type
  quicly_cid_t* {.bycopy.} = object
    cid*: array[20, uint8]
    len*: uint8

  quicly_cid_plaintext_t* {.bycopy.} = object
    master_id*: uint32
    path_id* {.bitsize: 8.}: uint32
    thread_id* {.bitsize: 24.}: uint32
    node_id*: uint64

  quicly_cid_encryptor_t* {.bycopy.} = object
    encrypt_cid*: proc (self: ptr quicly_cid_encryptor_t;
                      encrypted: ptr quicly_cid_t; stateless_reset_token: pointer;
                      plaintext: ptr quicly_cid_plaintext_t) {.cdecl.}
    decrypt_cid*: proc (self: ptr quicly_cid_encryptor_t;
                      plaintext: ptr quicly_cid_plaintext_t; encrypted: pointer;
                      len: csize_t): csize_t {.cdecl.}
    generate_stateless_reset_token*: proc (self: ptr quicly_cid_encryptor_t;
        token: pointer; cid: pointer): cint {.cdecl.}