Extrinsic RPC subscription events are capitalized

[kratico]

This is inconsistent with the Polkadot RPC

In Polkadot the ready, inBlock, finalized subscription event keys are not capitalized

Using chopsticks these event keys are Ready, InBlock, `Finalized

[xlc]

I will put this as "won't fix" for now until one of those happens:

• Identify compatibility issue with existing tools due to this
• OR some spec is created specifying what's the correct behaviour

[jsdw]

There is no spec for these old methods, but Substrate nodes and now Smoldot will return the non-capitalised event names, so shouldn't chopsticks align with these?

A compatibility issue at present is with Subxt, which understands the smoldot/substrate based camelCase event names and fails for the uppercase names emitted by chopsticks (Rust being more strict on these sorts of things). We can patch Subxt to support this inconsistency, but it would be better for no inconsistency to exist at all imo :)

Side note: there is a spec for the new RPC methods, and the new version of this subscription will also use camelCase names: https://paritytech.github.io/json-rpc-interface-spec/api/transaction_unstable_submitAndWatch.html

[xlc]

we can fix this if it is causing trouble for subxt