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@Jzarecta
Created July 7, 2018 17:55
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import hashlib as hasher
import datetime as date
# Define la estructura del bloque
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()
# Genera el bloq inicial o genesis
def create_genesis_block():
# Manualmente construimos un bloque
# con el indice cero y con un hash vacio
return Block(0, date.datetime.now(), "Genesis Block", "0")
# Genera los siguientes bloques
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, this_hash)
# Crea los bloques así como el bloq inicial
blockchain = [create_genesis_block()]
previous_block = blockchain[0]
# Especificamos el numero de bloq a armar
# despues del block genesis
num_of_blocks_to_add = 20
# Agrega el bloque a la cadena
for i in range(0, num_of_blocks_to_add):
block_to_add = next_block(previous_block)
blockchain.append(block_to_add)
previous_block = block_to_add
# Le dice a todos sobre este
print "Bloq #{} ha sido agregado a nuestra cadena de bloques!".format(block_to_add.index)
print "Hash: {}\n".format(block_to_add.hash)
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