def is_valid_chain(chain):
prev = bk.Block('1', '1', '1')
prev.hash = '0' * 64
for b in chain:
bv.validate(b)
if prev != None:
assert prev.hash == b.previous_hash, "Invalid blockchain!"
prev = b
return True
def test_blockchain(self):
t = tn.CoinbaseTransaction(wt.pubToAddress(wt.privToPub(pk)))
t.sign(pk)
genesis_block = bk.Block(time.time(), '0' * 64,
s.Serializer.serialize(t))
genesis_block.mine(2)
bv.validate(genesis_block)
'''genesis'''
tr = tn.Transaction(wt.pubToAddress(wt.privToPub(pk)),
'12pULxeW59imr1mWs8AjQogji8H77KD3KT', 5)
tr.sign(pk)
sr = s.Serializer.serialize(tr)
lst = []
lst.append(s.Serializer.serialize(t))
lst.append(sr)
lst.append(sr)
lst.append(sr)
b1 = bk.Block(time.time(), genesis_block.hash, lst)
b1.mine(2)
bv.validate(b1)
b2 = bk.Block(time.time(), b1.hash, lst)
b2.mine(2)
bv.validate(b2)
chain = []
chain.append(genesis_block)
chain.append(b1)
chain.append(b2)
#b2.timestamp = "1241"
self.assertTrue(is_valid_chain(chain))
chain
def new_block():
global BLOCKCHAIN
if request.method == 'POST':
b = request.get_json()
#d = json.loads(b.decode('utf-8'))
blck = to_object(b)
if block_validator.validate(blck):
BLOCKCHAIN.append(blck)
"[TODO] Remove transactions from mempool"
"[TODO] Remove spended utxo and added new"
with open('blocks/' + '%04d' % int(BLOCKCHAIN.index(blck)) + '.block',
'w') as outfile:
json.dump(b, outfile)
return 'Added'
def test_genesis_block(self):
t = tn.CoinbaseTransaction(wt.pubToAddress(wt.privToPub(pk)))
t.sign(pk)
b = bk.Block('123142.124', '0' * 64, s.Serializer.serialize(t))
b.mine(2)
bv.validate(b)