Merge bitcoin/bitcoin#26066: wallet: Refactor and document CoinControl - #1183
Merge bitcoin/bitcoin#26066: wallet: Refactor and document CoinControl#1183DashCoreAutoGuix wants to merge 3 commits into
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daba957 refactor: Make ListSelected return vector (Sebastian Falbesoner) 9477662 wallet: Move CoinCointrol definitions to .cpp (Aurèle Oulès) 1db23da wallet: Use std::optional for GetExternalOutput and fixups (Aurèle Oulès) becc45b scripted-diff: Rename setSelected->m_selected_inputs (Aurèle Oulès) Pull request description: - Moves CoinControl function definitions from `coincontrol.h` to `coincontrol.cpp` - Adds more documentation - Renames class member for an improved comprehension - Use `std::optional` for `GetExternalOutput` ACKs for top commit: achow101: ACK daba957 Xekyo: ACK daba957 Tree-SHA512: 3bf2dc834a3246c2f53f8c55154258e605fcb169431d3f7b156931f33c7e3b1ae28e03e16b37f9140a827890eb7798be485b2c36bfc23ff29bb01763f289a07c
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WalkthroughChange CCoinControl's selection API: Changes
Estimated code review effort🎯 4 (Complex) | ⏱️ ~45 minutes
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✅ Verification Complete - APPROVEDBitcoin Commit: SummaryThis PR correctly backports the CoinControl refactoring from Bitcoin. The changes move function definitions from Verification Results✅ CI Status: All 53 checks passing Notable Differences from BitcoinThis PR does not include the input weight methods (
The size difference (76.4% vs expected 80-150%) is entirely explained by the missing input weight methods from the original Bitcoin commit. Files Changed (All Correct)
RecommendationAPPROVE - This is a faithful and correct backport of bitcoin#26066, adapted appropriately for Dash's current codebase state. Automated verification by Dash Backport Agent |
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probably partial due to missing changes
+ if (!wallet->DummySignTx(txNew, txouts, coin_control)) {
- if (!wallet->DummySignTx(txNew, txouts, coin_control)) return TxSize{-1, -1};
- return TxSize{-1, -1};
- }| if (!out) { | ||
| return std::nullopt; | ||
| } | ||
| txout = *out; |
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- Refactor DummySignTx check to one-liner in CalculateMaximumSignedTxSize - Update fuzz test to use new GetExternalOutput API (returns std::optional) - Update fuzz test to use new ListSelected API (returns vector directly) These changes complete the backport of bitcoin#26066 to match the refactoring style applied in Bitcoin, adapted for Dash's int64_t return type instead of Bitcoin's TxSize struct.
Verification: Fixes AppliedI've applied the following fixes to complete the Bitcoin backport: Changes Made:
Analysis:The missing changes identified by @knst were incomplete applications of Bitcoin PR bitcoin#26066's refactoring. The PR correctly backported:
But it missed:
These were not dependency issues - just incomplete refactoring application. Size Ratio:The 76.4% size ratio is expected because:
Build passes. Ready for re-verification after CI completes. |
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Actionable comments posted: 1
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📒 Files selected for processing (2)
src/wallet/spend.cpp(4 hunks)src/wallet/test/fuzz/coincontrol.cpp(2 hunks)
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src/**/*.{cpp,h,cc,cxx,hpp}
📄 CodeRabbit inference engine (CLAUDE.md)
C++20 codebase should be placed under src/
Files:
src/wallet/spend.cppsrc/wallet/test/fuzz/coincontrol.cpp
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⚙️ CodeRabbit configuration file
**: # CodeRabbit AI Review Instructions for Dash BackportsYour Role
You are reviewing Bitcoin Core backports to Dash Core. Your ONLY job is to validate that the Dash commit faithfully represents the original Bitcoin commit with minimal, necessary adaptations.
Critical Validation Rules
1. File Operations Must Match (AUTO-REJECT if violated)
- If Bitcoin modifies an existing file → Dash MUST modify (not create new)
- If Bitcoin creates a new file → Dash creates
- If Bitcoin deletes a file → Dash deletes
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2. Size Ratio Check (80-150% of Bitcoin)
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msg_wtxidrelay,MSG_WTX, witness imports- Auto-reject RBF (replace-by-fee) functionality
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bitcoin→dashin strings/pathsBitcoin→Dashin user-facing text- Port numbers: 8332→9998 (RPC), 8333→9999 (P2P)
- Hardcoded test values specific to Dash
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VALIDATION: [PASS/FAIL] File Operatio...
Files:
src/wallet/spend.cppsrc/wallet/test/fuzz/coincontrol.cpp
src/{test,wallet/test,qt/test}/**/*.{cpp,h,cc,cxx,hpp}
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Unit tests should be placed in src/test/, src/wallet/test/, or src/qt/test/ and use Boost::Test or Qt 5 for GUI tests
Files:
src/wallet/test/fuzz/coincontrol.cpp
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Repo: DashCoreAutoGuix/dash PR: 0
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Timestamp: 2025-07-31T01:14:55.631Z
Learning: DashCoreAutoGuix successfully completed a complex Bitcoin Core backport (PR #29412) for block mutation detection by implementing the IsBlockMutated function, adding net processing integration, creating comprehensive unit tests, and properly adapting all Bitcoin-specific witness code for Dash compatibility. The backport maintains full security functionality while respecting Dash's non-witness transaction architecture.
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Repo: DashCoreAutoGuix/dash PR: 0
File: :0-0
Timestamp: 2025-07-28T22:03:12.364Z
Learning: During multiple verification attempts of Bitcoin Core commit 06d469c26b backport to Dash PR #566, DashCoreAutoGuix consistently identified scope creep in interface_usdt_utxocache.py where additional pruning test functionality was added beyond the original Bitcoin commit. The user provided comprehensive fixes including both scope creep removal and missing mempool test file additions, but couldn't push due to authentication restrictions. The scope creep fix was identified as the priority to resolve CI failures.
