MPP.Codec (mpp v0.10.0)

Copy Markdown View Source

Shared base64url→JSON token decoding for the wire-format modules (MPP.Credential, MPP.Receipt, MPP.Methods.Tempo.SessionReceipt).

Owns exactly the decode→error-tag step; callers keep their own downstream shape validation (from_map/1) and any pre-checks (e.g. a token-size cap).

Summary

Functions

decode_base64_json(encoded)

Decode a base64url (no padding) JSON string into its parsed term.

Functions

decode_base64_json(encoded)

@spec decode_base64_json(String.t()) ::
  {:ok, term()} | {:error, :invalid_base64 | :invalid_json}

Decode a base64url (no padding) JSON string into its parsed term.

Returns {:ok, decoded} where decoded is the parsed JSON value, or a tagged error: {:error, :invalid_base64} when the string is not valid base64url, and {:error, :invalid_json} when the decoded bytes are not valid JSON.