ConditionalTokens

Variables

payoutNumerators

mapping(bytes32 => uint256[]) payoutNumerators

payoutDenominator

mapping(bytes32 => uint256) payoutDenominator

Events

ConditionPreparation

event ConditionPreparation(bytes32 conditionId, address oracle, bytes32 questionId, uint256 outcomeSlotCount)

Emitted upon the successful preparation of a condition.

Parameters

Name	Type	Description
conditionId	bytes32	The condition's ID. This ID may be derived from the other three parameters via keccak256(abi.encodePacked(oracle, questionId, outcomeSlotCount))
oracle	address	The account assigned to report the result for the prepared condition.
questionId	bytes32	An identifier for the question to be answered by the oracle.
outcomeSlotCount	uint256	The number of outcome slots which should be used for this condition. Must not exceed 256.

ConditionResolution

event ConditionResolution(bytes32 conditionId, address oracle, bytes32 questionId, uint256 outcomeSlotCount, uint256[] payoutNumerators)

PositionSplit

event PositionSplit(address stakeholder, contract IERC20 collateralToken, bytes32 parentCollectionId, bytes32 conditionId, uint256[] partition, uint256 amount)

Emitted when a position is successfully split.

PositionsMerge

event PositionsMerge(address stakeholder, contract IERC20 collateralToken, bytes32 parentCollectionId, bytes32 conditionId, uint256[] partition, uint256 amount)

Emitted when positions are successfully merged.

PayoutRedemption

event PayoutRedemption(address redeemer, contract IERC20 collateralToken, bytes32 parentCollectionId, bytes32 conditionId, uint256[] indexSets, uint256 payout)

Functions

prepareCondition

function prepareCondition(address oracle, bytes32 questionId, uint256 outcomeSlotCount) external

This function prepares a condition by initializing a payout vector associated with the condition.

Parameters

Name	Type	Description
oracle	address	The account assigned to report the result for the prepared condition.
questionId	bytes32	An identifier for the question to be answered by the oracle.
outcomeSlotCount	uint256	The number of outcome slots which should be used for this condition. Must not exceed 256.

reportPayouts

function reportPayouts(bytes32 questionId, uint256[] payouts) external

Called by the oracle for reporting results of conditions. Will set the payout vector for the condition with the ID keccak256(abi.encodePacked(oracle, questionId, outcomeSlotCount)), where oracle is the message sender, questionId is one of the parameters of this function, and outcomeSlotCount is the length of the payouts parameter, which contains the payoutNumerators for each outcome slot of the condition.

Parameters

Name	Type	Description
questionId	bytes32	The question ID the oracle is answering for
payouts	uint256[]	The oracle's answer

splitPosition

function splitPosition(contract IERC20 collateralToken, bytes32 parentCollectionId, bytes32 conditionId, uint256[] partition, uint256 amount) external

This function splits a position. If splitting from the collateral, this contract will attempt to transfer amount collateral from the message sender to itself. Otherwise, this contract will burn amount stake held by the message sender in the position being split worth of EIP 1155 tokens. Regardless, if successful, amount stake will be minted in the split target positions. If any of the transfers, mints, or burns fail, the transaction will revert. The transaction will also revert if the given partition is trivial, invalid, or refers to more slots than the condition is prepared with.

Parameters

Name	Type	Description
collateralToken	contract IERC20	The address of the positions' backing collateral token.
parentCollectionId	bytes32	The ID of the outcome collections common to the position being split and the split target positions. May be null, in which only the collateral is shared.
conditionId	bytes32	The ID of the condition to split on.
partition	uint256[]	An array of disjoint index sets representing a nontrivial partition of the outcome slots of the given condition. E.g. A|B and C but not A|B and B|C (is not disjoint). Each element's a number which, together with the condition, represents the outcome collection. E.g. 0b110 is A|B, 0b010 is B, etc.
amount	uint256	The amount of collateral or stake to split.

mergePositions

function mergePositions(contract IERC20 collateralToken, bytes32 parentCollectionId, bytes32 conditionId, uint256[] partition, uint256 amount) external

redeemPositions

function redeemPositions(contract IERC20 collateralToken, bytes32 parentCollectionId, bytes32 conditionId, uint256[] indexSets) external

getOutcomeSlotCount

function getOutcomeSlotCount(bytes32 conditionId) external view returns (uint256)

Gets the outcome slot count of a condition.

Parameters

Name	Type	Description
conditionId	bytes32	ID of the condition.

Return Values

Name	Type	Description
[0]	uint256	Number of outcome slots associated with a condition, or zero if condition has not been prepared yet.

getConditionId

function getConditionId(address oracle, bytes32 questionId, uint256 outcomeSlotCount) external pure returns (bytes32)

Constructs a condition ID from an oracle, a question ID, and the outcome slot count for the question.

Parameters

Name	Type	Description
oracle	address	The account assigned to report the result for the prepared condition.
questionId	bytes32	An identifier for the question to be answered by the oracle.
outcomeSlotCount	uint256	The number of outcome slots which should be used for this condition. Must not exceed 256.

getCollectionId

function getCollectionId(bytes32 parentCollectionId, bytes32 conditionId, uint256 indexSet) external view returns (bytes32)

Constructs an outcome collection ID from a parent collection and an outcome collection.

Parameters

Name	Type	Description
parentCollectionId	bytes32	Collection ID of the parent outcome collection, or bytes32(0) if there's no parent.
conditionId	bytes32	Condition ID of the outcome collection to combine with the parent outcome collection.
indexSet	uint256	Index set of the outcome collection to combine with the parent outcome collection.

getPositionId

function getPositionId(contract IERC20 collateralToken, bytes32 collectionId) external pure returns (uint256)

Constructs a position ID from a collateral token and an outcome collection. These IDs are used as the ERC-1155 ID for this contract.

Parameters

Name	Type	Description
collateralToken	contract IERC20	Collateral token which backs the position.
collectionId	bytes32	ID of the outcome collection associated with this position.