Использование HMAC с SHA-256

nonce_finder.py

@@ -0,0 +1,32 @@
+import itertools
+import hashlib
+import hmac
+
+
+class NonceFinder:
+    def __init__(self, data, difficulty, key):
+        self.data = data
+        self.difficulty = difficulty
+        self.key = key
+
+    @staticmethod
+    def to_long(x):
+        return sum(ord(b) << (8 * i) for i, b in enumerate(x))
+
+    def verify_pow(self, nonce):
+        self.data[0]['nonce'] = nonce
+        # Использование HMAC с SHA-256
+        combined_data = str(self.data).encode()
+        hmac_result = hmac.new(self.key.encode(), combined_data, hashlib.sha256).hexdigest()
+        return self.to_long(list(hmac_result)) % (1 << self.difficulty) == 0
+
+    def create_pow(self):
+        for nonce in itertools.count(0):
+            if self.verify_pow(nonce):
+                combined_data = str(self.data).encode()
+                hmac_result = hmac.new(
+                    self.key.encode(),
+                    combined_data,
+                    hashlib.sha256
+                ).hexdigest()
+                return nonce, hmac_result