# 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/b36c8f99c6e2a9d4d60368a773e5052e196cb6e5/packages/synapse-sdk/src/utils/constants.ts#L9)