feat: quorums work with a single member #6533
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…code, remove TODO to create evo nodes without IS
…ra blocks It also remove custom helper
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WalkthroughThe pull request introduces comprehensive modifications to the Dash blockchain's Long Living Masternode Quorums (LLMQs) implementation, with a specific focus on supporting single-node quorum scenarios. The changes span multiple source files across the project, including core consensus parameters, DKG (Distributed Key Generation) session handling, signature management, RPC interfaces, and functional testing. The modifications enhance the system's capability to handle quorums with a single member, introducing new methods and conditional logic to support this edge case. This includes updates to verification processes, signature creation and recovery mechanisms, and the addition of specific test cases to validate the new functionality. The changes ensure that single-node quorums can be created, signed, and processed correctly while maintaining the existing multi-node quorum infrastructure. The modifications touch various components of the blockchain system, demonstrating a holistic approach to implementing support for single-node quorum scenarios across different layers of the implementation. Thank you for using CodeRabbit. We offer it for free to the OSS community and would appreciate your support in helping us grow. If you find it useful, would you consider giving us a shout-out on your favorite social media? 🪧 TipsChatThere are 3 ways to chat with CodeRabbit:
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Actionable comments posted: 3
🧹 Nitpick comments (6)
src/llmq/options.cpp (1)
157-159: Avoid hardcoding activation heights for testnet quorumsThe activation height for
LLMQ_25_67is hardcoded with a temporary activation constant:// TODO: remove it in case of testnet reset case Consensus::LLMQType::LLMQ_25_67: return pindexPrev->nHeight >= TESTNET_LLMQ_25_67_ACTIVATION_HEIGHT;Consider referencing a consensus parameter or configuration setting instead of a hardcoded value to improve flexibility and maintainability. This change will simplify future updates and prevent potential issues during testnet resets.
test/functional/feature_llmq_singlenode.py (1)
69-72: Simplify return statement incheck_sigsmethodThe
check_sigsmethod uses multipleifstatements to check conditions and returnFalseaccordingly. This can be simplified by directly returning the combined condition:def check_sigs(self, hasrecsigs, isconflicting1, isconflicting2): return has_sig == hasrecsigs and conflicting_1 == isconflicting1 and conflicting_2 == isconflicting2This simplification improves code readability and aligns with Python best practices.
Apply this diff to simplify the method:
- if has_sig != hasrecsigs: - return False - if conflicting_1 != isconflicting1: - return False - if conflicting_2 != isconflicting2: - return False - - return True + return has_sig == hasrecsigs and conflicting_1 == isconflicting1 and conflicting_2 == isconflicting2🧰 Tools
🪛 Ruff (0.8.2)
69-72: Return the condition
not conflicting_2 != isconflicting2directlyReplace with
return not conflicting_2 != isconflicting2(SIM103)
src/llmq/dkgsessionhandler.cpp (1)
552-562: Consider enhancing error handling for null commitments.The implementation correctly handles single-member quorums, but the error handling for null commitments could be more explicit. Consider adding debug logging when the commitment is null to help diagnose issues.
if (params.size == 1) { LogPrint(BCLog::LLMQ_DKG, "CDKGSessionManager::%s -- %s qi[%d] h=%s - finalize-single-commitment \n", __func__, params.name, quorumIndex, quorumHash.ToString()); auto finalCommitment = curSession->FinalizeSingleCommitment(); if (!finalCommitment.IsNull()) { // it can be null only if we are not member if (auto inv_opt = quorumBlockProcessor.AddMineableCommitment(finalCommitment); inv_opt.has_value()) { peerman.RelayInv(inv_opt.value()); } + } else { + LogPrint(BCLog::LLMQ_DKG, "CDKGSessionManager::%s -- %s qi[%d] h=%s - null commitment (not a member)\n", + __func__, params.name, quorumIndex, quorumHash.ToString()); } WaitForNextPhase(QuorumPhase::Initialized, QuorumPhase::Contribute, curQuorumHash); return; }src/llmq/dkgsession.cpp (1)
169-170: Verify the assertion's correctness.The assertion prevents single-node quorums from reaching the contribution phase, which is correct since they don't need DKG. However, the comment could be more descriptive.
- assert(params.threshold > 1); // we should not get there with single-node-quorums + assert(params.threshold > 1); // Single-node quorums bypass DKG and use direct signing insteadsrc/llmq/signing_shares.cpp (2)
781-795: Improve single-node signature recovery logging.The log message is too long and should be split into multiple lines for better readability.
- LogPrint(BCLog::LLMQ_SIGS, "CSigSharesManager::%s -- impossible to recover single-node signature - no shares yet. id=%s, msgHash=%s\n", __func__, - id.ToString(), msgHash.ToString()); + LogPrint(BCLog::LLMQ_SIGS, "CSigSharesManager::%s -- impossible to recover single-node signature - no shares yet.\n" + " id=%s\n" + " msgHash=%s\n", + __func__, id.ToString(), msgHash.ToString());
1543-1571: Review single-node signature creation.The implementation has a TODO regarding signing with operator key instead of quorum key.
Consider implementing proper quorum key signing in a follow-up PR to replace the temporary operator key workaround.
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📒 Files selected for processing (14)
src/chainparams.cpp(3 hunks)src/llmq/commitment.cpp(3 hunks)src/llmq/dkgsession.cpp(4 hunks)src/llmq/dkgsession.h(1 hunks)src/llmq/dkgsessionhandler.cpp(1 hunks)src/llmq/options.cpp(1 hunks)src/llmq/params.h(1 hunks)src/llmq/quorums.cpp(1 hunks)src/llmq/signing_shares.cpp(2 hunks)src/rpc/quorums.cpp(4 hunks)test/functional/feature_dip4_coinbasemerkleroots.py(1 hunks)test/functional/feature_llmq_singlenode.py(1 hunks)test/functional/test_framework/test_framework.py(3 hunks)test/functional/test_runner.py(1 hunks)
✅ Files skipped from review due to trivial changes (1)
- src/llmq/params.h
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🪛 GitHub Actions: Clang Diff Format Check
src/llmq/dkgsessionhandler.cpp
[warning] 550-550: Line exceeds formatting standards. Long log print statement needs to be split into multiple lines.
src/llmq/commitment.cpp
[warning] 131-131: Line exceeds formatting standards. Long log print statement needs to be split into multiple lines.
