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- from time import sleep
- from src.protocol import Protocol
- from src.mining import Miner
- from src.block import GENESIS_BLOCK
- from src.crypto import Signing
- from src.transaction import Transaction, TransactionInput, TransactionTarget
- def test_proto():
- reward_key = Signing.generate_private_key()
- proto1 = Protocol([], GENESIS_BLOCK, 1337)
- proto2 = Protocol([("127.0.0.1", 1337)], GENESIS_BLOCK, 1338)
- miner1 = Miner(proto1, reward_key)
- miner2 = Miner(proto2, reward_key)
- miner2.start_mining()
- miner1.start_mining()
- sleep(5)
- target_key = Signing.generate_private_key()
- reward_trans = miner2.chainbuilder.primary_block_chain.blocks[20].transactions[0]
- trans_in = TransactionInput(reward_trans.get_hash(), 0)
- trans_targ = TransactionTarget(target_key, reward_trans.targets[0].amount)
- trans = Transaction([trans_in], [trans_targ])
- trans.sign([reward_key])
- assert trans.verify(miner1.chainbuilder.primary_block_chain, set()), "transaction should be valid"
- proto2.received('transaction', trans.to_json_compatible(), None)
- sleep(5)
- chain_len1 = len(miner1.chainbuilder.primary_block_chain.blocks)
- chain_len2 = len(miner2.chainbuilder.primary_block_chain.blocks)
- print("Length of chain of miner 1: {}".format(chain_len1))
- print("Length of chain of miner 2: {}".format(chain_len2))
- miner1.stop_mining()
- miner2.stop_mining()
- assert max(chain_len1, chain_len2) * 90 // 100 < min(chain_len1, chain_len2), "chain lengths are VERY different"
- chain1 = miner1.chainbuilder.primary_block_chain
- hashes1 = [b.hash for b in chain1.blocks[:chain_len1 * 90 // 100]]
- hashes2 = [b.hash for b in miner2.chainbuilder.primary_block_chain.blocks[:chain_len1 * 90 // 100]]
- assert hashes1 == hashes2, "first 90% of chains should be identical"
- assert not trans.verify(miner1.chainbuilder.primary_block_chain, set()), "inserted transaction should be spent and therefore invalid"
- assert chain1.is_coin_still_valid(TransactionInput(trans.get_hash(), 0)), "someone spent our coins?"
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