feat(structlog): add cold access detection and memory expansion utilities#84
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mattevans merged 8 commits intorelease/mem-expansion-and-precompilesfrom Feb 17, 2026
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…ties feat(structlog): expose IsPrecompile helper for external use feat(execution): extend StructLog with MemorySize, CallTransfersValue, ExtCodeCopySize test(structlog): add comprehensive tests for cold access and memory expansion
Introduce memory and cold-access counters to enable gas cost breakdown into memory expansion and state-access categories. - Extend CallFrameRow and OpcodeStats with memory-words sums (before/after) and squared sums plus cold-access counts. - Update aggregator to accumulate the new fields per opcode and roll them up to frame summaries. - Add memWordsBefore, memWordsAfter, coldAccessCount params to ProcessStructlog and wire them in transaction processing. - Extend ClickHouse columns and batch insert logic to persist the new metrics. - Remove local precompile list and delegate to structlog pkg.
…stant test(memory_test): add comprehensive unit tests for resolveLastInFrame style(memory): remove outdated comment about RETURN/REVERT stack layout
test: add boundary precision tests for cold access classification test: add unit tests for memory parsing and word computation test: add aggregator tests for resource gas accumulation and nested frames test: add column tests for new resource gas fields
…e to empty account The classifier now removes the 25 000 gas charged for creating a new account before deciding how many cold accesses occurred. This prevents false positives when the large new-account cost would otherwise be mis-classified as extra cold accesses. docs: clarify CALL value-transfer and stipend comments test: add cases covering CALL to empty accounts with value transfer
…on logic - Add detailed inline comments explaining CALL and EXTCODECOPY gas composition, normalization steps, and range-based classification rules. - Clarify why 200/2600/5200 thresholds are safe (gaps >2000 gas). - Document precompile warm-up via EIP-2929 and fallback stack reads. - No functional change; improves future maintainability.
…pped feat(aggregator): add exact memory expansion gas tracking per opcode refactor: replace hard-coded thresholds with warmAccessCost constant
Savid
approved these changes
Feb 17, 2026
mattevans
merged commit 7092035
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release/mem-expansion-and-precompiles
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samcm
approved these changes
Feb 17, 2026
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feat(structlog): expose IsPrecompile helper for external use
feat(execution): extend StructLog with MemorySize, CallTransfersValue, ExtCodeCopySize
test(structlog): add comprehensive tests for cold access and memory expansion