From ad04d1cb35b9612d36078c62213bdbb13f56d73d Mon Sep 17 00:00:00 2001 From: Pieter Wuille Date: Fri, 18 Nov 2016 12:15:01 -0800 Subject: [PATCH 1/2] Always add default_witness_commitment with GBT client support --- src/main.cpp | 9 +-------- src/rpc/mining.cpp | 4 +++- src/test/miner_tests.cpp | 1 + 3 files changed, 5 insertions(+), 9 deletions(-) diff --git a/src/main.cpp b/src/main.cpp index 4293a6beb..56a510384 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -3531,15 +3531,8 @@ std::vector GenerateCoinbaseCommitment(CBlock& block, const CBloc { std::vector commitment; int commitpos = GetWitnessCommitmentIndex(block); - bool fHaveWitness = false; - for (size_t t = 1; t < block.vtx.size(); t++) { - if (!block.vtx[t]->wit.IsNull()) { - fHaveWitness = true; - break; - } - } std::vector ret(32, 0x00); - if (fHaveWitness && IsWitnessEnabled(pindexPrev, consensusParams)) { + if (consensusParams.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout != 0) { if (commitpos == -1) { uint256 witnessroot = BlockWitnessMerkleRoot(block, NULL); CHash256().Write(witnessroot.begin(), 32).Write(&ret[0], 32).Finalize(witnessroot.begin()); diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp index 6b0e52a30..f3cd1fbf0 100644 --- a/src/rpc/mining.cpp +++ b/src/rpc/mining.cpp @@ -680,7 +680,9 @@ UniValue getblocktemplate(const JSONRPCRequest& request) result.push_back(Pair("curtime", pblock->GetBlockTime())); result.push_back(Pair("bits", strprintf("%08x", pblock->nBits))); result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight+1))); - if (!pblocktemplate->vchCoinbaseCommitment.empty()) { + + const struct BIP9DeploymentInfo& segwit_info = VersionBitsDeploymentInfo[Consensus::DEPLOYMENT_SEGWIT]; + if (!pblocktemplate->vchCoinbaseCommitment.empty() && setClientRules.find(segwit_info.name) != setClientRules.end()) { result.push_back(Pair("default_witness_commitment", HexStr(pblocktemplate->vchCoinbaseCommitment.begin(), pblocktemplate->vchCoinbaseCommitment.end()))); } diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp index aea892093..85a2e907c 100644 --- a/src/test/miner_tests.cpp +++ b/src/test/miner_tests.cpp @@ -214,6 +214,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity) txCoinbase.vin[0].scriptSig = CScript(); txCoinbase.vin[0].scriptSig.push_back(blockinfo[i].extranonce); txCoinbase.vin[0].scriptSig.push_back(chainActive.Height()); + txCoinbase.vout.resize(1); // Ignore the (optional) segwit commitment added by CreateNewBlock (as the hardcoded nonces don't account for this) txCoinbase.vout[0].scriptPubKey = CScript(); pblock->vtx[0] = MakeTransactionRef(std::move(txCoinbase)); if (txFirst.size() == 0) From 95f4a03777ec2ad82a94a3e2890192a93ad83509 Mon Sep 17 00:00:00 2001 From: Suhas Daftuar Date: Sat, 19 Nov 2016 06:55:25 -0500 Subject: [PATCH 2/2] [qa] Test getblocktemplate default_witness_commitment --- qa/rpc-tests/p2p-segwit.py | 70 +++++++++++++++++++++++++------------- 1 file changed, 47 insertions(+), 23 deletions(-) diff --git a/qa/rpc-tests/p2p-segwit.py b/qa/rpc-tests/p2p-segwit.py index 6ecd84c3f..d344a16a4 100755 --- a/qa/rpc-tests/p2p-segwit.py +++ b/qa/rpc-tests/p2p-segwit.py @@ -195,11 +195,6 @@ class SegWitTest(BitcoinTestFramework): self.setup_clean_chain = True self.num_nodes = 3 - def add_options(self, parser): - parser.add_option("--oldbinary", dest="oldbinary", - default=None, - help="pre-segwit bitcoind binary for upgrade testing") - def setup_network(self): self.nodes = [] self.nodes.append(start_node(0, self.options.tmpdir, ["-debug", "-logtimemicros=1", "-whitelist=127.0.0.1"])) @@ -207,12 +202,9 @@ class SegWitTest(BitcoinTestFramework): self.nodes.append(start_node(1, self.options.tmpdir, ["-debug", "-logtimemicros=1", "-whitelist=127.0.0.1", "-acceptnonstdtxn=0"])) connect_nodes(self.nodes[0], 1) - # If an old bitcoind is given, do the upgrade-after-activation test. - self.test_upgrade = False - if (self.options.oldbinary != None): - self.nodes.append(start_node(2, self.options.tmpdir, ["-debug", "-whitelist=127.0.0.1"], binary=self.options.oldbinary)) - connect_nodes(self.nodes[0], 2) - self.test_upgrade = True + # Disable segwit's