Two minor observations:

DecodeBase58Check is listed as inline, but isnt actually inlined in the header.

This makes it both non-present in libbitcoin_common.a and unavailable
to other code that would use libbitcoin_common.a as a library. (bug?)

In general, the hierarchy of tools is poor/weak. for example base58.h could be a fairly
independent low level math/string library, but it includes caddress, which
requires chainparams, and makes the whole dependency tree quite involved...

Is there an intention that the various internal libraries could/should
be strengthened and heirachicalized such that they would be suitable for

3rd party development of bitcoin related services and tools, or is that not
a goal, and some other project would have to fill such a role ?