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Data failures

What goes wrongEffect on quotesEffect on settlement
The market data feed has no rate for a pairQuotes for that pair are refusedNo rate is submitted; the contract waits
Operators disagree by more than 1%NoneSubmissions are cleared and operators submit again on their next run
Too few operators submit within 15 minutesNoneNo rate is agreed yet; the contract waits
The agreed rate is outside 0.5× to 2× the rate at purchaseNoneSettlement is refused; the contract waits for a valid rate
Daily price history is out of dateQuotes for that pair are refusedNone

What waiting means​

A contract that cannot settle stays Active. Its reserve stays locked, and the business cannot yet receive a payout. Nothing is lost: once a valid rate is agreed, the contract settles on it, and there is no deadline for the business to receive the payout.

Today, nobody can force a contract to settle on a rate the oracle has not agreed, including BlockFinaX.

In the next release (see Upgrades), a restricted fallback lets the protocol owner settle a contract the oracle could not settle, so its capital is not locked for ever. It opens only 7 days after expiry, only when no usable agreed rate exists, and the payout stays capped at the contract's reserve. Every use is recorded on chain.