Amarula.Protocol.Auth.CompanionReg (amarula v0.1.0)

Helpers for the link-code (phone-number) pairing flow.

Currently this is the Crockford base32 encoder used to mint the 8-character pairing code from 5 random bytes — a faithful port of Baileys bytesToCrockford (src/Utils/generics.ts). The companion platform-id table lives in Amarula.Connection (companion_platform_id/1), reused by both QR and link-code pairing.

Summary

Functions

crockford_encode(bytes)

Encode a binary as a Crockford base32 string.

Functions

crockford_encode(bytes)

@spec crockford_encode(binary()) :: String.t()

Encode a binary as a Crockford base32 string.

Groups the input MSB-first into 5-bit chunks; a trailing partial chunk is left-padded (shifted up) to a full 5 bits. Mirrors Baileys bytesToCrockford.

iex> Amarula.Protocol.Auth.CompanionReg.crockford_encode(<<0, 1, 2, 3, 4>>)
"111H51R5"