[**brk-client**](../README.md) *** [brk-client](../globals.md) / RangeBuilder # Interface: RangeBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:1420](https://github.com/bitcoinresearchkit/brk/blob/41ec24c81e5075cce1fd92557af02306ad5e61c7/modules/brk-client/index.js#L1420) ## Type Parameters ### T `T` ## Properties ### fetch > **fetch**: (`onUpdate?`) => `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:1421](https://github.com/bitcoinresearchkit/brk/blob/41ec24c81e5075cce1fd92557af02306ad5e61c7/modules/brk-client/index.js#L1421) Fetch the range #### Parameters ##### onUpdate? (`value`) => `void` #### Returns `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> *** ### fetchCsv > **fetchCsv**: () => `Promise`\<`string`\> Defined in: [Developer/brk/modules/brk-client/index.js:1422](https://github.com/bitcoinresearchkit/brk/blob/41ec24c81e5075cce1fd92557af02306ad5e61c7/modules/brk-client/index.js#L1422) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:1423](https://github.com/bitcoinresearchkit/brk/blob/41ec24c81e5075cce1fd92557af02306ad5e61c7/modules/brk-client/index.js#L1423) Thenable