ConvertBits converts a byte slice where each byte is encoding fromBits bits, to a byte slice where each byte is encoding toBits bits.

Decode is like DecodeGeneric but also checks the checksum according to segwit version.

Decode decodes a blech32 encoded string, returning the human-readable part and the data part excluding the checksum.

Encode encodes a byte slice into a blech32 string with the human-readable part hrb.