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Data Packages

Data Packages are signed envelopes that reference off-chain payloads. Only hashes and pointers are anchored on-chain.

For API validators, an optional adapter field records the anchorer/signer address.

AnchorId​

anchorId = keccak256(abi.encode(
  schemaId,
  dataTypeHash,
  provider,
  windowStart,
  windowEnd,
  payloadHash
))

EIP-712 signature​

The provider signs the envelope using OlympData domain:

  • name: OlympData
  • version: 1
  • chainId: L3 chainId
  • verifyingContract: DataAnchorRegistry

Proof bundle​

Gateways return:

  • Payload bytes (or JSON)
  • Full DataPackage envelope
  • Anchor tx reference + provider score

Valid dataset requirements (MVP)​

  • Schema ID and version MUST exist in SchemaRegistry.
  • Payload hash MUST match the payload bytes.
  • Window timestamps MUST be valid and within drift limits.
  • Signature MUST match the expected signer for the tier.
  • Anchor MUST exist on-chain and match the envelope fields.
  • Payload size MUST respect gateway limits.

API validator models​

  • Tier A (Provider-Signed / Model 1): provider signs, adapter anchors.
  • Tier B (Adapter-Attributed / Model 2): adapter signs + anchors (bootstrap).