# DEFAULT_CHAIN

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

Defined in: [packages/synapse-sdk/src/utils/constants.ts:9](https://github.com/FilOzone/synapse-sdk/blob/b0bf0dc07b2311e5f7b83f8c375caab729cf187c/packages/synapse-sdk/src/utils/constants.ts#L9)