> For the complete documentation index, see [llms.txt](https://multx.litho.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://multx.litho.ai/integrating-multx-for-cross-chain-staking-and-swaps.md).

# Integrating MultX for Cross-Chain Staking & Swaps

<figure><img src="/files/Fe99o7braI8Uye68h46c" alt=""><figcaption></figcaption></figure>

Now, we’ll enhance the LITHO MultX Protocol with:\
✅ Cross-Chain Staking (Stake LITHO on One Chain, Earn Rewards on Another)\
✅ Cross-Chain Token Swaps (Bridge LITHO & Other Tokens Securely)

***

### 1. How MultX Facilitates Cross-Chain Staking & Swaps <a href="#vzh2d4qq0am4" id="vzh2d4qq0am4"></a>

MultX uses multi-validator schemes to securely process transactions across chains.

#### Cross-Chain Staking Flow <a href="#g0hrmz3rd4ic" id="g0hrmz3rd4ic"></a>

1. User stakes LITHO on Blockchain A.
2. Validators detect and verify the staking event.
3. Relayer forwards staking proof to Blockchain B.
4. Staker earns rewards on Blockchain B.

#### Cross-Chain Swap Flow <a href="#rgymzy82k89v" id="rgymzy82k89v"></a>

1. User sends tokens to a bridge contract on Blockchain A.
2. Validators independently sign and approve the transaction.
3. Once 2 out of 3 validators confirm, relayer executes the transaction on Blockchain B.
4. User receives the equivalent token on Blockchain B.

***

### 2. Implementing Cross-Chain Staking with MultX <a href="#mwf656neubbv" id="mwf656neubbv"></a>

We will create a staking contract that:

●     Accepts LITHO tokens on one chain.

●     Sends staking proof via MultX.

●     Rewards the user on another chain.

#### 2.1 Deploy the Staking Smart Contract <a href="#d5u5bgyh28bb" id="d5u5bgyh28bb"></a>

**CrossChainStaking.sol**

Solidity

```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
contract CrossChainStaking {
    IERC20 public lithoToken;
    address public multxRelayer;
    mapping(address => uint256) public stakedAmount;
    mapping(address => uint256) public rewardAmount;
    event Staked(address indexed user, uint256 amount);
    event RewardsUpdated(address indexed user, uint256 reward);
    event Claimed(address indexed user, uint256 amount);
 
    constructor(address _lithoToken, address _multxRelayer) {
        lithoToken = IERC20(_lithoToken);
        multxRelayer = _multxRelayer;
    }
     function stake(uint256 amount) public {
        require(amount > 0, "Amount must be greater than zero");
 
        lithoToken.transferFrom(msg.sender, address(this), amount);
        stakedAmount[msg.sender] += amount;
       
        emit Staked(msg.sender, amount);
 
        // Send staking data to MultX relayer for cross-chain processing
        (bool success, ) = multxRelayer.call(abi.encodeWithSignature("sendStakingData(address,uint256)", msg.sender, amount));
        require(success, "MultX relayer failed");
    }
        function updateRewards(address user, uint256 reward) public {
        require(msg.sender == multxRelayer, "Only MultX relayer can call this");
        rewardAmount[user] += reward;
        emit RewardsUpdated(user, reward);
    }
    function claimRewards() public {
        uint256 reward = rewardAmount[msg.sender];
        require(reward > 0, "No rewards available");
 
        rewardAmount[msg.sender] = 0;
        lithoToken.transfer(msg.sender, reward);
       
        emit Claimed(msg.sender, reward);
    }
}    
```

***

#### 2.2 MultX Validator Role in Cross-Chain Staking <a href="#q9j5ase2a262" id="q9j5ase2a262"></a>

MultX validators listen for staking events, sign them, and relay the event to the destination chain.

**Modify the MultX Relayer Logic**

Instead of swapping tokens, MultX validators:

1. Monitor staking events.
2. Sign staking transactions & forward them to the relayer.
3. Relayer executes rewards distribution on Blockchain B.

***

#### 2.3 Integrate Cross-Chain Staking in React <a href="#p34xbxadu2q8" id="p34xbxadu2q8"></a>

Modify App.js to interact with the staking contract.

