def add_block():
try:
block_json = request.get_json(force=True)
block = Block.from_dict(block_json)
rs = (grequests.post(f'{node["address"]}/validate', data=request.data) for node in json.loads(get_nodes()))
responses = grequests.map(rs)
validated_chains = 1
unvalidated_chains = 0
total_valids = 2
total_unvalids = 4
for response in responses:
if response.status_code == 201:
validated_chains += 1
if validated_chains == total_valids:
break
elif response.status_code == 400:
unvalidated_chains += 1
if unvalidated_chains == total_unvalids:
break
if validated_chains == total_valids:
blockchain.add_block(block)
announce_new_block(block_json)
return jsonify({'message': f'Block #{block.index} added to the Blockchain'}), 201
elif unvalidated_chains == total_unvalids:
consensus()
return jsonify({'message': 'Blockchain was Outdated'}), 400
else:
return jsonify({'message': f'Block rejected: {block}'}), 400
except (KeyError, TypeError, ValueError):
return jsonify({'message': f'Invalid block format'}), 400
except BlockchainException as bce:
return jsonify({'message': f'Block rejected: {block}'}), 400
def validate_block():
try:
block = request.get_json(force=True)
block = Block.from_dict(block)
return jsonify({'message': f'Block #{block.index} is a valid block!'}), 201
except (KeyError, TypeError, ValueError):
return jsonify({'message': f'Invalid block format'}), 400
except BlockchainException as bce:
return jsonify({'message': f'Invalid block: {bce}'}), 400
def add_block():
try:
block = request.get_json(force=True)
block = Block.from_dict(block)
blockchain.add_block(block)
return jsonify(
{'message': f'Block #{block.index} added to the Blockchain'}), 201
except (KeyError, TypeError, ValueError):
return jsonify({'message': f'Invalid block format'}), 400
except BlockchainException as bce:
return jsonify({'message': f'Block rejected: {bce}'}), 400
def add_block():
try:
block_json = request.get_json(force=True)
block = Block.from_dict(block_json)
rs = (grequests.post(f'{node["address"]}/validate', data=request.data) for node in json.loads(get_nodes()))
responses = grequests.map(rs)
validated_chains = 1
unvalidated_chains = 0
total_valids = 2
total_unvalids = 4
for response in responses:
if response.status_code == 201:
validated_chains += 1
if validated_chains == total_valids:
break
elif response.status_code == 400:
unvalidated_chains += 1
if unvalidated_chains == total_unvalids:
break
def minerarBloco(self, address):
wallet = KeyPair(address)
r = requests.get('https://uclcriptocoin.herokuapp.com/block/minable/' +
wallet.public_key)
print(r.text)
last_block = json.loads(r.text)
block = Block.from_dict(last_block["block"])
difficulty = last_block["difficulty"]
while block.current_hash[:difficulty].count('0') < difficulty:
block.nonce += 1
block.recalculate_hash()
data = json.dumps(block, default=lambda x: x.__dict__)
r = requests.post('https://uclcriptocoin.herokuapp.com/block',
data,
json=True)
print(r.text)
def consensus():
"""
Our simple consnsus algorithm. If a longer valid chain is
found, our chain is replaced with it.
"""
global blockchain
result = False
current_len = blockchain._blocks.count()
rs = (grequests.get(f'{node["address"]}/chain') for node in json.loads(get_nodes()))
responses = grequests.map(rs)
for response in responses:
if response != None and response.status_code == 200:
blocks = response.json()
if len(blocks) > current_len:
current_len = len(blocks)
blockchain.clear()
for block in blocks:
temp_block = Block.from_dict(block)
blockchain.add_block(temp_block)
result = True
from uclcoin import Block
import requests
import json
from collections import namedtuple
r = requests.get(
'http://127.0.0.1:5000/block/minable/036b86d828203c1d2f30d689b45fcae5bc700358afafd18012f15121220de17662'
)
last_block = json.loads(r.text)
block = Block.from_dict(last_block["block"])
difficulty = last_block["difficulty"]
while block.current_hash[:difficulty].count('0') < difficulty:
block.nonce += 1
block.recalculate_hash()
data = json.dumps(block, default=lambda x: x.__dict__)
r = requests.post('http://127.0.0.1:5000/block', data, json=True)
print(r.text)
def verify_and_add_block():
block_data = request.get_json()
block = Block.from_dict(block_data)
blockchain.add_block(block)
return "The block was added", 200
def opcMineracao(chave):
inicio = fim = block_time = 0
max_iteration = 10000000
count_iteration = 0
res = requests.get(f'{url}/block/minable/{chave}')
res = res.json()
dificuldade = res['difficulty']
block = res['block']
currentblock = block['index']
print('Bloco para Mineração Carregado... \nÍndice: ', currentblock)
block = Block.from_dict(block)
print('\n... INICIANDO ...\n')
inicio = time.time()
while (block.current_hash[:dificuldade].count('0') < dificuldade):
block.nonce += 1
block.recalculate_hash()
count_iteration = count_iteration + 1
if (count_iteration == max_iteration):
fim = time.time()
block_time = int((fim - inicio) / 60)
addpoint(block_time, balancekey(chave))
count_iteration = 0
res = requests.get(f'{url}/block/minable/{chave}')
res = res.json()
requestedblock = res['block']
requestedblock = requestedblock['index']
try:
print('...')
except KeyboardInterrupt:
return
if (currentblock != requestedblock):
block_point = point(currentblock, 'Perda', block_time,
balancekey(chave))
plotpoint(block_point)
print('\nBloco Perdido, Iniciando novo Bloco!\n')
opcMineracao(chave)
fim = time.time()
block_time = int((fim - inicio) / 60)
print('\n Mineração do Bloco Finalizada!\nTempo Decorrido: ', block_time,
' min')
res = requests.post(f'{url}/block', json=dict(block))
if res.ok:
print('\nMineração Aceita pela BlockChain!')
addpoint(block_time, balancekey(chave))
block_point = point(currentblock, 'Aceito', block_time,
balancekey(chave))
plotpoint(block_point)
else:
print('\nMineração Rejeitada pela BlockChain!')
addpoint(block_time, balancekey(chave))
block_point = point(currentblock, 'Rejeitado', block_time,
balancekey(chave))
plotpoint(block_point)
opcMineracao(chave)