def test_4_wrong_previous_block(self):
self.blocks[0].previous_block_rev = BlockRev.from_id(double_sha(b'something'))
self.blocks[0].mine()
sign_object(self.public_key, self.private_key, self.blocks[0])
with self.assertRaisesRegex(Block.ChainError, "previous_block_rev does not exist"):
self.blocks[0].verify()
def mint_block():
if len(ops) >= MIN_OPS_IN_BLOCK:
print("Preparing block with {} operations.".format(len(ops)))
blockchain = pmpi.core.get_blockchain()
rev = BlockRev.from_id(blockchain.head) if blockchain.max_depth > 0 else BlockRev()
block = Block.from_operations_list(rev, int(time.time()), ops)
block.difficulty = 10 # TODO difficulty!
block.mine()
self.user.sign_object(block)
block.verify()
print("Block minted. Sending.")
self.transport.write(b'BL' + block.raw_with_operations())
else:
print("There are not enough operations to mint a block")
for op in ops:
asyncio.ensure_future(operation_queue.put(op))
