# 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/ce46a7c7064e0127711218b664e222c63ce5d42e/packages/synapse-sdk/src/utils/constants.ts#L9)