anchor.diff:  murmur3-32,                     multihash,      0x23,           draft,
   ip6,                            multiaddr,      0x29,           permanent,
   ip6zone,                        multiaddr,      0x2a,           draft,
  +ipcidr,                         multiaddr,      0x2b,           draft,     CIDR mask for IP addresses
   path,                           namespace,      0x2f,           permanent, Namespace for string paths. Corresponds to `/` in ASCII.
   multicodec,                     multiformat,    0x30,           draft,
   multihash,                      multiformat,    0x31,           draft,
  
positive.code: car,                            serialization,  0x0202,         draft,     Content Addressable aRchive (CAR)
  libp2p-peer-record,             libp2p,         0x0301,         permanent, libp2p peer record type
  libp2p-relay-rsvp,              libp2p,         0x0302,         permanent, libp2p relay reservation voucher
  car-index-sorted,               serialization,  0x0400,         draft,     CARv2 IndexSorted index format
  car-multihash-index-sorted,     serialization,  0x0401,         draft,     CARv2 MultihashIndexSorted index format
  transport-bitswap,              transport,      0x0900,         draft,     Bitswap datatransfer
  
negative.code: garlic64,                       multiaddr,      0x01be,         draft,     I2P base64 (raw public key)
  garlic32,                       multiaddr,      0x01bf,         draft,     I2P base32 (hashed public key or encoded public key/checksum+optional secret)
  tls,                            multiaddr,      0x01c0,         draft,
  sni,                            multiaddr,      0x01c1,         draft,     Server Name Indication RFC 6066 § 3
  noise,                          multiaddr,      0x01c6,         draft,
  quic,                           multiaddr,      0x01cc,         permanent,
  webtransport,                   multiaddr,      0x01d1,         draft,
  