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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 sepolia-optimism.etherscan.io on 2024-04-11
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* 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) 2024 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);
function burnAndIssueSynthsWithoutDebtCache(
address account,
bytes32 currencyKey,
uint amountOfSynth,
uint amountInsUSD
) external;
function modifyDebtSharesForMigration(address account, uint amount) external;
}
// 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))
);
}
function getExchangeMaxDynamicFee() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_EXCHANGE_MAX_DYNAMIC_FEE);
}
function getExchangeDynamicFeeRounds() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_EXCHANGE_DYNAMIC_FEE_ROUNDS);
}
function getExchangeDynamicFeeThreshold() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_EXCHANGE_DYNAMIC_FEE_THRESHOLD);
}
function getExchangeDynamicFeeWeightDecay() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_EXCHANGE_DYNAMIC_FEE_WEIGHT_DECAY);
}
}
// 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;
}
pragma experimental ABIEncoderV2;
// 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;
uint sourceAmountAfterSettlement;
}
// 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
);
}
// Used to have strongly-typed access to internal mutative functions in Synthetix
interface ISynthetixInternal {
function emitExchangeTracking(
bytes32 trackingCode,
bytes32 toCurrencyKey,
uint256 toAmount,
uint256 fee
) external;
function emitSynthExchange(
address account,
bytes32 fromCurrencyKey,
uint fromAmount,
bytes32 toCurrencyKey,
uint toAmount,
address toAddress
) external;
function emitAtomicSynthExchange(
address account,
bytes32 fromCurrencyKey,
uint fromAmount,
bytes32 toCurrencyKey,
uint toAmount,
address toAddress
) external;
function emitExchangeReclaim(
address account,
bytes32 currencyKey,
uint amount
) external;
function emitExchangeRebate(
address account,
bytes32 currencyKey,
uint amount
) external;
}
interface IExchangerInternalDebtCache {
function updateCachedSynthDebtsWithRates(bytes32[] calldata currencyKeys, uint[] calldata currencyRates) external;
function updateCachedSynthDebts(bytes32[] calldata currencyKeys) 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/IDirectIntegration
interface IDirectIntegrationManager {
struct ParameterIntegrationSettings {
bytes32 currencyKey;
address dexPriceAggregator;
address atomicEquivalentForDexPricing;
uint atomicExchangeFeeRate;
uint atomicTwapWindow;
uint atomicMaxVolumePerBlock;
uint atomicVolatilityConsiderationWindow;
uint atomicVolatilityUpdateThreshold;
uint exchangeFeeRate;
uint exchangeMaxDynamicFee;
uint exchangeDynamicFeeRounds;
uint exchangeDynamicFeeThreshold;
uint exchangeDynamicFeeWeightDecay;
}
function getExchangeParameters(address integration, bytes32 key)
external
view
returns (ParameterIntegrationSettings memory settings);
function setExchangeParameters(
address integration,
bytes32[] calldata currencyKeys,
ParameterIntegrationSettings calldata params
) 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 effectiveAtomicValueAndRates(
IDirectIntegrationManager.ParameterIntegrationSettings calldata sourceSettings,
uint sourceAmount,
IDirectIntegrationManager.ParameterIntegrationSettings calldata destinationSettings,
IDirectIntegrationManager.ParameterIntegrationSettings calldata usdSettings
)
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 synthTooVolatileForAtomicExchange(IDirectIntegrationManager.ParameterIntegrationSettings calldata settings)
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_LIQUIDATOR = "Liquidator";
bytes32 private constant CONTRACT_LIQUIDATOR_REWARDS = "LiquidatorRewards";
bytes32 private constant CONTRACT_DEBTCACHE = "DebtCache";
bytes32 private constant CONTRACT_DYNAMICSYNTHREDEEMER = "DynamicSynthRedeemer";
bytes32 private constant CONTRACT_SYNTHREDEEMER = "SynthRedeemer";
bytes32 private constant CONTRACT_SYNTHETIXBRIDGETOOPTIMISM = "SynthetixBridgeToOptimism";
bytes32 private constant CONTRACT_SYNTHETIXBRIDGETOBASE = "SynthetixBridgeToBase";
bytes32 private constant CONTRACT_DEBT_MIGRATOR_ON_ETHEREUM = "DebtMigratorOnEthereum";
bytes32 private constant CONTRACT_DEBT_MIGRATOR_ON_OPTIMISM = "DebtMigratorOnOptimism";
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_LIQUIDATOR;
newAddresses[9] = CONTRACT_LIQUIDATOR_REWARDS;
newAddresses[10] = CONTRACT_DEBTCACHE;
newAddresses[11] = CONTRACT_SYNTHREDEEMER;
newAddresses[12] = CONTRACT_DYNAMICSYNTHREDEEMER;
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 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, ) =
_latestRoundData(requireAndGetAddress(CONTRACT_EXT_AGGREGATOR_ISSUED_SYNTHS));
(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 _rateAndInvalid(bytes32 currencyKey) internal view returns (uint, bool) {