[warning] 169-169: Line exceeds formatting standards. Long log print statement needs to be split into multiple lines.
src/llmq/dkgsession.cpp
[warning] 1326-1329: Line exceeds formatting standards. Long version assignment statement needs to be split into multiple lines.
src/llmq/signing_shares.cpp
[warning] 780-783: Line exceeds formatting standards. Long log print statement needs to be split into multiple lines.
src/rpc/quorums.cpp
[warning] 179-179: Line exceeds formatting standards. Long function declaration needs to be split into multiple lines.
🪛 Ruff (0.8.2)
test/functional/feature_llmq_singlenode.py
69-72: Return the condition not conflicting_2 != isconflicting2 directly
Replace with return not conflicting_2 != isconflicting2
(SIM103)
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🔇 Additional comments (13)
test/functional/test_framework/test_framework.py (1)
Line range hint
1201-1212: LGTM! The changes improve test flexibility by adding controlled activation speeds.The addition of the
slow_modeparameter with a default value ofTrueallows tests to control the batch size of block generation during softfork activation. This is particularly useful for:
- Faster test execution when slow_mode=False (50 blocks per batch)
- More granular testing when slow_mode=True (10 blocks per batch)
test/functional/feature_dip4_coinbasemerkleroots.py (1)
271-273: LGTM! The changes improve code maintainability and observability.The replacement of the custom
activate_dip8method with the genericactivate_by_namemethod:
- Reduces code duplication
- Provides consistent activation behavior across different DIPs
- Improves test observability with additional logging
src/rpc/quorums.cpp (3)
252-253: Handle invalid LLMQ types gracefullyThe check for
llmq_opt.has_value()correctly handles invalid LLMQ types. Throwing aJSONRPCErrorwith "invalid LLMQ type" provides clear feedback to the caller.
213-219: Verify public key share assignment for single-node quorumsIn the case of a single-node quorum, the public key share is assigned using the operator's public key:
mo.pushKV("pubKeyShare", dmn->pdmnState->pubKeyOperator.ToString());Ensure that using the operator's public key as the
pubKeyShareis appropriate and that this aligns with the expected behavior for single-node quorums.✅ Verification successful
Using operator's public key as pubKeyShare in single-node quorums is appropriate
The implementation is cryptographically sound as the operator's public key (pubKeyOperator) is already a BLS key used for verification in the system, and in a single-node quorum scenario, using it directly as the pubKeyShare maintains the required security properties while appropriately simplifying the protocol for the single-participant case.
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash # Search for single_node_quorum usage and context rg "single_node_quorum" -B 2 -A 2 # Search for documentation or comments about quorum public keys rg -i "quorum.*public.*key.*share" -B 2 -A 2 # Search for test cases related to single node quorums fd "test.*cpp" --exec rg "single.*node.*quorum" {} \; # Look for similar patterns of pubKeyOperator usage rg "pubKeyOperator" -B 2 -A 2Length of output: 49859
Script:
#!/bin/bash # Search for documentation or comments about pubKeyShare rg -i "pubKeyShare.*" -B 3 -A 3 # Look for quorum-specific implementations ast-grep --pattern 'GetPubKeyShare($$$)'Length of output: 7706
268-268: Confirm the condition for single-node quorum determinationThe condition
llmq_opt->size == 1is used to determine if the quorum is a single-node quorum:return BuildQuorumInfo(*llmq_ctx.quorum_block_processor, quorum, true, includeSkShare, llmq_opt->size == 1);Verify that using
llmq_opt->size == 1reliably identifies single-node quorums in all scenarios, especially considering any future changes to LLMQ configurations.✅ Verification successful
Using
llmq_opt->size == 1is a reliable way to identify single-node quorumsThe codebase consistently uses the size parameter to identify single-node quorums across critical components like signing, DKG sessions, and RPC interfaces. This check is intentionally designed into the system and is reliable for determining single-node quorums.
🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash # Search for LLMQ configuration definitions and size usage ast-grep --pattern 'Params.LLMQ_$_' rg -A 5 "LLMQ_" src/ rg -l "single.*node.*quorum" --type cpp --type md rg "size.*=.*1" src/ --type cppLength of output: 69842
Script:
#!/bin/bash # Look for documentation and code related to single-node quorums rg -B 2 -A 2 "single.?node" --type cpp --type md rg -B 2 -A 2 "size\s*=\s*1" --type cpp --type md rg -B 2 -A 2 "SetQuorumSize" --type cppLength of output: 13684
test/functional/feature_llmq_singlenode.py (1)
115-115: Confirm intentional use ofmsgHashasquorumHashin testIn the test case:
assert not self.mninfo[1].node.quorum("sign", q_type, id, msgHash, msgHash)You are passing
msgHashas thequorumHashparameter to intentionally provide an invalid quorum hash. Confirm that this is the desired approach to test error handling for invalid quorum hashes. If so, consider adding a comment to clarify this for future readers.✅ Verification successful
Intentional test case for invalid quorum hash validation
The test is correctly using
msgHashas an invalidquorumHashparameter to verify error handling. This is explicitly documented in the test comment "Providing an invalid quorum hash should fail" and is followed by a proper test case using a valid quorum hash. The assertionassert notcorrectly expects the operation to fail.🏁 Scripts executed
The following scripts were executed for the analysis:
Error: No shell scripts found
Script:
#!/bin/bash # Get the test context cat test/functional/feature_llmq_singlenode.py # Find other quorum sign usages rg "quorum.*sign" -A 3 -B 3Length of output: 66068
src/llmq/commitment.cpp (2)
73-76: LGTM! Conditional check for quorumVvecHash.The modification correctly bypasses the quorumVvecHash verification for single-member quorums while maintaining the check for multi-member quorums.
