# Railgun ### Overview Railgun is a privacy-focused smart contract system that allows users to shield their cryptocurrency transactions on Ethereum. It uses ZK proofs to enable private transactions, where the transaction details (such as amounts and addresses) are hidden from public view while maintaining security and integrity. The Railgun Dune query can be found [here](https://dune.com/queries/3902794). ### Query Structure The query filters transactions sent to the RailgunSmartWallet [contract](https://etherscan.io/address/0xc0bef2d373a1efade8b952f33c1370e486f209cc) that were successful and invoke the transact function. ### Calculations * The proof volume is the sum of transact function calls * The cost is calculated using the following formula: * $$\text{cost} = \sum\_{\text{txns}} \left( \text{gas\_used} \times \text{gas\_price} \times \text{eth\_price} \right)$$ * Where: * $$\text{gas\_used}$$ is the amount of gas consumed by the transaction * $$\text{gas\_used}$$ is temporarily hardcoded to an amount from example transactions * $$\text{gas\_price}$$ is the price of gas on the day of the transaction * $$\text{eth\_price}$$ is the average price of ETH in USD on the day of the transaction --- # 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://standard-crypto.gitbook.io/zkstats/projects/railgun.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.