Governance

Scoped Capability Tokens for STVA

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Briefings

A draft Ethereum standard (ERC-1271 compatible) defines scoped capability tokens for Secure Transaction Verification and Authorization (STVA). These tokens grant specific actions with time limits and revocation, replacing broad approvals. The standard requires binding capabilities to simulation results or intent hashes to ensure offline verifiability and prevent re-use. Issuance is handled by any authority, while consumption involves checking signatures against scope, expiry, and simulation binding. The specification outlines compliance levels from Basic to Strict and defines an interface for verification.

Key points

• The standard defines a structured data object for scoped capabilities with fields including issuer, subject, scope, validAfter, validUntil, and optional simulationResultHash binding.
• Capabilities are issued by any authority (EOA, multisig, or smart account) and can be revoked via issuer publishing a revocation list entry or on-chain registry.

Context

This finding addresses high-value loss vectors where broad, long-lived approvals and owner keys are primary attack vectors. The standard enforces least privilege at signing time by limiting authority to specific actions with explicit lifecycle rules, enabling clean composition with independent simulation results.

Limitations

Coverage is limited to the draft specification and discussion points provided. Uncertainty exists regarding exact scope encoding (ABI vs. JSON), on-chain vs. off-chain revocation list implementation, and binding strength to simulation results. The status is Draft type with Standards Track category, and no specific implementation details or author names are confirmed beyond the discussion topic link.

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