> For the complete documentation index, see [llms.txt](https://web3navigators.gitbook.io/product-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://web3navigators.gitbook.io/product-docs/developer-docs/smart-contracts/nexus-bridge-dai.md).

# Nexus Bridge DAI

Nexus Bridge DAI allows a rollup to deposit the DAI locked in the rollup bridge to the DSR saving contract from MakerDAO and earn yields. These are the functions used to enable the feature:

1. **Deposit DAI**: This function deposits the DAI on rollup bridge to the Maker DAO DSR contract. It is an automated action that takes place whenever a user deposits DAI to the rollup

   ```solidity
   function depositDai(uint256 amountSave)
   ```

2. **Remove DAI**: This function removes DAI from the DSR contract and gives it back to the user whenever they claim the DAI from the bridge

   ```solidity
   function removeDai(address user, uint256 amountRedeem)
   ```

3. **Claim Rewards DAI**: This function is used by the rollup governance to claim and utilize the DSR rewards

   ```solidity
   function claimRewardsDAI(address address_to_send)
   ```

*<mark style="color:blue;">The design architectures for DAI can be customized in a similar manner to ETH, which is detailed</mark>* [*<mark style="color:blue;">here</mark>*](/product-docs/developer-docs/smart-contracts/nexus-bridge-eth/different-nexus-bridge-architecture.md)