API reference > @kontsedal/olas-cross-tab > PROTOCOL_VERSION

PROTOCOL_VERSION variable

Wire protocol for @kontsedal/olas-cross-tab messages. SPEC §13.2.

v (protocol version) and sourceId (unique per root) combine to make the three-layer echo prevention work:

1. The sender mirrors only the app's own writes: a write the plugin applied from a peer carries the plugin's name as its origin, so it is never sent back. 2. Receiver filters its own sourceId (catches the case where the transport echoes the message back to the sender). 3. Receiver dedupes by (sourceId, msgId) — duplicate or out-of-order messages from the same peer are dropped.

Receivers also drop messages with a v they don't understand. The channel name itself is user-supplied; consumers who want clean cross-deploy isolation should embed a version in their channelName.

Signature:

PROTOCOL_VERSION = 1