# 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/d2725be576fc57fac19e7c64cd8e004e0cec85d3/packages/synapse-sdk/src/utils/constants.ts#L9)