return exchangeRates().rateAndInvalid(currencyKey);
}
function _latestRoundData(address aggregator)
internal
view
returns (
uint80,
int256,
uint256,
uint256,
uint80
)
{
return AggregatorV2V3Interface(aggregator).latestRoundData();
}
function _rawDebtRatioAndUpdatedAt() internal view returns (uint, uint) {
(, int256 rawRatioInt, , uint ratioUpdatedAt, ) =
_latestRoundData(requireAndGetAddress(CONTRACT_EXT_AGGREGATOR_DEBT_RATIO));
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 _debtShareBalanceOf(address account) internal view returns (uint) {
return synthetixDebtShare().balanceOf(account);
}
function _snxBalanceOf(address account) internal view returns (uint) {
return synthetixERC20().balanceOf(account);
}
function _rewardEscrowBalanceOf(address account) internal view returns (uint) {
return rewardEscrowV2().balanceOf(account);
}
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;
// 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) = _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) = _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(_debtShareBalanceOf(_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) = _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(_debtShareBalanceOf(_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 _snxBalanceOf(account).add(_rewardEscrowBalanceOf(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) {
// What was their initial debt ownership?
uint debtShareBalance = _debtShareBalanceOf(_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(_debtShareBalanceOf(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), "synth doesn't exist");
require(amount > 0, "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) = _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), "synth doesn't exist");
require(amount > 0, "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) = _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;
}
/**
* SIP-2059: Dynamic Redemption
* Function used to burn spot synths and issue the equivalent in sUSD at chainlink price * discount rate
* @param account The address of the account that is redeeming
* @param currencyKey The synth to be redeemed
* @param amountOfSynth The amount of redeeming synth to burn
* @param amountInsUSD The amount of sUSD to issue
*/
function burnAndIssueSynthsWithoutDebtCache(
address account,
bytes32 currencyKey,
uint amountOfSynth,
uint amountInsUSD
) external onlySynthRedeemer {
exchanger().settle(account, currencyKey);
// Burn their redeemed synths
synths[currencyKey].burn(account, amountOfSynth);
// record issue timestamp
_setLastIssueEvent(account);
// Issuer their sUSD equivalent
synths[sUSD].issue(account, amountInsUSD);
}
/**
* SIP-237: Debt Migration
* Function used for the one-way migration of all debt and liquid + escrowed SNX from L1 -> L2
* @param account The address of the account that is being migrated
* @param amount The amount of debt shares moving across layers
*/
function modifyDebtSharesForMigration(address account, uint amount) external onlyTrustedMigrators {
ISynthetixDebtShare sds = synthetixDebtShare();
if (msg.sender == resolver.getAddress(CONTRACT_DEBT_MIGRATOR_ON_ETHEREUM)) {
sds.burnShare(account, amount);
} else if (msg.sender == resolver.getAddress(CONTRACT_DEBT_MIGRATOR_ON_OPTIMISM)) {
sds.mintShare(account, amount);
}
}
function issueSynths(address from, uint amount) external onlySynthetix {
require(amount > 0, "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);
if (!isSelfLiquidation) {
// In case of forced liquidation only, remove the liquidation flag.
liquidator().removeAccountInLiquidation(account);
}
// Note: To remove the flag after self liquidation, burn to target and then call Liquidator.checkAndRemoveAccountInLiquidation(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(_debtShareBalanceOf(account), sUSD);
// Get the SNX rate
(uint snxRate, bool snxRateInvalid) = _rateAndInvalid(SNX);
_requireRatesNotInvalid(anyRateIsInvalid || snxRateInvalid);
uint penalty;
if (isSelfLiquidation) {
// Get self liquidation penalty
penalty = getSelfLiquidationPenalty();
// Calculate the amount of debt to remove and SNX to redeem for a self liquidation
debtToRemove = liquidator().calculateAmountToFixCollateral(
debtBalance,
_snxToUSD(_collateral(account), snxRate),
penalty
);
// Get the minimum values for both totalRedeemed and debtToRemove
totalRedeemed = _getMinValue(
_usdToSnx(debtToRemove, snxRate).multiplyDecimal(SafeDecimalMath.unit().add(penalty)),
_snxBalanceOf(account)
);
debtToRemove = _getMinValue(
_snxToUSD(totalRedeemed, snxRate).divideDecimal(SafeDecimalMath.unit().add(penalty)),
debtToRemove
);
// Return escrow as zero since it cannot be self liquidated
return (totalRedeemed, debtToRemove, 0, debtBalance);
} else {
// In the case of forced Liquidation
// Get the forced liquidation penalty and sum of the flag and liquidate rewards.
