import tables, json, streams, chronos, chronicles, spec/[datatypes, crypto, digest, signatures, helpers], beacon_node_types, json_serialization/std/[sets, net], validator_slashing_protection, eth/db/[kvstore, kvstore_sqlite3] func init*(T: type ValidatorPool, slashingProtectionDB: SlashingProtectionDB): T = ## Initialize the validator pool and the slashing protection service ## `genesis_validator_root` is used as an unique ID for the ## blockchain ## `backend` is the KeyValue Store backend result.validators = initTable[ValidatorPubKey, AttachedValidator]() result.slashingProtection = slashingProtectionDB template count*(pool: ValidatorPool): int = pool.validators.len proc addLocalValidator*(pool: var ValidatorPool, pubKey: ValidatorPubKey, privKey: ValidatorPrivKey) = let v = AttachedValidator(pubKey: pubKey, kind: inProcess, privKey: privKey) pool.validators[pubKey] = v notice "Local validator attached", pubKey, validator = shortLog(v) proc addRemoteValidator*(pool: var ValidatorPool, pubKey: ValidatorPubKey, v: AttachedValidator) = pool.validators[pubKey] = v notice "Remote validator attached", pubKey, validator = shortLog(v) proc getValidator*(pool: ValidatorPool, validatorKey: ValidatorPubKey): AttachedValidator = pool.validators.getOrDefault(validatorKey.initPubKey) proc signWithRemoteValidator(v: AttachedValidator, data: Eth2Digest): Future[ValidatorSig] {.async.} = v.connection.inStream.writeLine(v.connection.pubKeyStr, " ", $data) v.connection.inStream.flush() var line = newStringOfCap(120).TaintedString discard v.connection.outStream.readLine(line) result = ValidatorSig.fromHex(line).get() # TODO this is an ugly hack to fake a delay and subsequent async reordering # for the purpose of testing the external validator delay - to be # replaced by something more sensible await sleepAsync(chronos.milliseconds(1)) # TODO: Honest validator - https://github.com/ethereum/eth2.0-specs/blob/v0.12.3/specs/phase0/validator.md proc signBlockProposal*(v: AttachedValidator, fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot, blockRoot: Eth2Digest): Future[ValidatorSig] {.async.} = if v.kind == inProcess: result = get_block_signature( fork, genesis_validators_root, slot, blockRoot, v.privKey) else: let root = compute_block_root(fork, genesis_validators_root, slot, blockRoot) result = await signWithRemoteValidator(v, root) proc signAttestation*(v: AttachedValidator, attestation: AttestationData, fork: Fork, genesis_validators_root: Eth2Digest): Future[ValidatorSig] {.async.} = if v.kind == inProcess: result = get_attestation_signature( fork, genesis_validators_root, attestation, v.privKey) else: let root = compute_attestation_root(fork, genesis_validators_root, attestation) result = await signWithRemoteValidator(v, root) proc produceAndSignAttestation*(validator: AttachedValidator, attestationData: AttestationData, committeeLen: int, indexInCommittee: int, fork: Fork, genesis_validators_root: Eth2Digest): Future[Attestation] {.async.} = let validatorSignature = await validator.signAttestation(attestationData, fork, genesis_validators_root) var aggregationBits = CommitteeValidatorsBits.init(committeeLen) aggregationBits.setBit indexInCommittee return Attestation(data: attestationData, signature: validatorSignature, aggregation_bits: aggregationBits) proc signAggregateAndProof*(v: AttachedValidator, aggregate_and_proof: AggregateAndProof, fork: Fork, genesis_validators_root: Eth2Digest): Future[ValidatorSig] {.async.} = if v.kind == inProcess: result = get_aggregate_and_proof_signature( fork, genesis_validators_root, aggregate_and_proof, v.privKey) else: let root = compute_aggregate_and_proof_root( fork, genesis_validators_root, aggregate_and_proof) result = await signWithRemoteValidator(v, root) # https://github.com/ethereum/eth2.0-specs/blob/v0.12.3/specs/phase0/validator.md#randao-reveal func genRandaoReveal*(k: ValidatorPrivKey, fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot): ValidatorSig = get_epoch_signature( fork, genesis_validators_root, slot.compute_epoch_at_slot, k) proc genRandaoReveal*(v: AttachedValidator, fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot): Future[ValidatorSig] {.async.} = if v.kind == inProcess: return genRandaoReveal(v.privKey, fork, genesis_validators_root, slot) else: let root = compute_epoch_root( fork, genesis_validators_root, slot.compute_epoch_at_slot) result = await signWithRemoteValidator(v, root) proc getSlotSig*(v: AttachedValidator, fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot ): Future[ValidatorSig] {.async.} = if v.kind == inProcess: result = get_slot_signature( fork, genesis_validators_root, slot, v.privKey) else: let root = compute_slot_root(fork, genesis_validators_root, slot) result = await signWithRemoteValidator(v, root)