function readyToSettle() external view returns (bool); function secsLeftInWaitingPeriod() external view returns (uint); function settled() external view returns (bool); function pynth() external view returns (IPynth); // Mutative functions function settle(address account) external; } // https://docs.peri.finance/contracts/source/interfaces/iexchanger interface IExchanger { // Views function calculateAmountAfterSettlement( address from, bytes32 currencyKey, uint amount, uint refunded ) external view returns (uint amountAfterSettlement); function isPynthRateInvalid(bytes32 currencyKey) external view returns (bool); function maxSecsLeftInWaitingPeriod(address account, bytes32 currencyKey) external view returns (uint); function settlementOwing(address account, bytes32 currencyKey) external view returns ( uint reclaimAmount, uint rebateAmount, uint numEntries ); function hasWaitingPeriodOrSettlementOwing(address account, bytes32 currencyKey) external view returns (bool); function feeRateForExchange(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view returns (uint exchangeFeeRate); function getAmountsForExchange( uint sourceAmount, bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey ) external view returns ( uint amountReceived, uint fee, uint exchangeFeeRate ); function priceDeviationThresholdFactor() external view returns (uint); function waitingPeriodSecs() external view returns (uint); // Mutative functions function exchange( address from, bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, address destinationAddress ) external returns (uint amountReceived); function exchangeOnBehalf( address exchangeForAddress, address from, bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey ) external returns (uint amountReceived); function exchangeWithTracking( address from, bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, address destinationAddress, address originator, bytes32 trackingCode ) external returns (uint amountReceived); function exchangeOnBehalfWithTracking( address exchangeForAddress, address from, bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, address originator, bytes32 trackingCode ) external returns (uint amountReceived); function exchangeWithVirtual( address from, bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, address destinationAddress, bytes32 trackingCode ) external returns (uint amountReceived, IVirtualPynth vPynth); function settle(address from, bytes32 currencyKey) external returns ( uint reclaimed, uint refunded, uint numEntries ); function setLastExchangeRateForPynth(bytes32 currencyKey, uint rate) external; function suspendPynthWithInvalidRate(bytes32 currencyKey) external; } // https://docs.peri.finance/contracts/source/interfaces/istakingrewards interface IShortingRewards { // Views function lastTimeRewardApplicable() external view returns (uint256); function rewardPerToken() external view returns (uint256); function earned(address account) external view returns (uint256); function getRewardForDuration() external view returns (uint256); function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); // Mutative function enrol(address account, uint256 amount) external; function withdraw(address account, uint256 amount) external; function getReward(address account) external; } // Inheritance // Libraries // Internal references contract Collateral is ICollateralLoan, Owned, MixinSystemSettings { /* ========== LIBRARIES ========== */ using SafeMath for uint; using SafeDecimalMath for uint; /* ========== CONSTANTS ========== */ bytes32 private constant pUSD = "pUSD"; // ========== STATE VARIABLES ========== // The pynth corresponding to the collateral. bytes32 public collateralKey; // Stores loans CollateralState public state; address public manager; // The pynths that this contract can issue. bytes32[] public pynths; // Map from currency key to pynth contract name. mapping(bytes32 => bytes32) public pynthsByKey; // Map from currency key to the shorting rewards contract mapping(bytes32 => address) public shortingRewards; // ========== SETTER STATE VARIABLES ========== // The minimum collateral ratio required to avoid liquidation. uint public minCratio; // The minimum amount of collateral to create a loan. uint public minCollateral; // The fee charged for issuing a loan. uint public issueFeeRate; // The