# DefaultEmptyExpirations

> `const` **DefaultEmptyExpirations**: [`Expirations`](/reference/filoz/synapse-core/session-key/type-aliases/expirations/)

Defined in: [packages/synapse-core/src/session-key/permissions.ts:66](https://github.com/FilOzone/synapse-sdk/blob/814a91db8292f1d8fff6df33f7d00bf7e2a5a52a/packages/synapse-core/src/session-key/permissions.ts#L66)