411 lines
17 KiB
Nim
411 lines
17 KiB
Nim
# beacon_chain
|
|
# Copyright (c) 2018-2023 Status Research & Development GmbH
|
|
# Licensed and distributed under either of
|
|
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
|
|
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
|
|
# at your option. This file may not be copied, modified, or distributed except according to those terms.
|
|
|
|
{.push raises: [].}
|
|
|
|
## Signature production and verification for spec types - for every type of
|
|
## signature, there are 3 functions:
|
|
## * `compute_*_signing_root` - reduce message to the data that will be signed
|
|
## * `get_*_signature` - sign the signing root with a private key
|
|
## * `verify_*_signature` - verify a signature produced by `get_*_signature`
|
|
##
|
|
## See also `signatures_batch` for batch verification versions of these
|
|
## functions.
|
|
|
|
import
|
|
./datatypes/[phase0, altair, bellatrix], ./helpers, ./eth2_merkleization
|
|
|
|
from ./datatypes/capella import BLSToExecutionChange, SignedBLSToExecutionChange
|
|
|
|
export phase0, altair
|
|
|
|
template withTrust(sig: SomeSig, body: untyped): bool =
|
|
when sig is TrustedSig:
|
|
true
|
|
else:
|
|
body
|
|
|
|
func getDepositMessage(depositData: DepositData): DepositMessage =
|
|
DepositMessage(
|
|
pubkey: depositData.pubkey,
|
|
amount: depositData.amount,
|
|
withdrawal_credentials: depositData.withdrawal_credentials)
|
|
|
|
func compute_slot_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot
|
|
): Eth2Digest =
|
|
let
|
|
epoch = epoch(slot)
|
|
domain = get_domain(
|
|
fork, DOMAIN_SELECTION_PROOF, epoch, genesis_validators_root)
|
|
compute_signing_root(slot, domain)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#aggregation-selection
|
|
func get_slot_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_slot_signing_root(
|
|
fork, genesis_validators_root, slot)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
func compute_epoch_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, epoch: Epoch
|
|
): Eth2Digest =
|
|
let domain = get_domain(fork, DOMAIN_RANDAO, epoch, genesis_validators_root)
|
|
compute_signing_root(epoch, domain)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#randao-reveal
|
|
func get_epoch_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, epoch: Epoch,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_epoch_signing_root(
|
|
fork, genesis_validators_root, epoch)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_epoch_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, epoch: Epoch,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
withTrust(signature):
|
|
let signing_root = compute_epoch_signing_root(
|
|
fork, genesis_validators_root, epoch)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
func compute_block_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
|
|
blck: Eth2Digest | SomeForkyBeaconBlock | BeaconBlockHeader |
|
|
# https://github.com/ethereum/builder-specs/blob/v0.3.0/specs/bellatrix/builder.md#signing
|
|
bellatrix_mev.BlindedBeaconBlock | capella_mev.BlindedBeaconBlock):
|
|
Eth2Digest =
|
|
let
|
|
epoch = epoch(slot)
|
|
domain = get_domain(
|
|
fork, DOMAIN_BEACON_PROPOSER, epoch, genesis_validators_root)
|
|
compute_signing_root(blck, domain)
|
|
|
|
func compute_blob_signing_root(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
|
|
blob: BlobSidecar): Eth2Digest =
|
|
let
|
|
epoch = epoch(slot)
|
|
domain = get_domain(fork, DOMAIN_BLOB_SIDECAR, epoch,
|
|
genesis_validators_root)
|
|
compute_signing_root(blob, domain)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#signature
|
|
func get_block_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
|
|
root: Eth2Digest, privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_block_signing_root(
|
|
fork, genesis_validators_root, slot, root)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_block_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
|
|
blck: Eth2Digest | SomeForkyBeaconBlock | BeaconBlockHeader,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
withTrust(signature):
|
|
let
|
|
signing_root = compute_block_signing_root(
|
|
fork, genesis_validators_root, slot, blck)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
proc verify_blob_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
|
|
blobSidecar: BlobSidecar,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
withTrust(signature):
|
|
let
|
|
signing_root = compute_blob_signing_root(
|
|
fork, genesis_validators_root, slot, blobSidecar)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
func compute_aggregate_and_proof_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
aggregate_and_proof: AggregateAndProof): Eth2Digest =
|
|
let
|
|
epoch = epoch(aggregate_and_proof.aggregate.data.slot)
|
|
domain = get_domain(
|
|
fork, DOMAIN_AGGREGATE_AND_PROOF, epoch, genesis_validators_root)
|
|
compute_signing_root(aggregate_and_proof, domain)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#broadcast-aggregate
|
|
func get_aggregate_and_proof_signature*(fork: Fork, genesis_validators_root: Eth2Digest,
|
|
aggregate_and_proof: AggregateAndProof,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_aggregate_and_proof_signing_root(
|
|
