susheel kumar

Posted on May 12

Introducing payx3: The All-in-One SDK to Simplify Multi-Chain Crypto Payments

#cryptocurrency #blockchain #showdev #web3

In the rapidly evolving world of Web3, developers face a persistent headache: fragmentation. If you want to accept Bitcoin, you need one library. For Ethereum, another. For Solana, yet another. Managing multiple chains, tracking different token decimals, and monitoring transaction confirmations usually results in a bloated, unmaintainable codebase.

Enter payx3—a powerful, lightweight Multi-Chain Crypto Payment SDK designed to let you generate wallets and watch for incoming payments across almost any major chain with a single function call.

🚀 Why payx3?

The goal of payx3 is simple: Reduce the complexity of crypto integrations to zero. Whether you are building an e-commerce checkout, a donation platform, or a decentralized app, payx3 handles the heavy lifting of blockchain monitoring so you can focus on your product.

Key Features:

Universal Wallet Generation: Generate a single 12-word mnemonic and derive addresses for Bitcoin (Legacy, SegWit, Native SegWit), Solana, and all EVM chains (ETH, BNB, Polygon, etc.).
"Watch Everything" Mode: A single function to monitor BTC, ETH, SOL, and dozens of ERC-20 tokens simultaneously.
Decimal Perfection: No more math errors. payx3 automatically handles decimal conversions (like the 6-decimal USDT on Ethereum vs. 18-decimal on BNB Chain).
Real-time Callbacks: Get instant notifications when a payment is detected (onPayment) and when it is finalized on the block (onConfirmed).
REST API Ready: It comes with a built-in Express.js server example, allowing you to run your own payment gateway in minutes.

🛠 Quick Start

Getting started is as easy as installing the package:

npm install payx3

One Wallet, All the Chains

You don't need separate setups for different assets. Generate a master key and get all your addresses at once:

const { generateMnemonic, deriveAll } = require("payx3");

const mnemonic = generateMnemonic(128);
const wallet = await deriveAll(mnemonic);

console.log("BTC Address:", wallet.bitcoin[2].address); // Native SegWit
console.log("EVM Address:", wallet.evm.address);         // ETH, BNB, Polygon, etc.
console.log("SOL Address:", wallet.solana.address);

Monitoring Payments

Forget complex WebSockets or polling logic. Use watchAll to monitor every asset you care about across every supported chain in one go:

const { watchAll } = require("payx3");

watchAll({
  btcAddress: "bc1q...",
  evmAddress: "0x...",
  solAddress: "Azj...",
  infuraKey: "YOUR_INFURA_KEY",
  onPayment: (payment) => {
    console.log(`💸 Received ${payment.amount} ${payment.symbol} on ${payment.chain}!`);
  }
});

📦 Supported Assets

Payx3 v2.0.0 supports a massive range of assets out of the box:

Native: BTC, ETH, BNB, MATIC, AVAX, SOL.
Layer 2s: Arbitrum (ARB), Optimism (OP).
Stablecoins: USDT, USDC, DAI.
DeFi & More: WBTC, LINK, UNI, AAVE, SHIB.
Custom Tokens: Watch any ERC-20 token by simply providing its contract address.

🔒 Security First

We know that in crypto, security is everything.

Read-Only Monitoring: The "watch" functions only require public addresses. You never need to expose your private keys to a live server to track payments.
Stateless: payx3 doesn't store your data. You control your mnemonic and your infrastructure.

💼 Open to Work

The creator of payx3, Susheel, is a blockchain enthusiast and developer currently open to new opportunities. If you’re looking for a freelancer or a full-time expert in Web3, Node.js, or Full-stack development, feel free to reach out!

Email: susheelhbti@gmail.com
NPM: payx3 on npm

Conclusion

Stop fighting with multiple libraries and inconsistent APIs. Whether you're a seasoned Web3 dev or just starting, payx3 provides the streamlined workflow you've been looking for.

Ready to build? Check out the (https://www.npmjs.com/package/payx3) and start accepting payments today!

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