Contribute tracer work at go-ethereum

[ziogaschr]

Based on our initial talk with geth team and specifically with Sina, we will/can contribute with tracing related work directly at geth (upstram).

Notes: https://hackmd.io/MCN_nh-VQJWYdy1Pl-On6A?insert=true

• Flat call tracer #14
• Find testnet to be used for tracing compatibility testing among clients #17
• core/vm: set tracer-observable value of a delegatecall to match parent value ethereum/go-ethereum#26632
• eth/tracers: add native flatCallTracer (aka parity style tracer) ethereum/go-ethereum#26377