fork, genesis_validators_root, aggregate_and_proof)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_aggregate_and_proof_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
aggregate_and_proof: AggregateAndProof,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
withTrust(signature):
|
|
let signing_root = compute_aggregate_and_proof_signing_root(
|
|
fork, genesis_validators_root, aggregate_and_proof)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
func compute_attestation_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
attestation_data: AttestationData): Eth2Digest =
|
|
let
|
|
epoch = attestation_data.target.epoch
|
|
domain = get_domain(
|
|
fork, DOMAIN_BEACON_ATTESTER, epoch, genesis_validators_root)
|
|
compute_signing_root(attestation_data, domain)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#aggregate-signature
|
|
func get_attestation_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
attestation_data: AttestationData,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_attestation_signing_root(
|
|
fork, genesis_validators_root, attestation_data)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_attestation_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
attestation_data: AttestationData,
|
|
pubkeys: auto, signature: SomeSig): bool =
|
|
withTrust(signature):
|
|
let signing_root = compute_attestation_signing_root(
|
|
fork, genesis_validators_root, attestation_data)
|
|
|
|
blsFastAggregateVerify(pubkeys, signing_root.data, signature)
|
|
|
|
func compute_deposit_signing_root(
|
|
version: Version,
|
|
deposit_message: DepositMessage): Eth2Digest =
|
|
let
|
|
# Fork-agnostic domain since deposits are valid across forks
|
|
domain = compute_domain(DOMAIN_DEPOSIT, version)
|
|
compute_signing_root(deposit_message, domain)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/beacon-chain.md#deposits
|
|
func get_deposit_signature*(preset: RuntimeConfig,
|
|
deposit: DepositData,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_deposit_signing_root(
|
|
preset.GENESIS_FORK_VERSION, deposit.getDepositMessage())
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
func get_deposit_signature*(message: DepositMessage, version: Version,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_deposit_signing_root(version, message)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_deposit_signature(preset: RuntimeConfig,
|
|
deposit: DepositData,
|
|
pubkey: CookedPubKey): bool =
|
|
let
|
|
deposit_message = deposit.getDepositMessage()
|
|
signing_root = compute_deposit_signing_root(
|
|
preset.GENESIS_FORK_VERSION, deposit_message)
|
|
|
|
blsVerify(pubkey, signing_root.data, deposit.signature)
|
|
|
|
proc verify_deposit_signature*(preset: RuntimeConfig,
|
|
deposit: DepositData): bool =
|
|
# Deposits come with compressed public keys; uncompressing them is expensive.
|
|
# `blsVerify` fills an internal cache when using `ValidatorPubKey`.
|
|
# To avoid filling this cache unnecessarily, uncompress explicitly here.
|
|
let pubkey = deposit.pubkey.load().valueOr: # Loading the pubkey is slow!
|
|
return false
|
|
verify_deposit_signature(preset, deposit, pubkey)
|
|
|
|
func compute_voluntary_exit_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
voluntary_exit: VoluntaryExit): Eth2Digest =
|
|
let
|
|
epoch = voluntary_exit.epoch
|
|
domain = get_domain(
|
|
fork, DOMAIN_VOLUNTARY_EXIT, epoch, genesis_validators_root)
|
|
compute_signing_root(voluntary_exit, domain)
|
|
|
|
func get_voluntary_exit_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
voluntary_exit: VoluntaryExit,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_voluntary_exit_signing_root(
|
|
fork, genesis_validators_root, voluntary_exit)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_voluntary_exit_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
voluntary_exit: VoluntaryExit,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
withTrust(signature):
|
|
let signing_root = compute_voluntary_exit_signing_root(
|
|
fork, genesis_validators_root, voluntary_exit)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/validator.md#prepare-sync-committee-message
|
|
func compute_sync_committee_message_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
slot: Slot, beacon_block_root: Eth2Digest): Eth2Digest =
|
|
let domain = get_domain(
|
|
fork, DOMAIN_SYNC_COMMITTEE, slot.epoch, genesis_validators_root)
|
|
compute_signing_root(beacon_block_root, domain)
|
|
|
|
func get_sync_committee_message_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
slot: Slot, beacon_block_root: Eth2Digest,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_sync_committee_message_signing_root(
|
|
fork, genesis_validators_root, slot, beacon_block_root)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_sync_committee_message_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
slot: Slot, beacon_block_root: Eth2Digest,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
let signing_root = compute_sync_committee_message_signing_root(
|
|
fork, genesis_validators_root, slot, beacon_block_root)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
proc verify_sync_committee_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
slot: Slot, beacon_block_root: Eth2Digest,
|
|
pubkeys: auto, signature: SomeSig): bool =
