- KVDB/StateDB
- Pass config parameters in a Config type instead of using many
arguments in constructor.
- Add new parameter `NoLast` which disables having an opened DB with a
checkpoint to the last batchNum for thread-safe reads. Last will be
disabled in the StateDB used by the TxSelector and BatchBuilder.
- Add new parameter `NoGapsCheck` which skips checking gaps in the list
of checkpoints and returning errors if there are gaps. Gaps check
will be disabled in the StateDB used by the TxSelector and
BatchBuilder, because we expect to have gaps when there are multiple
coordinators forging (slots not forged by our coordinator will leave
gaps).
- StateDB
- Update GetIdxByEthAddrBJJ to return ErrToIdxNotFound when idx not found, so can be checked at upper levels
- TxSelector
- rm CoordIdxsDB that is no longer needed (also related methods)
- add `getCoordIdx` method to get the Coordinator Idx for a given TokenID
- Update coordinator account creation related to new TokenIDs from L2Txs
- Reorganize GetL1L2TxSelection
- return CoordIdxs used in the selection
- Update go-merkletree version which avoids marshaling Siblings to json
with 'null' value in case of empty array
Introduce a constructor parameter for the StateDB called `keep`, which tells
how many checkpoints to keep. When doing a new checkpoint, if the number of
existing checkpoints exeeds `keep`, the oldest ones will be deleted.
Update usage of `*babyjub.PublicKey` to `babyjub.PublicKeyComp`
- when the key is not defined, internally is used `babyjub.EmptyBJJComp`, which is a `[32]byte` of zeroes of type `babyjub.PublicKeyComp`
- the API continues returning `nil` when the key is not defined
