uncompressIPv6('2001:db8::ff00:42:8329')
"2001:0db8:0000:0000:0000:ff00:0042:8329"
uncompressIPv6('2001:db8::ff00:42:8329') == '2001:0db8:0000:0000:0000:ff00:0042:8329' // с википедии пример
true
uncompressIPv6('::A:B:127.0.0.1')
"0000:0000:0000:0000:0000:000a:000b:127.0.0.1"