Returns the block hash of a block at the given block height in the best valid chain. ### Arguments | Parameter | Type | Required | Description | |:-------------- |:------:|:--------:|:-------------------------------------------- | | `block_height` | number | Yes | The block height of the requested block hash | ### Response | Parameter | Type | Description | |:---------:|:------:|:-----------------------------------------------------:| | `result` | string | The block hash of the block at the given block height | ### Example ```ignore curl --data-binary '{"jsonrpc": "2.0", "id":"documentation", "method": "getblockhash", "params": [100] }' -H 'content-type: application/json' http://127.0.0.1:3030/ ```