**Update App.js to Handle Staking**

javascript

```javascript
const STAKING_CONTRACT = "0xYourStakingContract";
const stakingAbi = [
    "function stake(uint256 amount) public",
    "function claimRewards() public",
    "function rewardAmount(address user) public view returns (uint256)"
];

const [stakedAmount, setStakedAmount] = useState(0);
const [rewards, setRewards] = useState(0);
 
const checkRewards = async () => {
    const { provider, signer } = await connectWallet();
    const contract = new ethers.Contract(STAKING_CONTRACT, stakingAbi, provider);
    const reward = await contract.rewardAmount(signer.getAddress());
    setRewards(ethers.utils.formatEther(reward));
};
const stakeTokens = async (amount) => {
    const { signer } = await connectWallet();
    const contract = new ethers.Contract(STAKING_CONTRACT, stakingAbi, signer);
    await contract.stake(amount);
    toast.success(`Staked ${amount} LITHO!`);
};
```

**Modify UI to Show Staking & Rewards**

jsx

```jsx
<TextField label="Stake Amount" onChange={(e) => setStakedAmount(e.target.value)} />
<Button variant="contained" onClick={() => stakeTokens(stakedAmount)}>Stake LITHO</Button>
 
<Typography variant="h6">Your Staking Rewards: {rewards} LITHO</Typography>
<Button variant="contained" onClick={checkRewards}>Check Rewards</Button>
<Button variant="contained" onClick={() => stakeTokens(stakedAmount)}>Claim Rewards</Button>
```

***

### 3. Implementing Cross-Chain Token Swaps with MultX <a href="#mv4lmspic73j" id="mv4lmspic73j"></a>

MultX will facilitate secure token swaps between chains.

#### 3.1 Deploy Cross-Chain Swap Smart Contract <a href="#id-9tz3l65dp2fj" id="id-9tz3l65dp2fj"></a>

**CrossChainSwap.sol**

solidity

```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
 
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 
contract CrossChainSwap {
    IERC20 public tokenA;
    IERC20 public tokenB;
    address public multxRelayer;
    
    event SwapInitiated(address indexed user, uint256 amount, address destination);
    event SwapCompleted(address indexed user, uint256 amount);
 
    constructor(address _tokenA, address _tokenB, address _multxRelayer) {
        tokenA = IERC20(_tokenA);
        tokenB = IERC20(_tokenB);
        multxRelayer = _multxRelayer;
    }
    function initiateSwap(uint256 amount, address destination) public {
        require(amount > 0, "Amount must be greater than zero");
 
        tokenA.transferFrom(msg.sender, address(this), amount);
        emit SwapInitiated(msg.sender, amount, destination);
 
        // Send swap data to MultX relayer
        (bool success, ) = multxRelayer.call(abi.encodeWithSignature("sendSwapData(address,uint256,address)", msg.sender, amount, destination));
        require(success, "MultX relayer failed");
    }

    function completeSwap(address user, uint256 amount) public {
        require(msg.sender == multxRelayer, "Only MultX relayer can call this");
        tokenB.transfer(user, amount);
        emit SwapCompleted(user, amount);
    }
}
```

***

#### 3.2 Modify MultX Validators for Token Swaps <a href="#job3vw75ai45" id="job3vw75ai45"></a>

MultX validators will:

1. Monitor token swap transactions.
2. Verify swap signatures.
3. Execute swaps across chains.

***

#### 3.3 Integrate Cross-Chain Swaps in React <a href="#l2uhd5h1nn0a" id="l2uhd5h1nn0a"></a>

**Modify App.js to Handle Swaps**

javascript

```javascript
const SWAP_CONTRACT = "0xYourSwapContract";
const swapAbi = [
    "function initiateSwap(uint256 amount, address destination) public",
    "function completeSwap(address user, uint256 amount) public"
];
const swapTokens = async (amount, destination) => {
    const { signer } = await connectWallet();
    const contract = new ethers.Contract(SWAP_CONTRACT, swapAbi, signer);
    await contract.initiateSwap(amount, destination);
    toast.success(`Swap initiated for ${amount} tokens to ${destination}`);
};
```

**Modify UI for Swaps**

jsx

```jsx
<TextField label="Swap Amount" onChange={(e) => setStakedAmount(e.target.value)} />
<TextField label="Destination Address" onChange={(e) => setRecipient(e.target.value)} />
<Button variant="contained" onClick={() => swapTokens(stakedAmount, recipient)}>Initiate Swap</Button>
```

***

### 4. Features Implemented <a href="#nlihbxt2zj02" id="nlihbxt2zj02"></a>

✅ Cross-Chain Staking with MultX (Stake on one chain, earn rewards on another).\
✅ Cross-Chain Swaps with MultX (Secure multi-validator token swaps).

