{ "contractName": "FutarchyOracleData", "abi": [ { "constant": true, "inputs": [], "name": "LONG", "outputs": [ { "name": "", "type": "uint8" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "winningMarketIndex", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "uint256" } ], "name": "markets", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "categoricalEvent", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "isSet", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": 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event FutarchyClosing();\n event OutcomeAssignment(uint winningMarketIndex);\n\n /*\n * Constants\n */\n uint8 public constant LONG = 1;\n\n /*\n * Storage\n */\n address creator;\n StandardMarketWithPriceLogger[] public markets;\n CategoricalEvent public categoricalEvent;\n uint public tradingPeriod;\n uint public winningMarketIndex;\n bool public isSet;\n\n /*\n * Modifiers\n */\n modifier isCreator() {\n // Only creator is allowed to proceed\n require(msg.sender == creator);\n _;\n }\n}\n\ncontract FutarchyOracleProxy is Proxy, FutarchyOracleData {\n\n /// @dev Constructor creates events and markets for futarchy oracle\n /// @param _creator Oracle creator\n /// @param eventFactory Event factory contract\n /// @param collateralToken Tokens used as collateral in exchange for outcome tokens\n /// @param oracle Oracle contract used to resolve the event\n /// @param outcomeCount Number of event outcomes\n /// @param lowerBound Lower bound for event outcome\n /// @param upperBound Lower bound for event outcome\n /// @param marketFactory Market factory contract\n /// @param marketMaker Market maker contract\n /// @param fee Market fee\n /// @param _tradingPeriod Trading period before decision can be determined\n /// @param startDate Start date for price logging\n constructor(\n address proxied,\n address _creator,\n EventFactory eventFactory,\n ERC20 collateralToken,\n Oracle oracle,\n uint8 outcomeCount,\n int lowerBound,\n int upperBound,\n StandardMarketWithPriceLoggerFactory marketFactory,\n MarketMaker marketMaker,\n uint24 fee,\n uint _tradingPeriod,\n uint startDate\n )\n Proxy(proxied)\n public\n {\n // trading period is at least a second\n require(_tradingPeriod > 0);\n // Create decision event\n categoricalEvent = eventFactory.createCategoricalEvent(collateralToken, Oracle(address(this)), outcomeCount);\n // Create outcome events\n for (uint8 i = 0; i < categoricalEvent.getOutcomeCount(); i++) {\n ScalarEvent scalarEvent = eventFactory.createScalarEvent(\n categoricalEvent.outcomeTokens(i),\n oracle,\n lowerBound,\n upperBound\n );\n markets.push(marketFactory.createMarket(scalarEvent, marketMaker, fee, startDate));\n }\n creator = _creator;\n tradingPeriod = _tradingPeriod;\n }\n}\n\n/// @title Futarchy oracle contract - Allows to create an oracle based on market behaviour\n/// @author Stefan George - \ncontract FutarchyOracle is Proxied, Oracle, FutarchyOracleData {\n using SafeMath for *;\n\n /*\n * Public functions\n */\n /// @dev Funds all markets with equal amount of funding\n /// @param funding Amount of funding\n function fund(uint funding)\n public\n isCreator\n {\n // Buy all outcomes\n require( categoricalEvent.collateralToken().transferFrom(creator, address(this), funding)\n && categoricalEvent.collateralToken().approve(address(categoricalEvent), funding));\n categoricalEvent.buyAllOutcomes(funding);\n // Fund each market with outcome tokens from categorical event\n for (uint8 i = 0; i < markets.length; i++) {\n Market market = markets[i];\n // Approve funding for market\n require(market.eventContract().collateralToken().approve(address(market), funding));\n market.fund(funding);\n }\n emit FutarchyFunding(funding);\n }\n\n /// @dev Closes market for winning outcome and redeems winnings and sends all collateral tokens to creator\n function close()\n public\n isCreator\n {\n // Winning outcome has to be set\n Market market = markets[uint(getOutcome())];\n require(categoricalEvent.isOutcomeSet() && market.eventContract().isOutcomeSet());\n // Close market and transfer all outcome tokens from winning outcome to this contract\n market.close();\n market.eventContract().redeemWinnings();\n market.withdrawFees();\n // Redeem collateral token for winning outcome tokens and transfer collateral tokens to creator\n categoricalEvent.redeemWinnings();\n require(categoricalEvent.collateralToken().transfer(creator, categoricalEvent.collateralToken().balanceOf(address(this))));\n emit FutarchyClosing();\n }\n\n /// @dev Allows to set the oracle outcome based on the market with largest long position\n function setOutcome()\n public\n {\n // Outcome is not set yet and trading period is over\n require(!isSet && markets[0].startDate() + tradingPeriod < now);\n // Find market with highest marginal price for long outcome tokens\n uint highestAvgPrice = markets[0].getAvgPrice();\n uint highestIndex = 0;\n for (uint8 i = 1; i < markets.length; i++) {\n uint avgPrice = markets[i].getAvgPrice();\n if (avgPrice > highestAvgPrice) {\n highestAvgPrice = avgPrice;\n highestIndex = i;\n }\n }\n winningMarketIndex = highestIndex;\n isSet = true;\n emit OutcomeAssignment(winningMarketIndex);\n }\n\n /// @dev Returns if winning outcome is set\n /// @return Is outcome set?\n function isOutcomeSet()\n public\n view\n returns (bool)\n {\n return isSet;\n }\n\n /// @dev Returns winning outcome\n /// @return Outcome\n function getOutcome()\n public\n view\n returns (int)\n {\n return int(winningMarketIndex);\n }\n}\n", 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4220, "name": "Market", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2296, "src": "4201:6:18", "typeDescriptions": { "typeIdentifier": "t_contract$_Market_$2296", "typeString": "contract Market" } }, "value": null, "visibility": "internal" } ], "id": 4228, "initialValue": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 4222, "name": "markets", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4003, "src": "4217:7:18", "typeDescriptions": { "typeIdentifier": "t_array$_t_contract$_StandardMarketWithPriceLogger_$3549_$dyn_storage", "typeString": "contract StandardMarketWithPriceLogger[] storage ref" } }, "id": 4227, "indexExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 4224, "name": "getOutcome", "nodeType": "Identifier", "overloadedDeclarations": [ 4379 ], "referencedDeclaration": 4379, "src": "4230:10:18", "typeDescriptions": { 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