[Consensus] Bury CSV deployment height

Hard code CSV deployment height to 419328 for mainnet.

8 files changed, 54 insertions, 98 deletions

diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index c24234aeb7..59c105817b 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -69,6 +69,7 @@ public:
         consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8");
         consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
         consensus.BIP66Height = 363725; // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
+        consensus.CSVHeight = 419328; // 000000000000000004a1b34462cb8aeebd5799177f7a29cf28f2d1961716b5b5
         consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
         consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
         consensus.nPowTargetSpacing = 10 * 60;
@@ -80,11 +81,6 @@ public:
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
 
-        // Deployment of BIP68, BIP112, and BIP113.
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1462060800; // May 1st, 2016
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1493596800; // May 1st, 2017
-
         // Deployment of SegWit (BIP141, BIP143, and BIP147)
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1479168000; // November 15th, 2016.
@@ -183,6 +179,7 @@ public:
         consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8");
         consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
         consensus.BIP66Height = 330776; // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
+        consensus.CSVHeight = 770112; // 00000000025e930139bac5c6c31a403776da130831ab85be56578f3fa75369bb
         consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
         consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
         consensus.nPowTargetSpacing = 10 * 60;
@@ -194,11 +191,6 @@ public:
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
 
-        // Deployment of BIP68, BIP112, and BIP113.
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1456790400; // March 1st, 2016
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1493596800; // May 1st, 2017
-
         // Deployment of SegWit (BIP141, BIP143, and BIP147)
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1462060800; // May 1st 2016
@@ -275,6 +267,7 @@ public:
         consensus.BIP34Hash = uint256();
         consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in functional tests)
         consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in functional tests)
+        consensus.CSVHeight = 432; // CSV activated on regtest (Used in rpc activation tests)
         consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
         consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
         consensus.nPowTargetSpacing = 10 * 60;
@@ -285,9 +278,6 @@ public:
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 0;
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 0;
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
diff --git a/src/consensus/params.h b/src/consensus/params.h
index 6c3a201f4f..69881ffdf2 100644
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -16,7 +16,6 @@ namespace Consensus {
 enum DeploymentPos
 {
     DEPLOYMENT_TESTDUMMY,
-    DEPLOYMENT_CSV, // Deployment of BIP68, BIP112, and BIP113.
     DEPLOYMENT_SEGWIT, // Deployment of BIP141, BIP143, and BIP147.
     // NOTE: Also add new deployments to VersionBitsDeploymentInfo in versionbits.cpp
     MAX_VERSION_BITS_DEPLOYMENTS
@@ -58,6 +57,8 @@ struct Params {
     int BIP65Height;
     /** Block height at which BIP66 becomes active */
     int BIP66Height;
+    /** Block height at which CSV (BIP68, BIP112 and BIP113) becomes active */
+    int CSVHeight;
     /**
      * Minimum blocks including miner confirmation of the total of 2016 blocks in a retargeting period,
      * (nPowTargetTimespan / nPowTargetSpacing) which is also used for BIP9 deployments.
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 4e5fb2f00d..808324afea 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1337,7 +1337,7 @@ UniValue getblockchaininfo(const JSONRPCRequest& request)
     BuriedForkDescPushBack(softforks, "bip34", consensusParams.BIP34Height);
     BuriedForkDescPushBack(softforks, "bip66", consensusParams.BIP66Height);
     BuriedForkDescPushBack(softforks, "bip65", consensusParams.BIP65Height);
-    BIP9SoftForkDescPushBack(softforks, "csv", consensusParams, Consensus::DEPLOYMENT_CSV);
+    BuriedForkDescPushBack(softforks, "csv", consensusParams.CSVHeight);
     BIP9SoftForkDescPushBack(softforks, "segwit", consensusParams, Consensus::DEPLOYMENT_SEGWIT);
     BIP9SoftForkDescPushBack(softforks, "testdummy", consensusParams, Consensus::DEPLOYMENT_TESTDUMMY);
     obj.pushKV("softforks",             softforks);
diff --git a/src/validation.cpp b/src/validation.cpp
index b4677df62f..fc15b755a7 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -1644,8 +1644,8 @@ static unsigned int GetBlockScriptFlags(const CBlockIndex* pindex, const Consens
         flags |= SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY;
     }
 
