@gnosis.pm/pm-contracts

{ "contractName": "FutarchyOracleProxy", "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": "masterCopy", "outputs": [ { "name": "", "type": "address" } ], "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": "tradingPeriod", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "inputs": [ { "name": "proxied", "type": "address" }, { "name": "_creator", "type": "address" }, { "name": "eventFactory", "type": "address" }, { "name": "collateralToken", "type": "address" }, { "name": "oracle", "type": "address" }, { "name": "outcomeCount", "type": "uint8" }, { "name": "lowerBound", "type": "int256" }, { "name": "upperBound", "type": "int256" }, { "name": "marketFactory", "type": "address" }, { "name": "marketMaker", "type": "address" }, { "name": "fee", "type": "uint24" }, { "name": "_tradingPeriod", "type": "uint256" }, { "name": "startDate", "type": "uint256" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "payable": true, "stateMutability": "payable", "type": "fallback" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "funding", "type": "uint256" } ], "name": "FutarchyFunding", "type": "event" }, { "anonymous": false, "inputs": [], "name": "FutarchyClosing", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "winningMarketIndex", "type": "uint256" } ], "name": "OutcomeAssignment", "type": "event" } ], "metadata": 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"source": "pragma solidity ^0.5.0;\nimport \"../Oracles/Oracle.sol\";\nimport \"../Events/EventFactory.sol\";\nimport \"../Markets/StandardMarketWithPriceLoggerFactory.sol\";\nimport \"@gnosis.pm/util-contracts/contracts/Proxy.sol\";\n\n\ncontract FutarchyOracleData {\n\n /*\n * Events\n */\n event FutarchyFunding(uint funding);\n 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 - <stefan@gnosis.pm>\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", "sourcePath": "/home/alan/src/github.com/gnosis/pm-contracts/contracts/Oracles/FutarchyOracle.sol", "ast": { "absolutePath": "/home/alan/src/github.com/gnosis/pm-contracts/contracts/Oracles/FutarchyOracle.sol", "exportedSymbols": { "FutarchyOracle": [ 4380 ], "FutarchyOracleData": [ 4023 ], "FutarchyOracleProxy": [ 4127 ] }, "id": 4381, "nodeType": "SourceUnit", "nodes": [ { "id": 3981, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:18" }, { "absolutePath": "/home/alan/src/github.com/gnosis/pm-contracts/contracts/Oracles/Oracle.sol", "file": "../Oracles/Oracle.sol", "id": 3982, 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