118-136: LGTM! Optimized signature verification for single-member quorums.The implementation correctly handles both cases:
- For single-member quorums: Uses direct signature verification
- For multi-member quorums: Uses aggregated signature verification
The logging of the operator's public key aids in debugging.
🧰 Tools
🪛 GitHub Actions: Clang Diff Format Check
[warning] 131-131: Line exceeds formatting standards. Long log print statement needs to be split into multiple lines.
src/llmq/dkgsession.h (1)
385-387: LGTM! Clean method declaration for single-member commitment.The
FinalizeSingleCommitment()method declaration is well-placed and follows the class's style conventions. The comment accurately describes its purpose.test/functional/test_runner.py (1)
137-137: LGTM! Test script addition follows conventions.The new test script is correctly added to BASE_SCRIPTS with appropriate dependency note.
src/llmq/quorums.cpp (1)
417-422: LGTM: Efficient caching for single-node quorums.The implementation correctly optimizes single-node quorums by caching them immediately, skipping unnecessary contribution building steps.
src/chainparams.cpp (2)
1153-1163: LGTM: Clean test platform quorum parameter handling.The implementation correctly adds support for configuring test platform quorum parameters while maintaining consistency with existing parameter handling.
1392-1392: LGTM: Added command line argument for test platform quorum parameters.The new argument follows the existing pattern and is properly documented.
src/llmq/dkgsession.cpp
Outdated
| CFinalCommitment CDKGSession::FinalizeSingleCommitment() | ||
| { | ||
| if (!AreWeMember()) { | ||
| return {}; | ||
| } | ||
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| CDKGLogger logger(*this, __func__, __LINE__); | ||
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| std::vector<CBLSId> signerIds; | ||
| std::vector<CBLSSignature> thresholdSigs; | ||
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| CFinalCommitment fqc(params, m_quorum_base_block_index->GetBlockHash()); | ||
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| fqc.signers = {true}; | ||
| fqc.validMembers = {true}; | ||
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| CBLSSecretKey sk1; | ||
| sk1.MakeNewKey(); | ||
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| fqc.quorumPublicKey = sk1.GetPublicKey(); | ||
| fqc.quorumVvecHash = {}; | ||
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| // use just MN's operator public key as quorum pubkey. | ||
| // TODO: use sk1 here instead and use recovery mechanism from shares, but that's not trivial to do | ||
| const bool workaround_qpublic_key = true; | ||
| if (workaround_qpublic_key) { | ||
| fqc.quorumPublicKey = m_mn_activeman->GetPubKey(); | ||
| } | ||
| const bool isQuorumRotationEnabled{false}; | ||
| fqc.nVersion = CFinalCommitment::GetVersion(isQuorumRotationEnabled, DeploymentActiveAfter(m_quorum_base_block_index, Params().GetConsensus(), Consensus::DEPLOYMENT_V19)); | ||
| fqc.quorumIndex = 0; | ||
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| uint256 commitmentHash = BuildCommitmentHash(fqc.llmqType, fqc.quorumHash, fqc.validMembers, fqc.quorumPublicKey, fqc.quorumVvecHash); | ||
| fqc.quorumSig = sk1.Sign(commitmentHash, m_use_legacy_bls); | ||
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| fqc.membersSig = m_mn_activeman->Sign(commitmentHash, m_use_legacy_bls); | ||
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| if (workaround_qpublic_key) { | ||
| fqc.quorumSig = fqc.membersSig; | ||
| } | ||
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| if (!fqc.Verify(m_dmnman, m_qsnapman, m_quorum_base_block_index, true)) { | ||
| logger.Batch("failed to verify final commitment"); | ||
| assert(false); | ||
| } | ||
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| logger.Batch("final commitment: validMembers=%d, signers=%d, quorumPublicKey=%s", | ||
| fqc.CountValidMembers(), fqc.CountSigners(), fqc.quorumPublicKey.ToString()); | ||
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| return fqc; | ||
| } |
There was a problem hiding this comment.
Review the single commitment finalization implementation.
The implementation has several concerns:
- Using operator's public key as quorum public key is a temporary workaround
- The verification step uses an assertion which could crash in production
- The error handling could be improved
Suggested improvements:
- Replace the assertion with proper error handling:
- assert(false);
+ return CFinalCommitment(); // Return empty commitment on verification failure- Consider implementing proper key generation instead of using the workaround:
- // TODO: use sk1 here instead and use recovery mechanism from shares, but that's not trivial to do
- const bool workaround_qpublic_key = true;
- if (workaround_qpublic_key) {
- fqc.quorumPublicKey = m_mn_activeman->GetPubKey();
- }
+ // Generate and use a proper quorum key
+ fqc.quorumPublicKey = sk1.GetPublicKey();Committable suggestion skipped: line range outside the PR's diff.
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[warning] 1326-1329: Line exceeds formatting standards. Long version assignment statement needs to be split into multiple lines.
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Actionable comments posted: 1
🧹 Nitpick comments (5)
test/functional/feature_llmq_singlenode.py (1)
9-10: Fix typo in docstring commentThe docstring contains a typo: "signle" should be "single".
-Checks creating LLMQs signle node quorum creation and signing +Checks creating LLMQs single node quorum creation and signingsrc/llmq/dkgsession.cpp (1)
169-170: Verify assertion condition for single-node quorumsThe assertion prevents multi-node quorums from using the single-node path, but it might be clearer to explicitly check for single-node quorums.
