From 94060e6bfd69993e7b5625ecd48b27bef4b5cab6 Mon Sep 17 00:00:00 2001
From: root <root@noreply.localhost>
Date: Sun, 24 Sep 2023 21:26:35 +0300
Subject: [PATCH] =?UTF-8?q?=D0=97=D0=B0=D0=B3=D1=80=D1=83=D0=B7=D0=B8?=
 =?UTF-8?q?=D1=82=D1=8C=20=D1=84=D0=B0=D0=B9=D0=BB=D1=8B=20=D0=B2=20=C2=AB?=
 =?UTF-8?q?/=C2=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 blockchainpy.py | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 blockchainpy.py

diff --git a/blockchainpy.py b/blockchainpy.py
new file mode 100644
index 0000000..62d5dc3
--- /dev/null
+++ b/blockchainpy.py
@@ -0,0 +1,45 @@
+import json
+from hashlib import sha256
+
+class BlockchainError(Exception): pass
+
+class blockchain:
+    def __init__(self):
+        self.blockchain=[]
+        self.transactionbyffer=[]
+    def newgenesis(self, data):
+        if len(self.blockchain)==0:
+            temp={"id":0, "data":data, "transactions":[], "roothash":0}
+            temp0=json.dumps(temp)
+            temp0=sha256(temp0.encode()).hexdigest()
+            temp["hash"]=temp0
+            self.blockchain.append(temp)
+        else:
+            raise BlockchainError()
+    def setbc(self, bc):
+        self.blockchain=bc
+    def addtx(self, data):
+        self.transactionbyffer.append(data)
+    def newblock(self, data):
+        temp0={"id":len(self.blockchain), "data":data, "transactions":json.dumps(self.transactionbyffer), "roothash":self.blockchain[len(self.blockchain)-1]["hash"]}
+        temp1=json.dumps(temp0)
+        temp1=sha256(temp1.encode()).hexdigest()
+        temp0["hash"]=temp1
+        self.blockchain.append(temp0)
+        self.transactionbyffer=[]
+    def checkblocks(self):
+        correct=1
+        index=0
+        for block in self.blockchain:
+            temp0=json.dumps({"id":block["id"], "data":block["data"], "transactions":block["transactions"], "roothash":block["roothash"]})
+            temp0=sha256(temp0.encode()).hexdigest()
+            if block["id"]!=self.blockchain[block["id"]]["id"]:
+                correct=0
+            if block["id"]!=0:
+                if self.blockchain[block["id"]-1]["hash"]!=block["roothash"]:
+                    correct=0
+            if block["hash"]!=temp0:
+                correct=0
+            index=index+1
+        return correct
+