{
  "tool_id": "art-654-perp-funding-implied-yield",
  "kernel_id": "art-654-perp-funding-implied-yield",
  "display_name": "Perp Funding Implied Yield",
  "tool_version": "1.0.0",
  "mandate_type": "perp_funding_rate",
  "purpose": "Recomputes a perpetual-contract funding rate and its simple-annualized implied yield from caller-declared inputs, for either of two declared funding-mechanism variants: offshore-8h-twap (a continuous TWAP-sampled premium-index-plus-interest-rate-differential-clamp formula, the shape observed on offshore crypto perpetual venues) or kalshi-periodic (a simpler point-in-time price-differential reset, modeled against the CFTC's 2026 regulated-perpetual-contract framework). The funding mechanism, and every numeric parameter of it (interval length, clamp bound), is always a declared input, never an assumed default. An optional prev_funding_hash chains this print to its predecessor's own execution_hash, turning a series of same-pair prints into a walkable, cryptographically bound funding history. Complements the landed Prediction Market Artifact Validator (T631) in copy only, with no file overlap: that tool validates settlement artifacts for event markets, this one recomputes the ongoing funding-rate carry on a perpetual position. Verify-only: recomputes a caller-declared formula from caller-declared inputs, never fetches a live market price or a venue's actual current funding print, and never asserts that any venue's own published print matches this recompute. A declared input outside the domain (invalid mechanism, non-positive price, malformed prior-print hash, etc.) is rejected by name, never silently clamped or coerced.",
  "control_description": "Recomputes a perpetual-contract funding rate and its simple-annualized implied yield from caller-declared inputs, for either of two declared funding-mechanism variants: offshore-8h-twap (a continuous TWAP-sampled premium-index-plus-interest-rate-differential-clamp formula, the shape observed on offshore crypto perpetual venues) or kalshi-periodic (a simpler point-in-time price-differential reset, modeled against the CFTC's 2026 regulated-perpetual-contract framework). The funding mechanism, and every numeric parameter of it (interval length, clamp bound), is always a declared input, never an assumed default. An optional prev_funding_hash chains this print to its predecessor's own execution_hash, turning a series of same-pair prints into a walkable, cryptographically bound funding history. Complements the landed Prediction Market Artifact Validator (T631) in copy only, with no file overlap: that tool validates settlement artifacts for event markets, this one recomputes the ongoing funding-rate carry on a perpetual position. Verify-only: recomputes a caller-declared formula from caller-declared inputs, never fetches a live market price or a venue's actual current funding print, and never asserts that any venue's own published print matches this recompute. A declared input outside the domain (invalid mechanism, non-positive price, malformed prior-print hash, etc.) is rejected by name, never silently clamped or coerced.",
  "declared_inputs": [],
  "declared_outputs": [],
  "kernel_digest": "sha256:1a7986042035938b1d91987d97e2c17a6b36146d4c214dbc02ef5507d324ebab",
  "trust_label": "independently verified: zkVM execution proof (risc0/groth16-bn254)",
  "data_vintage": "2026-09-04",
  "last_validated": "2026-09-04",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 111,
  "source_url": "https://ainumbers.co/chaingraph/art-654-perp-funding-implied-yield.html",
  "generated_at": "2026-09-05T02:26:40.419Z"
}