[**brk-client**](../README.md) *** [brk-client](../globals.md) / SeriesTree\_Indexes\_Epoch # Interface: SeriesTree\_Indexes\_Epoch Defined in: [Developer/brk/modules/brk-client/index.js:6090](https://github.com/bitcoinresearchkit/brk/blob/1a706da13cc492eee123fc28fd358f02b56918b6/modules/brk-client/index.js#L6090) ## Properties ### firstHeight > **firstHeight**: [`SeriesPattern17`](../type-aliases/SeriesPattern17.md)\<`number`\> Defined in: [Developer/brk/modules/brk-client/index.js:6091](https://github.com/bitcoinresearchkit/brk/blob/1a706da13cc492eee123fc28fd358f02b56918b6/modules/brk-client/index.js#L6091)