-    // Start enforcing BIP68 (sequence locks) and BIP112 (CHECKSEQUENCEVERIFY) using versionbits logic.
-    if (VersionBitsState(pindex->pprev, consensusparams, Consensus::DEPLOYMENT_CSV, versionbitscache) == ThresholdState::ACTIVE) {
+    // Start enforcing BIP112 (CHECKSEQUENCEVERIFY)
+    if (pindex->nHeight >= consensusparams.CSVHeight) {
         flags |= SCRIPT_VERIFY_CHECKSEQUENCEVERIFY;
     }
 
@@ -1834,9 +1834,9 @@ bool CChainState::ConnectBlock(const CBlock& block, CValidationState& state, CBl
         }
     }
 
-    // Start enforcing BIP68 (sequence locks) and BIP112 (CHECKSEQUENCEVERIFY) using versionbits logic.
+    // Start enforcing BIP68 (sequence locks)
     int nLockTimeFlags = 0;
-    if (VersionBitsState(pindex->pprev, chainparams.GetConsensus(), Consensus::DEPLOYMENT_CSV, versionbitscache) == ThresholdState::ACTIVE) {
+    if (pindex->nHeight >= chainparams.GetConsensus().CSVHeight) {
         nLockTimeFlags |= LOCKTIME_VERIFY_SEQUENCE;
     }
 
@@ -3185,9 +3185,9 @@ static bool ContextualCheckBlock(const CBlock& block, CValidationState& state, c
 {
     const int nHeight = pindexPrev == nullptr ? 0 : pindexPrev->nHeight + 1;
 
-    // Start enforcing BIP113 (Median Time Past) using versionbits logic.
+    // Start enforcing BIP113 (Median Time Past).
     int nLockTimeFlags = 0;
-    if (VersionBitsState(pindexPrev, consensusParams, Consensus::DEPLOYMENT_CSV, versionbitscache) == ThresholdState::ACTIVE) {
+    if (nHeight >= consensusParams.CSVHeight) {
         assert(pindexPrev != nullptr);
         nLockTimeFlags |= LOCKTIME_MEDIAN_TIME_PAST;
     }
diff --git a/src/versionbitsinfo.cpp b/src/versionbitsinfo.cpp
index ecf3482927..60bfaace99 100644
--- a/src/versionbitsinfo.cpp
+++ b/src/versionbitsinfo.cpp
@@ -12,10 +12,6 @@ const struct VBDeploymentInfo VersionBitsDeploymentInfo[Consensus::MAX_VERSION_B
         /*.gbt_force =*/ true,
     },
     {
-        /*.name =*/ "csv",
-        /*.gbt_force =*/ true,
-    },
-    {
         /*.name =*/ "segwit",
         /*.gbt_force =*/ true,
     }
diff --git a/test/functional/feature_bip68_sequence.py b/test/functional/feature_bip68_sequence.py
index f0bf09e172..fe6f9eade1 100755
--- a/test/functional/feature_bip68_sequence.py
+++ b/test/functional/feature_bip68_sequence.py
@@ -14,8 +14,8 @@ from test_framework.util import (
     assert_equal,
     assert_greater_than,
     assert_raises_rpc_error,
-    get_bip9_status,
     satoshi_round,
+    softfork_active,
 )
 
 SEQUENCE_LOCKTIME_DISABLE_FLAG = (1<<31)
@@ -52,7 +52,7 @@ class BIP68Test(BitcoinTestFramework):
         self.log.info("Running test sequence-lock-unconfirmed-inputs")
         self.test_sequence_lock_unconfirmed_inputs()
 
