proc base64UrlEncode(data: seq[byte]): string {....raises: [], tags: [],
    forbids: [].}

proc createCSR(domain: string; certKeyPair: RsaPrivateKey): string {.
    ...raises: [ACMEError], tags: [], forbids: [].}

proc getResponseBody(response: HttpClientResponseRef): InternalRaisesFuture[
    JsonNode, (ACMEError, CancelledError)] {....stackTrace: false, raises: [],
    gcsafe, tags: [RootEffect], forbids: [].}

proc keyOrError(table: HttpTable; key: string): string {....raises: [ValueError],
    tags: [], forbids: [].}

proc thumbprint(key: RsaPrivateKey): string {....raises: [], tags: [], forbids: [].}