maximum number of loans that an account can create with this collateral. uint public maxLoansPerAccount = 50; // Time in seconds that a user must wait between interacting with a loan. // Provides front running and flash loan protection. uint public interactionDelay = 300; bool public canOpenLoans = true; /* ========== ADDRESS RESOLVER CONFIGURATION ========== */ bytes32 private constant CONTRACT_SYSTEMSTATUS = "SystemStatus"; bytes32 private constant CONTRACT_EXRATES = "ExchangeRates"; bytes32 private constant CONTRACT_EXCHANGER = "Exchanger"; bytes32 private constant CONTRACT_FEEPOOL = "FeePool"; bytes32 private constant CONTRACT_PYNTHPUSD = "PynthpUSD"; /* ========== CONSTRUCTOR ========== */ constructor( CollateralState _state, address _owner, address _manager, address _resolver, bytes32 _collateralKey, uint _minCratio, uint _minCollateral ) public Owned(_owner) MixinSystemSettings(_resolver) { manager = _manager; state = _state; collateralKey = _collateralKey; minCratio = _minCratio; minCollateral = _minCollateral; } /* ========== VIEWS ========== */ function resolverAddressesRequired() public view returns (bytes32[] memory addresses) { bytes32[] memory existingAddresses = MixinSystemSettings.resolverAddressesRequired(); bytes32[] memory newAddresses = new bytes32[](5); newAddresses[0] = CONTRACT_FEEPOOL; newAddresses[1] = CONTRACT_EXRATES; newAddresses[2] = CONTRACT_EXCHANGER; newAddresses[3] = CONTRACT_SYSTEMSTATUS; newAddresses[4] = CONTRACT_PYNTHPUSD; bytes32[] memory combined = combineArrays(existingAddresses, newAddresses); addresses = combineArrays(combined, pynths); } /* ---------- Related Contracts ---------- */ function _systemStatus() internal view returns (ISystemStatus) { return ISystemStatus(requireAndGetAddress(CONTRACT_SYSTEMSTATUS)); } function _pynth(bytes32 pynthName) internal view returns (IPynth) { return IPynth(requireAndGetAddress(pynthName)); } function _pynthpUSD() internal view returns (IPynth) { return IPynth(requireAndGetAddress(CONTRACT_PYNTHPUSD)); } function _exchangeRates() internal view returns (IExchangeRates) { return IExchangeRates(requireAndGetAddress(CONTRACT_EXRATES)); } function _exchanger() internal view returns (IExchanger) { return IExchanger(requireAndGetAddress(CONTRACT_EXCHANGER)); } function _feePool() internal view returns (IFeePool) { return IFeePool(requireAndGetAddress(CONTRACT_FEEPOOL)); } function _manager() internal view returns (ICollateralManager) { return ICollateralManager(manager); } /* ---------- Public Views ---------- */ function collateralRatio(Loan memory loan) public view returns (uint cratio) { uint cvalue = _exchangeRates().effectiveValue(collateralKey, loan.collateral, pUSD); uint dvalue = _exchangeRates().effectiveValue(loan.currency, loan.amount.add(loan.accruedInterest), pUSD); cratio = cvalue.divideDecimal(dvalue); } // The maximum number of pynths issuable for this amount of collateral function maxLoan(uint amount, bytes32 currency) public view returns (uint max) { max = issuanceRatio().multiplyDecimal(_exchangeRates().effectiveValue(collateralKey, amount, currency)); } /** * r = target issuance ratio * D = debt value in pUSD * V = collateral value in pUSD * P = liquidation penalty * Calculates amount of pynths = (D - V * r) / (1 - (1 + P) * r) * Note: if you pass a loan in here that is not eligible for liquidation it will revert. * We check the ratio first in liquidateInternal and only pass eligible loans in. */ function liquidationAmount(Loan memory loan) public view returns (uint amount) { uint liquidationPenalty = getLiquidationPenalty(); uint debtValue = _exchangeRates().effectiveValue(loan.currency, loan.amount.add(loan.accruedInterest), pUSD); uint collateralValue = _exchangeRates().effectiveValue(collateralKey, loan.collateral, pUSD); uint unit = SafeDecimalMath.unit(); uint dividend = debtValue.sub(collateralValue.divideDecimal(minCratio)); uint divisor = unit.sub(unit.add(liquidationPenalty).divideDecimal(minCratio)); uint pUSDamount = dividend.divideDecimal(divisor); return _exchangeRates().effectiveValue(pUSD, pUSDamount, loan.currency); } // amount is the amount of pynths we are liquidating function collateralRedeemed(bytes32 currency, uint amount) public view returns (uint collateral) { uint liquidationPenalty = getLiquidationPenalty(); collateral = _exchangeRates().effectiveValue(currency, amount, collateralKey); collateral = collateral.multiplyDecimal(SafeDecimalMath.unit().add(liquidationPenalty)); } function arePynthsAndCurrenciesSet(bytes32[] calldata _pynthNamesInResolver, bytes32[] calldata _pynthKeys) external view returns (bool) { if (pynths.length != _pynthNamesInResolver.length) { return false; } for (uint i = 0; i < _pynthNamesInResolver.length; i++) { bytes32 pynthName = _pynthNamesInResolver[i]; if (pynths[i] != pynthName) { return false; } if (pynthsByKey[_pynthKeys[i]] != pynths[i]) { return false; } } return true; } /* ---------- UTILITIES ---------- */ // Check the account has enough of the pynth to make the payment function _checkPynthBalance( address payer, bytes32 key, uint amount ) internal view { require(IERC20(address(_pynth(pynthsByKey[key]))).balanceOf(payer) >= amount, "Not enough pynth balance"); } // We set the interest index to 0 to indicate the loan has been closed. function _checkLoanAvailable(Loan memory _loan) internal view { require(_loan.interestIndex > 0, "Loan does not exist"); require(_loan.lastInteraction.add(interactionDelay) <= block.timestamp, "Loan recently interacted with"); } function issuanceRatio() internal view returns (uint ratio) { ratio = SafeDecimalMath.unit().divideDecimalRound(minCratio); } /* ========== MUTATIVE FUNCTIONS ========== */ /* ---------- Pynths ---------- */ function addPynths(bytes32[] calldata _pynthNamesInResolver, bytes32[] calldata _pynthKeys) external onlyOwner { require(_pynthNamesInResolver.length == _pynthKeys.length, "Input array length mismatch"); for (uint i = 0; i < _pynthNamesInResolver.length; i++) { bytes32 pynthName = _pynthNamesInResolver[i]; pynths.push(pynthName); pynthsByKey[_pynthKeys[i]] = pynthName; } // ensure cache has the latest rebuildCache(); } /* ---------- Rewards Contracts ---------- */ function addRewardsContracts(address rewardsContract, bytes32 pynth) external onlyOwner { shortingRewards[pynth] = rewardsContract; } /* ---------- SETTERS ---------- */ function setMinCratio(uint _minCratio) external onlyOwner { require(_minCratio > SafeDecimalMath.unit(), "Must be greater than 1"); minCratio = _minCratio; emit MinCratioRatioUpdated(minCratio); } function setIssueFeeRate(uint _issueFeeRate) external onlyOwner { issueFeeRate = _issueFeeRate; emit IssueFeeRateUpdated(issueFeeRate); } function setInteractionDelay(uint _interactionDelay) external onlyOwner { require(_interactionDelay <= SafeDecimalMath.unit() * 3600, "Max 1 hour"); interactionDelay = _interactionDelay; emit InteractionDelayUpdated(interactionDelay); } function setManager(address _newManager) external onlyOwner { manager = _newManager; emit ManagerUpdated(manager); } function setCanOpenLoans(bool _canOpenLoans) external onlyOwner { canOpenLoans = _canOpenLoans; emit CanOpenLoansUpdated(canOpenLoans); } /* ---------- LOAN INTERACTIONS ---------- */ function openInternal( uint collateral, uint amount, bytes32 currency, bool short ) internal rateIsValid returns (uint id) { // 0. Check the system is active. _systemStatus().requireIssuanceActive(); require(canOpenLoans, "Opening is disabled"); // 1. We can only issue certain pynths. require(pynthsByKey[currency] > 0, "Not allowed to issue this pynth"); // 2. Make sure the pynth rate is not invalid. require(!_exchangeRates().rateIsInvalid(currency), "Currency rate is invalid"); // 3. Collateral >= minimum collateral size. require(collateral >= minCollateral, "Not enough collateral to open"); // 4. Cap the number of loans so that the array doesn't get too big. require(state.getNumLoans(msg.sender) < maxLoansPerAccount, "Max loans exceeded"); // 5. Check we haven't hit the debt cap for non peri collateral. (bool canIssue, bool anyRateIsInvalid) = _manager().exceedsDebtLimit(amount, currency); require(canIssue && !anyRateIsInvalid, "Debt limit or invalid rate"); // 6. Require requested loan < max loan require(amount <= maxLoan(collateral, currency), "Exceeds max borrowing power"); // 7. This fee is denominated in the currency of the loan uint issueFee = amount.multiplyDecimalRound(issueFeeRate); // 8. Calculate the minting fee and subtract it from the loan amount uint loanAmountMinusFee = amount.sub(issueFee); // 9. Get a Loan ID id = _manager().getNewLoanId(); // 10. Create the loan struct. Loan