# 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/0c729dad461472f017e4d84f8e6ac16e6afbe7c0/packages/synapse-sdk/src/utils/constants.ts#L9)