How does x402 enable payments without gas fees?

The x402 client signs EIP-3009 standard data according to the EIP-712 format. Another name for EIP-3009 is TransferWithAuthorization. This enables gasless transfers within x402

Custom Errors in Solidity: A Gas-Efficient Alternative

Custom errors are a new feature in Solidity v0.8.4 that allow developers to define custom error types.

How to Reduce Smart Contract Size

We can reduce smart contract size from EIP-170.

Implementation of Multi-Party Matching Trade using Smart Contract

The advantages and disadvantages of implementing multi-party matching trades using smart contracts.

Understanding Reentrancy Attacks in Smart Contracts

Let’s understanding reentrancy attacks in smart contracts, and how to prevent them.