chore(op-rbuilder): release v0.3.1

[github-actions]

🤖 New release

• op-rbuilder: 0.3.1

Changelog

[0.3.1] - 2026-02-24

Bug Fixes

• Don't miss blocks on batcher updates (#529)
• Don't build flashblocks with more gas than block gas limit (#567)
• Set an address for authrpc to the op-rbuilder readme (#581)
• Add default-run to the op-rbuilder's manifest (#162)
• Record missing flashblocks (#225)
• Record num txs built with flashblocks enabled (#227)
• Override clap long version envs (#235)
• Gracefull cancellation on payload build failure (#239)
• Flashblock contraints in bundle api (#259)
• Check per-address gas limit before checking if the tx reverted (#266)
• Jovian hardfork tests & fixes (#320)
• wspub: Add flashblocks payload subscriber count limit (#373)
• Separate flashblocks payloads handling and full built payloads in handler (#354)
• Attempt to send one flashblock if payload deadline is in the past (#386)

Bundles

• Ensure that the min block number is inside the MAX_BLOCK_RANGE_BLOCKS (#128)

Documentation

• Eth_sendBundle (#243)

Features

• Add a feature to activate otlp telemetry (#31)
• Add transaction gas limit (#214)
• Address gas limiter (#253)
• Add commit message and author in version metrics (#236)
• Overwrite reth default cache directory (#238)
• Implement p2p layer and broadcast flashblocks (#275)
• Implement flashblock sync over p2p (#288)
• Publish synced flashblocks to ws (#310)
• Integrate downstream changes (Jovian hardfork + miner_setGasLimit + reth 1.9.1) (#316)
• tests: Add BuilderTxValidation utility for validating builder transactions (#347)
• o11y: Add tokio metrics (#367)
• logs: Flashblock target and events with payload_id (#365)

Miscellaneous

• Workspace wide package settings (#390)
• Fix op-rbuilder devnet docs (#562)
• Add unused_async lint, deny unreachable_pub (#299)
• deps/reth: Bump reth to 1.9.2 (#318)
• deps: Bump reth (#321)
• Set builder name in reth_builder_info (#352)
• op-rbuilder: Release v0.2.14 (#359)
• log: Add log targets for better explicit logs filtering (#371)

Performance

• Remove unnecessary clones in payload building (#392)

Refactor

• Add unreachable_pub warning and autofix warnings (#263)
• Clean up and improve flashblocks build_payload (#260)
• Clean up flashblocks context in payload builder (#297)
• Use task executor in payload handler (#377)
• Extract flashblock timing code and test it (#380)

Deps

• Reth v1.3.4 (#507)
• Reth v1.3.8 (#553)
• Use op-alloy types instead of rollup-boost (#344)

Op-rbuilder

• Update Documentation / CI Script (#575)

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