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Repo: DashCoreAutoGuix/dash PR: 0
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Timestamp: 2025-07-28T20:34:29.061Z
Learning: During Dash backport verification of Bitcoin Core commit 06d469c26b, scope creep was detected when additional pruning test functionality was added to interface_usdt_utxocache.py beyond what was in the original Bitcoin commit. The fix involved removing the extra test block while maintaining the core compiler flag fixes for USDT compilation errors.
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Timestamp: 2025-07-29T21:29:32.827Z
Learning: DashCoreAutoGuix successfully fixed scope creep in Bitcoin Core commit fcdb39d3ee backport by removing the parse test case from src/test/uint256_tests.cpp that was not part of the original Bitcoin commit. The fix was implemented in commit 16748115ce and verified through range-diff analysis.
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Repo: DashCoreAutoGuix/dash PR: 0
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Timestamp: 2025-07-28T19:54:21.426Z
Learning: In Dash backports from Bitcoin Core, including necessary compilation fixes (such as API compatibility changes like UniValue get_int() → getInt<int>()) alongside the core backport is standard and expected practice. These compatibility fixes ensure the backported code compiles in Dash's evolved codebase while preserving Bitcoin's original functionality and intent.
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Timestamp: 2025-07-27T22:35:10.176Z
Learning: In Dash backports, src/dashbls files are vendored dependencies that should not be modified during Bitcoin Core backports unless there is specific justification. Unauthorized modifications to vendored dependencies should be removed to maintain code integrity.
Learnt from: DashCoreAutoGuix
Repo: DashCoreAutoGuix/dash PR: 0
File: :0-0
Timestamp: 2025-07-30T14:45:15.700Z
Learning: In Dash backports from Bitcoin Core test files, the `address_to_scriptpubkey` function should be imported from `test_framework.wallet` instead of `test_framework.address` as the import location differs between Bitcoin and Dash test frameworks.
📚 Learning: 2025-07-29T21:29:32.827Z
Learnt from: DashCoreAutoGuix
Repo: DashCoreAutoGuix/dash PR: 0
File: :0-0
Timestamp: 2025-07-29T21:29:32.827Z
Learning: DashCoreAutoGuix successfully fixed scope creep in Bitcoin Core commit fcdb39d3ee backport by removing the parse test case from src/test/uint256_tests.cpp that was not part of the original Bitcoin commit. The fix was implemented in commit 16748115ce and verified through range-diff analysis.
Applied to files:
src/wallet/spend.cpp
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🔇 Additional comments (4)
src/wallet/test/fuzz/coincontrol.cpp (1)
56-56: LGTM! Fuzz test correctly updated for new API.The changes properly reflect the refactored CCoinControl API where
GetExternalOutputnow returnsstd::optional<CTxOut>andListSelectedreturnsstd::vector<COutPoint>. Discarding return values is appropriate for fuzz testing.Also applies to: 72-72
src/wallet/spend.cpp (3)
51-51: LGTM! Clean formatting.The single-line early-return pattern is clear and idiomatic.
66-68: LGTM! Correct optional migration.The migration from out-parameter to
std::optionalreturn type is properly implemented. The null check before dereferencing is safe, and using a const reference to the optional avoids unnecessary copies.
521-521: LGTM! Clean API migration.The change from out-parameter to return value makes the code more idiomatic. The range-based for loop cleanly iterates over the returned vector.
| const auto out{coin_control.GetExternalOutput(outpoint)}; | ||
| if (!out) { | ||
| return std::nullopt; | ||
| } | ||
| txout = *out; |
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🧹 Nitpick | 🔵 Trivial
LGTM! Correct optional migration.
The migration to std::optional is properly implemented with safe null-checking before dereferencing.
Optional style note: Line 534 uses const auto out (copy) while line 66 uses const auto& txout (reference). For consistency, consider using const auto& here as well to avoid copying the optional, though both approaches are functionally correct.
🤖 Prompt for AI Agents
In src/wallet/spend.cpp around lines 534 to 538, the optional returned by
coin_control.GetExternalOutput is currently captured by value using "const auto
out"; change this to capture by reference using "const auto& out" to match the
style used elsewhere (e.g. const auto& txout) and avoid copying the optional
object before checking and dereferencing it.
- Add blank line after if (!out) block before txout assignment - This matches Bitcoin's formatting in commit 0e70a1b Addresses reviewer feedback from knst.
Validation Fix AppliedApplied additional fix to address reviewer feedback from @knst: Changes
Previous FixesThe earlier validation commit (914890b) already addressed:
Status
Commit: 3eb777b |
✅ Verification Complete - APPROVEDSummaryThis PR faithfully backports Bitcoin Core bitcoin#26066 (commit 0e70a1b) with appropriate Dash adaptations. All validation fixes have been successfully applied and verified. Changes Verified
Build Status
Validation Fixes AppliedTwo validation commits addressed reviewer feedback:
Comparison to Bitcoin
This backport is ready to merge. |
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Backports bitcoin#26066
Changes
coincontrol.htocoincontrol.cppsetSelected→m_selected_inputsfor improved comprehensionGetExternalOutputto returnstd::optional<CTxOut>instead of using output parameterListSelectedto returnstd::vector<COutPoint>instead of using output parameterDash-specific notes
UseCoinJoinandIsUsingCoinJoinmethodsInputWeightmethods (SetInputWeight, HasInputWeight, GetInputWeight) as these were from a prior Bitcoin PR not yet backported to DashOriginal commit: 0e70a1b
Summary by CodeRabbit
Refactor
New Features
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