# DEFAULT_CHAIN

> `const` **DEFAULT\_CHAIN**: [`Chain`](/reference/filoz/synapse-sdk/synapse/interfaces/chain/) = `calibration`

Defined in: [packages/synapse-sdk/src/utils/constants.ts:9](https://github.com/FilOzone/synapse-sdk/blob/cd3f9f2f6b560bc180b45b17f586191db84ce83f/packages/synapse-sdk/src/utils/constants.ts#L9)