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Contract Name:
Issuer
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 goerli-optimism.etherscan.io on 2022-08-30 */ /* ____ __ __ __ _ / __/__ __ ___ / /_ / / ___ / /_ (_)__ __ _\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ / /___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\ /___/ * Synthetix: Issuer.sol * * Latest source (may be newer): https://github.com/Synthetixio/synthetix/blob/master/contracts/Issuer.sol * Docs: https://docs.synthetix.io/contracts/Issuer * * Contract Dependencies: * - IAddressResolver * - IIssuer * - MixinResolver * - MixinSystemSettings * - Owned * Libraries: * - SafeCast * - SafeDecimalMath * - SafeMath * * MIT License * =========== * * Copyright (c) 2022 Synthetix * * 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.synthetix.io/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.synthetix.io/contracts/source/interfaces/iaddressresolver interface IAddressResolver { function getAddress(bytes32 name) external view returns (address); function getSynth(bytes32 key) external view returns (address); function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address); } // https://docs.synthetix.io/contracts/source/interfaces/isynth interface ISynth { // Views function currencyKey() external view returns (bytes32); function transferableSynths(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 Synthetix function burn(address account, uint amount) external; function issue(address account, uint amount) external; } // https://docs.synthetix.io/contracts/source/interfaces/iissuer interface IIssuer { // Views function allNetworksDebtInfo() external view returns ( uint256 debt, uint256 sharesSupply, bool isStale ); function anySynthOrSNXRateIsInvalid() external view returns (bool anyRateInvalid); function availableCurrencyKeys() external view returns (bytes32[] memory); function availableSynthCount() external view returns (uint); function availableSynths(uint index) external view returns (ISynth); function canBurnSynths(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 lastIssueEvent(address account) external view returns (uint); function maxIssuableSynths(address issuer) external view returns (uint maxIssuable); function minimumStakeTime() external view returns (uint); function remainingIssuableSynths(address issuer) external view returns ( uint maxIssuable, uint alreadyIssued, uint totalSystemDebt ); function synths(bytes32 currencyKey) external view returns (ISynth); function getSynths(bytes32[] calldata currencyKeys) external view returns (ISynth[] memory); function synthsByAddress(address synthAddress) external view returns (bytes32); function totalIssuedSynths(bytes32 currencyKey, bool excludeOtherCollateral) external view returns (uint); function transferableSynthetixAndAnyRateIsInvalid(address account, uint balance) external view returns (uint transferable, bool anyRateIsInvalid); function liquidationAmounts(address account, bool isSelfLiquidation) external view returns ( uint totalRedeemed, uint debtToRemove, uint escrowToLiquidate, uint initialDebtBalance ); // Restricted: used internally to Synthetix function addSynths(ISynth[] calldata synthsToAdd) external; function issueSynths(address from, uint amount) external; function issueSynthsOnBehalf( address issueFor, address from, uint amount ) external; function issueMaxSynths(address from) external; function issueMaxSynthsOnBehalf(address issueFor, address from) external; function burnSynths(address from, uint amount) external; function burnSynthsOnBehalf( address burnForAddress, address from, uint amount ) external; function burnSynthsToTarget(address from) external; function burnSynthsToTargetOnBehalf(address burnForAddress, address from) external; function burnForRedemption( address deprecatedSynthProxy, address account, uint balance ) external; function setCurrentPeriodId(uint128 periodId) external; function liquidateAccount(address account, bool isSelfLiquidation) external returns ( uint totalRedeemed, uint debtRemoved, uint escrowToLiquidate ); function issueSynthsWithoutDebt( bytes32 currencyKey, address to, uint amount ) external returns (bool rateInvalid); function burnSynthsWithoutDebt( bytes32 currencyKey, address to, uint amount ) external returns (bool rateInvalid); } // Inheritance // Internal references // https://docs.synthetix.io/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 getSynth(bytes32 key) external view returns (address) { IIssuer issuer = IIssuer(repository["Issuer"]); require(address(issuer) != address(0), "Cannot find Issuer address"); return address(issuer.synths(key)); } /* ========== EVENTS ========== */ event AddressImported(bytes32 name, address destination); } // Internal references // https://docs.synthetix.io/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.synthetix.io/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.synthetix.io/contracts/source/contracts/mixinsystemsettings contract MixinSystemSettings is MixinResolver { // must match the one defined SystemSettingsLib, defined in both places due to sol v0.5 limitations 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_ESCROW_DURATION = "liquidationEscrowDuration"; bytes32 internal constant SETTING_LIQUIDATION_PENALTY = "liquidationPenalty"; bytes32 internal constant SETTING_SNX_LIQUIDATION_PENALTY = "snxLiquidationPenalty"; bytes32 internal constant SETTING_SELF_LIQUIDATION_PENALTY = "selfLiquidationPenalty"; bytes32 internal constant SETTING_FLAG_REWARD = "flagReward"; bytes32 internal constant SETTING_LIQUIDATE_REWARD = "liquidateReward"; bytes32 internal constant SETTING_RATE_STALE_PERIOD = "rateStalePeriod"; /* ========== Exchange Fees Related ========== */ bytes32 internal constant SETTING_EXCHANGE_FEE_RATE = "exchangeFeeRate"; bytes32 internal constant SETTING_EXCHANGE_DYNAMIC_FEE_THRESHOLD = "exchangeDynamicFeeThreshold"; bytes32 internal constant SETTING_EXCHANGE_DYNAMIC_FEE_WEIGHT_DECAY = "exchangeDynamicFeeWeightDecay"; bytes32 internal constant SETTING_EXCHANGE_DYNAMIC_FEE_ROUNDS = "exchangeDynamicFeeRounds"; bytes32 internal constant SETTING_EXCHANGE_MAX_DYNAMIC_FEE = "exchangeMaxDynamicFee"; /* ========== End Exchange Fees Related ========== */ 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_CROSS_DOMAIN_FEE_PERIOD_CLOSE_GAS_LIMIT = "crossDomainCloseGasLimit"; bytes32 internal constant SETTING_CROSS_DOMAIN_RELAY_GAS_LIMIT = "crossDomainRelayGasLimit"; bytes32 internal constant SETTING_ETHER_WRAPPER_MAX_ETH = "etherWrapperMaxETH"; bytes32 internal constant SETTING_ETHER_WRAPPER_MINT_FEE_RATE = "etherWrapperMintFeeRate"; bytes32 internal constant SETTING_ETHER_WRAPPER_BURN_FEE_RATE = "etherWrapperBurnFeeRate"; bytes32 internal constant SETTING_WRAPPER_MAX_TOKEN_AMOUNT = "wrapperMaxTokens"; bytes32 internal constant SETTING_WRAPPER_MINT_FEE_RATE = "wrapperMintFeeRate"; bytes32 internal constant SETTING_WRAPPER_BURN_FEE_RATE = "wrapperBurnFeeRate"; bytes32 internal constant SETTING_INTERACTION_DELAY = "interactionDelay"; bytes32 internal constant SETTING_COLLAPSE_FEE_RATE = "collapseFeeRate"; bytes32 internal constant SETTING_ATOMIC_MAX_VOLUME_PER_BLOCK = "atomicMaxVolumePerBlock"; bytes32 internal constant SETTING_ATOMIC_TWAP_WINDOW = "atomicTwapWindow"; bytes32 internal constant SETTING_ATOMIC_EQUIVALENT_FOR_DEX_PRICING = "atomicEquivalentForDexPricing"; bytes32 internal constant SETTING_ATOMIC_EXCHANGE_FEE_RATE = "atomicExchangeFeeRate"; bytes32 internal constant SETTING_ATOMIC_VOLATILITY_CONSIDERATION_WINDOW = "atomicVolConsiderationWindow"; bytes32 internal constant SETTING_ATOMIC_VOLATILITY_UPDATE_THRESHOLD = "atomicVolUpdateThreshold"; bytes32 internal constant SETTING_PURE_CHAINLINK_PRICE_FOR_ATOMIC_SWAPS_ENABLED = "pureChainlinkForAtomicsEnabled"; bytes32 internal constant SETTING_CROSS_SYNTH_TRANSFER_ENABLED = "crossChainSynthTransferEnabled"; bytes32 internal constant CONTRACT_FLEXIBLESTORAGE = "FlexibleStorage"; enum CrossDomainMessageGasLimits {Deposit, Escrow, Reward, Withdrawal, CloseFeePeriod, Relay} struct DynamicFeeConfig { uint threshold; uint weightDecay; uint rounds; uint maxFee; } 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 if (gasLimitType == CrossDomainMessageGasLimits.Relay) { return SETTING_CROSS_DOMAIN_RELAY_GAS_LIMIT; } else if (gasLimitType == CrossDomainMessageGasLimits.CloseFeePeriod) { return SETTING_CROSS_DOMAIN_FEE_PERIOD_CLOSE_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 