# Price Data Feed ## tldr; You can get the **rock.rETH:ETH** exchange rate here: ## Overview The price of a vault share represents the value of the underlying asset the share is a claim on. ### USD For example if 1 **rock.rETH** share is worth 1.05 **rETH** and rETH/USD = $5,000 **USD**, then 1 rock.rETH = 1.05 x $5,000 = $5,250. Conversely that means 1 **rETH** = 0.95238 **rock.rETH** (1/1.05). ### ETH Similarly for ETH, if 1 **rock.rETH** share is worth 1.05 rETH and 1 **rETH** = 1.1443 **ETH** then 1 rock.rETH = 1.05 x 1.1443 = 1.201515 ETH ## Integration For integration with RockSolid vaults, there are a number of ways to source pricing, both on-chain and via API. ### On-chain #### Rate Provider The simplest way to calculate **rock.rETH** exchange rates is to use the Balancer rate provider deployed [here](https://etherscan.io/address/0x716f0c5453099690b54e7b72d9491a72b8df445e#readContract#F1). That returns the **rock.rETH:ETH** exchange rate in wei. For example, at the time of writing it is 1161699563412314198 which when [converted](https://etherscan.io/unitconverter?wei=1161699563412314198) to ETH is 1.16. I.e. 1 rock.rETH = 1.16 ETH. For display, you would source ETH/USD from your preferred provider #### ERC-4626 style calculation To obtain the value 1 rock.rETH share in the underlying asset rETH purely from the smart contract, you can use standard ERC-4626 methods. You convert an amount of shares to assets and divide by the scale of the underlying. To obtain rock.rETH to rETH it would be: * `convertToAssets(10 ** vault.decimals()) / 10 ** underlyingAsset.decimals()` For USD, simply multiple by the rETH/USD exchange rate ### API We don't currently provide exchange rates via API. Please reach out at [product@rocksolid.network](mailto:undefined) if you need this. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.rocksolid.network/integration/price-data-feed.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.