Store Cookie

Configuration 0x0A, server → client.

config · 0x0A · clientbound (server → client)

Asks the client to store a cookie (key plus up to 5120 bytes of payload). The client keeps it for the current server and sends it back when a CookieRequest for that key arrives, including after a Transfer.

Sent by the server, read by the client. Listen for it with client.on("StoreCookie", (data) => …) on the receiving side.

Fields

Field	Type	Notes
`key`	String
`value`	Byte[]	also `payload`

Send it

await client.sendPacket("StoreCookie", {
  key: "example:session",
  value: Buffer.from("opaque session data"),
});

Cookie keys are namespaced identifiers and values may contain at most 5120 bytes. Treat the value as opaque bytes; payload is accepted as an alias for value.

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: src/Core/Versions/776/Packets/config/clientbound/StoreCookie.ts