penalty = getSnxLiquidationPenalty();
uint rewardsSum = getLiquidateReward().add(getFlagReward());
// Get the total USD value of their SNX collateral (including escrow and rewards minus the flag and liquidate rewards)
uint collateralForAccountUSD = _snxToUSD(_collateral(account).sub(rewardsSum), snxRate);
// Calculate the amount of debt to remove and the sUSD value of the SNX required to liquidate.
debtToRemove = liquidator().calculateAmountToFixCollateral(debtBalance, collateralForAccountUSD, penalty);
uint redeemTarget = _usdToSnx(debtToRemove, snxRate).multiplyDecimal(SafeDecimalMath.unit().add(penalty));
if (redeemTarget.add(rewardsSum) >= _collateral(account)) {
// need to wipe out the account
debtToRemove = debtBalance;
totalRedeemed = _collateral(account).sub(rewardsSum);
escrowToLiquidate = _rewardEscrowBalanceOf(account);
return (totalRedeemed, debtToRemove, escrowToLiquidate, debtBalance);
} else {
// normal forced liquidation
(totalRedeemed, escrowToLiquidate) = _redeemableCollateralForTarget(account, redeemTarget, rewardsSum);
return (totalRedeemed, debtToRemove, escrowToLiquidate, debtBalance);
}
}
}
// SIP-252
// calculates the amount of SNX that can be force liquidated (redeemed)
// for the various cases of transferrable & escrowed collateral
function _redeemableCollateralForTarget(
address account,
uint redeemTarget,
uint rewardsSum
) 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 = _snxBalanceOf(account);
if (redeemTarget.add(rewardsSum) <= transferable) {
// transferable is enough
return (redeemTarget, 0);
} else {
// if transferable is not enough
// need only part of the escrow, add the needed part to redeemed
escrowToLiquidate = redeemTarget.add(rewardsSum).sub(transferable);
return (redeemTarget, escrowToLiquidate);
}
}
function _getMinValue(uint x, uint y) internal pure returns (uint) {
return x < y ? x : y;
}
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(_debtShareBalanceOf(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 = _debtShareBalanceOf(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()), "Only Synthetix");
_;
}
modifier onlyTrustedMinters() {
address bridgeL1 = resolver.getAddress(CONTRACT_SYNTHETIXBRIDGETOOPTIMISM);
address bridgeL2 = resolver.getAddress(CONTRACT_SYNTHETIXBRIDGETOBASE);
address feePool = resolver.getAddress(CONTRACT_FEEPOOL);
require(msg.sender == bridgeL1 || msg.sender == bridgeL2 || msg.sender == feePool, "only trusted minters");
_;
}
modifier onlyTrustedMigrators() {
address migratorL1 = resolver.getAddress(CONTRACT_DEBT_MIGRATOR_ON_ETHEREUM);
address migratorL2 = resolver.getAddress(CONTRACT_DEBT_MIGRATOR_ON_OPTIMISM);
require(msg.sender == migratorL1 || msg.sender == migratorL2, "only trusted migrators");
require(migratorL1 == address(0) || migratorL2 == address(0), "one migrator must be 0x0");
_;
}
function _onlySynthRedeemer() internal view {
require(
msg.sender == address(synthRedeemer()) || msg.sender == resolver.getAddress(CONTRACT_DYNAMICSYNTHREDEEMER),
"Only SynthRedeemer"
);
}
modifier onlySynthRedeemer() {
_onlySynthRedeemer();
_;
}
/* ========== EVENTS ========== */
event SynthAdded(bytes32 currencyKey, address synth);
event SynthRemoved(bytes32 currencyKey, address synth);
}[{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_resolver","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"name","type":"bytes32"},{"indexed":false,"internalType":"address","name":"destination","type":"address"}],"name":"CacheUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldOwner","type":"address"},{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerNominated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"currencyKey","type":"bytes32"},{"indexed":false,"internalType":"address","name":"synth","type":"address"}],"name":"SynthAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"currencyKey","type":"bytes32"},{"indexed":false,"internalType":"address","name":"synth","type":"address"}],"name":"SynthRemoved","type":"event"},{"constant":true,"inputs":[],"name":"CONTRACT_NAME","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"acceptOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"contract ISynth","name":"synth","type":"address"}],"name":"addSynth","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"contract ISynth[]","name":"synthsToAdd","type":"address[]"}],"name":"addSynths","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"allNetworksDebtInfo","outputs":[{"internalType":"uint256","name":"debt","type":"uint256"},{"internalType":"uint256","name":"sharesSupply","type":"uint256"},{"internalType":"bool","name":"isStale","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"anySynthOrSNXRateIsInvalid","outputs":[{"internalType":"bool","name":"anyRateInvalid","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"availableCurrencyKeys","outputs":[{"internalType":"bytes32[]","name":"","type":"bytes32[]"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"availableSynthCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"availableSynths","outputs":[{"internalType":"contract