v0.6.1

🚀 Yellowstone Vixen v0.6.1 — Release Notes

⭐ Highlights

• Introduced block-coordinator for complete and ordered slot processing
• Added Kafka sink with ordering and delivery guarantees
• Upgraded proc-macro + IDL system with optional proto compatibility
• Expanded stream capabilities and filtering model
• Reworked snapshot ingestion pipeline with backpressure support
• Added BPF loader parser and improved SPL parsing
• Improved observability, error handling, and concurrency

---

🧱 Block Coordinator

New crate: yellowstone-vixen-block-coordinator

Summary

Combines Yellowstone gRPC stream with block engine data to construct complete blocks and emit fully ordered slot data.

Key Changes

• Transactional slot processing (#230)
• Handling incomplete slots (#233)
• Include failed transactions to avoid pipeline stalls (#200)
• Enforce Processed commitment (#199)

---

📡 Stream Enhancements

Crate: yellowstone-vixen-stream

Improvements

• Multiple program subscriptions (#160)
• Consolidated filters into a single subscription (#192)
• Added failed field to TransactionPrefilter (#191)

---

🧬 Proc-Macro + IDL System

Crate: yellowstone-vixen-proc-macro

Enhancements

• Generated IDLs now support optional Protobuf compatibility via proto feature (#212)
• Proc-macro for generating parsers from Codama IDL (#161)
• Generated IDLs made public (#183)
• Protobuf compatibility for transactions and accounts (#197)

Improvements

• Support for remaining_accounts (#207)
• Support for nested vectors (#241)
• Program event proc-macro (#236)
• Accounts and args made non-optional (#213, #214)
• Improved developer experience (#217)

---

🧵 Kafka Sink

New crate: yellowstone-vixen-kafka-sink

Features

• Ordered publishing aligned with block-coordinator (#202)
• SASL SCRAM-SHA-256 with TLS support (#225)
• Configurable compression (default: zstd) (#227)
• Public API soft-gated for account builder/parser (#211)

---

📦 Snapshot Pipeline

Changes

• Reworked snapshot source (#165)
• Introduced bounded channels for backpressure (#162)
• Fixed filter preflight issues (#156)
• Exposed SolanaSnapshotConfig (#154)

---

🔌 Data Sources

Jetstream Source

• Added yellowstone-vixen-jetstream-source crate (#170)
• Optimized ingestion pipeline (#237)
• Initial implementation reverted and reintroduced (#163, #166)

---

🔍 Parsers

Additions

• BPF loader parser (#208)

Improvements

• SPL Token 2022 extensions (#159)
• Use unpack_from_slice for safer parsing (#155)
• Parse only relevant program accounts (#239)

Fixes

• Panic fixes in SPL parsing (#171, #175)

---

⚙️ Pipeline & Concurrency

• Bounded channels for flow control (#162)
• Refactor consumption using fume (#178)
• Deterministic Kafka publishing (#202)

---

📊 Observability & Errors

• Added tracing spans (#143)
• Improved error handling (#215)
• Suppressed decode warnings (#232)

---

🌐 Yellowstone gRPC Source

Crate: yellowstone-vixen-yellowstone-grpc-source

Improvements

• Fixed filter merge semantics to use union behavior (#177)
• Improved gRPC error propagation (#190)

---

🛠 Build & Tooling

• Workspace dependency unification (#131)
• Standardized Rust edition (#137)
• CI improvements and test execution (#195, #240)
• Nightly toolchain pinning (#206)
• Fixed missing system dependencies (#194)

---

New Contributors

• @lvboudre made their first contribution in #131
• @Kym0211 made their first contribution in #137
• @nooma-42 made their first contribution in #139
• @raunit-dev made their first contribution in #143
• @CanardMandarin made their first contribution in #147
• @vladdoster made their first contribution in #153
• @senzenn made their first contribution in #163
• @grooviegermanikus made their first contribution in #169
• @RedaRahmani made their first contribution in #177
• @hack-wrench made their first contribution in #183
• @kino-andrew made their first contribution in #190
• @the-orex made their first contribution in #203

---

🔗 Full Changelog

v0.5.0...v0.6.1