147 lines
4.5 KiB
Nim
147 lines
4.5 KiB
Nim
import std/options
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import pkg/questionable/results
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import ../../clock
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import ../../logutils
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import ../../utils/exceptions
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import ../statemachine
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import ../salesagent
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import ../salescontext
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import ./errorhandling
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import ./cancelled
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import ./failed
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import ./errored
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import ./payout
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logScope:
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topics = "marketplace sales proving"
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type
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SlotNotFilledError* = object of CatchableError
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SaleProving* = ref object of ErrorHandlingState
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loop: Future[void]
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method prove*(
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state: SaleProving,
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slot: Slot,
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challenge: ProofChallenge,
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onProve: OnProve,
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market: Market,
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currentPeriod: Period
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) {.base, async.} =
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try:
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without proof =? (await onProve(slot, challenge)), err:
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error "Failed to generate proof", error = err.msg
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# In this state, there's nothing we can do except try again next time.
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return
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debug "Submitting proof", currentPeriod = currentPeriod, slotId = slot.id
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await market.submitProof(slot.id, proof)
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except CatchableError as e:
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error "Submitting proof failed", msg = e.msgDetail
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proc proveLoop(
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state: SaleProving,
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market: Market,
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clock: Clock,
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request: StorageRequest,
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slotIndex: UInt256,
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onProve: OnProve
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) {.async.} =
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let slot = Slot(request: request, slotIndex: slotIndex)
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let slotId = slot.id
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logScope:
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period = currentPeriod
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requestId = request.id
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slotIndex
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slotId = slot.id
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proc getCurrentPeriod(): Future[Period] {.async.} =
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let periodicity = await market.periodicity()
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return periodicity.periodOf(clock.now().u256)
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proc waitUntilPeriod(period: Period) {.async.} =
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let periodicity = await market.periodicity()
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# Ensure that we're past the period boundary by waiting an additional second
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await clock.waitUntil(periodicity.periodStart(period).truncate(int64) + 1)
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while true:
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let currentPeriod = await getCurrentPeriod()
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let slotState = await market.slotState(slot.id)
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case slotState
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of SlotState.Filled:
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debug "Proving for new period", period = currentPeriod
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if (await market.isProofRequired(slotId)) or (await market.willProofBeRequired(slotId)):
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let challenge = await market.getChallenge(slotId)
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debug "Proof is required", period = currentPeriod, challenge = challenge
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await state.prove(slot, challenge, onProve, market, currentPeriod)
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of SlotState.Cancelled:
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debug "Slot reached cancelled state"
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# do nothing, let onCancelled callback take care of it
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of SlotState.Failed:
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debug "Slot reached failed state"
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# do nothing, let onFailed callback take care of it
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of SlotState.Finished:
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debug "Slot reached finished state", period = currentPeriod
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return # exit the loop
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else:
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let message = "Slot is not in Filled state, but in state: " & $slotState
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raise newException(SlotNotFilledError, message)
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debug "waiting until next period"
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await waitUntilPeriod(currentPeriod + 1)
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method `$`*(state: SaleProving): string = "SaleProving"
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method onCancelled*(state: SaleProving, request: StorageRequest): ?State =
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# state.loop cancellation happens automatically when run is cancelled due to
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# state change
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return some State(SaleCancelled())
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method onFailed*(state: SaleProving, request: StorageRequest): ?State =
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# state.loop cancellation happens automatically when run is cancelled due to
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# state change
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return some State(SaleFailed())
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method run*(state: SaleProving, machine: Machine): Future[?State] {.async.} =
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let data = SalesAgent(machine).data
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let context = SalesAgent(machine).context
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without request =? data.request:
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raiseAssert "no sale request"
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without onProve =? context.onProve:
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raiseAssert "onProve callback not set"
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without market =? context.market:
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raiseAssert("market not set")
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without clock =? context.clock:
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raiseAssert("clock not set")
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debug "Start proving", requestId = data.requestId, slotIndex = data.slotIndex
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try:
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let loop = state.proveLoop(market, clock, request, data.slotIndex, onProve)
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state.loop = loop
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await loop
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except CancelledError:
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discard
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except CatchableError as e:
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error "Proving failed", msg = e.msg
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return some State(SaleErrored(error: e))
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finally:
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# Cleanup of the proving loop
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debug "Stopping proving.", requestId = data.requestId, slotIndex = data.slotIndex
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if not state.loop.isNil:
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if not state.loop.finished:
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try:
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await state.loop.cancelAndWait()
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except CatchableError as e:
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error "Error during cancellation of proving loop", msg = e.msg
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state.loop = nil
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return some State(SalePayout())
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