Initial Vexta Core v0.1.0 release

test/functional/mempool_spend_coinbase.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+# Copyright (c) 2014-2020 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 DigiByteTestFramework
+from test_framework.util import assert_equal, assert_raises_rpc_error
+from test_framework.blocktools import COINBASE_MATURITY_2
+from test_framework.wallet import MiniWallet, MiniWalletMode
+
+
+class MempoolSpendCoinbaseTest(DigiByteTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 1
+        self.setup_clean_chain = True
+
+    def run_test(self):
+        wallet = MiniWallet(self.nodes[0], mode=MiniWalletMode.RAW_P2PK)
+
+        # Invalidate two blocks, so that miniwallet has access to a coin that will mature in the next block
+        chain_height = 198
+        wallet.generate(chain_height + 2, invalid_call=False)
+        self.nodes[0].invalidateblock(self.nodes[0].getblockhash(chain_height + 1))
+        assert_equal(chain_height, self.nodes[0].getblockcount())
+
+        # Coinbase at height 99 is mature for mempool spend at height 198.
+        # Coinbase at height 100 is still too immature.
+        utxo_mature = wallet._utxos[chain_height - COINBASE_MATURITY_2]
+        utxo_immature = wallet._utxos[chain_height - COINBASE_MATURITY_2 + 2]
+
+        spend_mature_id = wallet.send_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_mature)["txid"]
+
+        # Vexta accepts the next coinbase spend into mempool as well.
+        immature_tx = wallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_immature)
+        spend_immature_id = self.nodes[0].sendrawtransaction(immature_tx['hex'])
+
+        # mempool should have both spends
+        assert_equal(set(self.nodes[0].getrawmempool()), {spend_mature_id, spend_immature_id})
+
+        # mine a block, both should get confirmed
+        self.generate(self.nodes[0], 1)
+        assert_equal(set(self.nodes[0].getrawmempool()), set())
+
+
+if __name__ == '__main__':
+    MempoolSpendCoinbaseTest().main()