-assert(params.threshold > 1); // we should not get there with single-node-quorums +// Ensure we don't enter this path for single-node quorums +assert(params.size > 1 && params.threshold > 1);src/llmq/signing_shares.cpp (1)
781-795: Improve single-node signature recovery implementationThe single-node signature recovery logic is correct but could be more concise and clearer.
if (quorum->params.size == 1) { - if (sigSharesForSignHash->empty()) { - LogPrint(BCLog::LLMQ_SIGS, "CSigSharesManager::%s -- impossible to recover single-node signature - no shares yet. id=%s, msgHash=%s\n", __func__, - id.ToString(), msgHash.ToString()); - return; - } - const auto& sigShare = sigSharesForSignHash->begin()->second; - CBLSSignature recoveredSig = sigShare.sigShare.Get(); - LogPrint(BCLog::LLMQ_SIGS, "CSigSharesManager::%s -- recover single-node signature. id=%s, msgHash=%s\n", __func__, - id.ToString(), msgHash.ToString()); + if (const auto it = sigSharesForSignHash->begin(); it != sigSharesForSignHash->end()) { + CBLSSignature recoveredSig = it->second.sigShare.Get(); + LogPrint(BCLog::LLMQ_SIGS, "CSigSharesManager::%s -- recover single-node signature. id=%s, msgHash=%s\n", __func__, + id.ToString(), msgHash.ToString()); + auto rs = std::make_shared<CRecoveredSig>(quorum->params.type, quorum->qc->quorumHash, id, msgHash, recoveredSig); + sigman.ProcessRecoveredSig(rs, peerman); + } + return; +}src/llmq/quorums.cpp (2)
417-422: LGTM! Efficient optimization for single-node quorums.The optimization path for single-node quorums improves performance by bypassing unnecessary DKG steps and disk I/O operations. The implementation is thread-safe and follows existing patterns.
Consider adding a brief comment explaining the optimization for single-node quorums:
+ // Optimize single-node quorums by bypassing DKG steps and disk I/O if (populate_cache && llmq_params_opt->size == 1) { WITH_LOCK(cs_map_quorums, mapQuorumsCache[llmqType].insert(quorumHash, quorum)); return quorum; }
417-422: Well-designed architectural changes for single-node quorums.The implementation elegantly introduces single-node quorum optimization while:
- Maintaining backward compatibility
- Not affecting existing multi-node quorum paths
- Following the principle of least surprise
- Being properly tested
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📒 Files selected for processing (12)
src/chainparams.cpp(3 hunks)src/llmq/commitment.cpp(3 hunks)src/llmq/dkgsession.cpp(4 hunks)src/llmq/dkgsession.h(1 hunks)src/llmq/dkgsessionhandler.cpp(1 hunks)src/llmq/params.h(1 hunks)src/llmq/quorums.cpp(1 hunks)src/llmq/signing_shares.cpp(2 hunks)src/rpc/quorums.cpp(4 hunks)test/functional/feature_llmq_singlenode.py(1 hunks)test/functional/test_framework/test_framework.py(3 hunks)test/functional/test_runner.py(1 hunks)
🚧 Files skipped from review as they are similar to previous changes (6)
- src/llmq/params.h
- src/llmq/commitment.cpp
- test/functional/test_runner.py
- src/llmq/dkgsession.h
- src/llmq/dkgsessionhandler.cpp
- src/chainparams.cpp
🧰 Additional context used
🪛 GitHub Actions: Clang Diff Format Check
src/llmq/dkgsession.cpp
[warning] 1326-1329: Line needs proper formatting and indentation adjustment
[warning] 1343-1346: Log statement needs proper line wrapping and formatting
src/llmq/signing_shares.cpp
[warning] 780-783: Log print statement needs proper line wrapping and formatting
[warning] 1555-1558: Log print statement requires proper formatting and line breaks
src/rpc/quorums.cpp
[warning] 179-179: Function declaration needs proper line wrapping and formatting
🪛 Ruff (0.8.2)
test/functional/feature_llmq_singlenode.py
69-72: Return the condition not conflicting_2 != isconflicting2 directly
Replace with return not conflicting_2 != isconflicting2
(SIM103)
⏰ Context from checks skipped due to timeout of 90000ms (2)
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🔇 Additional comments (7)
test/functional/test_framework/test_framework.py (2)
1201-1201: LGTM! Clear and backward-compatible parameter addition.The new
slow_modeparameter with a default value ofTruemaintains backward compatibility while providing control over the block generation speed.
Line range hint
1212-1254: LGTM! Well-implemented batch size control.The conditional batch size (50 or 10 blocks) based on
slow_modeprovides:
- More granular testing when needed (slow_mode=True)
- Faster test execution when granularity isn't required (slow_mode=False)
The implementation maintains test correctness while adding flexibility in execution speed.
test/functional/feature_llmq_singlenode.py (1)
176-176: Investigate issue preventing ChainLocks and InstantSend after logging connectionsThe TODO comment indicates an issue where ChainLocks (CL) and InstantSend (IS) are no longer formed after logging connections. This suggests a side-effect that may interfere with network messaging or state.
Do you want me to help identify the root cause and suggest a fix for this issue?
src/llmq/dkgsession.cpp (1)
1299-1352:⚠️ Potential issueReview single commitment finalization implementation
The implementation has several concerns:
- Using operator's public key as quorum public key is a temporary workaround
- The verification step uses an assertion which could crash in production
- The error handling could be improved
Suggested improvements:
- Replace the assertion with proper error handling:
- assert(false); + return CFinalCommitment(); // Return empty commitment on verification failure
- Consider implementing proper key generation instead of the workaround:
- // TODO: use sk1 here instead and use recovery mechanism from shares, but that's not trivial to do - const bool workaround_qpublic_key = true; - if (workaround_qpublic_key) { - fqc.quorumPublicKey = m_mn_activeman->GetPubKey(); - } + // Generate and use a proper quorum key + fqc.quorumPublicKey = sk1.GetPublicKey();Likely invalid or redundant comment.
🧰 Tools
🪛 GitHub Actions: Clang Diff Format Check
[warning] 1326-1329: Line needs proper formatting and indentation adjustment
[warning] 1343-1346: Log statement needs proper line wrapping and formatting
src/rpc/quorums.cpp (2)
182-182: Conform to formatting standards: Split long function declarationThe function declaration exceeds the line length standards as indicated by the pipeline failure logs. Splitting the parameters into multiple lines improves readability and conforms to the project's formatting guidelines.
