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-rw-r--r--src/chainparams.cpp11
-rw-r--r--src/consensus/params.h11
-rw-r--r--src/validation.cpp23
-rwxr-xr-xtest/functional/feature_taproot.py10
4 files changed, 28 insertions, 27 deletions
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 2e823c1211..c35d265f3c 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -9,6 +9,7 @@
#include <consensus/merkle.h>
#include <deploymentinfo.h>
#include <hash.h> // for signet block challenge hash
+#include <script/interpreter.h>
#include <util/system.h>
#include <assert.h>
@@ -65,7 +66,10 @@ public:
consensus.signet_blocks = false;
consensus.signet_challenge.clear();
consensus.nSubsidyHalvingInterval = 210000;
- consensus.BIP16Exception = uint256S("0x00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22");
+ consensus.script_flag_exceptions.emplace( // BIP16 exception
+ uint256S("0x00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22"), SCRIPT_VERIFY_NONE);
+ consensus.script_flag_exceptions.emplace( // Taproot exception
+ uint256S("0x0000000000000000000f14c35b2d841e986ab5441de8c585d5ffe55ea1e395ad"), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS);
consensus.BIP34Height = 227931;
consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8");
consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
@@ -184,7 +188,8 @@ public:
consensus.signet_blocks = false;
consensus.signet_challenge.clear();
consensus.nSubsidyHalvingInterval = 210000;
- consensus.BIP16Exception = uint256S("0x00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105");
+ consensus.script_flag_exceptions.emplace( // BIP16 exception
+ uint256S("0x00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105"), SCRIPT_VERIFY_NONE);
consensus.BIP34Height = 21111;
consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8");
consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
@@ -323,7 +328,6 @@ public:
consensus.signet_blocks = true;
consensus.signet_challenge.assign(bin.begin(), bin.end());
consensus.nSubsidyHalvingInterval = 210000;
- consensus.BIP16Exception = uint256{};
consensus.BIP34Height = 1;
consensus.BIP34Hash = uint256{};
consensus.BIP65Height = 1;
@@ -391,7 +395,6 @@ public:
consensus.signet_blocks = false;
consensus.signet_challenge.clear();
consensus.nSubsidyHalvingInterval = 150;
- consensus.BIP16Exception = uint256();
consensus.BIP34Height = 1; // Always active unless overridden
consensus.BIP34Hash = uint256();
consensus.BIP65Height = 1; // Always active unless overridden
diff --git a/src/consensus/params.h b/src/consensus/params.h
index 77bf7fd0d8..aca1995c36 100644
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -7,7 +7,9 @@
#define BITCOIN_CONSENSUS_PARAMS_H
#include <uint256.h>
+
#include <limits>
+#include <map>
namespace Consensus {
@@ -70,8 +72,13 @@ struct BIP9Deployment {
struct Params {
uint256 hashGenesisBlock;
int nSubsidyHalvingInterval;
- /* Block hash that is excepted from BIP16 enforcement */
- uint256 BIP16Exception;
+ /**
+ * Hashes of blocks that
+ * - are known to be consensus valid, and
+ * - buried in the chain, and
+ * - fail if the default script verify flags are applied.
+ */
+ std::map<uint256, uint32_t> script_flag_exceptions;
/** Block height and hash at which BIP34 becomes active */
int BIP34Height;
uint256 BIP34Hash;
diff --git a/src/validation.cpp b/src/validation.cpp
index f21d6cdbf1..f465c96720 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -1581,18 +1581,18 @@ static ThresholdConditionCache warningcache[VERSIONBITS_NUM_BITS] GUARDED_BY(cs_
static unsigned int GetBlockScriptFlags(const CBlockIndex& block_index, const Consensus::Params& consensusparams)
{
- unsigned int flags = SCRIPT_VERIFY_NONE;
-
// BIP16 didn't become active until Apr 1 2012 (on mainnet, and
// retroactively applied to testnet)
// However, only one historical block violated the P2SH rules (on both
- // mainnet and testnet), so for simplicity, always leave P2SH
- // on except for the one violating block.