***

### 5. Next Steps <a href="#anzqiih8mpkb" id="anzqiih8mpkb"></a>

🚀 Future Enhancements:

1. Yield Farming via MultX Staking
2. AI-Powered Swap Optimization (Best Route for Cross-Chain Swaps)
3. Liquidity Pool Staking (Stake LP Tokens for Higher Rewards)

#### Implementing Yield Farming via MultX Staking & AI-Powered Swap Optimization <a href="#vn8nbez3zdrz" id="vn8nbez3zdrz"></a>

Now, we’ll enhance the LITHO MultX Protocol with:\
✅ Yield Farming via MultX Staking (Stake LITHO or LP tokens and earn rewards across chains).\
✅ AI-Powered Swap Optimization (Choose the best route for cross-chain swaps).

***

### 1. Yield Farming via MultX Staking <a href="#l1x3laudfb1k" id="l1x3laudfb1k"></a>

#### 1.1 Overview <a href="#lx4d1wuy6qgg" id="lx4d1wuy6qgg"></a>

●     Users stake LITHO or LP tokens across different chains.

●     MultX relayer processes transactions securely.

●     Automated reward distribution via staking contract.

***

#### 1.2 Deploy Yield Farming Smart Contract <a href="#kkpl2expo7qi" id="kkpl2expo7qi"></a>

Modify CrossChainYieldFarming.sol:

solidity

<pre class="language-solidity"><code class="lang-solidity">// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
 
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 
contract CrossChainYieldFarming {
    IERC20 public stakingToken;
    IERC20 public rewardToken;
    address public multxRelayer;
    uint public rewardRate;
 
    mapping(address => uint) public stakedBalance;
    mapping(address => uint) public lastUpdate;
    mapping(address => uint) public rewards;
    
    event Staked(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event RewardsClaimed(address indexed user, uint256 amount);
    
    constructor(address _stakingToken, address _rewardToken, address _multxRelayer, uint _rewardRate) {
        stakingToken = IERC20(_stakingToken);
        rewardToken = IERC20(_rewardToken);
        multxRelayer = _multxRelayer;
        rewardRate = _rewardRate;
    } 
    
    function stake(uint256 amount) public {
        require(amount > 0, "Amount must be greater than zero");
 
        stakingToken.transferFrom(msg.sender, address(this), amount);
        updateRewards(msg.sender);
 
        stakedBalance[msg.sender] += amount;
        lastUpdate[msg.sender] = block.timestamp;
       
        emit Staked(msg.sender, amount);
<strong>        
</strong><strong>        // Send staking data to MultX relayer for cross-chain processing
</strong>        (bool success, ) = multxRelayer.call(abi.encodeWithSignature("sendStakingData(address,uint256)", msg.sender, amount));
        require(success, "MultX relayer failed");
    }
 
    function updateRewards(address user) internal {
        if (stakedBalance[user] > 0) {
            uint timeElapsed = block.timestamp - lastUpdate[user];
            rewards[user] += timeElapsed * rewardRate * stakedBalance[user] / 1e18;
        }
        lastUpdate[user] = block.timestamp;
    }
    
    function withdraw(uint256 amount) public {
        require(stakedBalance[msg.sender] >= amount, "Insufficient balance");
 
        updateRewards(msg.sender);
        stakedBalance[msg.sender] -= amount;
        stakingToken.transfer(msg.sender, amount);
 
        emit Withdrawn(msg.sender, amount);
    }
    function claimRewards() public {
        updateRewards(msg.sender);
        uint256 reward = rewards[msg.sender];
        require(reward > 0, "No rewards available");
 
        rewards[msg.sender] = 0;
        rewardToken.transfer(msg.sender, reward);
 
        emit RewardsClaimed(msg.sender, reward);
    }
}
</code></pre>

***

#### 1.3 Integrate Yield Farming in React <a href="#q8ri36r21zw4" id="q8ri36r21zw4"></a>

Modify App.js to interact with the yield farming contract.

**Update App.js to Handle Staking & Rewards**

javascript

```javascript
const YIELD_FARMING_CONTRACT = "0xYourYieldFarmingContract";
const yieldFarmingAbi = [
    "function stake(uint256 amount) public",
    "function withdraw(uint256 amount) public",
    "function claimRewards() public",
    "function rewards(address user) public view returns (uint256)"
];
 
const [stakedAmount, setStakedAmount] = useState(0);
const [rewards, setRewards] = useState(0);
 
const checkRewards = async () => {
    const { provider, signer } = await connectWallet();
    const contract = new ethers.Contract(YIELD_FARMING_CONTRACT, yieldFarmingAbi, provider);
    const reward = await contract.rewards(signer.getAddress());
    setRewards(ethers.utils.formatEther(reward));
};

const stakeTokens = async (amount) => {
    const { signer } = await connectWallet();
    const contract = new ethers.Contract(YIELD_FARMING_CONTRACT, yieldFarmingAbi, signer);
    await contract.stake(amount);
    toast.success(`Staked ${amount} tokens!`);
};
 