memory loan = Loan({ id: id, account: msg.sender, collateral: collateral, currency: currency, amount: amount, short: short, accruedInterest: 0, interestIndex: 0, lastInteraction: block.timestamp }); // 11. Accrue interest on the loan. loan = accrueInterest(loan); // 12. Save the loan to storage state.createLoan(loan); // 13. Pay the minting fees to the fee pool _payFees(issueFee, currency); // 14. If its short, convert back to pUSD, otherwise issue the loan. if (short) { _pynthpUSD().issue(msg.sender, _exchangeRates().effectiveValue(currency, loanAmountMinusFee, pUSD)); _manager().incrementShorts(currency, amount); if (shortingRewards[currency] != address(0)) { IShortingRewards(shortingRewards[currency]).enrol(msg.sender, amount); } } else { _pynth(pynthsByKey[currency]).issue(msg.sender, loanAmountMinusFee); _manager().incrementLongs(currency, amount); } // 15. Emit event emit LoanCreated(msg.sender, id, amount, collateral, currency, issueFee); } function closeInternal(address borrower, uint id) internal rateIsValid returns (uint collateral) { // 0. Check the system is active. _systemStatus().requireIssuanceActive(); // 1. Get the loan. Loan memory loan = state.getLoan(borrower, id); // 2. Check loan is open and the last interaction time. _checkLoanAvailable(loan); // 3. Accrue interest on the loan. loan = accrueInterest(loan); // 4. Work out the total amount owing on the loan. uint total = loan.amount.add(loan.accruedInterest); // 5. Check they have enough balance to close the loan. _checkPynthBalance(loan.account, loan.currency, total); // 6. Burn the pynths require( !_exchanger().hasWaitingPeriodOrSettlementOwing(borrower, loan.currency), "Waiting secs or settlement owing" ); _pynth(pynthsByKey[loan.currency]).burn(borrower, total); // 7. Tell the manager. if (loan.short) { _manager().decrementShorts(loan.currency, loan.amount); if (shortingRewards[loan.currency] != address(0)) { IShortingRewards(shortingRewards[loan.currency]).withdraw(borrower, loan.amount); } } else { _manager().decrementLongs(loan.currency, loan.amount); } // 8. Assign the collateral to be returned. collateral = loan.collateral; // 9. Pay fees _payFees(loan.accruedInterest, loan.currency); // 10. Record loan as closed loan.amount = 0; loan.collateral = 0; loan.accruedInterest = 0; loan.interestIndex = 0; loan.lastInteraction = block.timestamp; state.updateLoan(loan); // 11. Emit the event emit LoanClosed(borrower, id); } function closeByLiquidationInternal( address borrower, address liquidator, Loan memory loan ) internal returns (uint collateral) { // 1. Work out the total amount owing on the loan. uint total = loan.amount.add(loan.accruedInterest); // 2. Store this for the event. uint amount = loan.amount; // 3. Return collateral to the child class so it knows how much to transfer. collateral = loan.collateral; // 4. Burn the pynths require(!_exchanger().hasWaitingPeriodOrSettlementOwing(liquidator, loan.currency), "Waiting or settlement owing"); _pynth(pynthsByKey[loan.currency]).burn(liquidator, total); // 5. Tell the manager. if (loan.short) { _manager().decrementShorts(loan.currency, loan.amount); if (shortingRewards[loan.currency] != address(0)) { IShortingRewards(shortingRewards[loan.currency]).withdraw(borrower, loan.amount); } } else { _manager().decrementLongs(loan.currency, loan.amount); } // 6. Pay fees _payFees(loan.accruedInterest, loan.currency); // 7. Record loan as closed loan.amount = 0; loan.collateral = 0; loan.accruedInterest = 0; loan.interestIndex = 0; loan.lastInteraction = block.timestamp; state.updateLoan(loan); // 8. Emit the event. emit LoanClosedByLiquidation(borrower, loan.id, liquidator, amount, collateral); } function depositInternal( address account, uint id, uint amount ) internal rateIsValid { // 0. Check the system is active. _systemStatus().requireIssuanceActive(); // 1. They sent some value > 0 require(amount > 0, "Deposit must be greater than 0"); // 2. Get the loan Loan memory loan = state.getLoan(account, id); // 3. Check loan is open and last interaction time. _checkLoanAvailable(loan); // 4. Accrue interest loan = accrueInterest(loan); // 5. Add the collateral loan.collateral = loan.collateral.add(amount); // 6. Update the last interaction time. loan.lastInteraction = block.timestamp; // 7. Store the loan state.updateLoan(loan); // 