|
|
let signing_root = compute_sync_committee_message_signing_root(
|
|
fork, genesis_validators_root, slot, beacon_block_root)
|
|
|
|
blsFastAggregateVerify(pubkeys, signing_root.data, signature)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/validator.md#aggregation-selection
|
|
func compute_sync_committee_selection_proof_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
slot: Slot, subcommittee_index: SyncSubcommitteeIndex): Eth2Digest =
|
|
let
|
|
domain = get_domain(fork, DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF,
|
|
slot.epoch, genesis_validators_root)
|
|
signing_data = SyncAggregatorSelectionData(
|
|
slot: slot,
|
|
subcommittee_index: uint64 subcommittee_index)
|
|
compute_signing_root(signing_data, domain)
|
|
|
|
func get_sync_committee_selection_proof*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
slot: Slot, subcommittee_index: SyncSubcommitteeIndex,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_sync_committee_selection_proof_signing_root(
|
|
fork, genesis_validators_root, slot, subcommittee_index)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_sync_committee_selection_proof*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
slot: Slot, subcommittee_index: SyncSubcommitteeIndex,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
withTrust(signature):
|
|
let signing_root = compute_sync_committee_selection_proof_signing_root(
|
|
fork, genesis_validators_root, slot, subcommittee_index)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/validator.md#signature
|
|
func compute_contribution_and_proof_signing_root*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
msg: ContributionAndProof): Eth2Digest =
|
|
let domain = get_domain(fork, DOMAIN_CONTRIBUTION_AND_PROOF,
|
|
msg.contribution.slot.epoch,
|
|
genesis_validators_root)
|
|
compute_signing_root(msg, domain)
|
|
|
|
proc get_contribution_and_proof_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
msg: ContributionAndProof,
|
|
privkey: ValidatorPrivKey): CookedSig =
|
|
let signing_root = compute_contribution_and_proof_signing_root(
|
|
fork, genesis_validators_root, msg)
|
|
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/validator.md#aggregation-selection
|
|
func is_sync_committee_aggregator*(signature: ValidatorSig): bool =
|
|
let
|
|
signatureDigest = eth2digest(signature.blob)
|
|
modulo = max(1'u64, (SYNC_COMMITTEE_SIZE div SYNC_COMMITTEE_SUBNET_COUNT) div TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE)
|
|
bytes_to_uint64(signatureDigest.data.toOpenArray(0, 7)) mod modulo == 0
|
|
|
|
proc verify_contribution_and_proof_signature*(
|
|
fork: Fork, genesis_validators_root: Eth2Digest,
|
|
msg: ContributionAndProof,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
let signing_root = compute_contribution_and_proof_signing_root(
|
|
fork, genesis_validators_root, msg)
|
|
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
# https://github.com/ethereum/builder-specs/blob/v0.3.0/specs/bellatrix/builder.md#signing
|
|
func compute_builder_signing_root(
|
|
fork: Fork,
|
|
msg: bellatrix_mev.BuilderBid | capella_mev.BuilderBid |
|
|
ValidatorRegistrationV1): Eth2Digest =
|
|
# Uses genesis fork version regardless
|
|
doAssert fork.current_version == fork.previous_version
|
|
|
|
let domain = get_domain(
|
|
fork, DOMAIN_APPLICATION_BUILDER, GENESIS_EPOCH, ZERO_HASH)
|
|
compute_signing_root(msg, domain)
|
|
|
|
proc get_builder_signature*(
|
|
fork: Fork, msg: ValidatorRegistrationV1, privkey: ValidatorPrivKey):
|
|
CookedSig =
|
|
let signing_root = compute_builder_signing_root(fork, msg)
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_builder_signature*(
|
|
fork: Fork, msg: bellatrix_mev.BuilderBid | capella_mev.BuilderBid,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
let signing_root = compute_builder_signing_root(fork, msg)
|
|
blsVerify(pubkey, signing_root.data, signature)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#new-process_bls_to_execution_change
|
|
func compute_bls_to_execution_change_signing_root*(
|
|
genesisFork: Fork, genesis_validators_root: Eth2Digest,
|
|
msg: BLSToExecutionChange): Eth2Digest =
|
|
# So the epoch doesn't matter when calling get_domain
|
|
doAssert genesisFork.previous_version == genesisFork.current_version
|
|
|
|
# Fork-agnostic domain since address changes are valid across forks
|
|
let domain = get_domain(
|
|
genesisFork, DOMAIN_BLS_TO_EXECUTION_CHANGE, GENESIS_EPOCH,
|
|
genesis_validators_root)
|
|
compute_signing_root(msg, domain)
|
|
|
|
proc get_bls_to_execution_change_signature*(
|
|
genesisFork: Fork, genesis_validators_root: Eth2Digest,
|
|
msg: BLSToExecutionChange, privkey: ValidatorPrivKey):
|
|
CookedSig =
|
|
let signing_root = compute_bls_to_execution_change_signing_root(
|
|
genesisFork, genesis_validators_root, msg)
|
|
blsSign(privkey, signing_root.data)
|
|
|
|
proc verify_bls_to_execution_change_signature*(
|
|
genesisFork: Fork, genesis_validators_root: Eth2Digest,
|
|
msg: SignedBLSToExecutionChange,
|
|
pubkey: ValidatorPubKey | CookedPubKey, signature: SomeSig): bool =
|
|
let signing_root = compute_bls_to_execution_change_signing_root(
|
|
genesisFork, genesis_validators_root, msg.message)
|
|
blsVerify(pubkey, signing_root.data, signature)
|