# LYNC Metamask PC SDK

LYNC Metamask Wallet SDK is a one-stop solution for game developers to easily integrate Metamask into their game engine and deploy their game on multiple networks with just a few clicks. This SDK allows game developers to monitor gamers’ data via LYNC analytics system and update the SDK without leaving the game engine.

<figure><img src="/files/jDlzslJ7Aqd3paGIkJf0" alt=""><figcaption><p>Integrate Metamask wallet inside any game using LYNC SDK</p></figcaption></figure>

## Get Your API Key&#x20;

Please get your API key before downloading the SDK from [**here**](https://dashboard.lync.world/auth/login)

## Installation

Download the LYNC - Metamask Wallet SDK from [**here**](https://github.com/LYNC-WORLD/Metamask-Unity-PC-SDK/releases)

Example Project- <https://github.com/LYNC-WORLD/Metamask-Unity-PC-SDK>

Import the SDK .unitypackage file to your project. or simply drag and drop .unitypackage file to your project.

<figure><img src="/files/WKpr8TZQ2Hc38raIfTxY" alt="" width="561"><figcaption><p>Assets -> Import Package -> Custom Package</p></figcaption></figure>

Once the Metamask PC SDK package has finished importing into your Unity project, you can begin integrating it into your game. To do this, open the **Metamask** scene provided by the LYNC - Metamask SDK.\
\
&#x20;                                            **Path : Assets ->LYNC -> Metamask**

<figure><img src="/files/CjGLUr4dOcRLDedhZBEY" alt=""><figcaption><p><strong>Assets ->LYNC -> Metamask</strong></p></figcaption></figure>

## Choose blockchain network&#x20;

{% hint style="info" %}
If you haven't generated an API Key, please check [#get-your-api-key](#get-your-api-key "mention")
{% endhint %}

the After opening **Metamask** scene, Go to **LYNC Manager.** In the "Inspector" window, go to the API key & Enter the **API key**.&#x20;

<figure><img src="/files/mOQovM2xBQyzydhf3Maf" alt=""><figcaption><p>Enter the API key</p></figcaption></figure>

To choose the blockchain network, simply go to the **Network** drop-down menu and pick the network of your preference to deploy your game on.

<figure><img src="/files/PKKFpprdXbmJBBlsqYow" alt=""><figcaption><p>LYNC Manager -> Network</p></figcaption></figure>

## Integrating the Transaction Layer

The Transactions are divided into 2 parts:

1. No Code Transactions
2. Modular Transactions

#### No-code Transaction![image.png](https://files.slack.com/files-tmb/T057H0P2RJ6-F07SXLZMG4S-2de4ecf691/image_480.png)

<figure><img src="/files/V9DRktQEWBwtlSv3u2OJ" alt=""><figcaption><p>LYNC Intigration Example</p></figcaption></figure>

Check the **LYNCIntigrationExample** GameObject, you can just pass in a few parameters to write on any custom contract inside the game.

Just pass the following parameters:

1. Contract Address - Type any contract address on the chain you selected in the LYNCInterface GameObject.
2. ABI - You can get the contract ABI of a verified contract on the explorer.<br>

   <figure><img src="/files/5T4buGzSfStpIYMHF0MP" alt="" width="563"><figcaption><p>Copy ABI from explorer</p></figcaption></figure>
3. Function Name - Write the exact function name from the contract
4. Arguments - The arguments required by the transaction, are left blank if none.

#### Modular Transactions

Check the TransactionExample GameObject, it has a TransactionExample.cs file attached. \
This example contains 3 types of transaction transactions, ERC-721, ERC-1155 and ERC-20.

<figure><img src="/files/n9I3207kBB6PqorXd3aM" alt=""><figcaption><p>Example Code</p></figcaption></figure>

In this example:

1. contractAddress - is the contract address for a custom transaction. [(In this case, it's a Sepolia contract address on Ethereum Testnet)](https://sepolia.etherscan.io/address/0x79107ad6bd949bd955640fc1c861a2d2909e2bbd)
2. ABI - [You can get the ABI from Contract(Code)](https://sepolia.etherscan.io/address/0x79107ad6bd949bd955640fc1c861a2d2909e2bbd#code)
3. functionName - Write the exact function name from the contract [(In this case, sendToken)](https://sepolia.etherscan.io/address/0x79107ad6bd949bd955640fc1c861a2d2909e2bbd#writeContract)
4. cost - The cost required to do the transaction, if it's free you can pass 0 else pass the value in wei. (In this case, as the function is not payable the value is 0).
5. ParametersOfFunctions - You can pass in the arguments required for the transaction. (In this example, the argument is how much amount you want to send, [1000 is the value in wei, i.e 0.000000000000001 eth.](https://eth-converter.com/) You can pass n number of arguments separated with a comma( , ) ).
6. args - Converts compatible to be a JSON

Congratulation, you have successfully integrated the Metamask wallet with your favourite blockchain network using LYNC SDK. \
\
NOTE: If you wish to use wallet address inside game after user's wallet is connected, use:

```
PlayerPrefs.GetString("WalletAddress");
```

If you face any error in ABI, then open in JSON Format and select result as ABI.

<figure><img src="/files/UZCVBPF6Pi4nG8LTw2Xe" alt=""><figcaption><p>Open in JSON Format</p></figcaption></figure>

<figure><img src="/files/TSghx7TjCvic9IfeAtFV" alt=""><figcaption><p>Copy the Result</p></figcaption></figure>


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