GNSTradingInteractions

Facet #7: Trading (user interactions)

constructor

constructor() public

initializeTrading

function initializeTrading(uint16 _marketOrdersTimeoutBlocks, address[] _usersByPassTriggerLink) external

Initializes the trading facet

Parameters

Name	Type	Description
_marketOrdersTimeoutBlocks	uint16	The number of blocks after which a market order is considered timed out
_usersByPassTriggerLink	address[]

updateMarketOrdersTimeoutBlocks

function updateMarketOrdersTimeoutBlocks(uint16 _valueBlocks) external

Updates marketOrdersTimeoutBlocks

Parameters

Name	Type	Description
_valueBlocks	uint16	blocks after which a market order times out

updateByPassTriggerLink

function updateByPassTriggerLink(address[] _users, bool[] _shouldByPass) external

Updates the users that can bypass the link cost of triggerOrder

Parameters

Name	Type	Description
_users	address[]	array of addresses that can bypass the link cost of triggerOrder
_shouldByPass	bool[]	whether each user should bypass the link cost

setTradingDelegate

function setTradingDelegate(address _delegate) external

_Sets delegate as the new delegate of caller (can call delegatedAction)

Parameters

Name	Type	Description
_delegate	address	the new delegate address

removeTradingDelegate

function removeTradingDelegate() external

Removes the delegate of caller (can't call delegatedAction)

delegatedTradingAction

function delegatedTradingAction(address _trader, bytes _callData) external returns (bytes)

_Caller executes a trading action on behalf of trader using delegatecall

Parameters

Name	Type	Description
_trader	address	the trader address to execute the trading action for
_callData	bytes	the data to be executed (open trade/close trade, etc.)

openTrade

function openTrade(struct ITradingStorage.Trade _trade, uint16 _maxSlippageP, address _referrer) external

Opens a new trade/limit order/stop order

Parameters

Name	Type	Description
_trade	ITradingStorage.Trade	the trade to be opened
_maxSlippageP	uint16	the maximum allowed slippage % when open the trade (1e3 precision)
_referrer	address	the address of the referrer (can only be set once for a trader)

openTradeNative

function openTradeNative(struct ITradingStorage.Trade _trade, uint16 _maxSlippageP, address _referrer) external payable

Wraps native token and opens a new trade/limit order/stop order

Parameters

Name	Type	Description
_trade	ITradingStorage.Trade	the trade to be opened
_maxSlippageP	uint16	the maximum allowed slippage % when open the trade (1e3 precision)
_referrer	address	the address of the referrer (can only be set once for a trader)

updateMaxClosingSlippageP

function updateMaxClosingSlippageP(uint32 _index, uint16 _maxSlippageP) external

Updates existing trade's max closing slippage % for caller

Parameters

Name	Type	Description
_index	uint32	index of trade
_maxSlippageP	uint16	new max closing slippage % (1e3 precision)

closeTradeMarket

function closeTradeMarket(uint32 _index, uint64 _expectedPrice) external

Closes an open trade (market order) for caller

Parameters

Name	Type	Description
_index	uint32	the index of the trade of caller
_expectedPrice	uint64	expected closing price, used to check max slippage (1e10 precision)

updateOpenOrder

function updateOpenOrder(uint32 _index, uint64 _triggerPrice, uint64 _tp, uint64 _sl, uint16 _maxSlippageP) external

Updates an existing limit/stop order for caller

Parameters

Name	Type	Description
_index	uint32	index of limit/stop order of caller
_triggerPrice	uint64	new trigger price of limit/stop order (1e10 precision)
_tp	uint64	new tp of limit/stop order (1e10 precision)
_sl	uint64	new sl of limit/stop order (1e10 precision)
_maxSlippageP	uint16	new max slippage % of limit/stop order (1e3 precision)

cancelOpenOrder

function cancelOpenOrder(uint32 _index) external

Cancels an open limit/stop order for caller

Parameters

Name	Type	Description
_index	uint32	index of limit/stop order of caller

updateTp

function updateTp(uint32 _index, uint64 _newTp) external

Updates the tp of an open trade for caller

Parameters

Name	Type	Description
_index	uint32	index of open trade of caller
_newTp	uint64	new tp of open trade (1e10 precision)

updateSl

function updateSl(uint32 _index, uint64 _newSl) external

Updates the sl of an open trade for caller

Parameters

Name	Type	Description
_index	uint32	index of open trade of caller
_newSl	uint64	new sl of open trade (1e10 precision)

updateLeverage

function updateLeverage(uint32 _index, uint24 _newLeverage) external

Update trade leverage

Parameters

Name	Type	Description
_index	uint32	index of trade
_newLeverage	uint24	new leverage (1e3)

increasePositionSize

function increasePositionSize(uint32 _index, uint120 _collateralDelta, uint24 _leverageDelta, uint64 _expectedPrice, uint16 _maxSlippageP) external

Increase trade position size

Parameters

Name	Type	Description
_index	uint32	index of trade
_collateralDelta	uint120	collateral to add (collateral precision)
_leverageDelta	uint24	partial trade leverage (1e3)
_expectedPrice	uint64	expected price of execution (1e10 precision)
_maxSlippageP	uint16	max slippage % (1e3)

decreasePositionSize

function decreasePositionSize(uint32 _index, uint120 _collateralDelta, uint24 _leverageDelta, uint64 _expectedPrice) external

Decrease trade position size

Parameters

Name	Type	Description
_index	uint32	index of trade
_collateralDelta	uint120	collateral to remove (collateral precision)
_leverageDelta	uint24	leverage to reduce by (1e3)
_expectedPrice	uint64	expected closing price, used to check max slippage (1e10 precision)

triggerOrder

function triggerOrder(uint256 _packed) external

Initiates a new trigger order (for tp/sl/liq/limit/stop orders)

Parameters

Name	Type	Description
_packed	uint256	the packed data of the trigger order (orderType, trader, index)

cancelOrderAfterTimeout

function cancelOrderAfterTimeout(uint32 _orderIndex) external

Safety function in case oracles don't answer in time, allows caller to cancel a pending order and if relevant claim back any stuck collateral Only allowed for MARKET_OPEN, MARKET_CLOSE, UPDATE_LEVERAGE, MARKET_PARTIAL_OPEN, and MARKET_PARTIAL_CLOSE orders

Parameters

Name	Type	Description
_orderIndex	uint32	the id of the pending order to cancel

getWrappedNativeToken

function getWrappedNativeToken() external view returns (address)

Returns the wrapped native token or address(0) if the current chain, or the wrapped token, is not supported.

isWrappedNativeToken

function isWrappedNativeToken(address _token) external view returns (bool)

Returns true if the token is the wrapped native token for the current chain, where supported.

Parameters

Name	Type	Description
_token	address	token address

getTradingDelegate

function getTradingDelegate(address _trader) external view returns (address)

Returns the address a trader delegates his trading actions to

Parameters

Name	Type	Description
_trader	address	address of the trader

getMarketOrdersTimeoutBlocks

function getMarketOrdersTimeoutBlocks() external view returns (uint16)

Returns the current marketOrdersTimeoutBlocks value

getByPassTriggerLink

function getByPassTriggerLink(address _user) external view returns (bool)

Returns whether a user bypasses trigger link costs

Parameters

Name	Type	Description
_user	address	address of the user