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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| // Copyright 2022 MaidSafe.net limited. | ||
| // | ||
| // This SAFE Network Software is licensed to you under The General Public License (GPL), version 3. | ||
| // Unless required by applicable law or agreed to in writing, the SAFE Network Software distributed | ||
| // under the GPL Licence is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. Please review the Licences for the specific language governing | ||
| // permissions and limitations relating to use of the SAFE Network Software. | ||
|
|
||
| use crate::sdkg::Error as DkgError; | ||
| use thiserror::Error; | ||
|
|
||
| /// All the Dkg Errors | ||
| #[derive(Error, Debug)] | ||
| pub enum Error { | ||
| /// SDKG faults and errors | ||
| #[error("Dkg Error")] | ||
| Sdkg(#[from] DkgError), | ||
| /// Encoding | ||
| #[error("Failed to encode with bincode")] | ||
| Encoding(#[from] bincode::Error), | ||
| /// Invalid DkgState init input parameters | ||
| #[error("Failed to initialize DkgState: secret key is not in provided pub key set")] | ||
| NotInPubKeySet, | ||
| /// Invalid signature | ||
| #[error("Invalid signature")] | ||
| InvalidSignature, | ||
| /// Got vote from an unknown sender id | ||
| #[error("Unknown sender")] | ||
| UnknownSender, | ||
| /// Got a faulty vote, some nodes are dishonest or dysfunctional | ||
| #[error("Faulty vote {0}")] | ||
| FaultyVote(String), | ||
| /// Unexpectedly failed to generate secret key share | ||
| #[error("Unexpectedly failed to generate secret key share")] | ||
| FailedToGenerateSecretKeyShare, | ||
| } | ||
|
|
||
| pub type Result<T> = std::result::Result<T, Error>; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| // Copyright 2022 MaidSafe.net limited. | ||
| // | ||
| // This SAFE Network Software is licensed to you under The General Public License (GPL), version 3. | ||
| // Unless required by applicable law or agreed to in writing, the SAFE Network Software distributed | ||
| // under the GPL Licence is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. Please review the Licences for the specific language governing | ||
| // permissions and limitations relating to use of the SAFE Network Software. | ||
|
|
||
| use log::debug; | ||
| use std::collections::{BTreeMap, BTreeSet}; | ||
| use thiserror::Error; | ||
|
|
||
| use crate::vote::{DkgVote, IdAck, IdPart, NodeId}; | ||
|
|
||
| pub(crate) struct Knowledge { | ||
| pub parts: BTreeSet<IdPart>, | ||
| pub acks: BTreeMap<IdPart, BTreeSet<IdAck>>, | ||
| pub agreed_with_all_acks: BTreeSet<NodeId>, | ||
| } | ||
|
|
||
| #[derive(Error, Debug)] | ||
| pub(crate) enum KnowledgeFault { | ||
| #[error("Missing Parts to deal with Acks in received vote")] | ||
| MissingParts, | ||
| #[error("Parts in received vote differ from ours")] | ||
| IncompatibleParts, | ||
| #[error("Missing Acks to deal with AllAcks in received vote")] | ||
| MissingAcks, | ||
| #[error("Acks received in vote differ from ours")] | ||
| IncompatibleAcks, | ||
| } | ||
|
|
||
| impl Knowledge { | ||
| fn new() -> Self { | ||
| Knowledge { | ||
| parts: BTreeSet::new(), | ||
| acks: BTreeMap::new(), | ||
| agreed_with_all_acks: BTreeSet::new(), | ||
| } | ||
| } | ||
|
|
||
| pub fn from_votes(mut votes: Vec<(DkgVote, NodeId)>) -> Result<Self, KnowledgeFault> { | ||
| votes.sort(); | ||
| let mut knowledge = Knowledge::new(); | ||
| for (vote, voter_id) in votes { | ||
| knowledge.handle_vote(vote, voter_id)?; | ||
| } | ||
|
|
||
| Ok(knowledge) | ||
| } | ||
|
|
||
| pub fn got_all_acks(&self, participants_len: usize) -> bool { | ||
| self.acks.len() == participants_len | ||
| && self.acks.iter().any(|(_, a)| a.len() != participants_len) | ||
| } | ||
|
|
||
| fn handle_vote(&mut self, vote: DkgVote, id: NodeId) -> Result<(), KnowledgeFault> { | ||
| match vote { | ||
| DkgVote::SinglePart(part) => { | ||
| self.parts.insert((id, part)); | ||
| } | ||
| DkgVote::SingleAck(acked_parts) => { | ||
| let parts: BTreeSet<_> = acked_parts.keys().cloned().collect(); | ||
| if self.parts.len() < parts.len() { | ||
| return Err(KnowledgeFault::MissingParts); | ||
| } else if self.parts != parts { | ||
| debug!( | ||
| "IncompatibleParts: ours: {:?}, theirs: {:?}", | ||
| self.parts, parts | ||
| ); | ||
| return Err(KnowledgeFault::IncompatibleParts); | ||
| } | ||
| for (id_part, ack) in acked_parts { | ||
| if let Some(entry) = self.acks.get_mut(&id_part) { | ||
| entry.insert((id, ack)); | ||
| } else { | ||
| self.acks.insert(id_part, BTreeSet::from([(id, ack)])); | ||
| } | ||
| } | ||
| } | ||
| DkgVote::AllAcks(all_acks) => { | ||
| if !self.got_all_acks(self.parts.len()) { | ||
| return Err(KnowledgeFault::MissingAcks); | ||
| } else if all_acks != self.acks { | ||
| debug!( | ||
| "IncompatibleAcks: ours: {:?}, theirs: {:?}", | ||
| self.acks, all_acks | ||
| ); | ||
| return Err(KnowledgeFault::IncompatibleAcks); | ||
| } | ||
| self.agreed_with_all_acks.insert(id); | ||
| } | ||
| } | ||
| Ok(()) | ||
| } | ||
| } |
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