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pragma solidity ^0.4.11;
import "../Events/CategoricalEvent.sol";
import "../Events/ScalarEvent.sol";
/// @title Event factory contract - Allows creation of categorical and scalar events
/// @author Stefan George - <stefan@gnosis.pm>
contract EventFactory {
/*
* Events
*/
event CategoricalEventCreation(address indexed creator, CategoricalEvent categoricalEvent, Token collateralToken, Oracle oracle, uint8 outcomeCount);
event ScalarEventCreation(address indexed creator, ScalarEvent scalarEvent, Token collateralToken, Oracle oracle, int lowerBound, int upperBound);
/*
* Storage
*/
mapping (bytes32 => CategoricalEvent) public categoricalEvents;
mapping (bytes32 => ScalarEvent) public scalarEvents;
/*
* Public functions
*/
/// @dev Creates a new categorical event and adds it to the event mapping
/// @param collateralToken Tokens used as collateral in exchange for outcome tokens
/// @param oracle Oracle contract used to resolve the event
/// @param outcomeCount Number of event outcomes
/// @return Event contract
function createCategoricalEvent(
Token collateralToken,
Oracle oracle,
uint8 outcomeCount
)
public
returns (CategoricalEvent eventContract)
{
bytes32 eventHash = keccak256(abi.encodePacked(collateralToken, oracle, outcomeCount));
// Event should not exist yet
require(address(categoricalEvents[eventHash]) == address(0));
// Create event
eventContract = new CategoricalEvent(
collateralToken,
oracle,
outcomeCount
);
categoricalEvents[eventHash] = eventContract;
CategoricalEventCreation(msg.sender, eventContract, collateralToken, oracle, outcomeCount);
}
/// @dev Creates a new scalar event and adds it to the event mapping
/// @param collateralToken Tokens used as collateral in exchange for outcome tokens
/// @param oracle Oracle contract used to resolve the event
/// @param lowerBound Lower bound for event outcome
/// @param upperBound Lower bound for event outcome
/// @return Event contract
function createScalarEvent(
Token collateralToken,
Oracle oracle,
int lowerBound,
int upperBound
)
public
returns (ScalarEvent eventContract)
{
bytes32 eventHash = keccak256(abi.encodePacked(collateralToken, oracle, lowerBound, upperBound));
// Event should not exist yet
require(address(scalarEvents[eventHash]) == address(0));
// Create event
eventContract = new ScalarEvent(
collateralToken,
oracle,
lowerBound,
upperBound
);
scalarEvents[eventHash] = eventContract;
ScalarEventCreation(msg.sender, eventContract, collateralToken, oracle, lowerBound, upperBound);
}
}
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