A
AvenaTerminal · Est. 2026
Avena · Products · Property Oracle

The verified oracle
for RWA property protocols.

HMAC-SHA256 signed price feeds for European residential property, designed for direct consumption by DeFi real-world-asset protocols (Centrifuge, Goldfinch, Maple Finance, Aave RWA). Every envelope carries a fingerprint hash + nonce + verify URL. Signature verification is stateless and chain-friendly.

HMAC
SHA-256 signing
Ed25519
v2 roadmap
ZK
Proof endpoint
MIT
Verify code OSS
Envelope format

APON Oracle v1 — stateless, replayable, chain-friendly.

GET https://avenaterminal.com/api/v1/oracle/property/AVN:ES-03185-NB-0421

{
  "envelope_version": "1.0",
  "avn_prop_id": "AVN:ES-03185-NB-0421",
  "payload": {
    "price_eur": 487200,
    "price_per_m2_eur": 4520,
    "avena_score": 76,
    "valuation_method": "comparable_sales",
    "issued_at": "2026-05-25T18:42:00Z"
  },
  "payload_hash": "a3f9e8...",
  "signature": "9c4b2f...",
  "nonce": "8e2a14c5...",
  "signing_method": "HMAC-SHA256",
  "issuer": "avena-terminal-v1",
  "verify_url": "/api/v1/oracle/verify"
}

Consumers compute SHA-256 of the canonical-JSON payload, compare to payload_hash, then verify the HMAC signature over avn_id::payload_hash using the public verify endpoint. v2 migration to Ed25519 (asymmetric, no shared secret) is on the published roadmap.

Protocol targets

Four RWA protocols, four integration patterns.

Centrifuge

Direct property NFT collateralisation against Tinlake pools. AVN-IDs as canonical asset identifiers. APON envelopes feed Centrifuge's valuation oracle.

Goldfinch

Senior tranche underwriting for European residential mortgage warehouses. Avena's AVM + cohort risk weights drive tranche pricing.

Maple Finance

Institutional lending against European residential collateral. APON envelopes serve as the price reference for margin call triggers.

Aave RWA

Real-world asset listing on Aave Arc / Aave Real-World Assets. Avena's signed feeds feed Chainlink-compatible price oracles.

Index feeds

Beyond individual properties — index-level signed feeds.

The Avena Index Family (AVENA-CC / VAL / SCR / DPT) is also published as signed envelopes for protocols that need market-level rather than property-level pricing. Suitable for index-tracking RWA basket products, structured note hedging, and futures contract settlement.

GET /api/v1/oracle/index/AVENA-CC
GET /api/v1/oracle/index/AVENA-VAL
GET /api/v1/oracle/index/AVENA-SCR
GET /api/v1/oracle/index/AVENA-DPT
GET /api/v1/oracle/verify  (POST with envelope to verify)
Protocol partnership inquiries

For protocol-level integration including custom rate limits, Chainlink-compatible adapters, and white-label envelope branding, contact the Avena research desk. Open APON envelope spec at /standards/avp.

Request protocol integration →APON Oracle docs →AVN-ID Registry →