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⚠️ Alert: Sylan is under active development—only trust contract/wallet addresses announced on our official channels; we will never DM you, ask for funds, or run surprise airdrops/presales.
ProviderReference

Reference — Snapshot & Signing

Snapshot (EIP‑712 primaryType: Snapshot)

{
  apiId: bytes32,
  seqNo: uint256,
  providerTs: uint64, // unix ms when you produced the snapshot
  ttl: uint64,        // ms (0 = no TTL)
  contentHash: bytes32 // keccak256(canonical JSON)
}

Domain

name: "SylanProviderSnapshot"
version: "1"
chainId: <cfg.chainId>
verifyingContract: <cfg.consensusAddress>

Signature

  • Viem account derived from providerSignerKey
  • Returned as providerSig in your JSON response

Content Hash

contentHash = keccak256(canonicalStringify(payload))
// canonicalStringify: JSON stringify with sorted object keys

Sequence Storage

Sequence numbers are persisted per apiId in ~/.sylan/seq.json. You can change the directory via storageDir in advanced setups.

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ExamplesTroubleshooting