Support v0.18.x getblockchaininfo with single request

[stevenroose]

Closes #167.

[shesek]

Looks good!

Maybe worth pulling the conversion code for backwards compatibility out of the get_blockchain_info method though, just to keep things more tidy? Most other methods are pretty short, typically a few-liners.

[stevenroose]

Looks good!

Maybe worth pulling the conversion code for backwards compatibility out of the get_blockchain_info method though, just to keep things more tidy? Most other methods are pretty short, typically a few-liners.

Do you like the idea of having a compat::v0_18 module for that? So that we can make them for future versions?

[shesek]

@stevenroose Yes, I like it. More organized and tucked away from the main code.

[sgeisler]

utACK 71fc2b1