EncodeGroupId - Encode GroupId to number string(output pattern: [10][3][3][25]).

Ipv4IntToIpv4String - Convert Ipv4 int64 to string.

Ipv4ToInt - Convert Ipv4 string to int64.

Ipv6IntToIpv6String - Convert Ipv6 *big.Int to string.

Ipv6ToInt - Convert Ipv6 string to *bigInt.