Create node_reputation.py

projects/piguardian/node_reputation_system/node_reputation.py

@@ -0,0 +1,67 @@
+import os
+import json
+import hashlib
+import time
+from collections import defaultdict
+
+class NodeReputationSystem:
+    def __init__(self, node_id, reputation_db='reputation.db'):
+        self.node_id = node_id
+        self.reputation_db = reputation_db
+        self.reputation_data = self.load_reputation_data()
+
+    def load_reputation_data(self):
+        if os.path.exists(self.reputation_db):
+            with open(self.reputation_db, 'r') as f:
+                return json.load(f)
+        else:
+            return defaultdict(lambda: {'reputation': 0, 'transactions': 0, 'blocks': 0})
+
+    def save_reputation_data(self):
+        with open(self.reputation_db, 'w') as f:
+            json.dump(self.reputation_data, f)
+
+    def calculate_reputation(self, node_id, transaction_hash, block_hash, is_valid):
+        if node_id not in self.reputation_data:
+            self.reputation_data[node_id] = {'reputation': 0, 'transactions': 0, 'blocks': 0}
+
+        if is_valid:
+            self.reputation_data[node_id]['reputation'] += 1
+            self.reputation_data[node_id]['transactions'] += 1
+            if block_hash:
+                self.reputation_data[node_id]['blocks'] += 1
+        else:
+            self.reputation_data[node_id]['reputation'] -= 1
+
+        self.save_reputation_data()
+
+    def get_reputation(self, node_id):
+        if node_id in self.reputation_data:
+            return self.reputation_data[node_id]['reputation']
+        else:
+            return 0
+
+    def get_node_ranking(self):
+        node_ranks = sorted(self.reputation_data.items(), key=lambda x: x[1]['reputation'], reverse=True)
+        return node_ranks
+
+    def verify_transaction(self, transaction_hash):
+        # TO DO: implement transaction verification logic
+        pass
+
+    def verify_block(self, block_hash):
+        # TO DO: implement block verification logic
+        pass
+
+    def run(self):
+        while True:
+            # Listen for incoming transactions and blocks
+            # Verify transactions and blocks using verify_transaction and verify_block methods
+            # Calculate reputation using calculate_reputation method
+            # Get node ranking using get_node_ranking method
+            # Print node ranking
+            time.sleep(10)
+
+if __name__ == '__main__':
+    node_reputation_system = NodeReputationSystem('node1')
+    node_reputation_system.run()