Module errors 

Typed errors and their human-readable rendering (spec 0025).

• CardError: a failure reported by the card (status word) or by PC/SC, tagged with the operation yb was performing.
• YbError: one of yb’s own errors, already phrased as what / why / fix.

Both travel through anyhow unchanged; render turns an error chain into the text shown to the user.

Structs

ErrCtx

What the failing step knew when it failed (spec 0025 §1).

Explanation

The user-facing explanation of an error.

RenderEnv

What the renderer needs besides the error itself. Only the fallback for unexpected errors uses it (spec 0025 §2).

YbError

One of yb’s own errors (not from the card), phrased for the user.

Enums

CardError

A failure reported by the card or by PC/SC.

CardOp

The card operation that failed, in yb terms.

PcscCode

A PC/SC failure, reduced to the cases the catalog explains.

PcscOp

The PC/SC step that failed.

Functions

explain_pcsc

Explanation of a PC/SC failure, e.g. for list-readers hints.

render

Render an error chain for the user (spec 0025 §3).