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Fixes and improvements for PoC-1 Testnet (#143)

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* Fix initialisations and add a test.

* Fix test.

* Fix overflow bug.

* Minor refactoring and fixes.

* Fix vote threshold.

* Add note.

* Fixes for latest rust and the readme.

* Better readme.

* An extra validator for PoC-1

* Update README.

* PoC-1 bootnodes.

* don't return async::notready for messages without scheduling wakeup

* Fix endowed account

* give polkadot control over round proposer based on random seed

* address grumbles.
This commit is contained in:
Gav Wood
2018-05-07 15:25:47 +02:00
committed by GitHub
parent 2232da2d53
commit 5d9481140c
27 changed files with 307 additions and 59 deletions
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substrate/substrate/bft/src/lib.rs
+11 -15
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@@ -133,11 +133,16 @@ pub trait Proposer {
/// Create a proposal.
fn propose(&self) -> Self::Create;
/// Evaluate proposal. True means valid.
// TODO: change this to a future.
fn evaluate(&self, proposal: &Block) -> Self::Evaluate;
/// Import witnessed misbehavior.
fn import_misbehavior(&self, misbehavior: Vec<(AuthorityId, Misbehavior)>);
/// Determine the proposer for a given round. This should be a deterministic function
/// with consistent results across all authorities.
fn round_proposer(&self, round_number: usize, authorities: &[AuthorityId]) -> AuthorityId;
}
/// Block import trait.
@@ -189,20 +194,7 @@ impl<P: Proposer> generic::Context for BftInstance<P> {
}
fn round_proposer(&self, round: usize) -> AuthorityId {
use primitives::hashing::blake2_256;
// repeat blake2_256 on parent hash round + 1 times.
// use as index into authorities vec.
// TODO: parent hash is really insecure as a randomness beacon as
// the prior can easily influence the block hash.
let hashed = (0..round + 1).fold(self.parent_hash.0, |a, _| {
blake2_256(&a[..])
});
let index = u32::decode(&mut &hashed[..])
.expect("there are more than 4 bytes in a 32 byte hash; qed");
self.authorities[(index as usize) % self.authorities.len()]
self.proposer.round_proposer(round, &self.authorities[..])
}
fn proposal_valid(&self, proposal: &Block) -> Self::EvaluateProposal {
@@ -649,6 +641,10 @@ mod tests {
}
fn import_misbehavior(&self, _misbehavior: Vec<(AuthorityId, Misbehavior)>) {}
fn round_proposer(&self, round_number: usize, authorities: &[AuthorityId]) -> AuthorityId {
authorities[round_number % authorities.len()].clone()
}
}
fn make_service(client: FakeClient)