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r4bbit
bb55bd3ccd
Adds the CreateOraclePriceAccount instruction to the TWAP oracle program. The instruction initialises a canonical OraclePriceAccount PDA for a given price source and time window. The account starts with price = 0 and timestamp = 0 — a deliberately invalid sentinel state that signals "not yet published". Consumers are expected to reject any account whose timestamp is zero or stale, so the transient invalid state requires no special on-chain enforcement. - PDA mirrors PriceObservations: derived from (oracle_program_id, price_source_id, window_duration) with a distinct seed constant, so each (source, window) pair maps to a distinct oracle price account that cannot collide with its corresponding observations account. - source_id is not a parameter: it is always set to price_source.account_id. Accepting it as a free parameter would allow callers to register a price account that claims to represent a source it does not control. Deriving it from the authorized price source account closes that vector entirely. - Authorization follows the same model as CreatePriceObservations: is_authorized = true on the price source proves the caller controls it; the PDA check ensures the supplied oracle price account address is the one derived from that specific source and window. - price = 0 / timestamp = 0 is the correct initial state: coupling account creation to first publication would require the observation account to already hold a full window of ticks, blocking registration for up to the window duration. Consumers must validate oracle prices regardless, so the zero sentinel falls naturally out of the staleness check they already own. Closes #129