-        self.log.info("Running test BIP68 not consensus before versionbits activation")
+        self.log.info("Running test BIP68 not consensus before activation")
         self.test_bip68_not_consensus()
 
         self.log.info("Activating BIP68 (and 112/113)")
@@ -336,12 +336,12 @@ class BIP68Test(BitcoinTestFramework):
         self.nodes[0].invalidateblock(self.nodes[0].getblockhash(cur_height+1))
         self.nodes[0].generate(10)
 
-    # Make sure that BIP68 isn't being used to validate blocks, prior to
-    # versionbits activation.  If more blocks are mined prior to this test
+    # Make sure that BIP68 isn't being used to validate blocks prior to
+    # activation height.  If more blocks are mined prior to this test
     # being run, then it's possible the test has activated the soft fork, and
     # this test should be moved to run earlier, or deleted.
     def test_bip68_not_consensus(self):
-        assert get_bip9_status(self.nodes[0], 'csv')['status'] != 'active'
+        assert not softfork_active(self.nodes[0], 'csv')
         txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 2)
 
         tx1 = FromHex(CTransaction(), self.nodes[0].getrawtransaction(txid))
@@ -391,9 +391,9 @@ class BIP68Test(BitcoinTestFramework):
         height = self.nodes[0].getblockcount()
         assert_greater_than(min_activation_height - height, 2)
         self.nodes[0].generate(min_activation_height - height - 2)
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], "locked_in")
+        assert not softfork_active(self.nodes[0], 'csv')
         self.nodes[0].generate(1)
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], "active")
+        assert softfork_active(self.nodes[0], 'csv')
         self.sync_blocks()
 
     # Use self.nodes[1] to test that version 2 transactions are standard.
diff --git a/test/functional/feature_csv_activation.py b/test/functional/feature_csv_activation.py
index 887e9dafa3..6bd321992a 100755
--- a/test/functional/feature_csv_activation.py
+++ b/test/functional/feature_csv_activation.py
@@ -2,23 +2,17 @@
 # Copyright (c) 2015-2019 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 activation of the first version bits soft fork.
+"""Test CSV soft fork activation.
 
 This soft fork will activate the following BIPS:
 BIP 68  - nSequence relative lock times
 BIP 112 - CHECKSEQUENCEVERIFY
 BIP 113 - MedianTimePast semantics for nLockTime
 
-regtest lock-in with 108/144 block signalling
-activation after a further 144 blocks
-
 mine 82 blocks whose coinbases will be used to generate inputs for our tests
-mine 61 blocks to transition from DEFINED to STARTED
-mine 144 blocks only 100 of which are signaling readiness in order to fail to change state this period
-mine 144 blocks with 108 signaling and verify STARTED->LOCKED_IN
-mine 140 blocks and seed block chain with the 82 inputs will use for our tests at height 572
-mine 3 blocks and verify still at LOCKED_IN and test that enforcement has not triggered
-mine 1 block and test that enforcement has triggered (which triggers ACTIVE)
+mine 345 blocks and seed block chain with the 82 inputs will use for our tests at height 427
+mine 2 blocks and verify soft fork not yet activated
+mine 1 block and test that soft fork is activated (rules enforced for next block)
 Test BIP 113 is enforced
 Mine 4 blocks so next height is 580 and test BIP 68 is enforced for time and height
 Mine 1 block so next height is 581 and test BIP 68 now passes time but not height
@@ -58,11 +52,12 @@ from test_framework.script import (
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
-    get_bip9_status,
     hex_str_to_bytes,
+    softfork_active,
 )
 
 BASE_RELATIVE_LOCKTIME = 10
+CSV_ACTIVATION_HEIGHT = 432
 SEQ_DISABLE_FLAG = 1 << 31
 SEQ_RANDOM_HIGH_BIT = 1 << 25
 SEQ_TYPE_FLAG = 1 << 22
@@ -148,20 +143,19 @@ class BIP68_112_113Test(BitcoinTestFramework):
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
 
-    def generate_blocks(self, number, version, test_blocks=None):
-        if test_blocks is None:
-            test_blocks = []
+    def generate_blocks(self, number):
+        test_blocks = []
         for i in range(number):
-            block = self.create_test_block([], version)
+            block = self.create_test_block([])
             test_blocks.append(block)
             self.last_block_time += 600
             self.tip = block.sha256
             self.tipheight += 1
         return test_blocks
 
-    def create_test_block(self, txs, version=536870912):
+    def create_test_block(self, txs):
         block = create_block(self.tip, create_coinbase(self.tipheight + 1), self.last_block_time + 600)
-        block.nVersion = version
+        block.nVersion = 4
         block.vtx.extend(txs)
         block.hashMerkleRoot = block.calc_merkle_root()
         block.rehash()
@@ -187,45 +181,14 @@ class BIP68_112_113Test(BitcoinTestFramework):
         self.tip = int(self.nodes[0].getbestblockhash(), 16)
         self.nodeaddress = self.nodes[0].getnewaddress()
 
-        self.log.info("Test that the csv softfork is DEFINED")
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'defined')
-        test_blocks = self.generate_blocks(61, 4)
-        self.send_blocks(test_blocks)
-
-        self.log.info("Advance from DEFINED to STARTED, height = 143")
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'started')
-
-        self.log.info("Fail to achieve LOCKED_IN")
-        # 100 out of 144 signal bit 0. Use a variety of bits to simulate multiple parallel softforks
-
-        test_blocks = self.generate_blocks(50, 536870913)  # 0x20000001 (signalling ready)
-        test_blocks = self.generate_blocks(20, 4, test_blocks)  # 0x00000004 (signalling not)
-        test_blocks = self.generate_blocks(50, 536871169, test_blocks)  # 0x20000101 (signalling ready)
-        test_blocks = self.generate_blocks(24, 536936448, test_blocks)  # 0x20010000 (signalling not)
-        self.send_blocks(test_blocks)
-
-        self.log.info("Failed to advance past STARTED, height = 287")
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'started')
-
-        self.log.info("Generate blocks to achieve LOCK-IN")
-        # 108 out of 144 signal bit 0 to achieve lock-in
-        # using a variety of bits to simulate multiple parallel softforks
-        test_blocks = self.generate_blocks(58, 536870913)  # 0x20000001 (signalling ready)
-        test_blocks = self.generate_blocks(26, 4, test_blocks)  # 0x00000004 (signalling not)
-        test_blocks = self.generate_blocks(50, 536871169, test_blocks)  # 0x20000101 (signalling ready)
-        test_blocks = self.generate_blocks(10, 536936448, test_blocks)  # 0x20010000 (signalling not)
-        self.send_blocks(test_blocks)
-
-        self.log.info("Advanced from STARTED to LOCKED_IN, height = 431")
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'locked_in')
-
-        # Generate 140 more version 4 blocks
-        test_blocks = self.generate_blocks(140, 4)
+        # Activation height is hardcoded
+        test_blocks = self.generate_blocks(345)
         self.send_blocks(test_blocks)
+        assert not softfork_active(self.nodes[0], 'csv')
 
-        # Inputs at height = 572
+        # Inputs at height = 431
         #
-        # Put inputs for all tests in the chain at height 572 (tip now = 571) (time increases by 600s per block)
+        # Put inputs for all tests in the chain at height 431 (tip now = 430) (time increases by 600s per block)
         # Note we reuse inputs for v1 and v2 txs so must test these separately
         # 16 normal inputs
         bip68inputs = []
@@ -255,7 +218,7 @@ class BIP68_112_113Test(BitcoinTestFramework):
         bip113input = send_generic_input_tx(self.nodes[0], self.coinbase_blocks, self.nodeaddress)
 
         self.nodes[0].setmocktime(self.last_block_time + 600)
-        inputblockhash = self.nodes[0].generate(1)[0]  # 1 block generated for inputs to be in chain at height 572
+        inputblockhash = self.nodes[0].generate(1)[0]  # 1 block generated for inputs to be in chain at height 431
         self.nodes[0].setmocktime(0)
         self.tip = int(inputblockhash, 16)
         self.tipheight += 1
@@ -263,11 +226,12 @@ class BIP68_112_113Test(BitcoinTestFramework):
         assert_equal(len(self.nodes[0].getblock(inputblockhash, True)["tx"]), 82 + 1)
 