8. Emit the event emit CollateralDeposited(account, id, amount, loan.collateral); } function withdrawInternal(uint id, uint amount) internal rateIsValid returns (uint withdraw) { // 0. Check the system is active. _systemStatus().requireIssuanceActive(); // 1. Get the loan. Loan memory loan = state.getLoan(msg.sender, id); // 2. Check loan is open and last interaction time. _checkLoanAvailable(loan); // 3. Accrue interest. loan = accrueInterest(loan); // 4. Subtract the collateral. loan.collateral = loan.collateral.sub(amount); // 5. Update the last interaction time. loan.lastInteraction = block.timestamp; // 6. Check that the new amount does not put them under the minimum c ratio. require(collateralRatio(loan) > minCratio, "Cratio too low"); // 7. Store the loan. state.updateLoan(loan); // 8. Assign the return variable. withdraw = amount; // 9. Emit the event. emit CollateralWithdrawn(msg.sender, id, amount, loan.collateral); } function liquidateInternal( address borrower, uint id, uint payment ) internal rateIsValid returns (uint collateralLiquidated) { // 0. Check the system is active. _systemStatus().requireIssuanceActive(); // 1. Check the payment amount. require(payment > 0, "Payment must be greater than 0"); // 2. Get the loan. Loan memory loan = state.getLoan(borrower, id); // 3. Check loan is open and last interaction time. _checkLoanAvailable(loan); // 4. Accrue interest. loan = accrueInterest(loan); // 5. Check they have enough balance to make the payment. _checkPynthBalance(msg.sender, loan.currency, payment); // 6. Check they are eligible for liquidation. require(collateralRatio(loan) < minCratio, "Cratio above liquidation ratio"); // 7. Determine how much needs to be liquidated to fix their c ratio. uint liqAmount = liquidationAmount(loan); // 8. Only allow them to liquidate enough to fix the c ratio. uint amountToLiquidate = liqAmount < payment ? liqAmount : payment; // 9. Work out the total amount owing on the loan. uint amountOwing = loan.amount.add(loan.accruedInterest); // 10. If its greater than the amount owing, we need to close the loan. if (amountToLiquidate >= amountOwing) { return closeByLiquidationInternal(borrower, msg.sender, loan); } // 11. Process the payment to workout interest/principal split. loan = _processPayment(loan, amountToLiquidate); // 12. Work out how much collateral to redeem. collateralLiquidated = collateralRedeemed(loan.currency, amountToLiquidate); loan.collateral = loan.collateral.sub(collateralLiquidated); // 13. Update the last interaction time. loan.lastInteraction = block.timestamp; // 14. Burn the pynths from the liquidator. require(!_exchanger().hasWaitingPeriodOrSettlementOwing(msg.sender, loan.currency), "Waiting or settlement owing"); _pynth(pynthsByKey[loan.currency]).burn(msg.sender, amountToLiquidate); // 15. Store the loan. state.updateLoan(loan); // 16. Emit the event emit LoanPartiallyLiquidated(borrower, id, msg.sender, amountToLiquidate, collateralLiquidated); } function repayInternal( address borrower, address repayer, uint id, uint payment ) internal rateIsValid { // 0. Check the system is active. _systemStatus().requireIssuanceActive(); // 1. Check the payment amount. require(payment > 0, "Payment must be greater than 0"); // 2. Get loan Loan memory loan = state.getLoan(borrower, id); // 3. Check loan is open and last interaction time. _checkLoanAvailable(loan); // 4. Accrue interest. loan = accrueInterest(loan); // 5. Check the spender has enough pynths to make the repayment _checkPynthBalance(repayer, loan.currency, payment); // 6. Process the payment. loan = _processPayment(loan, payment); // 7. Update the last interaction time. loan.lastInteraction = block.timestamp; // 8. Burn pynths from the payer require(!