a simple algorithm on blockchain technology

johnsoncarl · web-flow · commit 0bc937f8f433 · 2018-10-29T00:13:44.000+05:30
this is the simple blockchain algorithm implementation making use of classes for securing data and making final blockchain
diff --git a/Blockchain/blockchain_algorithm.py b/Blockchain/blockchain_algorithm.py
@@ -0,0 +1,47 @@
+from hashlib import sha256
+import time
+
+class block:
+	def __init__ (self, timestamp, data, previousHash = ' '):
+		self.timestamp = timestamp
+		self.data = data
+		self.previousHash = previousHash
+		self.hash = self.calculateHash()
+
+	def calculateHash(self):
+		return sha256((str(self.timestamp) + str(self.data) + str(self.previousHash)).encode()).hexdigest()
+
+
+class blockchain:
+	def __init__(self):
+		self.chain = [self.createGenesis()]
+
+	def createGenesis(self):
+		return block(time.ctime(), "genesisBlock", "00000")
+
+	def mineBlock(self, data):
+		node = block(time.ctime(), data, self.chain[-1].hash)
+		# mining a new block to the blockchain
+		self.chain.append(node)
+
+	def printBlockchain(self):
+		for i in range(len(self.chain)):
+			print("\n-----Block ", i ,"---------\n timestamp = "\
+				       , self.chain[i].timestamp,"\n data = ", \
+				       		self.chain[i].data, "\n previousHash = ",\
+				       		 self.chain[i].previousHash,"\n hash = ", \
+				       		    self.chain[i].hash)
+
+
+
+CEVcoin = blockchain()
+
+data = input()
+
+# sending data to get mined 
+print("\n\n ----> Mining New Block -->")
+CEVcoin.mineBlock(data)
+
+print("\n\n ----> New Block mined successfully --> ")
+
+CEVcoin.printBlockchain()
