# DEFAULT_RUNWAY_EPOCHS > `const` **DEFAULT\_RUNWAY\_EPOCHS**: `0n` = `0n` Defined in: [packages/synapse-core/src/utils/constants.ts:137](https://github.com/FilOzone/synapse-sdk/blob/98d51d3144300a5bf7f6471621b5243e98f97aae/packages/synapse-core/src/utils/constants.ts#L137) Default extra runway in epochs beyond the required lockup. 0n means no additional runway beyond the lockup period.