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devcon8 / ssz query language implementation for erigon

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SSZ Query Language Implementation for Erigon

Duration: NaN:NaN:NaN

Speaker: Sagar Rana

Type: CLS - EPF Talk

Expertise: Some familiarity with the topic

Event: Devcon

Date: Nov 2026

SSZ-QL is a query language for querying execution layer data **with proofs** directly from Erigon's SSZ encoded blocks (this is WIP too under another EPF project by another fellow), built against Erigon's `rpcdaemon` module. I will share concrete design decisions from implementing it: the five query primitives (anchor, path, filter, summaries, aliases) and a JSON request and response envelope schema. I will cover how this differs from GraphQL and other existing RPC methods for querying block data and proofs, lessons from reviews and bugs caught during implementation phase and why the specs were formalized as they are. Project proposal: [SSZ Query Language for Erigon](https://github.com/eth-protocol-fellows/cohort-seven/blob/main/projects/Erigon-SSZ-Query-Language.md) SSZ-QL specs mentioned above: [SSZ-QL for the Ethereum Execution Layer](https://hackmd.io/@SoarinSkySagar/rkwwvAMEzg)

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Core ProtocolProving SystemsOpen Source