Blockchain-Code

Blockchain/Blockchain-Code

@@ -0,0 +1,36 @@
+class Blockchain:
+    def __init__(self):
+        self.chain = []
+        self.unconfirmed_transactions = []
+        self.genesis_block()
+
+    def genesis_block(self):
+        transactions = []
+        genesis_block = Block(transactions, "0")
+        genesis_block.generate_hash()
+        self.chain.append(genesis_block)
+
+    def add_block(self, transactions):
+        previous_hash = (self.chain[len(self.chain)-1]).hash
+        new_block = Block(transactions, previous_hash)
+        new_block.generate_hash()
+        # proof = proof_of_work(block)
+        self.chain.append(new_block)
+
+    def print_blocks(self):
+        for i in range(len(self.chain)):
+            current_block = self.chain[i]
+            print("Block {} {}".format(i, current_block))
+            current_block.print_contents()
+
+    def validate_chain(self):
+        for i in range(1, len(self.chain)):
+            current = self.chain[i]
+            previous = self.chain[i-1]
+            if(current.hash != current.generate_hash()):
+                print("Current hash does not equal generated hash")
+                return False
+            if(current.previous_hash != previous.generate_hash()):
+                print("Previous block's hash got changed")
+                return False
+        return True