Apply this diff to fix the formatting:
-static UniValue BuildQuorumInfo(const llmq::CQuorumBlockProcessor& quorum_block_processor, const llmq::CQuorumCPtr& quorum, bool includeMembers, bool includeSkShare, bool single_node_quorum = false) +static UniValue BuildQuorumInfo( + const llmq::CQuorumBlockProcessor& quorum_block_processor, + const llmq::CQuorumCPtr& quorum, + bool includeMembers, + bool includeSkShare, + bool single_node_quorum = false)
213-219: Verify single-node quorum member key handlingThe code uses operator's public key for single-node quorums, which matches the workaround in
FinalizeSingleCommitment. This should be updated when proper key generation is implemented.Run this script to verify the consistency of this workaround across the codebase:
✅ Verification successful
Review comment verified - single-node quorum key handling is a documented workaround
The codebase confirms that using operator's public key for single-node quorums is a deliberate workaround. This is explicitly documented in
FinalizeSingleCommitment()with a TODO noting it should be replaced with proper key generation and share recovery mechanism. The handling is consistent across the codebase.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check for consistent handling of single-node quorum keys # Expect: Only these two occurrences of using operator's public key rg -A 5 "pubKeyOperator"Length of output: 53102
Script:
#!/bin/bash # Search for FinalizeSingleCommitment implementation and single_node_quorum usage ast-grep --pattern 'FinalizeSingleCommitment($$$)' rg -A 5 "single_node_quorum"Length of output: 3397
Script:
#!/bin/bash # Search for LLMQ commitment implementations and single node handling fd -e cpp -e h . src/llmq | xargs rg -l "Commitment|commitment|single.*quorum" rg -A 5 "FinalizeSingleCommitment|single.*quorum" src/llmq/Length of output: 4525
Script:
#!/bin/bash # Get the full implementation of FinalizeSingleCommitment rg -B 5 -A 30 "^CFinalCommitment CDKGSession::FinalizeSingleCommitment" src/llmq/dkgsession.cppLength of output: 1183
src/llmq/quorums.cpp (1)
417-422: Verify safety constraints for single-node optimization.Please ensure that this optimization is properly constrained to test quorums (
llmq_testandllmq_test_instantsend) to prevent accidental usage in production quorums.Let's verify the LLMQ parameter definitions:
✅ Verification successful
Single-node quorum optimization is properly constrained to test environments
The optimization is safe because:
- Default quorum sizes are > 1 (test quorums: 3-4 nodes, production: 25-400 nodes)
- Single-node configuration is only possible via debug parameters (-llmqtestparams) in regtest mode
- Code properly handles size=1 cases with appropriate validation
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check LLMQ parameter definitions to ensure single-node quorums are properly constrained # Expected: Only test quorums should allow size=1 # Search for LLMQ parameter definitions rg -A 5 "LLMQ.*size.*=.*1"Length of output: 28
Script:
#!/bin/bash # Try different patterns to locate LLMQ parameter definitions echo "=== Searching for LLMQ parameter definitions ===" rg -B 2 -A 5 "Llmq.*Params" src/ echo "=== Searching for test quorum configurations ===" rg -B 2 -A 5 "llmq.*test" src/ echo "=== Searching for size parameter in quorum context ===" rg -B 2 -A 5 "size\s*=|size:" src/llmq/Length of output: 23225
src/llmq/signing_shares.cpp
Outdated
| if (quorum->params.size == 1) { | ||
| int memberIdx = quorum->GetMemberIndex(activeMasterNodeProTxHash); | ||
| if (memberIdx == -1) { | ||
| // this should really not happen (IsValidMember gave true) | ||
| return std::nullopt; | ||
| } | ||
|
|
||
| CSigShare sigShare(quorum->params.type, quorum->qc->quorumHash, id, msgHash, uint16_t(memberIdx), {}); | ||
| uint256 signHash = sigShare.buildSignHash(); | ||
|
|
||
| // TODO: This one should be SIGN by QUORUM key, not by OPERATOR key | ||
| // see TODO in CDKGSession::FinalizeSingleCommitment for details | ||
| sigShare.sigShare.Set(m_mn_activeman->Sign(signHash, bls::bls_legacy_scheme.load()), bls::bls_legacy_scheme.load()); | ||
|
|
||
| if (!sigShare.sigShare.Get().IsValid()) { | ||
| LogPrintf("CSigSharesManager::%s -- failed to sign sigShare. signHash=%s, id=%s, msgHash=%s, time=%s\n", __func__, | ||
| signHash.ToString(), sigShare.getId().ToString(), sigShare.getMsgHash().ToString(), t.count()); | ||
| return std::nullopt; | ||
| } | ||
|
|
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| sigShare.UpdateKey(); | ||
|
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||
| LogPrint(BCLog::LLMQ_SIGS, "CSigSharesManager::%s -- created sigShare. signHash=%s, id=%s, msgHash=%s, llmqType=%d, quorum=%s, time=%s\n", __func__, | ||
| signHash.ToString(), sigShare.getId().ToString(), sigShare.getMsgHash().ToString(), ToUnderlying(quorum->params.type), quorum->qc->quorumHash.ToString(), t.count()); | ||
|
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||
| return sigShare; | ||
|
|
||
|
|
||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Review single-node signature creation implementation
The implementation has several issues:
- Uses operator's key instead of quorum key (as noted in TODO)
- Duplicates error handling logic from multi-node case
- Could be more concise
Suggested improvements:
- Extract common error handling:
+bool CSigSharesManager::CreateAndValidateSigShare(const CQuorumCPtr& quorum, const uint256& signHash,
+ CBLSSecretKey& signingKey, CSigShare& sigShare) const
+{
+ sigShare.sigShare.Set(signingKey.Sign(signHash, bls::bls_legacy_scheme.load()), bls::bls_legacy_scheme.load());
+ if (!sigShare.sigShare.Get().IsValid()) {
+ LogPrintf("CSigSharesManager::%s -- failed to sign sigShare. signHash=%s, id=%s, msgHash=%s\n", __func__,
+ signHash.ToString(), sigShare.getId().ToString(), sigShare.getMsgHash().ToString());
+ return false;
+ }
+ return true;
+}- Simplify single-node case:
if (quorum->params.size == 1) {
int memberIdx = quorum->GetMemberIndex(activeMasterNodeProTxHash);
- if (memberIdx == -1) {
- // this should really not happen (IsValidMember gave true)
- return std::nullopt;
- }
+ assert(memberIdx != -1); // IsValidMember already checked this
CSigShare sigShare(quorum->params.type, quorum->qc->quorumHash, id, msgHash, uint16_t(memberIdx), {});
uint256 signHash = sigShare.buildSignHash();
// TODO: This one should be SIGN by QUORUM key, not by OPERATOR key
- sigShare.sigShare.Set(m_mn_activeman->Sign(signHash, bls::bls_legacy_scheme.load()), bls::bls_legacy_scheme.load());
- if (!sigShare.sigShare.Get().IsValid()) {
- LogPrintf("CSigSharesManager::%s -- failed to sign sigShare. signHash=%s, id=%s, msgHash=%s\n", __func__,
- signHash.ToString(), sigShare.getId().ToString(), sigShare.getMsgHash().ToString());
- return std::nullopt;
+ CBLSSecretKey signingKey = m_mn_activeman->GetOperatorKey();
+ if (!CreateAndValidateSigShare(quorum, signHash, signingKey, sigShare)) {
+ return std::nullopt;
}
sigShare.UpdateKey();
return sigShare;
}Committable suggestion skipped: line range outside the PR's diff.
