* feat: add basic fpnv

* chore: resolve comments

* fix: remove unused interface

* chore: update export

* chore: linting

* chore: update export

* feat: add apidocs

* chore: resolve commnets

* chore: linting

* chore: add unit test

* chore: change test description

* chore: remove extra line

* chore: add unit test

* chore: add unit test

* chore: fix minor comments

* chore: add unit test

* chore: add unot test

* chore: update api.md

* chore: update sdk

* feat: update fpnv

* chore: update jwt spec

* chore: resolve comments

* chore: test cover Fpnv index

* chore: update test coverage

* feat: add namespace support