55 lines
2.3 KiB
Python
55 lines
2.3 KiB
Python
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#!/usr/bin/env python3
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# Copyright (c) 2014-2020 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Test spending coinbase transactions.
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The coinbase transaction in block N can appear in block
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N+100... so is valid in the mempool when the best block
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height is N+99.
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This test makes sure coinbase spends that will be mature
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in the next block are accepted into the memory pool,
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but less mature coinbase spends are NOT.
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"""
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from test_framework.test_framework import DigiByteTestFramework
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from test_framework.util import assert_equal, assert_raises_rpc_error
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from test_framework.blocktools import COINBASE_MATURITY_2
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from test_framework.wallet import MiniWallet, MiniWalletMode
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class MempoolSpendCoinbaseTest(DigiByteTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.setup_clean_chain = True
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def run_test(self):
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wallet = MiniWallet(self.nodes[0], mode=MiniWalletMode.RAW_P2PK)
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# Invalidate two blocks, so that miniwallet has access to a coin that will mature in the next block
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chain_height = 198
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wallet.generate(chain_height + 2, invalid_call=False)
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self.nodes[0].invalidateblock(self.nodes[0].getblockhash(chain_height + 1))
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assert_equal(chain_height, self.nodes[0].getblockcount())
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# Coinbase at height 99 is mature for mempool spend at height 198.
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# Coinbase at height 100 is still too immature.
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utxo_mature = wallet._utxos[chain_height - COINBASE_MATURITY_2]
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utxo_immature = wallet._utxos[chain_height - COINBASE_MATURITY_2 + 2]
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spend_mature_id = wallet.send_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_mature)["txid"]
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# Vexta accepts the next coinbase spend into mempool as well.
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immature_tx = wallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_immature)
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spend_immature_id = self.nodes[0].sendrawtransaction(immature_tx['hex'])
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# mempool should have both spends
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assert_equal(set(self.nodes[0].getrawmempool()), {spend_mature_id, spend_immature_id})
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# mine a block, both should get confirmed
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self.generate(self.nodes[0], 1)
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assert_equal(set(self.nodes[0].getrawmempool()), set())
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if __name__ == '__main__':
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MempoolSpendCoinbaseTest().main()
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