def test_flow_1(): """ This MUST NOT fail We simply add two blocks, each one with only the coinbase transaction """ coinbase_0 = Tx( [TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))], [TxOut(10**10, Script())], ) origin_transactions = [coinbase_0] origin_header = BlockHeader("00" * 32, generate_merkle_root(origin_transactions), 0) origin = Block(origin_header, origin_transactions) blockchain = Blockchain() blockchain._add_block(origin) assert blockchain.get_last_blocks()[0][0] == origin.header.pow coinbase_1 = Tx( [TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000bb"))], [TxOut(10**10, Script())], ) block_1_header = BlockHeader(origin.header.pow, generate_merkle_root([coinbase_1]), 0) block_1 = Block(block_1_header, [coinbase_1]) blockchain._add_block(block_1) assert blockchain.get_last_blocks()[0][0] == block_1.header.pow reset_blockchain()
def test_flow_13(): coinbase_0 = Tx([TxIn(OutPoint("00" * 32, 0), Script())], [TxOut(10**10, Script())]) origin_transactions = [coinbase_0] origin_header = BlockHeader("00" * 32, generate_merkle_root(origin_transactions), 0) origin = Block(origin_header, origin_transactions) blockchain = Blockchain() blockchain._add_block(origin) assert blockchain.get_last_blocks()[0][0] == origin.header.pow coinbase_1 = Tx( [TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))], [TxOut(10**10, Script())], ) block_1_header = BlockHeader("ff" * 32, generate_merkle_root([coinbase_1]), 0) block_1 = Block(block_1_header, [coinbase_1]) with pytest.raises(Exception): blockchain._add_block(block_1) reset_blockchain()
def test_flow_7(): """ This MUST fail The two coinbases have the same txid """ coinbase_0 = Tx([TxIn(OutPoint("00" * 32, 0), Script())], [TxOut(10**10, Script())]) origin_transactions = [coinbase_0] origin_header = BlockHeader("00" * 32, generate_merkle_root(origin_transactions), 0) origin = Block(origin_header, origin_transactions) blockchain = Blockchain() blockchain._add_block(origin) assert blockchain.get_last_blocks()[0][0] == origin.header.pow coinbase_1 = Tx([TxIn(OutPoint("00" * 32, 0), Script())], [TxOut(10**10, Script())]) block_1_header = BlockHeader(origin.header.pow, generate_merkle_root([coinbase_1]), 0) block_1 = Block(block_1_header, [coinbase_1]) with pytest.raises(Exception): blockchain._add_block(block_1) reset_blockchain()
def test_flow_12(): """ This MUST NOT fail """ blockchain = Blockchain() coinbase_0 = Tx([TxIn(OutPoint("00" * 32, 0), Script())], [TxOut(10**10, Script())]) origin_transactions = [coinbase_0] origin_header = BlockHeader("00" * 32, generate_merkle_root(origin_transactions), 0) origin = Block(origin_header, origin_transactions) blockchain._add_block(origin) coinbase_1 = Tx( [TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))], [TxOut(5 * 10**9, Script()), TxOut(5 * 10**9, Script())], ) tx = Tx( [TxIn(OutPoint(coinbase_0.txid, 0), Script())], [TxOut(10**10 - 100, Script()), TxOut(50, Script())], ) block_1_transactions = [coinbase_1, tx] block_1_header = BlockHeader(origin.header.pow, generate_merkle_root(block_1_transactions), 0) block_1 = Block(block_1_header, block_1_transactions) coinbase_2 = Tx( [TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000bb"))], [TxOut(10**10, Script())], ) tx_2 = Tx([TxIn(OutPoint(tx.txid, 0), Script())], [TxOut(10**10 - 200, Script())]) tx_3 = Tx( [ TxIn(OutPoint(coinbase_1.txid, 0), Script()), TxIn(OutPoint(coinbase_1.txid, 1), Script()), TxIn(OutPoint(tx.txid, 1), Script()), ], [TxOut(10**10 + 50, Script())], ) block_2_transactions = [coinbase_2, tx_2, tx_3] block_2_header = BlockHeader(block_1.header.pow, generate_merkle_root(block_2_transactions), 0) block_2 = Block(block_2_header, block_2_transactions) # we try adding the origin again, no problem, it is skipped assert blockchain.add_blocks([origin, block_1, block_2]) coinbase_3 = Tx( [TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000cc"))], [TxOut(10**10, Script())], ) # tx_4 speds the same inputs as tx_2, but it is in a different chain so it is OK tx_4 = Tx( [TxIn(OutPoint(tx.txid, 0), Script.from_hex("00030000dd"))], [TxOut(10**10 - 200, Script())], ) block_3_transactions = [coinbase_3, tx_4] block_3_header = BlockHeader(block_1.header.pow, generate_merkle_root(block_3_transactions), 0) block_3 = Block(block_3_header, block_3_transactions) block_3.header.nonce = calculate_nonce(block_3_header, 100) coinbase_4 = Tx( [TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000ee"))], [TxOut(10**10, Script())], ) block_4_transactions = [coinbase_4] # invalid reference, must be block_3 header, not block_2 block_4_header = BlockHeader(block_2.header.pow, generate_merkle_root(block_4_transactions), 0) block_4 = Block(block_4_header, block_4_transactions) assert blockchain.add_blocks([block_3, block_4]) assert blockchain.get_last_blocks()[0][0] == block_3.header.pow block_4.header = BlockHeader(block_3.header.pow, generate_merkle_root(block_4_transactions), 0) assert blockchain.add_blocks([block_3, block_4]) assert blockchain.get_last_blocks()[0][0] == block_4.header.pow reset_blockchain()