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test(crypto): keep mock circuits impure for live - #850
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WalkthroughChangesThe change migrates cryptographic tests from compiled pure circuits to asynchronous runtime simulators. Test mocks now use impure circuits with invocation counters, and token tests await simulator operations. Crypto runtime test migration
Estimated code review effort: 3 (Moderate) | ~20 minutes Suggested reviewers: Merge Risk: 🟡 Moderate · up to The live ECDH test may fail during ElGamal fixture setup before exercising its assertions. Resolve the deployment-limit problem or use a deployable fixture before merge. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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🧪 Generate unit tests (beta)
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In `@contracts/src/crypto/test/EcdhMask.test.ts`:
- Line 81: Update the live-test setup around ElGamalSimulator.create so the
MockElGamal dependency can be deployed within local-node block limits, either by
reducing the mock contract deployment size or by using a deployable live-test
fixture, while preserving the existing ECDH round-trip assertion.
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📒 Files selected for processing (14)
contracts/package.jsoncontracts/src/crypto/test/CurveRuntimeInvariants.test.tscontracts/src/crypto/test/EcdhMask.test.tscontracts/src/crypto/test/Ecdsa.test.tscontracts/src/crypto/test/mocks/MockCurveOps.compactcontracts/src/crypto/test/mocks/MockEcdhMask.compactcontracts/src/crypto/test/mocks/MockEcdsa.compactcontracts/src/crypto/test/mocks/MockElGamal.compactcontracts/src/crypto/test/simulators/CurveOpsSimulator.tscontracts/src/crypto/test/simulators/EcdhMaskSimulator.tscontracts/src/crypto/test/simulators/EcdsaSimulator.tscontracts/src/crypto/test/simulators/ElGamalSimulator.tscontracts/src/token/test/ConfidentialFungibleToken.test.tscontracts/test-utils/harness/funding.ts
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andrew-fleming
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Good call on tackling this! I left a few comments and questions
| "compile:access": "compact-compiler --dir access", | ||
| "compile:archive": "compact-compiler --dir archive", | ||
| "compile:crypto": "compact-compiler --dir crypto --feature-zkir-v3", | ||
| "compile:crypto": "compact-compiler --dir crypto --exclude 'MockEcdsa.compact' && compact-compiler --dir crypto/test/mocks --exclude 'MockElGamal.compact' --exclude 'MockEcdhMask.compact' --exclude 'MockCurveOps.compact' --feature-zkir-v3", |
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This is fine but messy. Might be worth creating something like an --only flag in the CLI
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Agree — --only added in OpenZeppelin/compact-tools#175. This script switches to --only 'MockEcdsa.compact' once it ships.
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Deferred — compact-cli 0.1.1 lists --only, but compact-builder 0.0.5 predates it and rejects the flag, so 80f18c8 keeps the excludes until the next builder release.
| // A trap fires while the circuit is evaluated locally, before any proof, so | ||
| // the rejections below hold on the live backend too. | ||
| const traps = (call: Promise<unknown>): Promise<void> => | ||
| expect(call).rejects.toThrow(); |
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If there are failures on live, won't a deploy or provider error also satisfy it?
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Agree — fixed in 37e8459. Each rejection now pins the runtime fault (WASM unreachable, the EmbeddedGroupAffine decode fault, or the JubjubScalar type error), verified 13/13 live.
Selecting a handful of files out of a directory currently means listing every other file under --exclude, or chaining a second compiler pass. --only inverts that: a file is compiled when it matches at least one --only pattern and no --exclude pattern. Both flags share the matcher, so they take the same glob shapes, and both apply to compiler discovery and the builder's .compact dist copy. A non-empty --only also suppresses the builder's default Mock* exclude, which would otherwise veto an include list of mocks and copy nothing. No match is the existing empty-directory path: a warning and exit 0, not a new error. Refs: OpenZeppelin/compact-contracts#850
andrew-fleming
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Changes look good! Left a small nit you can choose to differ. We just need to fix conflicts :)
A mock whose circuits touch neither ledger nor witness has all of them promoted to pure by the compiler, so the artifact ships no keys/ and no zkir/ and the code is only ever evaluated in JS. The crypto specs then pass identically on the live backend without proving anything. An `_invocations` counter in each mock forces impurity, so every circuit gets a proving key and a real proof on live. The specs move to simulators to reach them. The EcdhMask round-trip property drops to 3 runs on live: 100 runs is 200 transactions, well past the unit-live per-test timeout.
MockEcdsa kept isLowS pure, so the half-order gate was never proven. It now increments the same counter as its siblings and the simulator reaches it through the impure circuit table. compile:crypto becomes two passes. Keygen of the impure MockElGamal panics under --feature-zkir-v3, while MockEcdsa needs v3 for its Secp256k1 types. The jubjub mocks compile under the default ZKIR v2 and MockEcdsa alone gets the flag.
The spec predicted ciphertexts through the ElGamal and EcdhMask mock pureCircuits, which no longer exist now that those mocks are impure. The crypto simulators evaluate the same circuits dry, and every mirror site sits in a dry-only block, so nothing deploys for it on live.
MockElGamal is over the local-node deploy block limit, so the one EcdhMask test that deploys it to derive the recipient key pair now runs dry only. The other seventeen keep proving on live.
A bare `rejects.toThrow()` also passes on a deploy or provider error on the live backend, so the subgroup-enforcement tests could go green without the runtime ever trapping. Each rejection now matches the fault the runtime raises: the WASM `unreachable` trap for off-subgroup points, the EmbeddedGroupAffine decode fault for (1,1), and the JubjubScalar type error for scalar == ell. The live backend wraps the first two in `Error executing circuit`, so those patterns accept either form. Verified live: 13/13 on the local stack, traps in <60ms vs ~18s per accepted tx.
The honest builder fails the v2 pass on crypto/Ecdsa.compact, so v3 is now the default for the crypto directory. Only the three jubjub mocks drop to v2, since their impure circuits fail v3 key generation. --only cannot replace the excludes yet: compact-cli 0.1.1 advertises it, but compact-builder 0.0.5 predates the flag and rejects it.
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Types of changes
Same technique already applied to
MockEcdsain #842; this finishes it for the jubjub mocks and forisLowS.Not visible in the diff:
keys/orzkir/and the specs passed onunit-livewithout proving anything. The_invocationscounter is the only lever that forces impurity. Nothing stays pure: none of these circuits is an oracle recomputing an expected value.ledger()reader.getPublicState()is still{}and the simulator ledger types are unchanged.compile:cryptobecomes two passes. The crypto directory compiles under--feature-zkir-v3as onmain; only the three jubjub mocks drop to the default ZKIR v2, because their impure circuits fail v3 key generation (compact#616, compact#757).--onlywould replace the excludes, but compact-builder0.0.5predates it and rejects the flag, so the excludes stay until the next builder release.pureCircuits. Those exports are gone, so it now drives the same circuits through the crypto simulators, dry-only.Live run against the local stack (
unit-live, 3 workers):CurveRuntimeInvariants13/13,Ecdsa14/14,EcdhMask17/17, all with real proofs. The one EcdhMask test that derives keys throughMockElGamalis gated to the dry backend.MockElGamal(16 circuits) is rejected at deploy withTransaction would exhaust the block limits, which fails the wholeElGamalfile on live. That is the known local-node ceiling and the deployer tool is picking it up; the mock is not split here.PR Checklist