[**brk-client**](../README.md) *** [brk-client](../globals.md) / SeriesTree\_Indexes\_Epoch # Interface: SeriesTree\_Indexes\_Epoch Defined in: [Developer/brk/modules/brk-client/index.js:5537](https://github.com/bitcoinresearchkit/brk/blob/bdc3ba1df62c3c70339afe14f39c8c9a5a094c37/modules/brk-client/index.js#L5537) ## Properties ### firstHeight > **firstHeight**: [`SeriesPattern17`](../type-aliases/SeriesPattern17.md)\<`number`\> Defined in: [Developer/brk/modules/brk-client/index.js:5538](https://github.com/bitcoinresearchkit/brk/blob/bdc3ba1df62c3c70339afe14f39c8c9a5a094c37/modules/brk-client/index.js#L5538)