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zk-proofs

Skill17 starsChanged 2 months agoMITView on GitHub

Zero-knowledge proofs and privacy patterns on Stellar. Covers Groth16 verification via BLS12-381 host functions (CAP-0059), Circom (on-chain verifiable today), Noir, and RISC Zero toolchains. Use when building privacy-preserving dApps, ZK verifier contracts, or wiring proving systems to Stellar.

1 other project uses a version of this.

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The file

We split this skill into the rules it gives an agent

2 rules. About 0 are common, 2 are distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈2

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

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    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Only Circom proofs can be verified on-chain today

    line 49
  2. Distinctive:

    Always test with small circuits first — proving is expensive

    line 52

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

ZK Proofs

When to Use

  • Privacy-preserving transactions on Stellar
  • On-chain ZK verification in Soroban contracts
  • Private voting, identity, or credential systems
  • Integrating Circom/Noir with Stellar

Toolchain Status

ToolOn-Chain VerifiableNotes
CircomYes (today)Groth16 via BLS12-381 host functions
NoirPending BN254Attestation pattern until CAP-74 lands
RISC ZeroPending BN254Attestation pattern for now

Groth16 Verification (Circom)

Uses BLS12-381 pairing check host functions (available since Protocol 20).

circuit.circom → r1cs → zkey → proof.json + public.json
                                   ↓
                        Soroban contract verifier
                        (import soroban-zk-verifier)

Strict Rules

  1. Only Circom proofs can be verified on-chain today
  2. Noir and RISC Zero use the off-chain attestation pattern until BN254 lands
  3. ZK verifier contracts must import soroban-zk-verifier crate
  4. Always test with small circuits first — proving is expensive

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