getLiquidationEscrowDuration() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_ESCROW_DURATION); } function getLiquidationPenalty() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_PENALTY); } function getSnxLiquidationPenalty() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_SNX_LIQUIDATION_PENALTY); } function getSelfLiquidationPenalty() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_SELF_LIQUIDATION_PENALTY); } function getFlagReward() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_FLAG_REWARD); } function getLiquidateReward() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATE_REWARD); } function getRateStalePeriod() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_RATE_STALE_PERIOD); } /* ========== Exchange Related Fees ========== */ function getExchangeFeeRate(bytes32 currencyKey) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_EXCHANGE_FEE_RATE, currencyKey)) ); } /// @notice Get exchange dynamic fee related keys /// @return threshold, weight decay, rounds, and max fee function getExchangeDynamicFeeConfig() internal view returns (DynamicFeeConfig memory) { bytes32[] memory keys = new bytes32[](4); keys[0] = SETTING_EXCHANGE_DYNAMIC_FEE_THRESHOLD; keys[1] = SETTING_EXCHANGE_DYNAMIC_FEE_WEIGHT_DECAY; keys[2] = SETTING_EXCHANGE_DYNAMIC_FEE_ROUNDS; keys[3] = SETTING_EXCHANGE_MAX_DYNAMIC_FEE; uint[] memory values = flexibleStorage().getUIntValues(SETTING_CONTRACT_NAME, keys); return DynamicFeeConfig({threshold: values[0], weightDecay: values[1], rounds: values[2], maxFee: values[3]}); } /* ========== End Exchange Related Fees ========== */ 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 getEtherWrapperMaxETH() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_MAX_ETH); } function getEtherWrapperMintFeeRate() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_MINT_FEE_RATE); } function getEtherWrapperBurnFeeRate() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_BURN_FEE_RATE); } function getWrapperMaxTokenAmount(address wrapper) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_WRAPPER_MAX_TOKEN_AMOUNT, wrapper)) ); } function getWrapperMintFeeRate(address wrapper) internal view returns (int) { return flexibleStorage().getIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_WRAPPER_MINT_FEE_RATE, wrapper)) ); } function getWrapperBurnFeeRate(address wrapper) internal view returns (int) { return flexibleStorage().getIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_WRAPPER_BURN_FEE_RATE, wrapper)) ); } function getInteractionDelay(address collateral) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_INTERACTION_DELAY, collateral)) ); } function getCollapseFeeRate(address collateral) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_COLLAPSE_FEE_RATE, collateral)) ); } function getAtomicMaxVolumePerBlock() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ATOMIC_MAX_VOLUME_PER_BLOCK); } function getAtomicTwapWindow() internal view returns (uint) { return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ATOMIC_TWAP_WINDOW); } function getAtomicEquivalentForDexPricing(bytes32 currencyKey) internal view returns (address) { return flexibleStorage().getAddressValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_ATOMIC_EQUIVALENT_FOR_DEX_PRICING, currencyKey)) ); } function getAtomicExchangeFeeRate(bytes32 currencyKey) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_ATOMIC_EXCHANGE_FEE_RATE, currencyKey)) ); } function getAtomicVolatilityConsiderationWindow(bytes32 currencyKey) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_ATOMIC_VOLATILITY_CONSIDERATION_WINDOW, currencyKey)) ); } function getAtomicVolatilityUpdateThreshold(bytes32 currencyKey) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_ATOMIC_VOLATILITY_UPDATE_THRESHOLD, currencyKey)) ); } function getPureChainlinkPriceForAtomicSwapsEnabled(bytes32 currencyKey) internal view returns (bool) { return flexibleStorage().getBoolValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_PURE_CHAINLINK_PRICE_FOR_ATOMIC_SWAPS_ENABLED, currencyKey)) ); } function getCrossChainSynthTransferEnabled(bytes32 currencyKey) internal view returns (uint) { return flexibleStorage().getUIntValue( SETTING_CONTRACT_NAME, keccak256(abi.encodePacked(SETTING_CROSS_SYNTH_TRANSFER_ENABLED, currencyKey)) ); } } // SPDX-License-Identifier: MIT /** * @dev Wrappers over Solidity's uintXX casting operators with added overflow * checks. * * Downcasting from uint256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such 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. * * Can be combined with {SafeMath} to extend it to smaller types, by performing * all math on `uint256` and then downcasting. */ library SafeCast { /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { require(value < 2**128, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { require(value < 2**64, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { require(value < 2**32, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { require(value < 2**16, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits. */ function toUint8(uint256 value) internal pure returns (uint8) { require(value < 2**8, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { require(value < 2**255, "SafeCast: value doesn't fit in an int256"); return int256(value); } } /** * @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.synthetix.io/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; } // Computes `a - b`, setting the value to 0 if b > a. function floorsub(uint a, uint b) internal pure returns (uint) { return b >= a ? 0 : a - b; } /* ---------- Utilities ---------- */ /* * Absolute value of the input, returned as a signed number. */ function signedAbs(int x) internal pure returns (int) { return x < 0 ? -x : x; } /* * Absolute value of the input, returned as an unsigned number. */ function abs(int x) internal pure returns (uint) { return uint(signedAbs(x)); } } // https://docs.synthetix.io/contracts/source/interfaces/isynthetixdebtshare interface ISynthetixDebtShare { // Views function currentPeriodId() external view returns (uint128); function allowance(address account, address spender) external view returns (uint); function balanceOf(address account) external view returns (uint); function balanceOfOnPeriod(address account, uint periodId) external view returns (uint); function totalSupply() external view returns (uint); function sharePercent(address account) external view returns (uint); function sharePercentOnPeriod(address account, uint periodId) external view returns (uint); // Mutative functions function takeSnapshot(uint128 id) external; function mintShare(address account, uint256 amount) external; function burnShare(address account, uint256 amount) external; function approve(address, uint256) external pure returns (bool); function transfer(address to, uint256 amount) external pure returns (bool); function transferFrom( address from, address to, uint256 amount ) external returns (bool); function addAuthorizedBroker(address target) external; function removeAuthorizedBroker(address target) external; function addAuthorizedToSnapshot(address target) external; function removeAuthorizedToSnapshot(address target) external; } interface IVirtualSynth { // 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 synth() external view returns (ISynth); // Mutative functions function settle(address account) external; } // https://docs.synthetix.io/contracts/source/interfaces/iexchanger interface IExchanger { struct ExchangeEntrySettlement { bytes32 src; uint amount; bytes32 dest; uint reclaim; uint rebate; uint srcRoundIdAtPeriodEnd; uint destRoundIdAtPeriodEnd; uint timestamp; } struct ExchangeEntry { uint sourceRate; uint destinationRate; uint destinationAmount; uint exchangeFeeRate; uint exchangeDynamicFeeRate; uint roundIdForSrc; uint roundIdForDest; } // Views function calculateAmountAfterSettlement( address from, bytes32 currencyKey, uint amount, uint refunded ) external view returns (uint amountAfterSettlement); function isSynthRateInvalid(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); function dynamicFeeRateForExchange(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view returns (uint feeRate, bool tooVolatile); 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); function lastExchangeRate(bytes32 currencyKey) external view returns (uint); // Mutative functions function exchange( address exchangeForAddress, address from, bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, address destinationAddress, bool virtualSynth, address rewardAddress, bytes32 trackingCode ) external returns (uint amountReceived, IVirtualSynth vSynth); function exchangeAtomically( address from, bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, address destinationAddress, bytes32 trackingCode, uint minAmount ) external returns (uint amountReceived); function settle(address from, bytes32 currencyKey) external returns ( uint reclaimed, uint refunded, uint numEntries ); function suspendSynthWithInvalidRate(bytes32 currencyKey) external; } // https://docs.synthetix.io/contracts/source/interfaces/idelegateapprovals interface IDelegateApprovals { // Views function canBurnFor(address authoriser, address delegate) external view returns (bool); function canIssueFor(address authoriser, address delegate) external view returns (bool); function canClaimFor(address authoriser, address delegate) external view returns (bool); function canExchangeFor(address authoriser, address delegate) external view returns (bool); // Mutative function approveAllDelegatePowers(address delegate) external; function removeAllDelegatePowers(address delegate) external; function approveBurnOnBehalf(address delegate) external; function removeBurnOnBehalf(address delegate) external; function approveIssueOnBehalf(address delegate) external; function removeIssueOnBehalf(address delegate) external; function approveClaimOnBehalf(address delegate) external; function removeClaimOnBehalf(address delegate) external; function approveExchangeOnBehalf(address delegate) external; function removeExchangeOnBehalf(address delegate) external; } // https://docs.synthetix.io/contracts/source/interfaces/iexchangerates interface IExchangeRates { // Structs struct RateAndUpdatedTime { uint216 rate; uint40 time; } // 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 anyRateIsInvalidAtRound(bytes32[] calldata currencyKeys, uint[] calldata roundIds) external view returns (bool); 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 effectiveValueAndRatesAtRound( bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey, uint roundIdForSrc, uint roundIdForDest ) external view returns ( uint value, uint sourceRate, uint destinationRate ); function effectiveAtomicValueAndRates( bytes32 sourceCurrencyKey, uint sourceAmount, bytes32 destinationCurrencyKey ) external view returns ( uint value, uint systemValue, uint systemSourceRate, uint systemDestinationRate ); function getCurrentRoundId(bytes32 currencyKey) external view returns (uint); function getLastRoundIdBeforeElapsedSecs( bytes32 currencyKey, uint startingRoundId, uint startingTimestamp, uint timediff ) external view returns (uint); function lastRateUpdateTimes(bytes32 currencyKey) external view returns (uint256); 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 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, uint roundId ) 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); function synthTooVolatileForAtomicExchange(bytes32 currencyKey) external view returns (bool); function rateWithSafetyChecks(bytes32 currencyKey) external returns ( uint rate, bool broken, bool invalid ); } // https://docs.synthetix.io/contracts/source/interfaces/ICircuitBreaker interface ICircuitBreaker { // Views function isInvalid(address oracleAddress, uint value) external view returns (bool); function priceDeviationThresholdFactor() external view returns (uint); function isDeviationAboveThreshold(uint base, uint comparison) external view returns (bool); function lastValue(address oracleAddress) external view returns (uint); function circuitBroken(address oracleAddress) external view returns (bool); // Mutative functions function resetLastValue(address[] calldata oracleAddresses, uint[] calldata values) external; function probeCircuitBreaker(address oracleAddress, uint value) external returns (bool circuitBroken); } // https://docs.synthetix.io/contracts/source/interfaces/ihasbalance interface IHasBalance { // Views function balanceOf(address account) external view returns (uint); } // https://docs.synthetix.io/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); } interface ILiquidator { // Views function issuanceRatio() external view returns (uint); function liquidationDelay() external view returns (uint); function liquidationRatio() external view returns (uint); function liquidationEscrowDuration() external view returns (uint); function liquidationPenalty() external view returns (uint); function selfLiquidationPenalty() external view returns (uint); function liquidateReward() external view returns (uint); function flagReward() external view returns (uint); function liquidationCollateralRatio() external view returns (uint); function getLiquidationDeadlineForAccount(address account) external view returns (uint); function getLiquidationCallerForAccount(address account) external view returns (address); function isLiquidationOpen(address account, bool isSelfLiquidation) external view returns (bool); function isLiquidationDeadlinePassed(address account) external view returns (bool); function calculateAmountToFixCollateral( uint debtBalance, uint collateral, uint penalty ) external view returns (uint); function liquidationAmounts(address account, bool isSelfLiquidation) external view returns ( uint totalRedeemed, uint debtToRemove, uint escrowToLiquidate, uint initialDebtBalance ); // Mutative Functions function flagAccountForLiquidation(address account) external; // Restricted: used internally to Synthetix contracts function removeAccountInLiquidation(address account) external; function checkAndRemoveAccountInLiquidation(address account) external; } interface ILiquidatorRewards { // Views function earned(address account) external view returns (uint256); // Mutative function getReward(address account) external; function notifyRewardAmount(uint256 reward) external; function updateEntry(address account) external; } interface ISynthRedeemer { // Rate of redemption - 0 for none function redemptions(address synthProxy) external view returns (uint redeemRate); // sUSD balance of deprecated token holder function balanceOf(IERC20 synthProxy, address account) external view returns (uint balanceOfInsUSD); // Full sUSD supply of token function totalSupply(IERC20 synthProxy) external view returns (uint totalSupplyInsUSD); function redeem(IERC20 synthProxy) external; function redeemAll(IERC20[] calldata synthProxies) external; function redeemPartial(IERC20 synthProxy, uint amountOfSynth) external; // Restricted to Issuer function deprecate(IERC20 synthProxy, uint rateToRedeem) external; } // https://docs.synthetix.io/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 systemSuspended() external view returns (bool); function requireIssuanceActive() external view; function requireExchangeActive() external view; function requireFuturesActive() external view; function requireFuturesMarketActive(bytes32 marketKey) external view; function requireExchangeBetweenSynthsAllowed(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view; function requireSynthActive(bytes32 currencyKey) external view; function synthSuspended(bytes32 currencyKey) external view returns (bool); function requireSynthsActive(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 futuresSuspension() external view returns (bool suspended, uint248 reason); function synthExchangeSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason); function synthSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason); function futuresMarketSuspension(bytes32 marketKey) external view returns (bool suspended, uint248 reason); function getSynthExchangeSuspensions(bytes32[] calldata synths) external view returns (bool[] memory exchangeSuspensions, uint256[] memory reasons); function getSynthSuspensions(bytes32[] calldata synths) external view returns (bool[] memory suspensions, uint256[] memory reasons); function getFuturesMarketSuspensions(bytes32[] calldata marketKeys) external view returns (bool[] memory suspensions, uint256[] memory reasons); // Restricted functions function suspendIssuance(uint256 reason) external; function suspendSynth(bytes32 currencyKey, uint256 reason) external; function suspendFuturesMarket(bytes32 marketKey, uint256 reason) external; function updateAccessControl( bytes32 