Anyone how to calculate pub key length
What do you mean? How many characters/digits in a pubkey? Compressed, Uncompressed?
compressed, starts with 02 or 03:
03284635D3127EA5E6AFFAD7213BED1BBB63535D9B2B4E22F63ED5093CB30FDAA5
uncompressed:
04284635D3127EA5E6AFFAD7213BED1BBB63535D9B2B4E22F63ED5093CB30FDAA5F30279671068A413636A6116F3E43CFB2B476067C8CF6F801EE68E8C3E6D5F4F