IPriceAggregatorUtils

Interface for GNSPriceAggregator facet (inherits types and also contains functions, events, and custom errors)

initializePriceAggregator

function initializePriceAggregator(address _linkToken, contract IChainlinkFeed _linkUsdPriceFeed, uint24 _twapInterval, uint8 _minAnswers, address[] _oracles, bytes32[2] _jobIds, uint8[] _collateralIndices, struct IPriceAggregator.LiquidityPoolInput[] _gnsCollateralLiquidityPools, contract IChainlinkFeed[] _collateralUsdPriceFeeds) external

Initializes price aggregator facet

Parameters

Name	Type	Description
_linkToken	address	LINK token address
_linkUsdPriceFeed	contract IChainlinkFeed	LINK/USD price feed address
_twapInterval	uint24	TWAP interval (seconds)
_minAnswers	uint8	answers count at which a trade is executed with median
_oracles	address[]	chainlink oracle addresses
_jobIds	bytes32[2]	chainlink job ids (market/lookback)
_collateralIndices	uint8[]	collateral indices
_gnsCollateralLiquidityPools	IPriceAggregator.LiquidityPoolInput[]	corresponding GNS/collateral liquidity pool values
_collateralUsdPriceFeeds	contract IChainlinkFeed[]	corresponding collateral/USD chainlink price feeds

updateLinkUsdPriceFeed

function updateLinkUsdPriceFeed(contract IChainlinkFeed _value) external

Updates LINK/USD chainlink price feed

Parameters

Name	Type	Description
_value	contract IChainlinkFeed	new value

updateCollateralUsdPriceFeed

function updateCollateralUsdPriceFeed(uint8 _collateralIndex, contract IChainlinkFeed _value) external

Updates collateral/USD chainlink price feed

Parameters

Name	Type	Description
_collateralIndex	uint8	collateral index
_value	contract IChainlinkFeed	new value

updateCollateralGnsLiquidityPool

function updateCollateralGnsLiquidityPool(uint8 _collateralIndex, struct IPriceAggregator.LiquidityPoolInput _liquidityPoolInput) external

Updates collateral/GNS liquidity pool

Parameters

Name	Type	Description
_collateralIndex	uint8	collateral index
_liquidityPoolInput	IPriceAggregator.LiquidityPoolInput	new values

updateTwapInterval

function updateTwapInterval(uint24 _twapInterval) external

Updates TWAP interval

Parameters

Name	Type	Description
_twapInterval	uint24	new value (seconds)

updateMinAnswers

function updateMinAnswers(uint8 _value) external

Updates minimum answers count

Parameters

Name	Type	Description
_value	uint8	new value

addOracle

function addOracle(address _a) external

Adds an oracle

Parameters

Name	Type	Description
_a	address	new value

replaceOracle

function replaceOracle(uint256 _index, address _a) external

Replaces an oracle

Parameters

Name	Type	Description
_index	uint256	oracle index
_a	address	new value

removeOracle

function removeOracle(uint256 _index) external

Removes an oracle

Parameters

Name	Type	Description
_index	uint256	oracle index

setMarketJobId

function setMarketJobId(bytes32 _jobId) external

Updates market job id

Parameters

Name	Type	Description
_jobId	bytes32	new value

setLimitJobId

function setLimitJobId(bytes32 _jobId) external

Updates lookback job id

Parameters

Name	Type	Description
_jobId	bytes32	new value

getPrice

function getPrice(uint8 _collateralIndex, uint16 _pairIndex, struct ITradingStorage.Id _tradeId, struct ITradingStorage.Id _orderId, enum ITradingStorage.PendingOrderType _orderType, uint256 _positionSizeCollateral, uint256 _fromBlock) external

Requests price from oracles

Parameters

Name	Type	Description
_collateralIndex	uint8	collateral index
_pairIndex	uint16	pair index
_tradeId	ITradingStorage.Id	trade id
_orderId	ITradingStorage.Id	order id
_orderType	enum ITradingStorage.PendingOrderType	order type
_positionSizeCollateral	uint256	position size (collateral precision)
_fromBlock	uint256	block number from which to start fetching prices (for lookbacks)

fulfill

function fulfill(bytes32 _requestId, uint256 _priceData) external

Fulfills price request, called by chainlink oracles

Parameters

Name	Type	Description
_requestId	bytes32	request id
_priceData	uint256	price data

claimBackLink

function claimBackLink() external

Claims back LINK tokens, called by gov fund

getLinkFee

function getLinkFee(uint8 _collateralIndex, address _trader, uint16 _pairIndex, uint256 _positionSizeCollateral) external view returns (uint256)

