feat(flashblocks): Add flashblocks sequence persistence logic on RPC and sequence replay flashblock builder#162
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louisliu2048 merged 8 commits intomainfrom Mar 4, 2026
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Clone cached payloads instead of taking ownership, allowing the flashblock payloads cache to persist across multiple retrievals for the same parent hash. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add disk persistence for the pending flashblocks sequence received via the flashblock broadcast channel. A dedicated `xlayer-flashblocks-persistence` task writes each incoming flashblock to a JSON file using atomic write-then-rename, ensuring crash-safe state on disk. Key changes: - Introduce `FlashblockPayloadsSequence` as a serializable struct with serde support for JSON persistence - Add `persist()` and `load_from_file()` methods to `FlashblockPayloadsCache` - Spawn a separate persistence task alongside the existing publish task - Thread `datadir` from node config through to the flashblocks service - Make `FlashblockPayloadsCache` public for cross-crate usage 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…m file Add replay-from-persistence-file CLI flag and config to allow the sequencer to load the pending flashblocks sequence from disk on startup. This enables the builder to resume flashblocks streaming after a restart without waiting for a new block build cycle. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…tead - Replace per-flashblock disk writes with tokio::select! loop using a 5-second interval and dirty flag to reduce I/O from ~4/sec to ~0.2/sec - Add final flush on shutdown to avoid losing latest cached state - Remove redundant load_from_file method, migrate tests to try_load_from_filepath - Fix doc comment spacing in FlashblocksArgs - Use idiomatic flashblock.as_ref().clone() instead of FlashBlock::clone() 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
limyeechern
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Mar 3, 2026
… exist 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
limyeechern
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* main: Feat(chainspec): adding xlayer-devnet chainspec (#167) chore(builder): flatten flashblocks builder, remove unnecessary trait interfaces (#172) rpc: remove unnecessary trait bounds and dependencies from XlayerRpcExtApiServer impl (#171) fix fmt in bin/tools/gen_genesis.rs (#170) fix(builder): Resolve bugs on upstream flashblocks timing scheduler (#169) Feat(tools): Add a tool to generate a custom genesis file based on a template and existing chain data (#159) feat(flashblocks): Add flashblocks sequence persistence logic on RPC and sequence replay flashblock builder (#162) chore(builder): remove unused custom-engine-api feature flag in tests (#168) fix: p2p test hang due to hang on port (#165)
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Mar 13, 2026
* main: (25 commits) fix: bump quinn-proto to 0.11.14 to patch CVE-2026-31812 DoS vuln (#183) pre-job authorization (#193) fix: trigger review skill failed to ack (#192) feat: trigger skill review separately (#191) feat: add Claude skills and CLAUDE.md for AI-assisted development (#190) rename ext (#185) supply workflow for claude (#184) feat(builder): incremental trie cache optimization for flashblocks state root (#163) chore(flashblocks-rpc): migrate op-reth flashblocks into xlayer-reth (#175) Feat(chainspec): adding xlayer-devnet chainspec (#167) chore(builder): flatten flashblocks builder, remove unnecessary trait interfaces (#172) rpc: remove unnecessary trait bounds and dependencies from XlayerRpcExtApiServer impl (#171) fix fmt in bin/tools/gen_genesis.rs (#170) fix(builder): Resolve bugs on upstream flashblocks timing scheduler (#169) Feat(tools): Add a tool to generate a custom genesis file based on a template and existing chain data (#159) feat(flashblocks): Add flashblocks sequence persistence logic on RPC and sequence replay flashblock builder (#162) chore(builder): remove unused custom-engine-api feature flag in tests (#168) fix: p2p test hang due to hang on port (#165) fix: update testcontainers to v0.27.0 to remediate CVE-2025-62518 (#164) chore(builder): further clean up builder crate (#161) ...
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Summary
This PR adds new logic on the flashblocks RPC nodes to persist the current pending flashblocks sequence to disk, and adds logic on our flashblocks sequencer startup to read from disk the pending flashblocks sequence to possible replay the sequences.
flashblocks.replay-from-persistence-fileto enable replay on flashblocks sequence on sequencer restart