ISynth","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"currencyKey","type":"bytes32"},{"internalType":"uint256","name":"amountOfSynth","type":"uint256"},{"internalType":"uint256","name":"amountInsUSD","type":"uint256"}],"name":"burnAndIssueSynthsWithoutDebtCache","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"deprecatedSynthProxy","type":"address"},{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"balance","type":"uint256"}],"name":"burnForRedemption","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnSynths","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"burnForAddress","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnSynthsOnBehalf","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"}],"name":"burnSynthsToTarget","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"burnForAddress","type":"address"},{"internalType":"address","name":"from","type":"address"}],"name":"burnSynthsToTargetOnBehalf","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"currencyKey","type":"bytes32"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnSynthsWithoutDebt","outputs":[{"internalType":"bool","name":"rateInvalid","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"canBurnSynths","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"collateral","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"_issuer","type":"address"}],"name":"collateralisationRatio","outputs":[{"internalType":"uint256","name":"cratio","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"_issuer","type":"address"}],"name":"collateralisationRatioAndAnyRatesInvalid","outputs":[{"internalType":"uint256","name":"cratio","type":"uint256"},{"internalType":"bool","name":"anyRateIsInvalid","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"_issuer","type":"address"},{"internalType":"bytes32","name":"currencyKey","type":"bytes32"}],"name":"debtBalanceOf","outputs":[{"internalType":"uint256","name":"debtBalance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32[]","name":"currencyKeys","type":"bytes32[]"}],"name":"getSynths","outputs":[{"internalType":"contract ISynth[]","name":"","type":"address[]"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isResolverCached","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"issuanceRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"}],"name":"issueMaxSynths","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"issueForAddress","type":"address"},{"internalType":"address","name":"from","type":"address"}],"name":"issueMaxSynthsOnBehalf","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"issueSynths","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"issueForAddress","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"issueSynthsOnBehalf","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"currencyKey","type":"bytes32"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"issueSynthsWithoutDebt","outputs":[{"internalType":"bool","name":"rateInvalid","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"lastIssueEvent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bool","name":"isSelfLiquidation","type":"bool"}],"name":"liquidateAccount","outputs":[{"internalType":"uint256","name":"totalRedeemed","type":"uint256"},{"internalType":"uint256","name":"debtRemoved","type":"uint256"},{"internalType":"uint256","name":"escrowToLiquidate","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bool","name":"isSelfLiquidation","type":"bool"}],"name":"liquidationAmounts","outputs":[{"internalType":"uint256","name":"totalRedeemed","type":"uint256"},{"internalType":"uint256","name":"debtToRemove","type":"uint256"},{"internalType":"uint256","name":"escrowToLiquidate","type":"uint256"},{"internalType":"uint256","name":"initialDebtBalance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"_issuer","type":"address"}],"name":"maxIssuableSynths","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"minimumStakeTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"modifyDebtSharesForMigration","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"nominateNewOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"nominatedOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"rebuildCache","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"_issuer","type":"address"}],"name":"remainingIssuableSynths","outputs":[{"internalType":"uint256","name":"maxIssuable","type":"uint256"},{"internalType":"uint256","name":"alreadyIssued","type":"uint256"},{"internalType":"uint256","name":"totalSystemDebt","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"currencyKey","type":"bytes32"}],"name":"removeSynth","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32[]","name":"currencyKeys","type":"bytes32[]"}],"name":"removeSynths","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"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"}]Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000048914229dedd5a9922f44441ffccfc2cb7856ee9000000000000000000000000529c553ef2d0370279dc8abf19702b98b166d252
-----Decoded View---------------
Arg [0] : _owner (address): 0x48914229deDd5A9922f44441ffCCfC2Cb7856Ee9
Arg [1] : _resolver (address): 0x529C553eF2d0370279DC8AbF19702B98b166D252
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000048914229dedd5a9922f44441ffccfc2cb7856ee9
Arg [1] : 000000000000000000000000529c553ef2d0370279dc8abf19702b98b166d252
Library Used
SafeDecimalMath : 0x2ad7ccaac0eeb396c3a5fc2b73a885435688c0d5SystemSettingsLib : 0x343b5efcbf331957d3f4236eb16c338d7256f62dSignedSafeDecimalMath : 0xc7dcc0929881530d3386de51d9ffdd35b8009c6eExchangeSettlementLib : 0x3f60ffaef1ebd84e3c2d0c9c0e12388365d5df12
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.