First working implementation of the genid method

noid.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 
+import random
+
 from dataclass_persistence import Persistent
 from dataclasses import dataclass, field
 from typing import ClassVar
@@ -72,7 +74,18 @@ class Minter(Persistent):
         #      - value + (index * percounter)
         #      - mask
         # 10. return the noid
-        return ""
+        if self.oacounter >= self.oatop:
+            raise Exception("noid are exhausted.")
+        s = len(self.active_counters)
+        if s < 1:
+            raise Exception("noid are exhausted.")
+        idx = random.randrange(s)
+        c = self.active_counters[idx]
+        c.value += 1
+        self.oacounter += 1
+        if c.value >= c.top:
+            self.active_counters.pop(idx)
+        return self._n2xdig(c.value + (c.rank * self.percounter))
 
     def initcounters(self) -> None:
         # 1. [X] Initialize oacounter to 0