Returns LINK fee for price request

Parameters

Name	Type	Description
_collateralIndex	uint8	collateral index
_trader	address	trader address
_pairIndex	uint16	pair index
_positionSizeCollateral	uint256	position size in collateral tokens (collateral precision)

getCollateralPriceUsd

function getCollateralPriceUsd(uint8 _collateralIndex) external view returns (uint256)

Returns collateral/USD price

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral

getUsdNormalizedValue

function getUsdNormalizedValue(uint8 _collateralIndex, uint256 _collateralValue) external view returns (uint256)

Returns USD normalized value from collateral value

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral
_collateralValue	uint256	collateral value (collateral precision)

getCollateralFromUsdNormalizedValue

function getCollateralFromUsdNormalizedValue(uint8 _collateralIndex, uint256 _normalizedValue) external view returns (uint256)

Returns collateral value (collateral precision) from USD normalized value

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral
_normalizedValue	uint256	normalized value (1e18 USD)

getGnsPriceUsd

function getGnsPriceUsd(uint8 _collateralIndex) external view returns (uint256)

Returns GNS/USD price based on GNS/collateral price

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral

getGnsPriceUsd

function getGnsPriceUsd(uint8 _collateralIndex, uint256 _gnsPriceCollateral) external view returns (uint256)

Returns GNS/USD price based on GNS/collateral price

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral
_gnsPriceCollateral	uint256	GNS/collateral price (1e10)

getGnsPriceCollateralIndex

function getGnsPriceCollateralIndex(uint8 _collateralIndex) external view returns (uint256)

Returns GNS/collateral price

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral

getGnsPriceCollateralAddress

function getGnsPriceCollateralAddress(address _collateral) external view returns (uint256)

Returns GNS/collateral price

Parameters

Name	Type	Description
_collateral	address	address of the collateral

getLinkUsdPriceFeed

function getLinkUsdPriceFeed() external view returns (contract IChainlinkFeed)

Returns the link/usd price feed address

getTwapInterval

function getTwapInterval() external view returns (uint24)

Returns the twap interval in seconds

getMinAnswers

function getMinAnswers() external view returns (uint8)

Returns the minimum answers to execute an order and take the median

getMarketJobId

function getMarketJobId() external view returns (bytes32)

Returns the market job id

getLimitJobId

function getLimitJobId() external view returns (bytes32)

Returns the limit job id

getOracle

function getOracle(uint256 _index) external view returns (address)

Returns a specific oracle

Parameters

Name	Type	Description
_index	uint256	index of the oracle

getOracles

function getOracles() external view returns (address[])

Returns all oracles

getCollateralGnsLiquidityPool

function getCollateralGnsLiquidityPool(uint8 _collateralIndex) external view returns (struct IPriceAggregator.LiquidityPoolInfo)

Returns collateral/gns liquidity pool info

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral

getCollateralUsdPriceFeed

function getCollateralUsdPriceFeed(uint8 _collateralIndex) external view returns (contract IChainlinkFeed)

Returns collateral/usd chainlink price feed

Parameters

Name	Type	Description
_collateralIndex	uint8	index of collateral

getPriceAggregatorOrder

function getPriceAggregatorOrder(bytes32 _requestId) external view returns (struct IPriceAggregator.Order)

Returns order data

Parameters

Name	Type	Description
_requestId	bytes32	index of collateral

getPriceAggregatorOrderAnswers

function getPriceAggregatorOrderAnswers(struct ITradingStorage.Id _orderId) external view returns (struct IPriceAggregator.OrderAnswer[])

Returns order data

Parameters

Name	Type	Description
_orderId	ITradingStorage.Id	order id

getChainlinkToken

function getChainlinkToken() external view returns (address)

Returns chainlink token address

getRequestCount

function getRequestCount() external view returns (uint256)

Returns requestCount (used by ChainlinkClientUtils)

getPendingRequest

function getPendingRequest(bytes32 _id) external view returns (address)

Returns pendingRequests mapping entry (used by ChainlinkClientUtils)

LinkUsdPriceFeedUpdated

event LinkUsdPriceFeedUpdated(address value)

Emitted when LINK/USD price feed is updated

Parameters

Name	Type	Description
value	address	new value

CollateralUsdPriceFeedUpdated

event CollateralUsdPriceFeedUpdated(uint8 collateralIndex, address value)

Emitted when collateral/USD price feed is updated

Parameters

Name	Type	Description
collateralIndex	uint8	collateral index
value	address	new value

