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* Move logic for evaluating if a cosign should occur to its own file Cleans it up and makes it more robust. * Have expected_next_batch return an error instead of retrying While convenient to offer an error-free implementation, it potentially caused very long lived lock acquisitions in handle_processor_message. * Unify and clean DkgConfirmer and DkgRemoval Does so via adding a new file for the common code, SigningProtocol. Modifies from_cache to return the preprocess with the machine, as there's no reason not to. Also removes an unused Result around the type. Clarifies the security around deterministic nonces, removing them for saved-to-disk cached preprocesses. The cached preprocesses are encrypted as the DB is not a proper secret store. Moves arguments always present in the protocol from function arguments into the struct itself. Removes the horribly ugly code in DkgRemoval, fixing multiple issues present with it which would cause it to fail on use. * Set SeraiBlockNumber in cosign.rs as it's used by the cosigning protocol * Remove unnecessary Clone from lambdas in coordinator * Remove the EventDb from Tributary scanner We used per-Transaction DB TXNs so on error, we don't have to rescan the entire block yet only the rest of it. We prevented scanning multiple transactions by tracking which we already had. This is over-engineered and not worth it. * Implement borsh for HasEvents, removing the manual encoding * Merge DkgConfirmer and DkgRemoval into signing_protocol.rs Fixes a bug in DkgConfirmer which would cause it to improperly handle indexes if any validator had multiple key shares. * Strictly type DataSpecification's Label * Correct threshold_i_map_to_keys_and_musig_i_map It didn't include the participant's own index and accordingly was offset. * Create TributaryBlockHandler This struct contains all variables prior passed to handle_block and stops them from being passed around again and again. This also ensures fatal_slash is only called while handling a block, as needed as it expects to operate under perfect consensus. * Inline accumulate, store confirmation nonces with shares Inlining accumulate makes sense due to the amount of data accumulate needed to be passed. Storing confirmation nonces with shares ensures that both are available or neither. Prior, one could be yet the other may not have been (requiring an assert in runtime to ensure we didn't bungle it somehow). * Create helper functions for handling DkgRemoval/SubstrateSign/Sign Tributary TXs * Move Label into SignData All of our transactions which use SignData end up with the same common usage pattern for Label, justifying this. Removes 3 transactions, explicitly de-duplicating their handlers. * Remove CurrentlyCompletingKeyPair for the non-contextual DkgKeyPair * Remove the manual read/write for TributarySpec for borsh This struct doesn't have any optimizations booned by the manual impl. Using borsh reduces our scope. * Use temporary variables to further minimize LoC in tributary handler * Remove usage of tuples for non-trivial Tributary transactions * Remove serde from dkg serde could be used to deserialize intenrally inconsistent objects which could lead to panics or faults. The BorshDeserialize derives have been replaced with a manual implementation which won't produce inconsistent objects. * Abstract Future generics using new trait definitions in coordinator * Move published_signed_transaction to tributary/mod.rs to reduce the size of main.rs * Split coordinator/src/tributary/mod.rs into spec.rs and transaction.rs |
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