```

**Modify UI for Yield Farming**

jsx

```jsx
<TextField label="Stake Amount" onChange={(e) => setStakedAmount(e.target.value)} />
<Button variant="contained" onClick={() => stakeTokens(stakedAmount)}>Stake Tokens</Button>
 
<Typography variant="h6">Your Farming Rewards: {rewards} Tokens</Typography>
<Button variant="contained" onClick={checkRewards}>Check Rewards</Button>
<Button variant="contained" onClick={() => stakeTokens(stakedAmount)}>Claim Rewards</Button>
```

***

### 2. AI-Powered Swap Optimization <a href="#id-7t1cjsxoh8h6" id="id-7t1cjsxoh8h6"></a>

#### 2.1 Overview <a href="#id-38zdbphdpt6w" id="id-38zdbphdpt6w"></a>

●     AI analyzes past transactions to predict best swap routes.

●     Uses TheGraph for real-time liquidity data.

●     Helps users choose the cheapest and fastest path.

***

#### 2.2 Implement AI-Powered Swap Algorithm <a href="#smgmqzcq2xte" id="smgmqzcq2xte"></a>

**Fetch Swap Data via TheGraph**

Modify App.js:

javascript

```javascript
const fetchSwapData = async () => {
    const query = `
    {
        swaps(first: 10, orderBy: timestamp, orderDirection: desc) {
            id
            fromToken
            toToken
            amountIn
            amountOut
            gasFee
            executionTime
        }
    }`;
    const response = await fetch("https://api.thegraph.com/subgraphs/name/litho/swaps", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ query })
    });

    const data = await response.json();
    return data.data.swaps;
};
```

***

#### 2.3 AI Model to Predict Best Swap Route <a href="#f2i5yw520hh3" id="f2i5yw520hh3"></a>

We use TensorFlow\.js to analyze past swap efficiency.

**Install TensorFlow\.js**

bash

```bash
npm install @tensorflow/tfjs
```

**Modify App.js to Use AI for Swap Predictions**

javascript

```javascript
import * as tf from "@tensorflow/tfjs";
 
const predictBestSwapRoute = async (pastSwaps, amountIn) => {
    const inputSwaps = pastSwaps.map(swap => [swap.amountIn, swap.gasFee, swap.executionTime]);
    const outputRoutes = pastSwaps.map(swap => swap.amountOut);
 
    // Convert data into tensors
    const xs = tf.tensor2d(inputSwaps);
    const ys = tf.tensor1d(outputRoutes, "float32");
// Create AI model
    const model = tf.sequential();
    model.add(tf.layers.dense({ units: 3, inputShape: [3], activation: "relu" }));
    model.add(tf.layers.dense({ units: 1, activation: "linear" }));

    model.compile({ optimizer: "adam", loss: "meanSquaredError" });
 
    // Train the model
    await model.fit(xs, ys, { epochs: 50 });
 
    // Predict the best swap route
    const prediction = model.predict(tf.tensor2d([[amountIn, 0.005, 2]]));
    return prediction.dataSync()[0]; // Return predicted output
};  
```

***

#### 2.4 Modify UI to Show AI-Powered Swap Routes <a href="#etkp5gclxqzn" id="etkp5gclxqzn"></a>

jsx

```jsx
<Button variant="outlined" color="secondary" onClick={async () => {
    const pastSwaps = await fetchSwapData();
    const bestRoute = await predictBestSwapRoute(pastSwaps, stakedAmount);
    toast.info(`AI suggests swapping for: ${bestRoute} Tokens`);
}}>
    Get AI Swap Recommendation
</Button>
```

***

### 3. Features Implemented <a href="#id-4rbwj0kj4xtb" id="id-4rbwj0kj4xtb"></a>

✅ Yield Farming via MultX Staking (Stake across chains and earn rewards).\
✅ AI-Powered Swap Optimization (Predicts the best token swap route).

***

### 4. Next Steps <a href="#id-86b15dbyl077" id="id-86b15dbyl077"></a>

🚀 Future Enhancements:

1. Cross-Chain Governance Farming (DAO Participation Rewards)
2. Decentralized Lending with Cross-Chain Collateral
3. Auto-Rebalancing Yield Strategies with AI