Cosmos SDK v0.42.10 "Stargate" Release Notes

This release includes a new AnteHandler that rejects redundant IBC transactions to save relayers fees. This is a backport of ibc-go #235.

v0.42.10 also includes multiple performance improvements, such as:

• improve ABCI performance under concurrent load via Tendermint v0.34.13,
• improve CacheKVStore datastructures / algorithms, to no longer take O(N^2) time when interleaving iterators and insertions.
• bump IAVL to v0.17.1 which includes performance improvements on a batch load.

We fixed the keyring to use pre-configured data for add-genesis-account command.

Finally, when using the client.Context, we modified ABCI queries to use abci.QueryRequest's Height field if it is non-zero, otherwise continue using client.Context's height. This is a minor client-breaking change for users of the client.Context.

See the Cosmos SDK v0.42.10 milestone on our issue tracker for the exhaustive list of all changes.