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Guix Automation has completed; a release should be present here: https://github.com/dashpay/dash-dev-branches/releases/tag/v22.1.0-devpr6533.a4f35825. The image should be on dockerhub soon. |
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Guix Automation has began to build this PR tagged as v22.1.0-devpr6533.f194acab. A new comment will be made when the image is pushed. |
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Guix Automation has completed; a release should be present here: https://github.com/dashpay/dash-dev-branches/releases/tag/v22.1.0-devpr6533.f194acab. The image should be on dockerhub soon. |
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force-pushed to fix multiple intermittent errors in a new functional test. |
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Actionable comments posted: 4
🧹 Nitpick comments (4)
test/functional/feature_llmq_singlenode.py (3)
9-9: Fix typo in docstring commentThe word "signle" is misspelled in the docstring.
-Checks creating LLMQs signle node quorum creation and signing +Checks creating LLMQs single node quorum creation and signing
34-36: Consider using constants for magic numbersThe test parameters use magic numbers (1, 0, 1, 1) which could be made more maintainable by using named constants.
+MASTERNODE_COUNT = 1 +INITIAL_NODES = 0 +EVO_COUNT = 2 +LLMQ_TEST_PARAMS = (1, 1) - self.set_dash_test_params(1, 0, [["-llmqtestinstantsenddip0024=llmq_test_instantsend", "-peertimeout=300000000"]], - evo_count=2) - self.set_dash_llmq_test_params(1, 1) + self.set_dash_test_params(MASTERNODE_COUNT, INITIAL_NODES, + [["-llmqtestinstantsenddip0024=llmq_test_instantsend", "-peertimeout=300000000"]], + evo_count=EVO_COUNT) + self.set_dash_llmq_test_params(*LLMQ_TEST_PARAMS)
166-167: Add comment explaining TODOThe TODO comment lacks context about the issue it's addressing.
- # TODO: somehow nodes here logs connections and no more CL / IS are formed + # TODO: Investigate why logging connections at this point prevents ChainLocks (CL) + # and InstantSend (IS) from being formed. This might be related to network + # messaging or connection state changes during logging.src/llmq/signing_shares.cpp (1)
1555-1558: Fix log statement formatting.The log statement needs proper line wrapping and formatting according to the pipeline failure.
Apply this formatting:
- LogPrintf("CSigSharesManager::%s -- failed to sign sigShare. signHash=%s, id=%s, msgHash=%s, time=%s\n", __func__, - signHash.ToString(), sigShare.getId().ToString(), sigShare.getMsgHash().ToString(), t.count()); + LogPrintf("CSigSharesManager::%s -- failed to sign sigShare. signHash=%s, id=%s, msgHash=%s, time=%s\n", + __func__, signHash.ToString(), sigShare.getId().ToString(), + sigShare.getMsgHash().ToString(), t.count());🧰 Tools
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📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (12)
src/chainparams.cpp(3 hunks)src/llmq/commitment.cpp(3 hunks)src/llmq/dkgsession.cpp(4 hunks)src/llmq/dkgsession.h(1 hunks)src/llmq/dkgsessionhandler.cpp(1 hunks)src/llmq/params.h(1 hunks)src/llmq/quorums.cpp(1 hunks)src/llmq/signing_shares.cpp(2 hunks)src/rpc/quorums.cpp(4 hunks)test/functional/feature_llmq_singlenode.py(1 hunks)test/functional/test_framework/test_framework.py(3 hunks)test/functional/test_runner.py(1 hunks)
🚧 Files skipped from review as they are similar to previous changes (5)
- src/llmq/params.h
- src/llmq/dkgsession.h
- src/llmq/dkgsessionhandler.cpp
- test/functional/test_runner.py
- src/llmq/commitment.cpp
🧰 Additional context used
🪛 GitHub Actions: Clang Diff Format Check
src/llmq/signing_shares.cpp
[warning] 780-783: Log print statement needs proper line wrapping and formatting
[warning] 1555-1558: Log print statement requires proper formatting and line breaks
src/llmq/dkgsession.cpp
[warning] 1326-1329: Line needs proper formatting and indentation adjustment
[warning] 1343-1346: Log statement needs proper line wrapping and formatting
src/rpc/quorums.cpp
[warning] 179-179: Function declaration needs proper line wrapping and formatting
🪛 Ruff (0.8.2)
test/functional/feature_llmq_singlenode.py
21-21: test_framework.util.force_finish_mnsync imported but unused
Remove unused import: test_framework.util.force_finish_mnsync
(F401)
70-73: Return the condition not conflicting_2 != isconflicting2 directly
Replace with return not conflicting_2 != isconflicting2
(SIM103)
⏰ Context from checks skipped due to timeout of 90000ms (2)
- GitHub Check: Build Dependencies (linux64, x86_64-pc-linux-gnu)
- GitHub Check: Build Dependencies (arm-linux, arm-linux-gnueabihf)
🔇 Additional comments (8)
test/functional/test_framework/test_framework.py (1)
Line range hint
1201-1254: LGTM! The slow mode parameter provides better control over mining speed.The changes introduce a
slow_modeparameter to control the batch size during mining for softfork activation. This is a good improvement as it allows:
- Faster testing when
slow_mode=False(batch size of 50)- More granular testing when
slow_mode=True(batch size of 10)The implementation is correct and maintains backward compatibility with the default
slow_mode=True.src/llmq/dkgsession.cpp (2)
1323-1327:⚠️ Potential issueReplace temporary workaround with proper key generation
The current implementation uses a workaround by using the operator's public key instead of implementing proper key generation and recovery from shares.
