make start_aura bounds more lenient
@@ -155,10 +155,11 @@ pub fn start_aura<B, C, E, I, SO, Error>(
)
-> impl Future<Item=(),Error=()> where
B: Block,
- C: Authorities<B, Error=Error> + ChainHead<B>,
+ C: Authorities<B> + ChainHead<B>,
E: Environment<B, Error=Error>,
E::Proposer: Proposer<B, Error=Error>,
- I: BlockImport<B, Error=Error>,
+ I: BlockImport<B>,
+ Error: From<C::Error> + From<I::Error>,
SO: SyncOracle + Send + Clone,
DigestItemFor<B>: CompatibleDigestItem,
Error: ::std::error::Error + Send + 'static + From<::consensus_common::Error>,