section, address account, bool canSuspend, bool canResume ) external; } // Inheritance // Internal references // https://docs.synthetix.io/contracts/source/contracts/proxy contract Proxy is Owned { Proxyable public target; constructor(address _owner) public Owned(_owner) {} function setTarget(Proxyable _target) external onlyOwner { target = _target; emit TargetUpdated(_target); } function _emit( bytes calldata callData, uint numTopics, bytes32 topic1, bytes32 topic2, bytes32 topic3, bytes32 topic4 ) external onlyTarget { uint size = callData.length; bytes memory _callData = callData; assembly { /* The first 32 bytes of callData contain its length (as specified by the abi). * Length is assumed to be a uint256 and therefore maximum of 32 bytes * in length. It is also leftpadded to be a multiple of 32 bytes. * This means moving call_data across 32 bytes guarantees we correctly access * the data itself. */ switch numTopics case 0 { log0(add(_callData, 32), size) } case 1 { log1(add(_callData, 32), size, topic1) } case 2 { log2(add(_callData, 32), size, topic1, topic2) } case 3 { log3(add(_callData, 32), size, topic1, topic2, topic3) } case 4 { log4(add(_callData, 32), size, topic1, topic2, topic3, topic4) } } } // solhint-disable no-complex-fallback function() external payable { // Mutable call setting Proxyable.messageSender as this is using call not delegatecall target.setMessageSender(msg.sender); assembly { let free_ptr := mload(0x40) calldatacopy(free_ptr, 0, calldatasize) /* We must explicitly forward ether to the underlying contract as well. */ let result := call(gas, sload(target_slot), callvalue, free_ptr, calldatasize, 0, 0) returndatacopy(free_ptr, 0, returndatasize) if iszero(result) { revert(free_ptr, returndatasize) } return(free_ptr, returndatasize) } } modifier onlyTarget { require(Proxyable(msg.sender) == target, "Must be proxy target"); _; } event TargetUpdated(Proxyable newTarget); } // Inheritance // Internal references // https://docs.synthetix.io/contracts/source/contracts/proxyable contract Proxyable is Owned { // This contract should be treated like an abstract contract /* The proxy this contract exists behind. */ Proxy public proxy; /* The caller of the proxy, passed through to this contract. * Note that every function using this member must apply the onlyProxy or * optionalProxy modifiers, otherwise their invocations can use stale values. */ address public messageSender; constructor(address payable _proxy) internal { // This contract is abstract, and thus cannot be instantiated directly require(owner != address(0), "Owner must be set"); proxy = Proxy(_proxy); emit ProxyUpdated(_proxy); } function setProxy(address payable _proxy) external onlyOwner { proxy = Proxy(_proxy); emit ProxyUpdated(_proxy); } function setMessageSender(address sender) external onlyProxy { messageSender = sender; } modifier onlyProxy { _onlyProxy(); _; } function _onlyProxy() private view { require(Proxy(msg.sender) == proxy, "Only the proxy can call"); } modifier optionalProxy { _optionalProxy(); _; } function _optionalProxy() private { if (Proxy(msg.sender) != proxy && messageSender != msg.sender) { messageSender = msg.sender; } } modifier optionalProxy_onlyOwner { _optionalProxy_onlyOwner(); _; } // solhint-disable-next-line func-name-mixedcase function _optionalProxy_onlyOwner() private { if (Proxy(msg.sender) != proxy && messageSender != msg.sender) { messageSender = msg.sender; } require(messageSender == owner, "Owner only function"); } event ProxyUpdated(address proxyAddress); } interface AggregatorInterface { function latestAnswer() external view returns (int256); function latestTimestamp() external view returns (uint256); function latestRound() external view returns (uint256); function getAnswer(uint256 roundId) external view returns (int256); function getTimestamp(uint256 roundId) external view returns (uint256); event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 timestamp); event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt); } interface AggregatorV3Interface { function decimals() external view returns (uint8); function description() external view returns (string memory); function version() external view returns (uint256); // getRoundData and latestRoundData should both raise "No data present" // if they do not have data to report, instead of returning unset values // which could be misinterpreted as actual reported values. function getRoundData(uint80 _roundId) external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); function latestRoundData() external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); } /** * @title The V2 & V3 Aggregator Interface * @notice Solidity V0.5 does not allow interfaces to inherit from other * interfaces so this contract is a combination of v0.5 AggregatorInterface.sol * and v0.5 AggregatorV3Interface.sol. */ interface AggregatorV2V3Interface { // // V2 Interface: // function latestAnswer() external view returns (int256); function latestTimestamp() external view returns (uint256); function latestRound() external view returns (uint256); function getAnswer(uint256 roundId) external view returns (int256); function getTimestamp(uint256 roundId) external view returns (uint256); event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 timestamp); event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt); // // V3 Interface: // function decimals() external view returns (uint8); function description() external view returns (string memory); function version() external view returns (uint256); // getRoundData and latestRoundData should both raise "No data present" // if they do not have data to report, instead of returning unset values // which could be misinterpreted as actual reported values. function getRoundData(uint80 _roundId) external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); function latestRoundData() external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); } // Inheritance // Libraries // Internal references interface IProxy { function target() external view returns (address); } interface IIssuerInternalDebtCache { function updateCachedSynthDebtWithRate(bytes32 currencyKey, uint currencyRate) external; function updateCachedSynthDebtsWithRates(bytes32[] calldata currencyKeys, uint[] calldata currencyRates) external; function updateDebtCacheValidity(bool currentlyInvalid) external; function totalNonSnxBackedDebt() external view returns (uint excludedDebt, bool isInvalid); function cacheInfo() external view returns ( uint cachedDebt, uint timestamp, bool isInvalid, bool isStale ); function updateCachedsUSDDebt(int amount) external; } // https://docs.synthetix.io/contracts/source/contracts/issuer contract Issuer is Owned, MixinSystemSettings, IIssuer { using SafeMath for uint; using SafeDecimalMath for uint; bytes32 public constant CONTRACT_NAME = "Issuer"; // Available Synths which can be used with the system ISynth[] public availableSynths; mapping(bytes32 => ISynth) public synths; mapping(address => bytes32) public synthsByAddress; /* ========== ENCODED NAMES ========== */ bytes32 internal constant sUSD = "sUSD"; bytes32 internal constant SNX = "SNX"; // Flexible storage names bytes32 internal constant LAST_ISSUE_EVENT = "lastIssueEvent"; /* ========== ADDRESS RESOLVER CONFIGURATION ========== */ bytes32 private constant CONTRACT_SYNTHETIX = "Synthetix"; bytes32 private constant CONTRACT_EXCHANGER = "Exchanger"; bytes32 private constant CONTRACT_EXRATES = "ExchangeRates"; bytes32 private constant CONTRACT_CIRCUIT_BREAKER = "CircuitBreaker"; bytes32 private constant CONTRACT_SYNTHETIXDEBTSHARE = "SynthetixDebtShare"; bytes32 private constant CONTRACT_FEEPOOL = "FeePool"; bytes32 private constant CONTRACT_DELEGATEAPPROVALS = "DelegateApprovals"; bytes32 private constant CONTRACT_REWARDESCROW_V2 = "RewardEscrowV2"; bytes32 private constant CONTRACT_SYNTHETIXESCROW = "SynthetixEscrow"; bytes32 private constant CONTRACT_LIQUIDATOR = "Liquidator"; bytes32 private constant CONTRACT_LIQUIDATOR_REWARDS = "LiquidatorRewards"; bytes32 private constant CONTRACT_DEBTCACHE = "DebtCache"; bytes32 private constant CONTRACT_SYNTHREDEEMER = "SynthRedeemer"; bytes32 private constant CONTRACT_SYNTHETIXBRIDGETOOPTIMISM = "SynthetixBridgeToOptimism"; bytes32 private constant CONTRACT_SYNTHETIXBRIDGETOBASE = "SynthetixBridgeToBase"; bytes32 private constant CONTRACT_EXT_AGGREGATOR_ISSUED_SYNTHS = "ext:AggregatorIssuedSynths"; bytes32 private constant CONTRACT_EXT_AGGREGATOR_DEBT_RATIO = "ext:AggregatorDebtRatio"; constructor(address _owner, address _resolver) public Owned(_owner) MixinSystemSettings(_resolver) {} /* ========== VIEWS ========== */ function resolverAddressesRequired() public view returns (bytes32[] memory addresses) { bytes32[] memory existingAddresses = MixinSystemSettings.resolverAddressesRequired(); bytes32[] memory newAddresses = new bytes32[](15); newAddresses[0] = CONTRACT_SYNTHETIX; newAddresses[1] = CONTRACT_EXCHANGER; newAddresses[2] = CONTRACT_EXRATES; newAddresses[3] = CONTRACT_CIRCUIT_BREAKER; newAddresses[4] = CONTRACT_SYNTHETIXDEBTSHARE; newAddresses[5] = CONTRACT_FEEPOOL; newAddresses[6] = CONTRACT_DELEGATEAPPROVALS; newAddresses[7] = CONTRACT_REWARDESCROW_V2; newAddresses[8] = CONTRACT_SYNTHETIXESCROW; newAddresses[9] = CONTRACT_LIQUIDATOR; newAddresses[10] = CONTRACT_LIQUIDATOR_REWARDS; newAddresses[11] = CONTRACT_DEBTCACHE; newAddresses[12] = CONTRACT_SYNTHREDEEMER; newAddresses[13] = CONTRACT_EXT_AGGREGATOR_ISSUED_SYNTHS; newAddresses[14] = CONTRACT_EXT_AGGREGATOR_DEBT_RATIO; return combineArrays(existingAddresses, newAddresses); } function synthetixERC20() internal view returns (IERC20) { return IERC20(requireAndGetAddress(CONTRACT_SYNTHETIX)); } function exchanger() internal view returns (IExchanger) { return IExchanger(requireAndGetAddress(CONTRACT_EXCHANGER)); } function exchangeRates() internal view returns (IExchangeRates) { return IExchangeRates(requireAndGetAddress(CONTRACT_EXRATES)); } function circuitBreaker() internal view returns (ICircuitBreaker) { return ICircuitBreaker(requireAndGetAddress(CONTRACT_CIRCUIT_BREAKER)); } function synthetixDebtShare() internal view returns (ISynthetixDebtShare) { return ISynthetixDebtShare(requireAndGetAddress(CONTRACT_SYNTHETIXDEBTSHARE)); } function liquidator() internal view returns (ILiquidator) { return ILiquidator(requireAndGetAddress(CONTRACT_LIQUIDATOR)); } function liquidatorRewards() internal view returns (ILiquidatorRewards) { return ILiquidatorRewards(requireAndGetAddress(CONTRACT_LIQUIDATOR_REWARDS)); } function delegateApprovals() internal view returns (IDelegateApprovals) { return IDelegateApprovals(requireAndGetAddress(CONTRACT_DELEGATEAPPROVALS)); } function rewardEscrowV2() internal view returns (IHasBalance) { return IHasBalance(requireAndGetAddress(CONTRACT_REWARDESCROW_V2)); } function synthetixEscrow() internal view returns (IHasBalance) { return IHasBalance(requireAndGetAddress(CONTRACT_SYNTHETIXESCROW)); } function debtCache() internal view returns (IIssuerInternalDebtCache) { return IIssuerInternalDebtCache(requireAndGetAddress(CONTRACT_DEBTCACHE)); } function synthRedeemer() internal view returns (ISynthRedeemer) { return ISynthRedeemer(requireAndGetAddress(CONTRACT_SYNTHREDEEMER)); } function allNetworksDebtInfo() public view returns ( uint256 debt, uint256 sharesSupply, bool isStale ) { (, int256 rawIssuedSynths, , uint issuedSynthsUpdatedAt, ) = AggregatorV2V3Interface(requireAndGetAddress(CONTRACT_EXT_AGGREGATOR_ISSUED_SYNTHS)).latestRoundData(); (uint rawRatio, uint ratioUpdatedAt) = _rawDebtRatioAndUpdatedAt(); debt = uint(rawIssuedSynths); sharesSupply = rawRatio == 0 ? 0 : debt.divideDecimalRoundPrecise(uint(rawRatio)); uint stalePeriod = getRateStalePeriod(); isStale = stalePeriod < block.timestamp && (block.timestamp - stalePeriod > issuedSynthsUpdatedAt || block.timestamp - stalePeriod > ratioUpdatedAt); } function issuanceRatio() external view returns (uint) { return getIssuanceRatio(); } function _rawDebtRatioAndUpdatedAt() internal view returns (uint, uint) { (, int256 rawRatioInt, , uint ratioUpdatedAt, ) = AggregatorV2V3Interface(requireAndGetAddress(CONTRACT_EXT_AGGREGATOR_DEBT_RATIO)).latestRoundData(); return (uint(rawRatioInt), ratioUpdatedAt); } function _sharesForDebt(uint debtAmount) internal view returns (uint) { (uint rawRatio, ) = _rawDebtRatioAndUpdatedAt(); return rawRatio == 0 ? 0 : debtAmount.divideDecimalRoundPrecise(rawRatio); } function _debtForShares(uint sharesAmount) internal view returns (uint) { (uint rawRatio, ) = _rawDebtRatioAndUpdatedAt(); return sharesAmount.multiplyDecimalRoundPrecise(rawRatio); } function _availableCurrencyKeysWithOptionalSNX(bool withSNX) internal view returns (bytes32[] memory) { bytes32[] memory currencyKeys = new bytes32[](availableSynths.length + (withSNX ? 1 : 0)); for (uint i = 0; i < availableSynths.length; i++) { currencyKeys[i] = synthsByAddress[address(availableSynths[i])]; } if (withSNX) { currencyKeys[availableSynths.length] = SNX; } return currencyKeys; } // Returns the total value of the debt pool in currency specified by `currencyKey`. // To return only the SNX-backed debt, set `excludeCollateral` to true. function _totalIssuedSynths(bytes32 currencyKey, bool excludeCollateral) internal view returns (uint totalIssued, bool anyRateIsInvalid) { (uint debt, , bool cacheIsInvalid, bool cacheIsStale) = debtCache().cacheInfo(); anyRateIsInvalid = cacheIsInvalid || cacheIsStale; IExchangeRates exRates = exchangeRates(); // Add total issued synths from non snx collateral back into the total if not excluded if (!excludeCollateral) { (uint nonSnxDebt, bool invalid) = debtCache().totalNonSnxBackedDebt(); debt = debt.add(nonSnxDebt); anyRateIsInvalid = anyRateIsInvalid || invalid; } if (currencyKey == sUSD) { return (debt, anyRateIsInvalid); } (uint currencyRate, bool currencyRateInvalid) = exRates.rateAndInvalid(currencyKey); return (debt.divideDecimalRound(currencyRate), anyRateIsInvalid || currencyRateInvalid); } function _debtBalanceOfAndTotalDebt(uint debtShareBalance, bytes32 currencyKey) internal view returns ( uint debtBalance, uint totalSystemValue, bool anyRateIsInvalid ) { // What's the total value of the system excluding ETH backed synths in their requested currency? (uint snxBackedAmount, , bool debtInfoStale) = allNetworksDebtInfo(); if (debtShareBalance == 0) { return (0, snxBackedAmount, debtInfoStale); } // existing functionality requires for us to convert into the exchange rate specified by `currencyKey` (uint currencyRate, bool currencyRateInvalid) = exchangeRates().rateAndInvalid(currencyKey); debtBalance = _debtForShares(debtShareBalance).divideDecimalRound(currencyRate); totalSystemValue = snxBackedAmount; anyRateIsInvalid = currencyRateInvalid || debtInfoStale; } function _canBurnSynths(address account) internal view returns (bool) { return now >= _lastIssueEvent(account).add(getMinimumStakeTime()); } function _lastIssueEvent(address account) internal view returns (uint) { // Get the timestamp of the last issue this account made return flexibleStorage().getUIntValue(CONTRACT_NAME, keccak256(abi.encodePacked(LAST_ISSUE_EVENT, account))); } function _remainingIssuableSynths(address _issuer) internal view returns ( uint maxIssuable, uint alreadyIssued, uint totalSystemDebt, bool anyRateIsInvalid ) { (alreadyIssued, totalSystemDebt, anyRateIsInvalid) = _debtBalanceOfAndTotalDebt( synthetixDebtShare().balanceOf(_issuer), sUSD ); (uint issuable, bool isInvalid) = _maxIssuableSynths(_issuer); maxIssuable = issuable; anyRateIsInvalid = anyRateIsInvalid || isInvalid; if (alreadyIssued >= maxIssuable) { maxIssuable = 0; } else { maxIssuable = maxIssuable.sub(alreadyIssued); } } function _snxToUSD(uint amount, uint snxRate) internal pure returns (uint) { return amount.multiplyDecimalRound(snxRate); } function _usdToSnx(uint amount, uint snxRate) internal pure returns (uint) { return amount.divideDecimalRound(snxRate); } function _maxIssuableSynths(address _issuer) internal view returns (uint, bool) { // What is the value of their SNX balance in sUSD (uint snxRate, bool isInvalid) = exchangeRates().rateAndInvalid(SNX); uint destinationValue = _snxToUSD(_collateral(_issuer), snxRate); // They're allowed to issue up to issuanceRatio of that value return (destinationValue.multiplyDecimal(getIssuanceRatio()), isInvalid); } function _collateralisationRatio(address _issuer) internal view returns (uint, bool) { uint totalOwnedSynthetix = _collateral(_issuer); (uint debtBalance, , bool anyRateIsInvalid) = _debtBalanceOfAndTotalDebt(synthetixDebtShare().balanceOf(_issuer), SNX); // it's more gas intensive to put this check here if they have 0 SNX, but it complies with the interface if (totalOwnedSynthetix == 0) return (0, anyRateIsInvalid); return (debtBalance.divideDecimalRound(totalOwnedSynthetix), anyRateIsInvalid); } function _collateral(address account) internal view returns (uint) { return synthetixERC20() .balanceOf(account) .add(synthetixEscrow().balanceOf(account)) .add(rewardEscrowV2().balanceOf(account)) .add(liquidatorRewards().earned(account)); } function minimumStakeTime() external view returns (uint) { return getMinimumStakeTime(); } function canBurnSynths(address account) external view returns (bool) { return _canBurnSynths(account); } function availableCurrencyKeys() external view returns (bytes32[] memory) { return _availableCurrencyKeysWithOptionalSNX(false); } function availableSynthCount() external view returns (uint) { return availableSynths.length; } function anySynthOrSNXRateIsInvalid() external view returns (bool anyRateInvalid) { (, anyRateInvalid) = exchangeRates().ratesAndInvalidForCurrencies(_availableCurrencyKeysWithOptionalSNX(true)); } function totalIssuedSynths(bytes32 currencyKey, bool excludeOtherCollateral) external view returns (uint totalIssued) { (totalIssued, ) = _totalIssuedSynths(currencyKey, excludeOtherCollateral); } function lastIssueEvent(address account) external view returns (uint) { return _lastIssueEvent(account); } function collateralisationRatio(address _issuer) external view returns (uint cratio) { (cratio, ) = _collateralisationRatio(_issuer); } function collateralisationRatioAndAnyRatesInvalid(address _issuer) external view returns (uint cratio, bool anyRateIsInvalid) { return _collateralisationRatio(_issuer); } function collateral(address account) external view returns (uint) { return _collateral(account); } function debtBalanceOf(address _issuer, bytes32 currencyKey) external view returns (uint debtBalance) { ISynthetixDebtShare sds = synthetixDebtShare(); // What was their initial debt ownership? uint debtShareBalance = sds.balanceOf(_issuer); // If it's zero, they haven't issued, and they have no debt. if (debtShareBalance == 0) return 0; (debtBalance, , ) = _debtBalanceOfAndTotalDebt(debtShareBalance, currencyKey); } function remainingIssuableSynths(address _issuer) external view returns ( uint maxIssuable, uint alreadyIssued, uint totalSystemDebt ) { (maxIssuable, alreadyIssued, totalSystemDebt, ) = _remainingIssuableSynths(_issuer); } function maxIssuableSynths(address _issuer) external view returns (uint) { (uint maxIssuable, ) = _maxIssuableSynths(_issuer); return maxIssuable; } function transferableSynthetixAndAnyRateIsInvalid(address account, uint balance) external view returns (uint transferable, bool anyRateIsInvalid) { // How many SNX do they have, excluding escrow? // Note: We're excluding escrow here because we're interested in their transferable amount // and escrowed SNX are not transferable. // How many of those will be locked by the amount they've issued? // Assuming issuance ratio is 20%, then issuing 20 SNX of value would require // 100 SNX to be locked in their wallet to maintain their collateralisation ratio // The locked synthetix value can exceed their balance. uint debtBalance; (debtBalance, , anyRateIsInvalid) = _debtBalanceOfAndTotalDebt(synthetixDebtShare().balanceOf(account), SNX); uint lockedSynthetixValue = debtBalance.divideDecimalRound(getIssuanceRatio()); // If we exceed the balance, no SNX are transferable, otherwise the difference is. if (lockedSynthetixValue >= balance) { transferable = 0; } else { transferable = balance.sub(lockedSynthetixValue); } } function getSynths(bytes32[] calldata currencyKeys) external view returns (ISynth[] memory) { uint numKeys = currencyKeys.length; ISynth[] memory addresses = new ISynth[](numKeys); for (uint i = 0; i < numKeys; i++) { addresses[i] = synths[currencyKeys[i]]; } return addresses; } /// @notice Provide the results that would be returned by the mutative liquidateAccount() method (that's reserved to Synthetix) /// @param account The account to be liquidated /// @param isSelfLiquidation boolean to determine if this is a forced or self-invoked liquidation /// @return totalRedeemed the total amount of collateral (SNX) to redeem (liquid and escrow) /// @return debtToRemove the amount of debt (sUSD) to burn in order to fix the account's c-ratio /// @return escrowToLiquidate the amount of escrow SNX that will be revoked during liquidation /// @return initialDebtBalance the amount of initial (sUSD) debt the account has function liquidationAmounts(address account, bool isSelfLiquidation) external view returns ( uint totalRedeemed, uint debtToRemove, uint escrowToLiquidate, uint initialDebtBalance ) { return _liquidationAmounts(account, isSelfLiquidation); } /* ========== MUTATIVE FUNCTIONS ========== */ function _addSynth(ISynth synth) internal { bytes32 currencyKey = synth.currencyKey(); require(synths[currencyKey] == ISynth(0), "Synth exists"); require(synthsByAddress[address(synth)] == bytes32(0), "Synth address already exists"); availableSynths.push(synth); synths[currencyKey] = synth; synthsByAddress[address(synth)] = currencyKey; emit SynthAdded(currencyKey, address(synth)); } function addSynth(ISynth synth) external onlyOwner { _addSynth(synth); // Invalidate the cache to force a snapshot to be recomputed. If a synth were to be added // back to the system and it still somehow had cached debt, this would force the value to be // updated. debtCache().updateDebtCacheValidity(true); } function addSynths(ISynth[] calldata synthsToAdd) external onlyOwner { uint numSynths = synthsToAdd.length; for (uint i = 0; i < numSynths; i++) { _addSynth(synthsToAdd[i]); } // Invalidate the cache to force a snapshot to be recomputed. debtCache().updateDebtCacheValidity(true); } function _removeSynth(bytes32 currencyKey) internal { address synthToRemove = address(synths[currencyKey]); require(synthToRemove != address(0), "Synth does not exist"); require(currencyKey != sUSD, "Cannot remove synth"); uint synthSupply = IERC20(synthToRemove).totalSupply(); if (synthSupply > 0) { (uint amountOfsUSD, uint rateToRedeem, ) = exchangeRates().effectiveValueAndRates(currencyKey, synthSupply, "sUSD"); require(rateToRedeem > 0, "Cannot remove without rate"); ISynthRedeemer _synthRedeemer = synthRedeemer(); synths[sUSD].issue(address(_synthRedeemer), amountOfsUSD); // ensure the debt cache is aware of the new sUSD issued debtCache().updateCachedsUSDDebt(SafeCast.toInt256(amountOfsUSD)); _synthRedeemer.deprecate(IERC20(address(Proxyable(synthToRemove).proxy())), rateToRedeem); } // Remove the synth from the availableSynths array. for (uint i = 0; i < availableSynths.length; i++) { if (address(availableSynths[i]) == synthToRemove) { delete availableSynths[i]; // Copy the last synth into the place of the one we just deleted // If there's only one synth, this is synths[0] = synths[0]. // If we're deleting the last one, it's also a NOOP in the same way. availableSynths[i] = availableSynths[availableSynths.length - 1]; // Decrease the size of the array by one. availableSynths.length--; break; } } // And remove it from the synths mapping delete synthsByAddress[synthToRemove]; delete synths[currencyKey]; emit SynthRemoved(currencyKey, synthToRemove); } function removeSynth(bytes32 currencyKey) external onlyOwner { // Remove its contribution from the debt pool snapshot, and // invalidate the cache to force a new snapshot. IIssuerInternalDebtCache cache = debtCache(); cache.updateCachedSynthDebtWithRate(currencyKey, 0); cache.updateDebtCacheValidity(true); _removeSynth(currencyKey); } function removeSynths(bytes32[] calldata currencyKeys) external onlyOwner { uint numKeys = currencyKeys.length; // Remove their contributions from the debt pool snapshot, and // invalidate the cache to force a new snapshot. IIssuerInternalDebtCache cache = debtCache(); uint[] memory zeroRates = new uint[](numKeys); cache.updateCachedSynthDebtsWithRates(currencyKeys, zeroRates); cache.updateDebtCacheValidity(true); for (uint i = 0; i < numKeys; i++) { _removeSynth(currencyKeys[i]); } } function issueSynthsWithoutDebt( bytes32 currencyKey, address to, uint amount ) external onlyTrustedMinters returns (bool rateInvalid) { require(address(synths[currencyKey]) != address(0), "Issuer: synth doesn't exist"); require(amount > 0, "Issuer: cannot issue 0 synths"); // record issue timestamp _setLastIssueEvent(to); // Create their synths synths[currencyKey].issue(to, amount); // Account for the issued debt in the cache (uint rate, bool