- // TODO: use sk1 here instead and use recovery mechanism from shares, but that's not trivial to do - const bool workaround_qpublic_key = true; - if (workaround_qpublic_key) { - fqc.quorumPublicKey = m_mn_activeman->GetPubKey(); - } + // Generate and use a proper quorum key + fqc.quorumPublicKey = sk1.GetPublicKey(); + // Implement proper key recovery mechanism from shares + bool success = RecoverKeyFromShares(sk1, shares, fqc.quorumPublicKey); + if (!success) { + logger.Batch("Failed to recover key from shares"); + return CFinalCommitment(); + }Likely invalid or redundant comment.
1341-1344:⚠️ Potential issueReplace assertion with proper error handling
Using assertions in production code can lead to crashes. Replace with proper error handling.
- if (!fqc.Verify(m_dmnman, m_qsnapman, m_quorum_base_block_index, true)) { - logger.Batch("failed to verify final commitment"); - assert(false); - } + if (!fqc.Verify(m_dmnman, m_qsnapman, m_quorum_base_block_index, true)) { + logger.Batch("failed to verify final commitment"); + return CFinalCommitment(); // Return empty commitment on verification failure + }Likely invalid or redundant comment.
src/rpc/quorums.cpp (1)
182-182: 🛠️ Refactor suggestionSplit long function declaration
The function declaration exceeds line length standards. Split parameters into multiple lines for better readability.
-static UniValue BuildQuorumInfo(const llmq::CQuorumBlockProcessor& quorum_block_processor, const llmq::CQuorumCPtr& quorum, bool includeMembers, bool includeSkShare, bool single_node_quorum = false) +static UniValue BuildQuorumInfo( + const llmq::CQuorumBlockProcessor& quorum_block_processor, + const llmq::CQuorumCPtr& quorum, + bool includeMembers, + bool includeSkShare, + bool single_node_quorum = false)Likely invalid or redundant comment.
src/llmq/signing_shares.cpp (2)
781-795: LGTM! Well-implemented single-node signature recovery logic.The implementation correctly handles the special case of single-node quorums by:
- Checking for available shares
- Using the share directly as the recovered signature
- Providing appropriate logging
1543-1571: Security consideration: Using operator key instead of quorum key.While the implementation is functional, using the operator key instead of the quorum key (as noted in the TODO) may have security implications. This should be addressed in a future update to align with the security model of multi-node quorums.
Run the following to verify the impact:
✅ Verification successful
Confirmed: Using operator key is a known technical workaround
The verification confirms this is a deliberate temporary solution acknowledged in multiple places in the codebase. The
FinalizeSingleCommitmentimplementation shows this is a known technical debt, with comments indicating that a proper solution would involve using quorum keys with a recovery mechanism from shares, though that implementation would be non-trivial.
src/llmq/dkgsession.cpp: Uses operator public key as quorum pubkey with explicit workaround flagsrc/llmq/signing_shares.cpp: Uses operator key for signing instead of quorum key🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Search for other instances where operator key is used instead of quorum key rg -A 2 "TODO.*QUORUM key"Length of output: 386
Script:
#!/bin/bash # Search for FinalizeSingleCommitment implementation and context ast-grep --pattern 'FinalizeSingleCommitment($$$) { $$$ }' # Also search for any related comments rg -B 2 -A 5 "FinalizeSingleCommitment"Length of output: 2232
Script:
#!/bin/bash # Get the complete implementation of FinalizeSingleCommitment rg -A 30 "^CFinalCommitment CDKGSession::FinalizeSingleCommitment" # Search for discussions about operator vs quorum key security rg -i "operator.{0,20}key.{0,30}(security|risk)"Length of output: 1896
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[warning] 1555-1558: Log print statement requires proper formatting and line breaks
src/chainparams.cpp (2)
928-928: LGTM! Consistent handling of LLMQ_TEST_PLATFORM parameters.The implementation follows the established pattern for updating LLMQ parameters from command line arguments.
1153-1163: LGTM! Well-structured parameter handling for LLMQ_TEST_PLATFORM.The implementation:
- Properly validates LLMQ types through assertions
- Uses consistent parameter naming
- Follows the established pattern for parameter handling
| skip_count = 24 - (self.nodes[0].getblockcount() % 24) | ||
| if skip_count != 0: | ||
| self.bump_mocktime(1) | ||
| self.generate(self.nodes[0], skip_count) | ||
| time.sleep(1) | ||
| self.generate(self.nodes[0], 30) |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add error handling for skip_count calculation
The skip count calculation lacks error handling for potential edge cases.
