import ".."/spec/forks import common, api import chronicles logScope: service = "block_service" proc publishBlock(vc: ValidatorClientRef, currentSlot, slot: Slot, validator: AttachedValidator) {.async.} = let genesisRoot = vc.beaconGenesis.genesis_validators_root graffiti = if vc.config.graffiti.isSome(): vc.config.graffiti.get() else: defaultGraffitiBytes() fork = vc.fork.get() debug "Publishing block", validator = shortLog(validator), delay = vc.getDelay(slot.block_deadline()), wall_slot = currentSlot, genesis_root = genesisRoot, graffiti = graffiti, fork = fork, slot = slot, wall_slot = currentSlot try: let randaoReveal = block: let res = await validator.genRandaoReveal(fork, genesisRoot, slot) if res.isErr(): error "Unable to generate randao reveal usint remote signer", validator = shortLog(validator), error_msg = res.error() return res.get() let beaconBlock = try: await vc.produceBlockV2(slot, randaoReveal, graffiti) except ValidatorApiError: error "Unable to retrieve block data", slot = slot, wall_slot = currentSlot, validator = shortLog(validator) return except CatchableError as exc: error "An unexpected error occurred while getting block data", err_name = exc.name, err_msg = exc.msg return let blockRoot = withBlck(beaconBlock): hash_tree_root(blck) # TODO: signing_root is recomputed in signBlockProposal just after let signing_root = compute_block_signing_root(fork, genesisRoot, slot, blockRoot) let notSlashable = vc.attachedValidators .slashingProtection .registerBlock(ValidatorIndex(beaconBlock.proposer_index), validator.pubkey, slot, signing_root) if notSlashable.isOk(): let signature = block: let res = await validator.signBlockProposal(fork, genesisRoot, slot, blockRoot, beaconBlock) if res.isErr(): error "Unable to sign block proposal using remote signer", validator = shortLog(validator), error_msg = res.error() return res.get() debug "Sending block", blockRoot = shortLog(blockRoot), blck = shortLog(beaconBlock), signature = shortLog(signature), validator = shortLog(validator) let res = try: let signedBlock = ForkedSignedBeaconBlock.init(beaconBlock, blockRoot, signature) await vc.publishBlock(signedBlock) except ValidatorApiError: error "Unable to publish block", blockRoot = shortLog(blockRoot), blck = shortLog(beaconBlock), signature = shortLog(signature), validator = shortLog(validator), validator_index = validator.index.get(), wall_slot = currentSlot return except CatchableError as exc: error "An unexpected error occurred while publishing block", err_name = exc.name, err_msg = exc.msg return if res: notice "Block published", blockRoot = shortLog(blockRoot), blck = shortLog(beaconBlock), signature = shortLog(signature), validator = shortLog(validator) else: warn "Block was not accepted by beacon node", blockRoot = shortLog(blockRoot), blck = shortLog(beaconBlock), signature = shortLog(signature), validator = shortLog(validator), wall_slot = currentSlot else: warn "Slashing protection activated for block proposal", blockRoot = shortLog(blockRoot), blck = shortLog(beaconBlock), validator = shortLog(validator), wall_slot = currentSlot, existingProposal = notSlashable.error except CatchableError as exc: error "Unexpected error happens while proposing block", error_name = exc.name, error_msg = exc.msg proc proposeBlock(vc: ValidatorClientRef, slot: Slot, proposerKey: ValidatorPubkey) {.async.