Modify level2_ring.py

Author: Susmita-Chakrabarty

ZKP_Demo_Tool/levels/level2_ring.py

@@ -0,0 +1,34 @@
+from PyQt5.QtCore import QPointF
+from levels.base_level import BaseLevel
+
+class Level2Ring(BaseLevel):
+    def __init__(self, parent_selector):
+        super().__init__("Level 2: Encrypted Fraud Network", parent_selector)
+
+        # Realistic scenario narration
+        self.update_narration(
+            "🕵️ Prover: These 8 nodes represent accounts in a suspected fraud ring.\n"
+            "Each edge is a known interaction. Prove that directly connected accounts\n"
+            "don’t share the same fraud classification — without revealing any labels."
+        )
+
+        # Node layout (visually inspired by screenshot)
+        positions = [
+            QPointF(300, 400),  # 0 - bottom center-left
+            QPointF(150, 300),  # 1
+            QPointF(150, 200),  # 2
+            QPointF(300, 100),  # 3 - top center-left
+            QPointF(450, 100),  # 4 - top center-right
+            QPointF(600, 200),  # 5
+            QPointF(600, 300),  # 6
+            QPointF(450, 400)   # 7 - bottom center-right
+        ]
+
+        # Edge list (dense fraud ring)
+        edges = [
+            (0, 1), (0, 7), (1, 2), (1, 7), (2, 3),
+            (3, 4), (4, 5), (5, 6), (6, 7),
+            (2, 5), (1, 4), (3, 6), (0, 5), (7, 2)
+        ]
+
+        self.create_graph(positions, edges)