[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) › createProtocolMessageForSync

```ts
function createProtocolMessageForSync(
  deps: StorageDep & ConsoleDep,
): (
  ownerId: string & Brand<"Id"> & Brand<"OwnerId">,
  subscriptionFlag?: SubscriptionFlag,
) => ProtocolMessage | null;
```

Defined in: [packages/common/src/local-first/Protocol.ts:550](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/Protocol.ts#L550)

Creates a [ProtocolMessage](https://evolu.dev/docs/api-reference/common/local-first/Protocol/type-aliases/ProtocolMessage) for sync.