Variable: lookupCarc
constlookupCarc: (code) =>CodeListEntry|undefined
Look up a CARC code's bundled description. Returns undefined when
the code is not in the initial subset - the verbatim code is still
preserved on the parsed model and the 835 walker emits
X12_UNKNOWN_CARC so consumers know the description gap exists.
Parameters
code
string
Returns
CodeListEntry | undefined
Example
import { lookupCarc } from "@cosyte/x12";
lookupCarc("45")?.description; // "Charge exceeds fee schedule..."
lookupCarc("9999"); // undefined (outside the bundled subset)