OracleAncillaryInterface
Financial contract facing Oracle interface.
Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
requestPrice(bytes32 identifier, uint256 time, bytes ancillaryData) public
Enqueues a request (if a request isn’t already present) for the given identifier, time pair.
Time must be in the past and the identifier must be supported.
Parameters:
-
identifier: uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested. -
ancillaryData: arbitrary data appended to a price request to give the voters more info from the caller. -
time: unix timestamp for the price request.
hasPrice(bytes32 identifier, uint256 time, bytes ancillaryData) → bool public
Whether the price for identifier and time is available.
Time must be in the past and the identifier must be supported.
Parameters:
-
identifier: uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested. -
time: unix timestamp for the price request. -
ancillaryData: arbitrary data appended to a price request to give the voters more info from the caller.
getPrice(bytes32 identifier, uint256 time, bytes ancillaryData) → int256 public
Gets the price for identifier and time if it has already been requested and resolved.
If the price is not available, the method reverts.
Parameters:
-
identifier: uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested. -
time: unix timestamp for the price request. -
ancillaryData: arbitrary data appended to a price request to give the voters more info from the caller.