Lotus Eth JSON-RPC API: use Go tags to annotate methods with aliases

[raulk]

See

lotus/node/rpc.go

Line 76 in 9a29841

// TODO: use reflect to automatically register all the eth aliases

.

Currently we manually assign JSON-RPC operation aliases to every Eth method. Instead, specify method alises through annotations of some kind (we seem to use comments, yuck, and Go tags are only supported on structs).

Apparently some codegen magic does turn these comments into struct tags, but those are implementation details.

[maciejwitowski]

@raulk nice to have, but not as important as testing, right? Would like to remove it from M2.1 scope.

[jennijuju]

https://github.com/filecoin-project/lotus/blob/2e23e4024047f69ba38918c2ec54c71345d39357/api/eth_aliases.go

I feel like #9863 can close this but please confirm

[raulk]

We still register these aliases manually, but the effort is probably not worth the benefit, so I withdraw this.