CollateralGnsLiquidityPoolUpdated

event CollateralGnsLiquidityPoolUpdated(uint8 collateralIndex, struct IPriceAggregator.LiquidityPoolInfo newValue)

Emitted when collateral/GNS Uniswap V3 pool is updated

Parameters

Name	Type	Description
collateralIndex	uint8	collateral index
newValue	struct IPriceAggregator.LiquidityPoolInfo	new value

TwapIntervalUpdated

event TwapIntervalUpdated(uint32 newValue)

Emitted when TWAP interval is updated

Parameters

Name	Type	Description
newValue	uint32	new value

MinAnswersUpdated

event MinAnswersUpdated(uint8 value)

Emitted when minimum answers count is updated

Parameters

Name	Type	Description
value	uint8	new value

OracleAdded

event OracleAdded(uint256 index, address value)

Emitted when an oracle is added

Parameters

Name	Type	Description
index	uint256	new oracle index
value	address	value

OracleReplaced

event OracleReplaced(uint256 index, address oldOracle, address newOracle)

Emitted when an oracle is replaced

Parameters

Name	Type	Description
index	uint256	oracle index
oldOracle	address	old value
newOracle	address	new value

OracleRemoved

event OracleRemoved(uint256 index, address oldOracle)

Emitted when an oracle is removed

Parameters

Name	Type	Description
index	uint256	oracle index
oldOracle	address	old value

JobIdUpdated

event JobIdUpdated(uint256 index, bytes32 jobId)

Emitted when market job id is updated

Parameters

Name	Type	Description
index	uint256	index
jobId	bytes32	new value

LinkRequestCreated

event LinkRequestCreated(struct Chainlink.Request request)

Emitted when a chainlink request is created

Parameters

Name	Type	Description
request	struct Chainlink.Request	link request details

PriceRequested

event PriceRequested(uint8 collateralIndex, uint256 pairIndex, struct ITradingStorage.Id tradeId, struct ITradingStorage.Id pendingOrderId, enum ITradingStorage.PendingOrderType orderType, uint256 fromBlock, bool isLookback, bytes32 job, uint256 linkFeePerNode, uint256 nodesCount)

Emitted when a price is requested to the oracles

Parameters

Name	Type	Description
collateralIndex	uint8	collateral index
pairIndex	uint256	trading pair index
tradeId	struct ITradingStorage.Id	trader id
pendingOrderId	struct ITradingStorage.Id	pending order id
orderType	enum ITradingStorage.PendingOrderType	order type (market open/market close/limit open/stop open/etc.)
fromBlock	uint256	block number from which to start fetching prices (for lookbacks)
isLookback	bool	true if lookback
job	bytes32	chainlink job id (market/lookback)
linkFeePerNode	uint256	link fee distributed per node (1e18 precision)
nodesCount	uint256	amount of nodes to fetch prices from

TradingCallbackExecuted

event TradingCallbackExecuted(struct ITradingCallbacks.AggregatorAnswer a, enum ITradingStorage.PendingOrderType orderType)

Emitted when a trading callback is called from the price aggregator

Parameters

Name	Type	Description
a	struct ITradingCallbacks.AggregatorAnswer	aggregator answer data
orderType	enum ITradingStorage.PendingOrderType	order type

PriceReceived

event PriceReceived(struct ITradingStorage.Id orderId, uint16 pairIndex, bytes32 request, uint256 priceData, bool isLookback, bool usedInMedian)

Emitted when a price is received from the oracles

Parameters

Name	Type	Description
orderId	struct ITradingStorage.Id	pending order id
pairIndex	uint16	trading pair index
request	bytes32	chainlink request id
priceData	uint256	OrderAnswer compressed into uint256
isLookback	bool	true if lookback
usedInMedian	bool	false if order already executed because min answers count was already reached

LinkClaimedBack

event LinkClaimedBack(uint256 amountLink)

Emitted when LINK tokens are claimed back by gov fund

Parameters

Name	Type	Description
amountLink	uint256	amount of LINK tokens claimed back

TransferAndCallToOracleFailed

error TransferAndCallToOracleFailed()

SourceNotOracleOfRequest

error SourceNotOracleOfRequest()

RequestAlreadyPending

error RequestAlreadyPending()

OracleAlreadyListed

error OracleAlreadyListed()

InvalidCandle

error InvalidCandle()

WrongCollateralUsdDecimals

error WrongCollateralUsdDecimals()

InvalidPoolType

error InvalidPoolType()