} = let (inFuture, timeToSleep) = vc.beaconClock.fromNow(slot) try: if inFuture: debug "Proposing block", timeIn = timeToSleep, validator = shortLog(proposerKey) await sleepAsync(timeToSleep) else: debug "Proposing block", timeIn = 0.seconds, validator = shortLog(proposerKey) let sres = vc.getCurrentSlot() if sres.isSome(): let currentSlot = sres.get() let validator = block: let res = vc.getValidator(proposerKey) if res.isNone(): return res.get() await vc.publishBlock(currentSlot, slot, validator) except CancelledError: debug "Proposing task was cancelled", slot = slot, validator = shortLog(proposerKey) proc spawnProposalTask(vc: ValidatorClientRef, duty: RestProposerDuty): ProposerTask = let future = proposeBlock(vc, duty.slot, duty.pubkey) ProposerTask(future: future, duty: duty) proc contains(data: openArray[RestProposerDuty], task: ProposerTask): bool = for item in data: if (item.pubkey == task.duty.pubkey) and (item.slot == task.duty.slot): return true false proc contains(data: openArray[ProposerTask], duty: RestProposerDuty): bool = for item in data: if (item.duty.pubkey == duty.pubkey) and (item.duty.slot == duty.slot): return true false proc checkDuty(duty: RestProposerDuty, epoch: Epoch, slot: Slot): bool = let lastSlot = start_slot(epoch + 1'u64) if duty.slot >= slot: if duty.slot < lastSlot: true else: warn "Block proposal duty is in the far future, ignoring", duty_slot = duty.slot, validator = shortLog(duty.pubkey), wall_slot = slot, last_slot_in_epoch = (lastSlot - 1'u64) false else: warn "Block proposal duty is in the past, ignoring", duty_slot = duty.slot, validator = shortLog(duty.pubkey), wall_slot = slot false proc addOrReplaceProposers*(vc: ValidatorClientRef, epoch: Epoch, dependentRoot: Eth2Digest, duties: openArray[RestProposerDuty]) = let default = ProposedData(epoch: Epoch(0xFFFF_FFFF_FFFF_FFFF'u64)) let sres = vc.getCurrentSlot() if sres.isSome(): let currentSlot = sres.get() epochDuties = vc.proposers.getOrDefault(epoch, default) if not(epochDuties.isDefault()): if epochDuties.dependentRoot != dependentRoot: warn "Proposer duties re-organization", duties_count = len(duties), wall_slot = currentSlot, epoch = epoch, prior_dependent_root = epochDuties.dependentRoot, dependent_root = dependentRoot, wall_slot = currentSlot let tasks = block: var res: seq[ProposerTask] var hashset = initHashSet[Slot]() for task in epochDuties.duties: if task notin duties: # Task is no more relevant, so cancel it. debug "Cancelling running proposal duty task", slot = task.duty.slot, validator = shortLog(task.duty.pubkey) task.future.cancel() else: # If task is already running for proper slot, we keep it alive. debug "Keep running previous proposal duty task", slot = task.duty.slot, validator = shortLog(task.duty.pubkey) res.add(task) for duty in duties: if duty notin res: debug "New proposal duty received", slot = duty.slot, validator = shortLog(duty.pubkey) if checkDuty(duty, epoch, currentSlot): let task = vc.spawnProposalTask(duty) if duty.slot in hashset: error "Multiple block proposers for this slot, " & "producing blocks for all proposers", slot = duty.slot else: hashset.incl(duty.slot) res.add(task) res vc.proposers[epoch] = ProposedData.init(epoch, dependentRoot, tasks) else: debug "New block proposal duties received", dependent_root = dependentRoot, duties_count = len(duties), wall_slot = currentSlot, epoch = epoch # Spawn new proposer tasks and modify proposers map. let tasks = block: var hashset = initHashSet[Slot]() var res: seq[ProposerTask] for duty in duties: debug "New proposal duty received", slot = duty.slot, validator = shortLog(duty.pubkey) if checkDuty(duty, epoch, currentSlot): let task = vc.spawnProposalTask(duty) if duty.slot in hashset: error "Multiple block proposers for this slot, " & "producing blocks for all proposers", slot = duty.slot else: hashset.incl(duty.slot) res.add(task) res vc.proposers[epoch] = ProposedData.init(epoch, dependentRoot, tasks) proc waitForBlockPublished*(vc: ValidatorClientRef, slot: Slot) {.async.} = ## This procedure will wait for all the block proposal tasks to be finished at ## slot ``slot`` let pendingTasks = block: var res: seq[Future[void]] let epochDuties = vc.proposers.getOrDefault(slot.epoch()) for task in epochDuties.duties: if task.duty.slot == slot: if not(task.future.finished()): res.add(task.future) res if len(pendingTasks) > 0: await allFutures(pendingTasks)