Merge bitcoin#15891: test: Require standard txs in regtest by default

fa89bad test: Require standard txs in regtest (MarcoFalke)
fa9b419 test: Add test that mainnet requires standard txs (MarcoFalke)
fa613ca chainparams: Remove unused fMineBlocksOnDemand (MarcoFalke)

Pull request description:

  I don't see a reason why regtest should allow non-standard txs, as it makes testing mainnet behaviour such as bitcoin#15846 unnecessarily hard and unintuitive.

  Of course, testnet policy remains unchanged to allow propagation of non-standard txs.

ACKs for top commit:
  ajtowns:
    ACK fa89bad

Tree-SHA512: c4c675affb054868850bd2683aa07f4c741a448cbacb2ea8334191e105f426b0790fe6a468be61e9c5880d24154f7bf1c7075051697172dce92180c1bc3a1c90

Author: MarcoFalke

src/chainparams.cpp

@@ -309,7 +309,7 @@ class CMainParams : public CChainParams {
         fDefaultConsistencyChecks = false;
         fRequireStandard = true;
         fRequireRoutableExternalIP = true;
-        fMineBlocksOnDemand = false;
+        m_is_test_chain = false;
         fAllowMultipleAddressesFromGroup = false;
         fAllowMultiplePorts = false;
         nLLMQConnectionRetryTimeout = 60;
@@ -525,7 +525,7 @@ class CTestNetParams : public CChainParams {
         fDefaultConsistencyChecks = false;
         fRequireStandard = false;
         fRequireRoutableExternalIP = true;
-        fMineBlocksOnDemand = false;
+        m_is_test_chain = true;
         fAllowMultipleAddressesFromGroup = false;
         fAllowMultiplePorts = true;
         nLLMQConnectionRetryTimeout = 60;
@@ -726,7 +726,7 @@ class CDevNetParams : public CChainParams {
         fDefaultConsistencyChecks = false;
         fRequireStandard = false;
         fRequireRoutableExternalIP = true;
-        fMineBlocksOnDemand = false;
+        m_is_test_chain = true;
         fAllowMultipleAddressesFromGroup = true;
         fAllowMultiplePorts = true;
         nLLMQConnectionRetryTimeout = 60;
@@ -908,9 +908,9 @@ class CRegTestParams : public CChainParams {
         vSeeds.clear();      //!< Regtest mode doesn't have any DNS seeds.
 
         fDefaultConsistencyChecks = true;
-        fRequireStandard = false;
+        fRequireStandard = true;
         fRequireRoutableExternalIP = false;
-        fMineBlocksOnDemand = true;
+        m_is_test_chain = true;
         fAllowMultipleAddressesFromGroup = true;
         fAllowMultiplePorts = true;
         nLLMQConnectionRetryTimeout = 1; // must be lower then the LLMQ signing session timeout so that tests have control over failing behavior

src/chainparams.h

@@ -70,13 +70,15 @@ class CChainParams
     bool RequireStandard() const { return fRequireStandard; }
     /** Require addresses specified with "-externalip" parameter to be routable */
     bool RequireRoutableExternalIP() const { return fRequireRoutableExternalIP; }
+    /** If this is a test chain */
+    bool IsTestChain() const { return m_is_test_chain; }
     uint64_t PruneAfterHeight() const { return nPruneAfterHeight; }
     /** Minimum free space (in GB) needed for data directory */
     uint64_t AssumedBlockchainSize() const { return m_assumed_blockchain_size; }
     /** Minimum free space (in GB) needed for data directory when pruned; Does not include prune target*/
     uint64_t AssumedChainStateSize() const { return m_assumed_chain_state_size; }
-    /** Make miner stop after a block is found. In RPC, don't return until nGenProcLimit blocks are generated */
-    bool MineBlocksOnDemand() const { return fMineBlocksOnDemand; }
+    /** Whether it is possible to mine blocks on demand (no retargeting) */
+    bool MineBlocksOnDemand() const { return consensus.fPowNoRetargeting; }
     /** Allow multiple addresses to be selected from the same network group (e.g. 192.168.x.x) */
     bool AllowMultipleAddressesFromGroup() const { return fAllowMultipleAddressesFromGroup; }
     /** Allow nodes with the same address and multiple ports */
@@ -130,7 +132,7 @@ class CChainParams
     bool fDefaultConsistencyChecks;
     bool fRequireStandard;
     bool fRequireRoutableExternalIP;
-    bool fMineBlocksOnDemand;
+    bool m_is_test_chain;
     bool fAllowMultipleAddressesFromGroup;
     bool fAllowMultiplePorts;
     int nLLMQConnectionRetryTimeout;

