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Refinements to VRF types (#14036)

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* Allow extra signing data

* Fix tests after renaming

* Rename VrfSecret/VrfVerifier to VrfSecret/VrfPublic

* Further encrapsulation of 'transcript' type to the sr25519 implementation

* Keystore sr25519 pre-output

* Leave additional custom input field hidden in the associated VrfInput type

* Fix test

* More ergonomic output_bytes

* Trigger pipeline

* Define a separated type for vrf signature data

* Fix docs

* Fix doc

* Remove annotation

* Directly use dleq_proove and dleq_verify in sr25519

* Trigger CI

* Remove cruft before merge
This commit is contained in:
Davide Galassi
2023-05-04 15:41:59 +02:00
committed by GitHub
parent 93165bc4d2
commit 3a90728de0
12 changed files with 384 additions and 138 deletions
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substrate/client/consensus/babe/src/authorship.rs
+7 -7
View File
@@ -24,7 +24,7 @@ use sc_consensus_epochs::Epoch as EpochT;
use sp_application_crypto::AppCrypto;
use sp_consensus_babe::{
digests::{PreDigest, PrimaryPreDigest, SecondaryPlainPreDigest, SecondaryVRFPreDigest},
make_transcript, AuthorityId, BabeAuthorityWeight, Randomness, Slot,
make_vrf_sign_data, AuthorityId, BabeAuthorityWeight, Randomness, Slot,
};
use sp_core::{
blake2_256,
@@ -148,9 +148,9 @@ fn claim_secondary_slot(
for (authority_id, authority_index) in keys {
if authority_id == expected_author {
let pre_digest = if author_secondary_vrf {
let transcript = make_transcript(randomness, slot, epoch_index);
let data = make_vrf_sign_data(randomness, slot, epoch_index);
let result =
keystore.sr25519_vrf_sign(AuthorityId::ID, authority_id.as_ref(), &transcript);
keystore.sr25519_vrf_sign(AuthorityId::ID, authority_id.as_ref(), &data);
if let Ok(Some(vrf_signature)) = result {
Some(PreDigest::SecondaryVRF(SecondaryVRFPreDigest {
slot,
@@ -239,18 +239,18 @@ fn claim_primary_slot(
epoch_index = epoch.clone_for_slot(slot).epoch_index;
}
let transcript = make_transcript(randomness, slot, epoch_index);
let data = make_vrf_sign_data(randomness, slot, epoch_index);
for (authority_id, authority_index) in keys {
let result = keystore.sr25519_vrf_sign(AuthorityId::ID, authority_id.as_ref(), &transcript);
let result = keystore.sr25519_vrf_sign(AuthorityId::ID, authority_id.as_ref(), &data);
if let Ok(Some(vrf_signature)) = result {
let threshold = calculate_primary_threshold(c, authorities, *authority_index);
let can_claim = authority_id
.as_inner_ref()
.make_bytes::<[u8; AUTHORING_SCORE_LENGTH]>(
.make_bytes::<AUTHORING_SCORE_LENGTH>(
AUTHORING_SCORE_VRF_CONTEXT,
&transcript,
&data.as_ref(),
&vrf_signature.output,
)
.map(|bytes| u128::from_le_bytes(bytes) < threshold)