> For the complete documentation index, see [llms.txt](https://docs.bbscoin.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bbscoin.org/development-integration/daemon-node-api/json-rpc-request/on_getblockhash.md).

# on\_getblockhash

### Input

| Argument | Mandatory | Description  | Format          |
| -------- | --------- | ------------ | --------------- |
|          | yes       | Block height | array of uint64 |

### Output

| Argument | Description | Format |
| -------- | ----------- | ------ |
|          | Block hash  | string |