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OceanEye Sentinel 2.0 — Vault and Rounding Verification
x402
OceanEye Sentinel 2.0 — Vault and Rounding Verification is a paid API for AI agents from sentinel.oceaneye-ai.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-04).
Formally verifies ERC-4626 vault share/asset rounding invariants by executing user-supplied deposit and redeem preview functions against symbolic or bounded inputs to detect counterexamples.
Price / call$0.02
Success—
StatusUnknown
How this service works
OceanEye Sentinel 2.0 — Plataforma de Inteligencia Marítima Satelital con Radar SAR Sentinel-1, Segmentación SAM 3.1 (Puerta A + Control Negativo), Arena Multimodal Muse Wonder 1.0 vs Muse Spark 1.3 (n=30) y Cadena de Custodia Ed25519.
Output
Returns a JSON object indicating whether the vault's rounding invariants are verified (boolean), the type of check performed, the solver mode used, and optionally a counterexample object showing the specific asset/share values that violate the invariant if one is found.
Example use cases
ERC-4626 rounding invariant audit
“I'm about to deploy my ERC-4626 vault and need to verify there are no rounding bugs. Here's my preview_deposit function and preview_redeem function — please run a formal verification pass with max_assets=5000 and max_shares=5000 and tell me if there are any counterexamples.”
Zero-share mint vulnerability scan
“My vault auditor flagged a potential zero-share mint issue. Can you check my preview_deposit code with check_zero_share_mint enabled, up to 10000 assets and 10000 shares, and show me any counterexample if one exists?”
Pre-deployment vault logic validation
“Before I launch this lending vault, can you formally verify that my deposit and redeem preview functions satisfy the ERC-4626 rounding spec? Here are both functions in Python — use max_assets=1000 and max_shares=1000.”
Technical details
Endpoint
POSThttps://sentinel.oceaneye-ai.com/x402/verify-vault-and-rounding?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need automated formal or bounded verification of ERC-4626 vault share/asset rounding invariants, especially before deploying vault contracts. Prefer it over manual unit testing when you want systematic counterexample search across a bounded input space. Best suited for DeFi developers needing quick, low-cost ($0.02 USDC) correctness checks on vault preview functions prior to audit or deployment.
Side effects
- Invalid or unparseable Python/AST code in redeem_fn_code or deposit_fn_code returns an error message
- Solver timeout or resource exhaustion if bounds are very large
- Malicious or unsafe code in function arguments may be rejected
- Counterexample found — verification returns verified=false with counterexample details
- Network or payment authentication failure returns HTTP 402 or 500
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| max_assets | integer | |
| max_shares | integer | |
| redeem_fn_code | string | Python/AST code for preview_redeem |
| deposit_fn_code | string | Python/AST code for preview_deposit |
| check_zero_share_mint | boolean |
Output
Schema · Response
{
"type": "json",
"example": {
"message": {
"type": "string"
},
"verified": {
"type": "boolean"
},
"check_type": {
"type": "string"
},
"solver_mode": {
"type": "string"
},
"counterexample": {
"type": [
"object",
"null"
]
}
}
}Tags
x402
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