[Feature Request]: No need for both GRPC and Tendermint URLs

[ranlavanet]

Implementation ideas

Light node requires both grpc and tendermint URLs to be provided which is not necessary in cosmos.

github.com/cosmos/cosmos-sdk/client can be used by providing just the tendermint RPC endpoint.
Making it easier for the users to set up their client.

RunE: func(cmd *cobra.Command, args []string) error {
    clientCtx, err := client.GetClientTxContext(cmd)
    // any module query client
    <anymodule>.NewQueryClient(clientCtx)
    // as well as any tendermint rpc calls, for example status. 
    status, err := clientCtx.Client.Status(ctx)

Also, If you prefer to keeping the optionality to set up two endpoints, please allow the users to set up different URLs for both grpc and tendermint

I.E
Tendermint URL:
https://celestia.tendermint.rpc:443
gRPC URL:
celestia.grpc.rpc:443

currently the binary allows only port configuration while using the same IP address.

[Wondertan]

Unfortunately, that's not possible, as we still need the ability to fetch Block data, Commits, and Validator sets, and that's not accessible from GRPC.

We are working on moving necessary endpoints to GRPC to make it work with a single endpoint only, also avoiding the overhead JSON brings over the wire for big blocks

[ranlavanet]

Tendermint can make "GRPC" calls internally using abci_query.

[Wondertan]

These are only limited to App's state. It can't serve the data I listed above.

[Wondertan]

You can follow the development of the new required endpoints here: celestiaorg/celestia-core#1513

[omerlavanet]

@Wondertan using only the tendermint api that can fetch block data AND app state using the query abci_query which is routed to the app via tendermint, it is possible to fetch all of the data, the code example provided shows how you can use the client query context to bring the status (which is a tendermint api call), this can also be used to create a grpc query client, it wraps the grpc server under tendermint with abci_query

to showcase this is possible you can see any cosmos cli including the celestia cli run queries and txs on the app when you provide only --node of tendermintrpc

[Wondertan]

@omerlavanet, It is possible to do almost* everything with TM's JSON RPC only. Our goal, on the other hand, is to make everything work over GRPC as JSON brings noticeable overhead. This change will land in a not-so-distant future, effectively resolving the unification you requested.

[Wondertan]

JSON brings noticeable overhead

FYI, passing over 8mb blocks requires the Bridge Node to have at least 40GB of RAM, with 95% of allocations coming from JSON deserialization as per profiles.