# 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/455d3d6682c9fa709c86addf9981c7b974f41ea5/packages/synapse-core/src/session-key/permissions.ts#L66)