- skip_count = 24 - (self.nodes[0].getblockcount() % 24)
- if skip_count != 0:
- self.bump_mocktime(1)
- self.generate(self.nodes[0], skip_count)
+ try:
+ current_block_count = self.nodes[0].getblockcount()
+ if current_block_count < 0:
+ raise ValueError("Invalid block count")
+ skip_count = 24 - (current_block_count % 24)
+ if skip_count != 0:
+ self.bump_mocktime(1)
+ self.generate(self.nodes[0], skip_count)
+ except Exception as e:
+ self.log.error(f"Error calculating skip count: {str(e)}")
+ raise📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| skip_count = 24 - (self.nodes[0].getblockcount() % 24) | |
| if skip_count != 0: | |
| self.bump_mocktime(1) | |
| self.generate(self.nodes[0], skip_count) | |
| time.sleep(1) | |
| self.generate(self.nodes[0], 30) | |
| try: | |
| current_block_count = self.nodes[0].getblockcount() | |
| if current_block_count < 0: | |
| raise ValueError("Invalid block count") | |
| skip_count = 24 - (current_block_count % 24) | |
| if skip_count != 0: | |
| self.bump_mocktime(1) | |
| self.generate(self.nodes[0], skip_count) | |
| except Exception as e: | |
| self.log.error(f"Error calculating skip count: {str(e)}") | |
| raise | |
| time.sleep(1) | |
| self.generate(self.nodes[0], 30) |
| if (single_node_quorum) { | ||
| mo.pushKV("pubKeyShare", dmn->pdmnState->pubKeyOperator.ToString()); | ||
| } else { | ||
| CBLSPublicKey pubKey = quorum->GetPubKeyShare(i); | ||
| if (pubKey.IsValid()) { | ||
| mo.pushKV("pubKeyShare", pubKey.ToString()); | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add validation for single-node quorum public key
The code should validate that the operator's public key is valid before using it in single-node quorums.
if (single_node_quorum) {
- mo.pushKV("pubKeyShare", dmn->pdmnState->pubKeyOperator.ToString());
+ const auto& pubKeyOperator = dmn->pdmnState->pubKeyOperator;
+ if (!pubKeyOperator.IsValid()) {
+ throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid operator public key for single-node quorum");
+ }
+ mo.pushKV("pubKeyShare", pubKeyOperator.ToString());
} else {
CBLSPublicKey pubKey = quorum->GetPubKeyShare(i);
if (pubKey.IsValid()) {
mo.pushKV("pubKeyShare", pubKey.ToString());
}
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| if (single_node_quorum) { | |
| mo.pushKV("pubKeyShare", dmn->pdmnState->pubKeyOperator.ToString()); | |
| } else { | |
| CBLSPublicKey pubKey = quorum->GetPubKeyShare(i); | |
| if (pubKey.IsValid()) { | |
| mo.pushKV("pubKeyShare", pubKey.ToString()); | |
| } | |
| if (single_node_quorum) { | |
| const auto& pubKeyOperator = dmn->pdmnState->pubKeyOperator; | |
| if (!pubKeyOperator.IsValid()) { | |
| throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid operator public key for single-node quorum"); | |
| } | |
| mo.pushKV("pubKeyShare", pubKeyOperator.ToString()); | |
| } else { | |
| CBLSPublicKey pubKey = quorum->GetPubKeyShare(i); | |
| if (pubKey.IsValid()) { | |
| mo.pushKV("pubKeyShare", pubKey.ToString()); | |
| } |
| if (populate_cache && llmq_params_opt->size == 1) { | ||
| WITH_LOCK(cs_map_quorums, mapQuorumsCache[llmqType].insert(quorumHash, quorum)); | ||
|
|
||
| return quorum; | ||
| } | ||
|
|
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add validation before caching single-node quorum
The code should validate the quorum before caching it for single-node quorums.
if (populate_cache && llmq_params_opt->size == 1) {
+ // Validate quorum before caching
+ if (!quorum->qc->IsValidMember(quorum->members[0]->proTxHash)) {
+ LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- Invalid member in single-node quorum\n", __func__);
+ return nullptr;
+ }
+ if (!quorum->qc->quorumPublicKey.IsValid()) {
+ LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- Invalid public key in single-node quorum\n", __func__);
+ return nullptr;
+ }
WITH_LOCK(cs_map_quorums, mapQuorumsCache[llmqType].insert(quorumHash, quorum));
return quorum;
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| if (populate_cache && llmq_params_opt->size == 1) { | |
| WITH_LOCK(cs_map_quorums, mapQuorumsCache[llmqType].insert(quorumHash, quorum)); | |
| return quorum; | |
| } | |
| if (populate_cache && llmq_params_opt->size == 1) { | |
| // Validate quorum before caching | |
| if (!quorum->qc->IsValidMember(quorum->members[0]->proTxHash)) { | |
| LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- Invalid member in single-node quorum\n", __func__); | |
| return nullptr; | |
| } | |
| if (!quorum->qc->quorumPublicKey.IsValid()) { | |
| LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- Invalid public key in single-node quorum\n", __func__); | |
| return nullptr; | |
| } | |
| WITH_LOCK(cs_map_quorums, mapQuorumsCache[llmqType].insert(quorumHash, quorum)); | |
| return quorum; | |
| } |
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Guix Automation has completed; a release should be present here: https://github.com/dashpay/dash-dev-branches/releases/tag/v22.1.0-devpr6533.b0689983. The image should be on dockerhub soon. |
Issue being fixed or feature implemented
Development for platform requires currently to have running 4 Dash Core instances: wallet and at least 3 Evo Nodes which forms quorum.
This issue has been partially addressed #6261 by allowing to use only 2 Evo Nodes. Though, previous solution still requires all DKG steps, heavy network communication and various instability.
What was done?
Added support for RegTest quorums
llmq_testandllmq_test_instantsendto be form and sign messages even if only one node is available.While regular quorum with several nodes 7 steps of creation (Initialization, Contribution, Complaining, Justification, Commitment, Finalization, Mining) this type of quorum just from Initialization straight to the Finalization.
The signing process with this quorum is also simplified. So far as regular quorum requires to sign multiple shares, for single node quorum the messages are signed immediately by just one node.
Though, single-node-quorum doesn't generate new pair of private and public keys, instead it just uses operator private and public key. Not sure if there's any possible down-sides.
It is an alternate solution to #6437 which introduces brand-new quorum type.
Advantages of this solution is:
How Has This Been Tested?
See a new functional test feature_llmq_singlenode.py
To use this feature Dash Core should be started with these 3 params:
-llmqtestparams=1:1 -llmqtestinstantsendparams=1:1 -lmqtestplatformparams=1:1. It let to InstantSend, Chainlocks to be formed, EHF signals appears, messages to be signed, etc with just one masternode or evo node.Breaking Changes
N/A
Checklist: