Cast (smart contract)

Interact with DSA on smart contract level

This guide will show you how to interact with DSA on the smart contract level.

Quick setup

pragma solidity ^0.8.3;import "hardhat/console.sol";import "@openzeppelin/contracts/token/ERC20/IERC20.sol";interface IInstaIndex {    function build(        address _owner,        uint256 _accountVersion,        address _origin    ) external returns (address _account);}interface IDSA {    function cast(        string[] calldata _targetNames,        bytes[] calldata _datas,        address _origin    ) external payable returns (bytes32);}contract InteractingDSA {    IInstaIndex instaIndex = IInstaIndex(0x2971adfa57b20e5a416ae5a708a8655a9c74f723); // this address is only of mainnet.    function buildAndCast(address _owner) external {        // creating an account        address _account = instaIndex.build(_owner, 2, address(0)); // 2 is the most recent DSA version                // encoding data to run multiple things through cast on account        // Depositing in DSA and then deposit in Compound through DSA.        string[] memory _targets = new string[](2);        bytes[] memory _data = new bytes[](2);                _targets[0] = "BASIC-A";        _targets[1] = "COMPOUND-A";                bytes4 memory basicDeposit = bytes4(keccak256("deposit(address,uint256,uint256,uint256)"));        bytes4 memory compoundDeposit = bytes4(keccak256("deposit(string,uint256,uint256,uint256)"));                address dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F;        uint amtToDeposit = 1e18; // 1 DAI                _data[0] = abi.encodeWithSelector(basicDeposit, dai, amtToDeposit, 0, 0);        _data[1] = abi.encodeWithSelector(compoundDeposit, "DAI-A", amtToDeposit, 0, 0);                IDSA(_account).cast(_targets, _data, address(0)); // Magic!!    }}

Now we can start interacting with the DSA contract. Go to Networks to find each chain-related address.

Go to Networks to find each chain-related address.

Usage

This is the Main Contract for all the Defi Smart Accounts. Used to create a new Defi Smart Account for a user and run a cast function in the new smart account.

This contract contains most core functions of smart account name cast(). It is only called by owners of smart accounts and has full-fledge access over the smart account. Used also to access all the DSA.

Create a DSA Account using this function. It returns the address of the DSA account created.

parametertypedescription
owneraddressOwner of the Smart Account
accountversionuint256Account Module version
_originaddressWhere Smart Account is created

Using cast() user can access the connectors, which allows the smart account to interact with protocols or set up any settings on the smart account.

parametertypedescription
_targetstringstring array mentioning connectors, encoded data
_datasbytesencoded data containing function abi and params

DSA Setup

Inside the interactingDSA contract, we will create a DSA account and use that to cast a spell.

Creating InstaIndex instance

IInstaIndex instaIndex = IInstaIndex(0x2971adfa57b20e5a416ae5a708a8655a9c74f723);

Creating DSA account

address _account = instaIndex.build(_owner, 2, address(0));

Casting Spell

Spells denote a sequence of connector functions that will achieve a given use case. Spells can comprise any number of tasks across any number of connectors.

 IDSA(_account).cast(_targets, _data, address(0));

We create an InstaIplementationM1 contract instance using our DSA account and then cast function to cast the spell.

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