> For the complete documentation index, see [llms.txt](https://docs.hivesql.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hivesql.io/technical-informations/operations/txfeeds.md).

# TxFeeds

#### Blockchain operations

* feed\_publish

#### Columns

| Name                  | Description                                    |
| --------------------- | ---------------------------------------------- |
| publisher             | witness account publishing a price feed update |
| exchange\_rate\_base  | HBD price on exchanges                         |
| exchange\_rate\_quote | HIVE price on exchanges                        |

#### Description

Witnesses regularly publish a price feed that enables the blockchain to calculate a conversion ratio between HBD and HIVE.