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Meyanis95 merged 10 commits into from
Jun 2, 2026
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feat(shielded-pool): draft PIR + epoch nullifiers extension spec #72

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feat(shielded-pool): draft PIR + epoch nullifiers extension spec
Meyanis95 May 19, 2026
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chore(shielded-pool): align extension SPEC frontmatter to repo conven…
Meyanis95 May 19, 2026
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feat(shielded-pool): IVC chain proofs and prover-agnostic PIR spec
Meyanis95 May 20, 2026
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refactor(shielded-pool-extension): split out from shielded-pool build…
Meyanis95 May 20, 2026
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docs(shielded-pool-extension): address review feedback on PIR spec
Meyanis95 May 22, 2026
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docs(shielded-pool-extension): indexed Merkle nullifier trees per review
Meyanis95 May 26, 2026
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fix(spec): fixes from comments
Meyanis95 May 27, 2026
391cab0
docs(shielded-pool-extension): address SPEC audit findings
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fix(shielded-pool-extension): bind owner_in to spending_key in spend …
Meyanis95 Jun 1, 2026
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feat(pir-extension): resolved rymnc comments
Meyanis95 Jun 1, 2026
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22 changes: 22 additions & 0 deletions pocs/private-payment/shielded-pool-extension/README.md
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# Shielded Pool Extension: PIR + Epoch Nullifiers

A spec-only PoC that extends the [shielded-pool](../shielded-pool/) private-payments construction with two additions:
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- PIR over the wallet's pre-spend tree reads, closing the state-read privacy leak at the indexer/RPC layer.
- Epoch-based nullifiers with a per-note recursive chain proof (IVC), bounding the on-chain nullifier set without imposing linear per-spend work as notes age.

The note format, deposit, and attestation flows of the parent are preserved. The commitment is extended to bind `epoch_created` so the on-chain verifier can enforce that a spend's chain proof covers the note's full lifetime.

## Status

Specification only. No implementation in this folder. The protocol is proof-system agnostic; see [SPEC.md](./SPEC.md) for the abstract requirements an implementation must meet.

## Documents

- [SPEC.md](./SPEC.md): protocol specification
- Parent SPEC: [`../shielded-pool/SPEC.md`](../shielded-pool/SPEC.md)
- Parent REQUIREMENTS: [`../REQUIREMENTS.md`](../REQUIREMENTS.md)

## Security disclaimer

Research prototype, not production-ready. Cryptographic assumptions and known shortcuts are documented in the SPEC.
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