Support tracing API in gethclient

[s1na]

Currently there is no built-in support for tracing in the ethclient/gethclient. This involves adding 4 new methods to gethclient:

• TraceCall
• TraceTransaction
• TraceBlock
• TraceChain

[bnovil]

I'd like to do it. According to my understanding:

1. adding 4 methods to gethclient.Client
2. call methods in package tracers, for example ec.c.CallContext(ctx, &result, "debug_TraceTransaction")

Am I right?

[s1na]

@bnovil sounds great. You can also try using the types exposed in the eth/tracers package for the return values.

[krishpranav]

Hi, is this still open? can i work on this?

[s1na]

@krishpranav It is still open. We do need to pay some more attention to the API. I left a comment here: #28215 (comment).

I think we should also consider explicit API for pre-defined tracers, and I'm really thinking of the call tracer here. What I mean is additionally having the methods: TraceCallWithCallTracer and TraceTransactionWithCallTracer which will also return type-safe values.