Smart Contract Examples

This section provides practical examples of smart contracts on RibbleChain, leveraging EVM++ parallel execution and account abstraction. These examples demonstrate common use cases like DeFi, GameFi, and tokenization.

Example 1: Decentralized Exchange (DEX)

A simple DEX contract for swapping tokens, optimized for EVM++:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract SimpleDEX {
    mapping(address => uint256) public balances;
    uint256 public totalLiquidity;

    // Deposit tokens
    function deposit() external payable {
        balances[msg.sender] += msg.value;
        totalLiquidity += msg.value;
    }

    // Swap tokens
    function swap(address to, uint256 amount) external {
        require(balances[msg.sender] >= amount, "Insufficient balance");
        balances[msg.sender] -= amount;
        balances[to] += amount;
    }

    // Batch swap for multiple users (EVM++ optimization)
    function batchSwap(address[] calldata users, uint256[] calldata amounts) external {
        require(users.length == amounts.length, "Invalid input");
        for (uint256 i = 0; i < users.length; i++) {
            require(balances[users[i]] >= amounts[i], "Insufficient balance");
            balances[users[i]] -= amounts[i];
            balances[users[i]] += amounts[i];
        }
    }
}