Metamask: How to use Metamask input data to swap

Using MetaMask’s Input Data to Swap NFTs without ABI

When it comes to swapping non-fungible tokens (NFTs) on the blockchain, one of the most common challenges is accessing the input data required by the swap protocol. In this article, we’ll explore a potential solution that allows developers to use MetaMask’s input data to automate the swap process using the MetaSwap protocol.

Background

MetaSwap is an open-source, decentralized NFT trading platform built on top of the Solana blockchain. It provides a set of APIs and tools for developers to interact with the platform programmatically. One of these APIs is the swap function, which allows users to swap one NFT for another using their MetaMask wallet.

The Problem

Unfortunately, MetaSwap does not provide an inputData object or a similar mechanism to access the input data required by the swap protocol. This means that developers need to manually extract and send the necessary information from their MetaMask wallet using external APIs or libraries.

The Solution: Using Web3.js and MetaMask’s Input Data

To overcome this challenge, we’ll focus on building an automated solution using Web3.js and MetaMask’s input data. Here’s a step-by-step guide:

• Install Web3.js: First, install the Web3.js library using npm or yarn:

npm install web3

• Get MetaMask’s Input Data: Use MetaMask’s eth_getTransactionReceipt method to retrieve the transaction receipt for your current transaction. You’ll need this data to send the necessary input information.

const web3 = require('web3');

const metaMask = new web3.Web3(new Web3.providers.HttpProvider('

const transactionReceipt = metaMask.eth.getTransactionReceipt(txid);

• Extract Input Data: Use the transactionReceipt object to extract the input data for your swap transaction. You’ll need to look up specific fields, such as the from, to, and value addresses.

const fromAddress = transactionReceipt.contractAddress;

const fromValue = txParam.address;

• Create a Swap Function: Write a new function that takes the extracted input data and uses it to create a swap request using MetaSwap’s API.

Example Code

Here’s an example code snippet that demonstrates how to use Web3.js, MetaMask’s input data, and the MetaSwap API:

async function swapNFTs(fromAddress, toAddress, value) {

  const transactionParam = {

    address: fromAddress,

    amount: value,

    gasPrice: 20.00, // in wei

    gasLimit: 3000000, // inwei

    nonce: web3.eth.getTransactionCount(fromAddress),

    data: ''

  };


  try {

    const result = await metaMask.web3.eth.sendRawTransaction(transactionParam);

    const transactionReceipt = await metaMask.web3.eth.getTransactionReceipt(result.rawTransactionHash);

    return { from: transactionReceipt.contractAddress, to: toAddress, value };

  } catch (error) {

    console.error(error);

    throw error;

  }

}

Conclusion

By using MetaMask’s input data and Web3.js, developers can automate the swap process for NFTs without needing to access the ABI object. This solution provides a scalable and efficient way to interact with the MetaSwap protocol, making it easier to integrate with other platforms.

Please note that this is just an example code snippet and may require modifications to work in your specific use case. Additionally, be sure to keep your MetaMask private key and transaction data secure to prevent unauthorized access.

I hope this article provides a helpful solution for developers looking to automate the swap process using Metamask input data!

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