[**brk-client**](../README.md) *** [brk-client](../globals.md) / SeriesTree\_Indexes\_Epoch # Interface: SeriesTree\_Indexes\_Epoch Defined in: [Developer/brk/modules/brk-client/index.js:6154](https://github.com/bitcoinresearchkit/brk/blob/c85da92cbcb3b8645b12f2986df719688adb8dff/modules/brk-client/index.js#L6154) ## Properties ### firstHeight > **firstHeight**: [`SeriesPattern17`](../type-aliases/SeriesPattern17.md)\<`number`\> Defined in: [Developer/brk/modules/brk-client/index.js:6155](https://github.com/bitcoinresearchkit/brk/blob/c85da92cbcb3b8645b12f2986df719688adb8dff/modules/brk-client/index.js#L6155)