src/init.cpp

@@ -1494,8 +1494,9 @@ bool AppInitParameterInteraction()
     }
 
     fRequireStandard = !gArgs.GetBoolArg("-acceptnonstdtxn", !chainparams.RequireStandard());
-    if (chainparams.RequireStandard() && !fRequireStandard)
+    if (!chainparams.IsTestChain() && !fRequireStandard) {
         return InitError(strprintf("acceptnonstdtxn is not currently supported for %s chain", chainparams.NetworkIDString()));
+    }
     nBytesPerSigOp = gArgs.GetArg("-bytespersigop", nBytesPerSigOp);
 
     if (!g_wallet_init_interface.ParameterInteraction()) return false;

test/functional/feature_bip68_sequence.py

@@ -21,7 +21,10 @@
 class BIP68Test(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 2
-        self.extra_args = [[], ["-acceptnonstdtxn=0"]]
+        self.extra_args = [
+            ["-acceptnonstdtxn=1"],
+            ["-acceptnonstdtxn=0"],
+        ]
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()

test/functional/feature_block.py

@@ -82,7 +82,7 @@ def set_test_params(self):
         # which causes RPC to hang, so we need to increase RPC timeouts
         self.rpc_timeout = 180
         # Must set '-dip3params=2000:2000' to create pre-dip3 blocks only
-        self.extra_args = [['-dip3params=2000:2000']]
+        self.extra_args = [['-dip3params=2000:2000', '-acceptnonstdtxn=1']]  # This is a consensus block test, we don't care about tx policy
 
     def setup_nodes(self):
         self.add_nodes(self.num_nodes, self.extra_args)

test/functional/feature_cltv.py

@@ -59,7 +59,12 @@ def cltv_validate(node, tx, height):
 class BIP65Test(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
-        self.extra_args = [['-whitelist=127.0.0.1', '-dip3params=9000:9000', '-par=1']]  # Use only one script thread to get the exact reject reason for testing
+        self.extra_args = [[
+            '-whitelist=127.0.0.1',
+            '-dip3params=9000:9000',
+            '-par=1',  # Use only one script thread to get the exact reject reason for testing
+            '-acceptnonstdtxn=1',  # cltv_invalidate is nonstandard
+        ]]
         self.setup_clean_chain = True
         self.rpc_timeout = 120
 

test/functional/feature_config_args.py

@@ -40,6 +40,11 @@ def test_config_file_parser(self):
                 conf.write("wallet=foo\n")
             self.nodes[0].assert_start_raises_init_error(expected_msg='Error: Config setting for -wallet only applied on regtest network when in [regtest] section.')
 
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('regtest=0\n') # mainnet
+            conf.write('acceptnonstdtxn=1\n')
+        self.nodes[0].assert_start_raises_init_error(expected_msg='Error: acceptnonstdtxn is not currently supported for main chain')
+
         with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
             conf.write('nono\n')
         self.nodes[0].assert_start_raises_init_error(expected_msg='Error reading configuration file: parse error on line 1: nono, if you intended to specify a negated option, use nono=1 instead')

test/functional/feature_dip0020_activation.py

@@ -19,6 +19,7 @@
 class DIP0020ActivationTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
+        self.extra_args = [["-acceptnonstdtxn=1"]]
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
@@ -31,7 +32,7 @@ def run_test(self):
         utxos = self.node.listunspent()
         assert len(utxos) > 0
 
-        # Send some coins to a P2SH address constructed using disabled opcodes
+        # Lock some coins using disabled opcodes
         utxo = utxos[len(utxos) - 1]
         value = int(satoshi_round(utxo["amount"] - self.relayfee) * COIN)
         tx = CTransaction()

test/functional/feature_fee_estimation.py

@@ -126,9 +126,9 @@ def set_test_params(self):
         self.num_nodes = 3
         # mine non-standard txs (e.g. txs with "dust" outputs)
         self.extra_args = [
-            ["-maxorphantxsize=1000", "-whitelist=127.0.0.1"],
-            ["-blockmaxsize=17000", "-maxorphantxsize=1000", "-whitelist=127.0.0.1"],
-            ["-blockmaxsize=8000", "-maxorphantxsize=1000", "-whitelist=127.0.0.1"]
+            ["-acceptnonstdtxn=1", "-maxorphantxsize=1000", "-whitelist=127.0.0.1"],
+            ["-acceptnonstdtxn=1", "-blockmaxsize=17000", "-maxorphantxsize=1000", "-whitelist=127.0.0.1"],
+            ["-acceptnonstdtxn=1", "-blockmaxsize=8000", "-maxorphantxsize=1000", "-whitelist=127.0.0.1"]
         ]
 
     def skip_test_if_missing_module(self):

test/functional/feature_maxuploadtarget.py

@@ -35,7 +35,7 @@ class MaxUploadTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 1
-        self.extra_args = [["-maxuploadtarget=200", "-blockmaxsize=999000", "-maxtipage="+str(2*60*60*24*7)]]
+        self.extra_args = [["-maxuploadtarget=200", "-blockmaxsize=999000", "-maxtipage="+str(2*60*60*24*7), "-acceptnonstdtxn=1"]]
 
         # Cache for utxos, as the listunspent may take a long time later in the test
         self.utxo_cache = []