mirror of
https://github.com/ethereum/solidity
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54 lines
1.6 KiB
Solidity
54 lines
1.6 KiB
Solidity
pragma solidity ^0.4.11;
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import "../Events/Event.sol";
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/// @title Categorical event contract - Categorical events resolve to an outcome from a set of outcomes
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/// @author Stefan George - <stefan@gnosis.pm>
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contract CategoricalEvent is Event {
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/*
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* Public functions
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*/
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/// @dev Contract constructor validates and sets basic event properties
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/// @param _collateralToken Tokens used as collateral in exchange for outcome tokens
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/// @param _oracle Oracle contract used to resolve the event
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/// @param outcomeCount Number of event outcomes
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constructor(
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Token _collateralToken,
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Oracle _oracle,
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uint8 outcomeCount
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)
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public
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Event(_collateralToken, _oracle, outcomeCount)
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{
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}
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/// @dev Exchanges sender's winning outcome tokens for collateral tokens
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/// @return Sender's winnings
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function redeemWinnings()
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public
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returns (uint winnings)
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{
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// Winning outcome has to be set
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require(isOutcomeSet);
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// Calculate winnings
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winnings = outcomeTokens[uint(outcome)].balanceOf(msg.sender);
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// Revoke tokens from winning outcome
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outcomeTokens[uint(outcome)].revoke(msg.sender, winnings);
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// Payout winnings
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require(collateralToken.transfer(msg.sender, winnings));
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emit WinningsRedemption(msg.sender, winnings);
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}
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/// @dev Calculates and returns event hash
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/// @return Event hash
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function getEventHash()
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public
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constant
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returns (bytes32)
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{
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return keccak256(abi.encodePacked(collateralToken, oracle, outcomeTokens.length));
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}
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}
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