[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/Protocol](https://evolu.dev/docs/api-reference/common/local-first/Protocol) › applyProtocolMessageAsRelay

```ts
function applyProtocolMessageAsRelay(
  inputMessage: Uint8Array,
  options?: ApplyProtocolMessageAsRelayOptions,
  version?: number & Brand<"Int"> & Brand<"NonNegative">,
): Task<
  ApplyProtocolMessageAsRelayResult,
  ProtocolInvalidDataError,
  StorageDep
>;
```

Defined in: [packages/common/src/local-first/Protocol.ts:1096](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/Protocol.ts#L1096)