CompactEnum

A Compact enum value passed as a circuit argument (e.g. a struct field like Recipient.kind).

Compact enums marshal to a JS number at the circuit boundary — the generated wrapper guards enum fields with typeof(x) === 'number'. Plain Kotlin Int/Long marshal to a JS BigInt (1n) because Compact's Uint/Field types require BigInt, so an enum field needs this distinct type to be emitted as a bare number (1) instead.