Bolt

bolt is a Rust implementation of an Ethereum PBS relay.

About 2/3 vibecoded.

Storage architecture and allocation strategy were designed by me.

Status

• registerValidator
• submitNewBlock
• getHeader
• getPayload
• JSON + SSZ
• Capella / Deneb / Electra / Fulu
• BLS verification
• beacon duties / payload attributes / publish
• redb persistence and recovery
• rate limits and metrics

Shape

• fixed-size protocol types on the hot path
• fixed 2056-slot modulo ring for recent auction state
• redb for local durability
• jemalloc on supported targets

Run

cargo run

• default listen: 127.0.0.1:9062
• override with BOLT_LISTEN_ADDR

Docs

• ARCHITECTURE.md