bip9 parameter to simulate upgrading after activation. + self.nodes.append(start_node(2, self.options.tmpdir, ["-debug", "-whitelist=127.0.0.1", "-bip9params=segwit:0:0"])) + connect_nodes(self.nodes[0], 2) ''' Helpers ''' # Build a block on top of node0's tip. @@ -1177,7 +1169,7 @@ class SegWitTest(BitcoinTestFramework): if segwit_activated: # tx and tx2 were both accepted. Don't bother trying to reclaim the # P2PKH output; just send tx's first output back to an anyone-can-spend. - sync_mempools(self.nodes) + sync_mempools([self.nodes[0], self.nodes[1]]) tx3.vin = [CTxIn(COutPoint(tx.sha256, 0), b"")] tx3.vout = [CTxOut(tx.vout[0].nValue-1000, CScript([OP_TRUE]))] tx3.wit.vtxinwit.append(CTxInWitness()) @@ -1706,19 +1698,53 @@ class SegWitTest(BitcoinTestFramework): def test_getblocktemplate_before_lockin(self): print("\tTesting getblocktemplate setting of segwit versionbit (before lockin)") - block_version = (self.nodes[0].getblocktemplate())['version'] - assert_equal(block_version & (1 << VB_WITNESS_BIT), 0) + # Node0 is segwit aware, node2 is not. + for node in [self.nodes[0], self.nodes[2]]: + gbt_results = node.getblocktemplate() + block_version = gbt_results['version'] + # If we're not indicating segwit support, we should not be signalling + # for segwit activation, nor should we get a witness commitment. + assert_equal(block_version & (1 << VB_WITNESS_BIT), 0) + assert('default_witness_commitment' not in gbt_results) # Workaround: # Can either change the tip, or change the mempool and wait 5 seconds # to trigger a recomputation of getblocktemplate. - self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1) + txid = int(self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1), 16) # Using mocktime lets us avoid sleep() + sync_mempools(self.nodes) self.nodes[0].setmocktime(int(time.time())+10) - - block_version = self.nodes[0].getblocktemplate({"rules" : ["segwit"]})['version'] - assert(block_version & (1 << VB_WITNESS_BIT) != 0) - self.nodes[0].setmocktime(0) # undo mocktime + self.nodes[2].setmocktime(int(time.time())+10) + + for node in [self.nodes[0], self.nodes[2]]: + gbt_results = node.getblocktemplate({"rules" : ["segwit"]}) + block_version = gbt_results['version'] + if node == self.nodes[2]: + # If this is a non-segwit node, we should still not get a witness + # commitment, nor a version bit signalling segwit. + assert_equal(block_version & (1 << VB_WITNESS_BIT), 0) + assert('default_witness_commitment' not in gbt_results) + else: + # For segwit-aware nodes, check the version bit and the witness + # commitment are correct. + assert(block_version & (1 << VB_WITNESS_BIT) != 0) + assert('default_witness_commitment' in gbt_results) + witness_commitment = gbt_results['default_witness_commitment'] + + # TODO: this duplicates some code from blocktools.py, would be nice + # to refactor. + # Check that default_witness_commitment is present. + block = CBlock() + witness_root = block.get_merkle_root([ser_uint256(0), ser_uint256(txid)]) + check_commitment = uint256_from_str(hash256(ser_uint256(witness_root)+ser_uint256(0))) + from test_framework.blocktools import WITNESS_COMMITMENT_HEADER + output_data = WITNESS_COMMITMENT_HEADER + ser_uint256(check_commitment) + script = CScript([OP_RETURN, output_data]) + assert_equal(witness_commitment, bytes_to_hex_str(script)) + + # undo mocktime + self.nodes[0].setmocktime(0) + self.nodes[2].setmocktime(0) # Uncompressed pubkeys are no longer supported in default relay policy, # but (for now) are still valid in blocks. @@ -1958,6 +1984,7 @@ class SegWitTest(BitcoinTestFramework): # Advance to segwit being 'started' self.advance_to_segwit_started() + sync_blocks(self.nodes) self.test_getblocktemplate_before_lockin() sync_blocks(self.nodes) @@ -2000,10 +2027,7 @@ class SegWitTest(BitcoinTestFramework): self.test_signature_version_1() self.test_non_standard_witness() sync_blocks(self.nodes) - if self.test_upgrade: - self.test_upgrade_after_activation(self.nodes[2], 2) - else: - print("\tSkipping upgrade-after-activation test (use --oldbinary to enable)") + self.test_upgrade_after_activation(self.nodes[2], 2) self.test_witness_sigops()