better way to create bls kys
better way to create bls kys


Former-commit-id: 9d4e5e2a8b32d0c75edb9b134247cd5d8e46a77f
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin