While Bitcoin practically doesn't have long re-orgs, it is possible for a
single miner to build a long chain. Recently, a miner found 5 blocks in a row,
which would be enough to re-org a transaction Serai considered finalized.
Needed for the in-instructions pallet to verify in-instructions are
appropriately signed and continue developing that.
Fixes a bug in the validator-sets pallet, moves several items from the pallet
to primitives.
* Partial move to ff 0.13
It turns out the newly released k256 0.12 isn't on ff 0.13, preventing further
work at this time.
* Update all crates to work on ff 0.13
The provided curves still need to be expanded to fit the new API.
* Finish adding dalek-ff-group ff 0.13 constants
* Correct FieldElement::product definition
Also stops exporting macros.
* Test most new parts of ff 0.13
* Additionally test ff-group-tests with BLS12-381 and the pasta curves
We only tested curves from RustCrypto. Now we test a curve offered by zk-crypto,
the group behind ff/group, and the pasta curves, which is by Zcash (though
Zcash developers are also behind zk-crypto).
* Finish Ed448
Fully specifies all constants, passes all tests in ff-group-tests, and finishes moving to ff-0.13.
* Add RustCrypto/elliptic-curves to allowed git repos
Needed due to k256/p256 incorrectly defining product.
* Finish writing ff 0.13 tests
* Add additional comments to dalek
* Further comments
* Update ethereum-serai to ff 0.13
Updates to polkadot-v0.9.40, with a variety of dependency updates accordingly.
Substrate thankfully now uses k256 0.13, pathing the way for #256. We couldn't
upgrade to polkadot-v0.9.40 without this due to polkadot-v0.9.40 having
fundamental changes to syncing. While we could've updated tendermint, it's not
worth the continued development effort given its inability to work with
multiple validator sets.
Purges sc-tendermint. Keeps tendermint-machine for #163.
Closes#137, #148, #157, #171. #96 and #99 should be re-scoped/clarified. #134
and #159 also should be clarified. #169 is also no longer a priority since
we're only considering temporal deployments of tendermint. #170 also isn't
since we're looking at effectively sharded validator sets, so there should
be no singular large set needing high performance.
The original intent was to use inherent transactions to prevent needing to vote
on-chain, which would spam the chain with worthless votes. Inherent
transactions, and our Tendermint library, would use the BFT's processs voting
to also vote on all included transactions. This perfectly collapses integrity
voting creating *no additional on-chain costs*.
Unfortunately, this led to issues such as #6, along with questions of validator
scalability when all validators are expencted to participate in consensus (in
order to vote on if the included instructions are valid). This has been
summarized in #241.
With this change, we can remove Tendermint from Substrate. This greatly
decreases our complexity. While I'm unhappy with the amount of time spent on
it, just to reach this conclusion, thankfully tendermint-machine itself is
still usable for #163. This also has reached a tipping point recently as the
polkadot-v0.9.40 branch of substrate changed how syncing works, requiring
further changes to sc-tendermint. These have no value if we're just going to
get rid of it later, due to fundamental design issues, yet I would like to
keep Substrate updated.
This should be followed by moving back to GRANDPA, enabling closing most open
Tendermint issues.
Please note the current in-instructions-pallet does not actually verify the
included signature yet. It's marked TODO, despite this bing critical.
