DA namespace encoded as utf string and not as hexa string

[omritoptix]

it caused hexa repr like 2e to be intereperted as our seperator (i.e .) which caused the logic of len parts to fail which is based on out seperator.
The right way would be to encode as hexa string and decode as extra string.

The logic that failed:

if len(pathParts) == 7 { (we got 8 instead)

[srene]

fixed in this pr #731