[**brk-client**](../README.md) *** [brk-client](../globals.md) / RangeBuilder # Interface: RangeBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:1411](https://github.com/bitcoinresearchkit/brk/blob/883b38c77cb9f979692884fd56d9966e0f8ea76b/modules/brk-client/index.js#L1411) ## Type Parameters ### T `T` ## Properties ### fetch > **fetch**: (`onUpdate?`) => `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:1412](https://github.com/bitcoinresearchkit/brk/blob/883b38c77cb9f979692884fd56d9966e0f8ea76b/modules/brk-client/index.js#L1412) 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:1413](https://github.com/bitcoinresearchkit/brk/blob/883b38c77cb9f979692884fd56d9966e0f8ea76b/modules/brk-client/index.js#L1413) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:1414](https://github.com/bitcoinresearchkit/brk/blob/883b38c77cb9f979692884fd56d9966e0f8ea76b/modules/brk-client/index.js#L1414) Thenable