rateInvalid) = exchangeRates().rateAndInvalid(currencyKey); debtCache().updateCachedsUSDDebt(SafeCast.toInt256(amount.multiplyDecimal(rate))); // returned so that the caller can decide what to do if the rate is invalid return rateInvalid; } function burnSynthsWithoutDebt( bytes32 currencyKey, address from, uint amount ) external onlyTrustedMinters returns (bool rateInvalid) { require(address(synths[currencyKey]) != address(0), "Issuer: synth doesn't exist"); require(amount > 0, "Issuer: cannot issue 0 synths"); exchanger().settle(from, currencyKey); // Burn some synths synths[currencyKey].burn(from, amount); // Account for the burnt debt in the cache. If rate is invalid, the user won't be able to exchange (uint rate, bool rateInvalid) = exchangeRates().rateAndInvalid(currencyKey); debtCache().updateCachedsUSDDebt(-SafeCast.toInt256(amount.multiplyDecimal(rate))); // returned so that the caller can decide what to do if the rate is invalid return rateInvalid; } /** * Function used to migrate balances from the CollateralShort contract * @param short The address of the CollateralShort contract to be upgraded * @param amount The amount of sUSD collateral to be burnt */ function upgradeCollateralShort(address short, uint amount) external onlyOwner { require(short != address(0), "Issuer: invalid address"); require(short == resolver.getAddress("CollateralShortLegacy"), "Issuer: wrong short address"); require(address(synths[sUSD]) != address(0), "Issuer: synth doesn't exist"); require(amount > 0, "Issuer: cannot burn 0 synths"); exchanger().settle(short, sUSD); synths[sUSD].burn(short, amount); } function issueSynths(address from, uint amount) external onlySynthetix { require(amount > 0, "Issuer: cannot issue 0 synths"); _issueSynths(from, amount, false); } function issueMaxSynths(address from) external onlySynthetix { _issueSynths(from, 0, true); } function issueSynthsOnBehalf( address issueForAddress, address from, uint amount ) external onlySynthetix { _requireCanIssueOnBehalf(issueForAddress, from); _issueSynths(issueForAddress, amount, false); } function issueMaxSynthsOnBehalf(address issueForAddress, address from) external onlySynthetix { _requireCanIssueOnBehalf(issueForAddress, from); _issueSynths(issueForAddress, 0, true); } function burnSynths(address from, uint amount) external onlySynthetix { _voluntaryBurnSynths(from, amount, false); } function burnSynthsOnBehalf( address burnForAddress, address from, uint amount ) external onlySynthetix { _requireCanBurnOnBehalf(burnForAddress, from); _voluntaryBurnSynths(burnForAddress, amount, false); } function burnSynthsToTarget(address from) external onlySynthetix { _voluntaryBurnSynths(from, 0, true); } function burnSynthsToTargetOnBehalf(address burnForAddress, address from) external onlySynthetix { _requireCanBurnOnBehalf(burnForAddress, from); _voluntaryBurnSynths(burnForAddress, 0, true); } function burnForRedemption( address deprecatedSynthProxy, address account, uint balance ) external onlySynthRedeemer { ISynth(IProxy(deprecatedSynthProxy).target()).burn(account, balance); } // SIP-148: Upgraded Liquidation Mechanism /// @notice This is where the core internal liquidation logic resides. This function can only be invoked by Synthetix. /// Reverts if liquidator().isLiquidationOpen() returns false (e.g. c-ratio is too high, delay hasn't passed, /// account wasn't flagged etc) /// @param account The account to be liquidated /// @param isSelfLiquidation boolean to determine if this is a forced or self-invoked liquidation /// @return totalRedeemed the total amount of collateral (SNX) to redeem (liquid and escrow) /// @return debtRemoved the amount of debt (sUSD) to burn in order to fix the account's c-ratio /// @return escrowToLiquidate the amount of escrow SNX that will be revoked during liquidation function liquidateAccount(address account, bool isSelfLiquidation) external onlySynthetix returns ( uint totalRedeemed, uint debtRemoved, uint escrowToLiquidate ) { require(liquidator().isLiquidationOpen(account, isSelfLiquidation), "Not open for liquidation"); // liquidationAmounts checks isLiquidationOpen for the account uint initialDebtBalance; (totalRedeemed, debtRemoved, escrowToLiquidate, initialDebtBalance) = _liquidationAmounts( account, isSelfLiquidation ); // Reduce debt shares by amount to liquidate. _removeFromDebtRegister(account, debtRemoved, initialDebtBalance); // Remove liquidation flag liquidator().removeAccountInLiquidation(account); } function _liquidationAmounts(address account, bool isSelfLiquidation) internal view returns ( uint totalRedeemed, uint debtToRemove, uint escrowToLiquidate, uint debtBalance ) { // Get the account's debt balance bool anyRateIsInvalid; (debtBalance, , anyRateIsInvalid) = _debtBalanceOfAndTotalDebt(synthetixDebtShare().balanceOf(account), sUSD); // otherwise calculateAmountToFixCollateral reverts with unhelpful underflow error if (!liquidator().isLiquidationOpen(account, isSelfLiquidation)) { return (0, 0, 0, debtBalance); } // Get the penalty for the liquidation type uint penalty = isSelfLiquidation ? getSelfLiquidationPenalty() : getSnxLiquidationPenalty(); // Get the SNX rate (uint snxRate, bool snxRateInvalid) = exchangeRates().rateAndInvalid(SNX); _requireRatesNotInvalid(anyRateIsInvalid || snxRateInvalid); // Get the total amount of SNX collateral (including escrows and rewards) uint collateralForAccount = _collateral(account); // Calculate the amount of debt to liquidate to fix c-ratio debtToRemove = liquidator().calculateAmountToFixCollateral( debtBalance, _snxToUSD(collateralForAccount, snxRate), penalty ); // Get the equivalent amount of SNX for the amount to liquidate // Note: While calculateAmountToFixCollateral takes the penalty into account, // it only calculates the debt to be repaid (so that c-ratio is reached). The penalty still needs to be // applied on the collateral side (SNX) correctly. Which is why redeemTarget needs to be multiplied by 1 + penalty // to get the SNX amount calculateAmountToFixCollateral was using for its calculation. // This is a "target" because it may not be available, so will be adjusted uint redeemTarget = _usdToSnx(debtToRemove, snxRate).multiplyDecimal(SafeDecimalMath.unit().add(penalty)); // calculate actually redeemable collateral for the conditions (totalRedeemed, escrowToLiquidate) = _redeemableCollateralForTarget(account, redeemTarget, isSelfLiquidation); // totalRedeemed == redeemTarget, all of the debtToRemove is removed, otherwise adjust it to redeemable collateral if (totalRedeemed < redeemTarget) { // Adjust debt amount to ratio of actual vs. target collateral amounts debtToRemove = debtToRemove.multiplyDecimal(totalRedeemed).divideDecimal(redeemTarget); // if all collateral is gone, erase the bad debt (some unliquidatable collateral can be in // legacy SynthetixEscrow or LiquidatorRewards (if Synthetix liquidation method didn't call getReward() before this) // Note that collateralForAccount cannot be < totalRedeemed, because totalRedeemed comes from an exact // calculation in _redeemableCollateralForTarget(). If the calculations change to create a possibility // for a rounding imprecision, this check may need to be changed to `<=`. if (collateralForAccount == totalRedeemed) { debtToRemove = debtBalance; } } return (totalRedeemed, debtToRemove, escrowToLiquidate, debtBalance); } // SIP-252 // calculates the amount of SNX that can be liquidated (redeemed) for the various cases // of transferrable & escrowed collateral & self or forced liquidation function _redeemableCollateralForTarget( address account, uint redeemTarget, bool isSelfLiquidation ) internal view returns (uint totalRedeemed, uint escrowToLiquidate) { // The balanceOf here can be considered "transferable" since it's not escrowed, // and it is the only SNX that can potentially be transfered if unstaked. uint transferable = synthetixERC20().balanceOf(account); if (redeemTarget <= transferable) { // transferrable is enough return (redeemTarget, 0); } else { // if transferrable is not enough if (isSelfLiquidation) { // cannot use escrow because it's not available for self-liquidation return (transferable, 0); } else { // can use escrow if forced liquidation uint escrow = rewardEscrowV2().balanceOf(account); if (redeemTarget > transferable.add(escrow)) { // all of escrow needs to be redeemed return (transferable.add(escrow), escrow); } else { // need only part of the escrow, add the needed part to redeemed escrowToLiquidate = redeemTarget.sub(transferable); return (transferable.add(escrowToLiquidate), escrowToLiquidate); } } } } function setCurrentPeriodId(uint128 periodId) external { require(msg.sender == requireAndGetAddress(CONTRACT_FEEPOOL), "Must be fee pool"); ISynthetixDebtShare sds = synthetixDebtShare(); if (sds.currentPeriodId() < periodId) { sds.takeSnapshot(periodId); } } /* ========== INTERNAL FUNCTIONS ========== */ function _requireRatesNotInvalid(bool anyRateIsInvalid) internal pure { require(!anyRateIsInvalid, "A synth or SNX rate is invalid"); } function _requireCanIssueOnBehalf(address issueForAddress, address from) internal view { require(delegateApprovals().canIssueFor(issueForAddress, from), "Not approved to act on behalf"); } function _requireCanBurnOnBehalf(address burnForAddress, address from) internal view { require(delegateApprovals().canBurnFor(burnForAddress, from), "Not approved to act on behalf"); } function _issueSynths( address from, uint amount, bool issueMax ) internal { if (_verifyCircuitBreakers()) { return; } (uint maxIssuable, , , bool anyRateIsInvalid) = _remainingIssuableSynths(from); _requireRatesNotInvalid(anyRateIsInvalid); if (!issueMax) { require(amount <= maxIssuable, "Amount too large"); } else { amount = maxIssuable; } // Keep track of the debt they're about to create _addToDebtRegister(from, amount); // record issue timestamp _setLastIssueEvent(from); // Create their synths synths[sUSD].issue(from, amount); // Account for the issued debt in the cache debtCache().updateCachedsUSDDebt(SafeCast.toInt256(amount)); } function _burnSynths( address debtAccount, address burnAccount, uint amount, uint existingDebt ) internal returns (uint amountBurnt) { if (_verifyCircuitBreakers()) { return 0; } // liquidation requires sUSD to be already settled / not in waiting period // If they're trying to burn more debt than they actually owe, rather than fail the transaction, let's just // clear their debt and leave them be. amountBurnt = existingDebt < amount ? existingDebt : amount; // Remove liquidated debt from the ledger _removeFromDebtRegister(debtAccount, amountBurnt, existingDebt); // synth.burn does a safe subtraction on balance (so it will revert if there are not enough synths). synths[sUSD].burn(burnAccount, amountBurnt); // Account for the burnt debt in the cache. debtCache().updateCachedsUSDDebt(-SafeCast.toInt256(amountBurnt)); } // If burning to target, `amount` is ignored, and the correct quantity of sUSD is burnt to reach the target // c-ratio, allowing fees to be claimed. In this case, pending settlements will be skipped as the user // will still have debt remaining after reaching their target. function _voluntaryBurnSynths( address from, uint amount, bool burnToTarget ) internal { if (_verifyCircuitBreakers()) { return; } if (!burnToTarget) { // If not burning to target, then burning requires that the minimum stake time has elapsed. require(_canBurnSynths(from), "Minimum stake time not reached"); // First settle anything pending into sUSD as burning or issuing impacts the size of the debt pool (, uint refunded, uint numEntriesSettled) = exchanger().settle(from, sUSD); if (numEntriesSettled > 0) { amount = exchanger().calculateAmountAfterSettlement(from, sUSD, amount, refunded); } } (uint existingDebt, , bool anyRateIsInvalid) = _debtBalanceOfAndTotalDebt(synthetixDebtShare().balanceOf(from), sUSD); (uint maxIssuableSynthsForAccount, bool snxRateInvalid) = _maxIssuableSynths(from); _requireRatesNotInvalid(anyRateIsInvalid || snxRateInvalid); require(existingDebt > 0, "No debt to forgive"); if (burnToTarget) { amount = existingDebt.sub(maxIssuableSynthsForAccount); } uint amountBurnt = _burnSynths(from, from, amount, existingDebt); // Check and remove liquidation if existingDebt after burning is <= maxIssuableSynths // Issuance ratio is fixed so should remove any liquidations if (existingDebt.sub(amountBurnt) <= maxIssuableSynthsForAccount) { liquidator().removeAccountInLiquidation(from); } } function _setLastIssueEvent(address account) internal { // Set the timestamp of the last issueSynths flexibleStorage().setUIntValue( CONTRACT_NAME, keccak256(abi.encodePacked(LAST_ISSUE_EVENT, account)), block.timestamp ); } function _addToDebtRegister(address from, uint amount) internal { // important: this has to happen before any updates to user's debt shares liquidatorRewards().updateEntry(from); ISynthetixDebtShare sds = synthetixDebtShare(); // it is possible (eg in tests, system initialized with extra debt) to have issued debt without any shares issued // in which case, the first account to mint gets the debt. yw. uint debtShares = _sharesForDebt(amount); if (debtShares == 0) { sds.mintShare(from, amount); } else { sds.mintShare(from, debtShares); } } function _removeFromDebtRegister( address from, uint debtToRemove, uint existingDebt ) internal { // important: this has to happen before any updates to user's debt shares liquidatorRewards().updateEntry(from); ISynthetixDebtShare sds = synthetixDebtShare(); uint currentDebtShare = sds.balanceOf(from); if (debtToRemove == existingDebt) { sds.burnShare(from, currentDebtShare); } else { uint sharesToRemove = _sharesForDebt(debtToRemove); sds.burnShare(from, sharesToRemove < currentDebtShare ? sharesToRemove : currentDebtShare); } } // trips the breaker and returns boolean, where true means the breaker has tripped state function _verifyCircuitBreakers() internal returns (bool) { address debtRatioAggregator = requireAndGetAddress(CONTRACT_EXT_AGGREGATOR_DEBT_RATIO); (, int256 rawRatio, , , ) = AggregatorV2V3Interface(debtRatioAggregator).latestRoundData(); (, bool broken, ) = exchangeRates().rateWithSafetyChecks(SNX); return circuitBreaker().probeCircuitBreaker(debtRatioAggregator, uint(rawRatio)) || broken; } /* ========== MODIFIERS ========== */ modifier onlySynthetix() { require(msg.sender == address(synthetixERC20()), "Issuer: Only Synthetix"); _; } modifier onlyTrustedMinters() { address bridgeL1 = resolver.getAddress(CONTRACT_SYNTHETIXBRIDGETOOPTIMISM); address bridgeL2 = resolver.getAddress(CONTRACT_SYNTHETIXBRIDGETOBASE); require(msg.sender == bridgeL1 || msg.sender == bridgeL2, "Issuer: only trusted minters"); require(bridgeL1 == address(0) || bridgeL2 == address(0), "Issuer: one minter must be 0x0"); _; } function _onlySynthRedeemer() internal view { require(msg.sender == address(synthRedeemer()), "Issuer: Only SynthRedeemer"); } modifier onlySynthRedeemer() { _onlySynthRedeemer(); _; } /* ========== EVENTS ========== */ event SynthAdded(bytes32 currencyKey, address synth); event SynthRemoved(bytes32 currencyKey, address synth); }
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ts":[],"name":"resolver","outputs":[{"internalType":"contract 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":"uint128","name":"periodId","type":"uint128"}],"name":"setCurrentPeriodId","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"synths","outputs":[{"internalType":"contract ISynth","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"synthsByAddress","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"currencyKey","type":"bytes32"},{"internalType":"bool","name":"excludeOtherCollateral","type":"bool"}],"name":"totalIssuedSynths","outputs":[{"internalType":"uint256","name":"totalIssued","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"balance","type":"uint256"}],"name":"transferableSynthetixAndAnyRateIsInvalid","outputs":[{"internalType":"uint256","name":"transferable","type":"uint256"},{"internalType":"bool","name":"anyRateIsInvalid","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"short","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"upgradeCollateralShort","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)
00000000000000000000000073570075092502472e4b61a7058df1a4a1db12f20000000000000000000000009fc84992df5496797784374b810e04238728743d
-----Decoded View---------------
Arg [0] : _owner (address): 0x73570075092502472E4b61A7058Df1A4a1DB12f2
Arg [1] : _resolver (address): 0x9Fc84992dF5496797784374B810E04238728743d
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000073570075092502472e4b61a7058df1a4a1db12f2
Arg [1] : 0000000000000000000000009fc84992df5496797784374b810e04238728743d
Library Used
SafeDecimalMath : 0x6bb3b18694a6849654379f040dcb112e07da9dc7
SystemSettingsLib : 0x83732c3ed8f24af9b87dacdc23b0fe40abb77337
SignedSafeDecimalMath : 0x6d2ea159c128ec361a9a23b1456ef0aad0bec46b