StandardMarketWithPriceLogger¶

contract StandardMarketWithPriceLogger is StandardMarket, StandardMarketWithPriceLoggerData¶

function buy(uint8 outcomeTokenIndex, uint outcomeTokenCount, uint maxCost)¶ public returns (uint cost) ¶

Allows to buy outcome tokens from market maker

Parameters:	outcomeTokenIndex – Index of the outcome token to buy outcomeTokenCount – Amount of outcome tokens to buy maxCost – The maximum cost in collateral tokens to pay for outcome tokens
Return:	Cost in collateral tokens

function sell(uint8 outcomeTokenIndex, uint outcomeTokenCount, uint minProfit)¶ public returns (uint profit) ¶

Allows to sell outcome tokens to market maker

Parameters:	outcomeTokenIndex – Index of the outcome token to sell outcomeTokenCount – Amount of outcome tokens to sell minProfit – The minimum profit in collateral tokens to earn for outcome tokens
Return:	Profit in collateral tokens

function shortSell(uint8 outcomeTokenIndex, uint outcomeTokenCount, uint minProfit)¶ public returns (uint cost) ¶

Buys all outcomes, then sells all shares of selected outcome which were bought, keeping shares of all other outcome tokens.

Parameters:	outcomeTokenIndex – Index of the outcome token to short sell outcomeTokenCount – Amount of outcome tokens to short sell minProfit – The minimum profit in collateral tokens to earn for short sold outcome tokens
Return:	Cost to short sell outcome in collateral tokens

function trade(int[] memory outcomeTokenAmounts, int collateralLimit)¶ public returns (int netCost) ¶

Allows to trade outcome tokens with market maker

Parameters:	outcomeTokenAmounts – Amounts of outcome tokens to trade collateralLimit – The maximum cost or minimum profit in collateral tokens
Return:	Cost/profit in collateral tokens

function close()¶ public ¶: Allows market creator to close the markets by transferring all remaining outcome tokens to the creator

function getAvgPrice()¶ public view returns (uint) ¶

Calculates average price for long tokens based on price integral

Return:	Average price for long tokens over time

function logPriceBefore()¶ private ¶: Adds price integral since the last trade to the total price integral

function logPriceAfter()¶ private ¶: Updates last trade timestamp and price