Parses the token, checking that it meets the Jwt standards. In the event of success, decodeToken returns result of the JSON Decoder.

decodeToken dec token

All the token parsing goodness in the form of a Json Decoder

firebaseToken =
    Json.Decode.decodeString (tokenDecoder Jwt.Decoders.firebase) tokenString

Checks a token for Expiry (used the "exp" field). Returns expiry or any error that occurred in processing.

Extracts the token expiration timestamp from the JWT "exp" field. Returns the timestamp in milliseconds since epoch, or any error that occurred while processing the token.

Checks whether a token has expired, and returns True or False, or any error that occurred while processing the token.

Returns stringified json of the token's header

The following errors are modeled

• TokenProcessingError - something wrong with the the raw token (e.g. length, base64 encoding)
• TokenDecodeError - the token is not valid JSON or the decoder provided could not decode the body
• TokenHeaderError - the header is corrupted in some way

Provides a default conversion of a JwtError to a string