Module error 

Error taxonomy used across the crate.

Errors surfaced to clients are modelled as MostroError, which is split into two branches:

• MostroError::MostroCantDo — a “soft” error: the request was well-formed but the server refuses to perform the action (e.g. the order is not in the right state). Clients should surface the inner CantDoReason to the user.
• MostroError::MostroInternalErr — a “hard” error: something went wrong while processing the request (database failure, Nostr relay issue, malformed invoice, etc.). The inner ServiceError carries the diagnostic detail.

Both inner enums implement Display with human-readable messages suited for logging.

Enums

CantDoReason

Machine-readable reasons carried by a CantDo response.

MostroError

Top-level error type returned by the Mostro API surface.

ServiceError

Internal errors raised by services behind the Mostro API.