Prefix of an IPv6 address when it contains an embedded TORv2 address. Used when (un)serializing addresses in ADDRv1 format (pre-BIP155). Such dummy IPv6 addresses are guaranteed to not be publicly routable as they fall under RFC4193's fc00::/7 subnet allocated to unique-local addresses.
Declared in <netaddress.h>
inline constexpr std::array<uint8_t, 6> TORV2_IN_IPV6_PREFIX = {
0xFD, 0x87, 0xD8, 0x7E, 0xEB, 0x43};