jonaqp · July 20, 2017 20:45 · Jul 16, 2017 · Jul 15, 2017 · Jul 15, 2017 · Jul 15, 2017
diff --git a/snakecoin.py b/snakecoin.py
@@ -25,7 +25,7 @@ def create_genesis_block():
 def next_block(last_block):
   this_index = last_block.index + 1
   this_timestamp = date.datetime.now()
-  this_data = "Hey! I'm block" + str(this_index)
+  this_data = "Hey! I'm block " + str(this_index)
   this_hash = last_block.hash
   return Block(this_index, this_timestamp, this_data, this_hash)
 

diff --git a/snakecoin.py b/snakecoin.py
@@ -39,6 +39,9 @@ def next_block(last_block):
 
 # Add blocks to the chain
 for i in range(0, num_of_blocks_to_add):
-  blockchain.append(next_block(previous_block))
-  # Set previous block to the block we just added
-  previous_block = blockchain[len(blockchain) - 1]
+  block_to_add = next_block(previous_block)
+  blockchain.append(block_to_add)
+  previous_block = block_to_add
+  # Tell everyone about it!
+  print "Block #{} has been added to the blockchain!".format(block_to_add.index)
+  print "Hash: {}\n".format(block_to_add.hash) 
diff --git a/snakecoin.py b/snakecoin.py
@@ -27,7 +27,7 @@ def next_block(last_block):
   this_timestamp = date.datetime.now()
   this_data = "Hey! I'm block" + str(this_index)
   this_hash = last_block.hash
-  return Block(this_index, this_timestamp, this_data, last_block, this_hash)
+  return Block(this_index, this_timestamp, this_data, this_hash)
 
 # Create the blockchain and add the genesis block
 blockchain = [create_genesis_block()]

diff --git a/snakecoin.py b/snakecoin.py
@@ -38,7 +38,7 @@ def next_block(last_block):
 num_of_blocks_to_add = 20
 
 # Add blocks to the chain
-for i in range(0, num_of_blocks_to add):
+for i in range(0, num_of_blocks_to_add):
   blockchain.append(next_block(previous_block))
   # Set previous block to the block we just added
   previous_block = blockchain[len(blockchain) - 1]
diff --git a/snakecoin.py b/snakecoin.py
@@ -0,0 +1,44 @@
+import hashlib as hasher
+import datetime as date
+
+# Define what a Snakecoin block is
+class Block:
+  def __init__(self, index, timestamp, data, previous_hash):
+    self.index = index
+    self.timestamp = timestamp
+    self.data = data
+    self.previous_hash = previous_hash
+    self.hash = self.hash_block()
+
+  def hash_block(self):
+    sha = hasher.sha256()
+    sha.update(str(self.index) + str(self.timestamp) + str(self.data) + str(self.previous_hash))
+    return sha.hexdigest()
+
+# Generate genesis block
+def create_genesis_block():
+  # Manually construct a block with
+  # index zero and arbitrary previous hash
+  return Block(0, date.datetime.now(), "Genesis Block", "0")
+
+# Generate all later blocks in the blockchain
+def next_block(last_block):
+  this_index = last_block.index + 1
+  this_timestamp = date.datetime.now()
+  this_data = "Hey! I'm block" + str(this_index)
+  this_hash = last_block.hash
+  return Block(this_index, this_timestamp, this_data, last_block, this_hash)
+
+# Create the blockchain and add the genesis block
+blockchain = [create_genesis_block()]
+previous_block = blockchain[0]
+
+# How many blocks should we add to the chain
+# after the genesis block
+num_of_blocks_to_add = 20
+
+# Add blocks to the chain
+for i in range(0, num_of_blocks_to add):
+  blockchain.append(next_block(previous_block))
+  # Set previous block to the block we just added
+  previous_block = blockchain[len(blockchain) - 1]