Lib.rs

A crate containing common code used in multiple other crate in the workspace, such as:

• Utils to inspect a PSET: get the net effect of a PSET on a given wallet [pset_balance()], or get how many signatures are missing , and which signers should provide them [pset_signatures()].
• Signer trait: contains the methods to be implemented by a signer such as signing a pset or returning an xpub

To avoid circular dependencies this crate must not depend on other crate of the workspace