_exchanger().hasWaitingPeriodOrSettlementOwing(repayer, loan.currency), "Waiting or settlement owing"); _pynth(pynthsByKey[loan.currency]).burn(repayer, payment); // 9. Store the loan state.updateLoan(loan); // 10. Emit the event. emit LoanRepaymentMade(borrower, repayer, id, payment, loan.amount); } function drawInternal(uint id, uint amount) internal rateIsValid { // 0. Check the system is active. _systemStatus().requireIssuanceActive(); // 1. Get loan. Loan memory loan = state.getLoan(msg.sender, id); // 2. Check loan is open and last interaction time. _checkLoanAvailable(loan); // 3. Accrue interest. loan = accrueInterest(loan); // 4. Add the requested amount. loan.amount = loan.amount.add(amount); // 5. If it is below the minimum, don't allow this draw. require(collateralRatio(loan) > minCratio, "Cannot draw this much"); // 6. This fee is denominated in the currency of the loan uint issueFee = amount.multiplyDecimalRound(issueFeeRate); // 7. Calculate the minting fee and subtract it from the draw amount uint amountMinusFee = amount.sub(issueFee); // 8. If its short, let the child handle it, otherwise issue the pynths. if (loan.short) { _manager().incrementShorts(loan.currency, amount); _pynthpUSD().issue(msg.sender, _exchangeRates().effectiveValue(loan.currency, amountMinusFee, pUSD)); if (shortingRewards[loan.currency] != address(0)) { IShortingRewards(shortingRewards[loan.currency]).enrol(msg.sender, amount); } } else { _manager().incrementLongs(loan.currency, amount); _pynth(pynthsByKey[loan.currency]).issue(msg.sender, amountMinusFee); } // 9. Pay the minting fees to the fee pool _payFees(issueFee, loan.currency); // 10. Update the last interaction time. loan.lastInteraction = block.timestamp; // 11. Store the loan state.updateLoan(loan); // 12. Emit the event. emit LoanDrawnDown(msg.sender, id, amount); } // Update the cumulative interest rate for the currency that was interacted with. function accrueInterest(Loan memory loan) internal returns (Loan memory loanAfter) { loanAfter = loan; // 1. Get the rates we need. (uint entryRate, uint lastRate, uint lastUpdated, uint newIndex) = loan.short ? _manager().getShortRatesAndTime(loan.currency, loan.interestIndex) : _manager().getRatesAndTime(loan.interestIndex); // 2. Get the instantaneous rate. (uint rate, bool invalid) = loan.short ? _manager().getShortRate(pynthsByKey[loan.currency]) : _manager().getBorrowRate(); require(!invalid, "Rates are invalid"); // 3. Get the time since we last updated the rate. uint timeDelta = block.timestamp.sub(lastUpdated).mul(SafeDecimalMath.unit()); // 4. Get the latest cumulative rate. F_n+1 = F_n + F_last uint latestCumulative = lastRate.add(rate.multiplyDecimal(timeDelta)); // 5. If the loan was just opened, don't record any interest. Otherwise multiple by the amount outstanding. uint interest = loan.interestIndex == 0 ? 0 : loan.amount.multiplyDecimal(latestCumulative.sub(entryRate)); // 7. Update rates with the lastest cumulative rate. This also updates the time. loan.short ? _manager().updateShortRates(loan.currency, latestCumulative) : _manager().updateBorrowRates(latestCumulative); // 8. Update loan loanAfter.accruedInterest = loan.accruedInterest.add(interest); loanAfter.interestIndex = newIndex; state.updateLoan(loanAfter); } // Works out the amount of interest and principal after a repayment is made. function _processPayment(Loan memory loanBefore, uint payment) internal returns (Loan memory loanAfter) { loanAfter = loanBefore; if (payment > 0 && loanBefore.accruedInterest > 0) { uint interestPaid = payment > loanBefore.accruedInterest ? loanBefore.accruedInterest : payment; loanAfter.accruedInterest = loanBefore.accruedInterest.sub(interestPaid); payment = payment.sub(interestPaid); _payFees(interestPaid, loanBefore.currency); } // If there is more payment left after the interest, pay down the principal. if (payment > 0) { loanAfter.amount = loanBefore.amount.sub(payment); // And get the manager to reduce the total long/short balance. if (loanAfter.short) { _manager().decrementShorts(loanAfter.currency, payment); if (shortingRewards[loanAfter.currency] != address(0)) { IShortingRewards(shortingRewards[loanAfter.currency]).withdraw(loanAfter.account, payment); } } else { _manager().decrementLongs(loanAfter.currency, payment); } } } // Take an amount of fees in a certain pynth and convert it to pUSD before paying the fee pool. function _payFees(uint amount, bytes32 pynth) internal { if (amount > 0) { if (pynth != pUSD) { amount = _exchangeRates().effectiveValue(pynth, amount, pUSD); } _pynthpUSD().issue(_feePool().FEE_ADDRESS(), amount); _feePool().recordFeePaid(amount); } } // ========== MODIFIERS ========== modifier rateIsValid() { _requireRateIsValid(); _; } function _requireRateIsValid() private view { require(!