[**brk-client**](../README.md) *** [brk-client](../globals.md) / RangeBuilder # Interface: RangeBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:1478](https://github.com/bitcoinresearchkit/brk/blob/75a97b4da99e60fce9ac789d118004f9b3db3ee5/modules/brk-client/index.js#L1478) ## Type Parameters ### T `T` ## Properties ### fetch > **fetch**: (`onUpdate?`) => `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:1479](https://github.com/bitcoinresearchkit/brk/blob/75a97b4da99e60fce9ac789d118004f9b3db3ee5/modules/brk-client/index.js#L1479) 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:1480](https://github.com/bitcoinresearchkit/brk/blob/75a97b4da99e60fce9ac789d118004f9b3db3ee5/modules/brk-client/index.js#L1480) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:1481](https://github.com/bitcoinresearchkit/brk/blob/75a97b4da99e60fce9ac789d118004f9b3db3ee5/modules/brk-client/index.js#L1481) Thenable