# DefaultEmptyExpirations

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

Defined in: [packages/synapse-core/src/session-key/permissions.ts:54](https://github.com/FilOzone/synapse-sdk/blob/2a86dcd351d444b2bdc16467315429ced8fb506b/packages/synapse-core/src/session-key/permissions.ts#L54)