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-rwxr-xr-xtest/rpc-tests/mempool_spendcoinbase.py62
1 files changed, 62 insertions, 0 deletions
diff --git a/test/rpc-tests/mempool_spendcoinbase.py b/test/rpc-tests/mempool_spendcoinbase.py
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+++ b/test/rpc-tests/mempool_spendcoinbase.py
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+#!/usr/bin/env python3
+# Copyright (c) 2014-2016 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test spending coinbase transactions.
+
+The coinbase transaction in block N can appear in block
+N+100... so is valid in the mempool when the best block
+height is N+99.
+This test makes sure coinbase spends that will be mature
+in the next block are accepted into the memory pool,
+but less mature coinbase spends are NOT.
+"""
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import *
+
+# Create one-input, one-output, no-fee transaction:
+class MempoolSpendCoinbaseTest(BitcoinTestFramework):
+
+ def __init__(self):
+ super().__init__()
+ self.num_nodes = 1
+ self.setup_clean_chain = False
+
+ def setup_network(self):
+ # Just need one node for this test
+ args = ["-checkmempool"]
+ self.nodes = []
+ self.nodes.append(start_node(0, self.options.tmpdir, args))
+ self.is_network_split = False
+
+ def run_test(self):
+ chain_height = self.nodes[0].getblockcount()
+ assert_equal(chain_height, 200)
+ node0_address = self.nodes[0].getnewaddress()
+
+ # Coinbase at height chain_height-100+1 ok in mempool, should
+ # get mined. Coinbase at height chain_height-100+2 is
+ # is too immature to spend.
+ b = [ self.nodes[0].getblockhash(n) for n in range(101, 103) ]
+ coinbase_txids = [ self.nodes[0].getblock(h)['tx'][0] for h in b ]
+ spends_raw = [ create_tx(self.nodes[0], txid, node0_address, 49.99) for txid in coinbase_txids ]
+
+ spend_101_id = self.nodes[0].sendrawtransaction(spends_raw[0])
+
+ # coinbase at height 102 should be too immature to spend
+ assert_raises_jsonrpc(-26,"bad-txns-premature-spend-of-coinbase", self.nodes[0].sendrawtransaction, spends_raw[1])
+
+ # mempool should have just spend_101:
+ assert_equal(self.nodes[0].getrawmempool(), [ spend_101_id ])
+
+ # mine a block, spend_101 should get confirmed
+ self.nodes[0].generate(1)
+ assert_equal(set(self.nodes[0].getrawmempool()), set())
+
+ # ... and now height 102 can be spent:
+ spend_102_id = self.nodes[0].sendrawtransaction(spends_raw[1])
+ assert_equal(self.nodes[0].getrawmempool(), [ spend_102_id ])
+
+if __name__ == '__main__':
+ MempoolSpendCoinbaseTest().main()