_exchangeRates().rateIsInvalid(collateralKey), "Collateral rate is invalid"); } // ========== EVENTS ========== // Setters event MinCratioRatioUpdated(uint minCratio); event MinCollateralUpdated(uint minCollateral); event IssueFeeRateUpdated(uint issueFeeRate); event MaxLoansPerAccountUpdated(uint maxLoansPerAccount); event InteractionDelayUpdated(uint interactionDelay); event ManagerUpdated(address manager); event CanOpenLoansUpdated(bool canOpenLoans); // Loans event LoanCreated(address indexed account, uint id, uint amount, uint collateral, bytes32 currency, uint issuanceFee); event LoanClosed(address indexed account, uint id); event CollateralDeposited(address indexed account, uint id, uint amountDeposited, uint collateralAfter); event CollateralWithdrawn(address indexed account, uint id, uint amountWithdrawn, uint collateralAfter); event LoanRepaymentMade(address indexed account, address indexed repayer, uint id, uint amountRepaid, uint amountAfter); event LoanDrawnDown(address indexed account, uint id, uint amount); event LoanPartiallyLiquidated( address indexed account, uint id, address liquidator, uint amountLiquidated, uint collateralLiquidated ); event LoanClosedByLiquidation( address indexed account, uint id, address indexed liquidator, uint amountLiquidated, uint collateralLiquidated ); } // Inheritance // Internal references contract CollateralShort is Collateral { constructor( CollateralState _state, address _owner, address _manager, address _resolver, bytes32 _collateralKey, uint _minCratio, uint _minCollateral ) public Collateral(_state, _owner, _manager, _resolver, _collateralKey, _minCratio, _minCollateral) {} function open( uint collateral, uint amount, bytes32 currency ) external { require( collateral <= IERC20(address(_pynthpUSD())).allowance(msg.sender, address(this)), "Allowance not high enough" ); openInternal(collateral, amount, currency, true); IERC20(address(_pynthpUSD())).transferFrom(msg.sender, address(this), collateral); } function close(uint id) external { uint collateral = closeInternal(msg.sender, id); IERC20(address(_pynthpUSD())).transfer(msg.sender, collateral); } function deposit( address borrower, uint id, uint amount ) external { require(amount <= IERC20(address(_pynthpUSD())).allowance(msg.sender, address(this)), "Allowance not high enough"); IERC20(address(_pynthpUSD())).transferFrom(msg.sender, address(this), amount); depositInternal(borrower, id, amount); } function withdraw(uint id, uint amount) external { uint withdrawnAmount = withdrawInternal(id, amount); IERC20(address(_pynthpUSD())).transfer(msg.sender, withdrawnAmount); } function repay( address borrower, uint id, uint amount ) external { repayInternal(borrower, msg.sender, id, amount); } function draw(uint id, uint amount) external { drawInternal(id, amount); } function liquidate( address borrower, uint id, uint amount ) external { uint collateralLiquidated = liquidateInternal(borrower, id, amount); IERC20(address(_pynthpUSD())).transfer(msg.sender, collateralLiquidated); } function getReward(bytes32 currency, address account) external { if (shortingRewards[currency] != address(0)) { IShortingRewards(shortingRewards[currency]).getReward(account); } } }
Contract Security Audit
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CollateralState","name":"_state","type":"address"},{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_manager","type":"address"},{"internalType":"address","name":"_resolver","type":"address"},{"internalType":"bytes32","name":"_collateralKey","type":"bytes32"},{"internalType":"uint256","name":"_minCratio","type":"uint256"},{"internalType":"uint256","name":"_minCollateral","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"name","type":"bytes32"},{"indexed":false,"internalType":"address","name":"destination","type":"address"}],"name":"CacheUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"canOpenLoans","type":"bool"}],"name":"CanOpenLoansUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountDeposited","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"collateralAfter","type":"uint256"}],"name":"CollateralDeposited","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountWithdrawn","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"collateralAfter","type":"uint256"}],"name":"CollateralWithdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"interactionDelay","type":"uint256"}],"name":"InteractionDelayUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"issueFeeRate","type":"uint256"}],"name":"IssueFeeRateUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"}],"name":"LoanClosed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"address","name":"liquidator","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountLiquidated","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"collateralLiquidated","type":"uint256"}],"name":"LoanClosedByLiquidation","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"collateral","type":"uint256"},{"indexed":false,"internalType":"bytes32","name":"currency","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"issuanceFee","type":"uint256"}],"name":"LoanCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"LoanDrawnDown","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"address","name":"liquidator","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountLiquidated","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"collateralLiquidated","type":"uint256"}],"name":"LoanPartiallyLiquidated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"repayer","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountRepaid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountAfter","type":"uint256"}],"name":"LoanRepaymentMade","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"manager","type":"address"}],"name":"ManagerUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"maxLoansPerAccount","type":"uint256"}],"name":"MaxLoansPerAccountUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"minCollateral","type":"uint256"}],"name":"MinCollateralUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","nam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AddressResolver","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"resolverAddressesRequired","outputs":[{"internalType":"bytes32[]","name":"addresses","type":"bytes32[]"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bool","name":"_canOpenLoans","type":"bool"}],"name":"setCanOpenLoans","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"_interactionDelay","type":"uint256"}],"name":"setInteractionDelay","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"_issueFeeRate","type":"uint256"}],"name":"setIssueFeeRate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_newManager","type":"address"}],"name":"setManager","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"_minCratio","type":"uint256"}],"name":"setMinCratio","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"shortingRewards","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"state","outputs":[{"internalType":"contract CollateralState","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000062d0a4428f97fd398840dcd1c321f757430983ee000000000000000000000000918153d6e806df9d4d33664d1cc580416171f7200000000000000000000000005d20d931cc3b02195d2484b7fd80bbb4d14d2a9f0000000000000000000000007015cd1e78ba1428d103b0c2513077b2826b64fc705553440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010a741a46278000000000000000000000000000000000000000000000000003635c9adc5dea00000
-----Decoded View---------------
Arg [0] : _state (address): 0x62D0A4428f97fD398840DCd1C321f757430983EE
Arg [1] : _owner (address): 0x918153D6e806dF9d4D33664D1cC580416171f720
Arg [2] : _manager (address): 0x5D20d931CC3B02195D2484B7Fd80bBB4D14D2A9F
Arg [3] : _resolver (address): 0x7015cd1E78bA1428d103B0C2513077b2826b64fc
Arg [4] : _collateralKey (bytes32): 0x7055534400000000000000000000000000000000000000000000000000000000
Arg [5] : _minCratio (uint256): 1200000000000000000
Arg [6] : _minCollateral (uint256): 1000000000000000000000
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 00000000000000000000000062d0a4428f97fd398840dcd1c321f757430983ee
Arg [1] : 000000000000000000000000918153d6e806df9d4d33664d1cc580416171f720
Arg [2] : 0000000000000000000000005d20d931cc3b02195d2484b7fd80bbb4d14d2a9f
Arg [3] : 0000000000000000000000007015cd1e78ba1428d103b0c2513077b2826b64fc
Arg [4] : 7055534400000000000000000000000000000000000000000000000000000000
Arg [5] : 00000000000000000000000000000000000000000000000010a741a462780000
Arg [6] : 00000000000000000000000000000000000000000000003635c9adc5dea00000
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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.