Function parse_client_data 

pub fn parse_client_data(raw: &[u8]) -> Result<ParsedClientData>

Decode and parse raw clientDataJSON bytes.

raw must be the UTF-8 JSON bytes — not base64url encoded. The caller is responsible for base64url decoding the wire value before calling this.

Does not validate type, challenge, or origin — call validate_client_data for that, so each check can produce a precise error.

Errors

• WebAuthnError::InvalidClientData — JSON parse failure or missing fields.
• WebAuthnError::Base64DecodeError — challenge field is not valid base64url.