epic: feat: Make it possible to broadcast transactions with RPC instead of GRPC

[Unique-Divine]

Currently, the Transaction type parses protobuf messages and gets the raw tx bytes needed to broadcast transactions over gRPC. The Cosmos-SDK v0.47 upgrade seems to have large breaking behavior for gRPC, thus it may be wise for us to add a tx broadcasting client for JSON RPC.

This would be similar to the one used by the Tendermint34Client and SigningStargateClient in cosmjs.

Full List of RPC Methods

Goal: Implement and test each RPC method from Tendermint v0.37

Tx - transaction broadcast APi

These broadcasting RPC methods are the top priority because most of the other queries have a corresponding GRPC query that works on Nibiru v0.21

• "broadcast_tx_sync"
• "broadcast_tx_async"
• "broadcast_tx_commit"
• "check_tx"

ABCI - [A]pplication [B]lock[C]hain [I]nterface

• "abci_info"
• "abci_query"

Node Info

• "block"
• "block_by_hash"
• "block_results"
• "block_search"
• "blockchain"
• "broadcast_evidence"
• "commit"
• "consensus_params"
• "consensus_state"
• "dump_consensus_state"
• "genesis"
• "header"
• "header_by_hash"
• "health"
• "net_info"
• "num_unconfirmed_txs"
• "status"
• "tx"
• "tx_search"
• "unconfirmed_txs"
• "validators"

Related

• cosmos/cosmjs (repo)
• bug: Common GRPC InactiveRpcError on v0.21 chain #241