test: replace ffldb Bitcoin fixture

[wolf31o2]

Summary

• generate deterministic, Handshake-wire blocks for ffldb storage tests
• enable the interface, pruning, corruption, and injected failure suites
• remove the inherited Bitcoin fixture with incompatible 80-byte headers
• derive corruption offsets from decoded transaction locations

Validation

• go test ./...
• go vet ./...
• make build
• make lint workers=2
• CI-pinned golangci-lint v2.1.6
• make unit-cover
• make unit-race
• make integration
• pinned hsd interop at 9f013c1cb7f92edf94db69fbd69daf34adf655fb
• exact CI Go 1.26.5 test, vet, build, coverage, race, integration, and hsd interop
• repeated ffldb tests and race tests under Go 1.26.5
• Docker builds for linux/amd64 and linux/arm64

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Summary by cubic

Replaced the Bitcoin-based test fixture with deterministic Handshake-wire blocks for ffldb tests, resolving the header mismatch (80-byte Bitcoin vs 236-byte Handshake). This restores the full interface, pruning, corruption, and injected failure coverage.

• Refactors
  • Added ffldb.TstHandshakeBlocks(t) to generate deterministic Handshake blocks from mainnet genesis (no PoW).
  • Switched driver_test.go, interface_test.go, and whitebox_test.go to the new helper and unskipped the related suites.
  • Derived corruption offsets from TxLoc to target transaction bytes reliably.
  • Removed database/testdata/blocks1-256.bz2 and the bzip2/IO loader code.

^{Written for commit 1d2cf7f. Summary will update on new commits.}

Summary by CodeRabbit

• Tests
  • Re-enabled pruning, interface, and failure-scenario database tests.
  • Added deterministic Handshake block fixtures for reliable test execution.
  • Improved corruption testing by deriving validation offsets from transaction data.
  • Replaced legacy external block fixtures with built-in test data.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 0762d3a8-7833-4ee4-8562-bd97bcae0d14

📥 Commits

Reviewing files that changed from the base of the PR and between 4e5c69d and 1d2cf7f.

⛔ Files ignored due to path filters (1)

• database/testdata/blocks1-256.bz2 is excluded by !**/*.bz2

📒 Files selected for processing (4)

• database/ffldb/driver_test.go
• database/ffldb/handshake_fixture_test.go
• database/ffldb/interface_test.go
• database/ffldb/whitebox_test.go

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📝 Walkthrough

Walkthrough

Added deterministic synthetic Handshake block fixtures with serialization round-trip validation. Updated pruning, interface, and white-box tests to use the shared fixture helper and removed their early skips. Removed legacy bz2 fixture-loading code. White-box corruption testing now derives the target offset from transaction locations rather than a fixed byte offset.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: ffldb tests replace the old Bitcoin fixture with Handshake test blocks.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch test/handshake-ffldb-fixtures

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[cubic-dev-ai]

No issues found across 5 files

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