         # 2 more version 4 blocks
-        test_blocks = self.generate_blocks(2, 4)
+        test_blocks = self.generate_blocks(2)
         self.send_blocks(test_blocks)
 
-        self.log.info("Not yet advanced to ACTIVE, height = 574 (will activate for block 576, not 575)")
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'locked_in')
+        assert_equal(self.tipheight, CSV_ACTIVATION_HEIGHT - 2)
+        self.log.info("Height = {}, CSV not yet active (will activate for block {}, not {})".format(self.tipheight, CSV_ACTIVATION_HEIGHT, CSV_ACTIVATION_HEIGHT - 1))
+        assert not softfork_active(self.nodes[0], 'csv')
 
         # Test both version 1 and version 2 transactions for all tests
         # BIP113 test transaction will be modified before each use to put in appropriate block time
@@ -340,10 +304,11 @@ class BIP68_112_113Test(BitcoinTestFramework):
         self.send_blocks([self.create_test_block(success_txs)])
         self.nodes[0].invalidateblock(self.nodes[0].getbestblockhash())
 
-        # 1 more version 4 block to get us to height 575 so the fork should now be active for the next block
-        test_blocks = self.generate_blocks(1, 4)
+        # 1 more version 4 block to get us to height 432 so the fork should now be active for the next block
+        assert not softfork_active(self.nodes[0], 'csv')
+        test_blocks = self.generate_blocks(1)
         self.send_blocks(test_blocks)
-        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'active')
+        assert softfork_active(self.nodes[0], 'csv')
 
         self.log.info("Post-Soft Fork Tests.")
 
@@ -364,8 +329,8 @@ class BIP68_112_113Test(BitcoinTestFramework):
             self.send_blocks([self.create_test_block([bip113tx])])
             self.nodes[0].invalidateblock(self.nodes[0].getbestblockhash())
 
-        # Next block height = 580 after 4 blocks of random version
-        test_blocks = self.generate_blocks(4, 1234)
+        # Next block height = 437 after 4 blocks of random version
+        test_blocks = self.generate_blocks(4)
         self.send_blocks(test_blocks)
 
         self.log.info("BIP 68 tests")
@@ -392,8 +357,8 @@ class BIP68_112_113Test(BitcoinTestFramework):
         for tx in bip68heighttxs:
             self.send_blocks([self.create_test_block([tx])], success=False)
 
-        # Advance one block to 581
-        test_blocks = self.generate_blocks(1, 1234)
+        # Advance one block to 438
+        test_blocks = self.generate_blocks(1)
         self.send_blocks(test_blocks)
 
         # Height txs should fail and time txs should now pass 9 * 600 > 10 * 512
@@ -403,8 +368,8 @@ class BIP68_112_113Test(BitcoinTestFramework):
         for tx in bip68heighttxs:
             self.send_blocks([self.create_test_block([tx])], success=False)
 
-        # Advance one block to 582
-        test_blocks = self.generate_blocks(1, 1234)
+        # Advance one block to 439
+        test_blocks = self.generate_blocks(1)
         self.send_blocks(test_blocks)
 
         # All BIP 68 txs should pass
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
index c25698fe89..095e0e3e7b 100644
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -346,6 +346,10 @@ def get_bip9_status(node, key):
     info = node.getblockchaininfo()
     return info['softforks'][key]['bip9']
 
+def softfork_active(node, key):
+    """Return whether a softfork is active."""
+    return node.getblockchaininfo()['softforks'][key]['active']
+
 def set_node_times(nodes, t):
     for node in nodes:
         node.setmocktime(t)