docs: def raw(self) -> str:
          """
          Return a raw document of the certification
          """
          if not isinstance(self.identity, Identity):
              raise MalformedDocumentError("Can not return full certification document created from inline")
  
          return """Version: {version}
  Type: Certification
  Currency: {currency}
  Issuer: {issuer}
  IdtyIssuer: {certified_pubkey}
  IdtyUniqueID: {certified_uid}
  IdtyTimestamp: {certified_ts}
  IdtySignature: {certified_signature}
  CertTimestamp: {timestamp}
  """.format(version=self.version,
             currency=self.currency,
             issuer=self.pubkey_from,
             certified_pubkey=self.identity.pubkey,
             certified_uid=self.identity.uid,
             certified_ts=self.identity.timestamp,
             certified_signature=self.identity.signatures[0],
             timestamp=self.timestamp)