- if (consensusparams.BIP16Exception.IsNull() || // no bip16 exception on this chain
- *Assert(block_index.phashBlock) != consensusparams.BIP16Exception) // this block isn't the historical exception
- {
- // Enforce WITNESS rules whenever P2SH is in effect
- flags |= SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS;
+ // mainnet and testnet).
+ // Similarly, only one historical block violated the TAPROOT rules on
+ // mainnet.
+ // For simplicity, always leave P2SH+WITNESS+TAPROOT on except for the two
+ // violating blocks.
+ uint32_t flags{SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_TAPROOT};
+ const auto it{consensusparams.script_flag_exceptions.find(*Assert(block_index.phashBlock))};
+ if (it != consensusparams.script_flag_exceptions.end()) {
+ flags = it->second;
}
// Enforce the DERSIG (BIP66) rule
@@ -1610,11 +1610,6 @@ static unsigned int GetBlockScriptFlags(const CBlockIndex& block_index, const Co
flags |= SCRIPT_VERIFY_CHECKSEQUENCEVERIFY;
}
- // Enforce Taproot (BIP340-BIP342)
- if (DeploymentActiveAt(block_index, consensusparams, Consensus::DEPLOYMENT_TAPROOT)) {
- flags |= SCRIPT_VERIFY_TAPROOT;
- }
-
// Enforce BIP147 NULLDUMMY (activated simultaneously with segwit)
if (DeploymentActiveAt(block_index, consensusparams, Consensus::DEPLOYMENT_SEGWIT)) {
flags |= SCRIPT_VERIFY_NULLDUMMY;
diff --git a/test/functional/feature_taproot.py b/test/functional/feature_taproot.py
index e9da6edaf6..1da48b77a6 100755
--- a/test/functional/feature_taproot.py
+++ b/test/functional/feature_taproot.py
@@ -1181,15 +1181,11 @@ def spenders_taproot_inactive():
]
tap = taproot_construct(pub, scripts)
- # Test that keypath spending is valid & non-standard, regardless of validity.
+ # Test that valid spending is standard.
add_spender(spenders, "inactive/keypath_valid", key=sec, tap=tap, standard=Standard.V23)
- add_spender(spenders, "inactive/keypath_invalidsig", key=sec, tap=tap, standard=False, sighash=bitflipper(default_sighash))
- add_spender(spenders, "inactive/keypath_empty", key=sec, tap=tap, standard=False, witness=[])
-
- # Same for scriptpath spending (and features like annex, leaf versions, or OP_SUCCESS don't change this)
add_spender(spenders, "inactive/scriptpath_valid", key=sec, tap=tap, leaf="pk", standard=Standard.V23, inputs=[getter("sign")])
- add_spender(spenders, "inactive/scriptpath_invalidsig", key=sec, tap=tap, leaf="pk", standard=False, inputs=[getter("sign")], sighash=bitflipper(default_sighash))
- add_spender(spenders, "inactive/scriptpath_invalidcb", key=sec, tap=tap, leaf="pk", standard=False, inputs=[getter("sign")], controlblock=bitflipper(default_controlblock))
+
+ # Test that features like annex, leaf versions, or OP_SUCCESS are valid but non-standard
add_spender(spenders, "inactive/scriptpath_valid_unkleaf", key=sec, tap=tap, leaf="future_leaf", standard=False, inputs=[getter("sign")])
add_spender(spenders, "inactive/scriptpath_invalid_unkleaf", key=sec, tap=tap, leaf="future_leaf", standard=False, inputs=[getter("sign")], sighash=bitflipper(default_sighash))
add_spender(spenders, "inactive/scriptpath_valid_opsuccess", key=sec, tap=tap, leaf="op_success", standard=False, inputs=[getter("sign")])
generated by cgit v1.2.3 (git 2.26.2) at 2024-08-20 15:13:29 +0000