# 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/1a1d16a73ad5da89c80d6276a9c9ad8af2ec33fd/packages/synapse-sdk/src/utils/constants.ts#L9)