evire
  • ⚪EVIRE
  • INTRODUCTION
    • ▪️Key Features and Capabilities
    • ▪️High-Level Architecture
    • ▪️Roadmap
    • ▪️Finances
    • ▪️Licensing
    • ▪️Tokenomics
      • EVIRE ERC20 token
      • Token Vesting
    • ▪️Audit
  • Core Concepts
    • ▪️Blockchain Basics
    • ▪️Ethereum Virtual Machine (EVM)
    • ▪️Smart Contracts and Decentralized Applications
  • TESTNET
    • Adding Evire Testnet to Metamask
    • Using the Evire Faucet
  • FRAMEWORKS AND NATIVE FUNCTIONS
    • ▪️Overview
  • AI Framework
    • ▪️Smart Contract Libraries for AI
      • Example: Data Preprocessing Libraries
      • Example: Model Execution and Management Library
    • ▪️Off-Chain Compute Framework
      • Example: AI-Powered Predictive Analytics dApp
      • Example: Off-Chain Computation Request Handling
    • ▪️Decentralized Storage Integration
      • Example: Data Linking via Smart Contracts
      • Example: On-Demand Data Retrieval Implementation
    • ▪️Oracles for Real-Time Data
      • Example: Real-Time Data Fetching Oracle for Financial Models
    • ▪️Model Training and Deployment Tools
      • Example: AI Model Deployment
    • ▪️AI-Specific Governance Protocols
      • Example: AI Governance Smart Contract for Bias Audit and Consensus Decision
    • ▪️User-Friendly Developer Interfaces
    • ▪️Privacy Tools and Standards
  • Gaming Framework
    • ▪️Specialized Gaming Smart Contract Libraries
      • Example: Secure and Fair Random Number Generation Library
      • Example: Asset Trading Library
      • Example: Game State Management Library
      • Example: Evire Player Stats Library
    • ▪️Scalable and Efficient Consensus Mechanisms
    • ▪️Interoperability Features
    • ▪️Robust Developer Tooling
    • ▪️User-Friendly SDKs and APIs
    • ▪️Regulatory Compliance Tools
    • ▪️Flexible Asset Management
  • RWA Framework
    • ▪️Identity Verification and Management Libraries
      • Example: Identity Verification Library
    • ▪️Oracles and Data Feeds
    • ▪️Asset Tokenization Frameworks
      • Example: Real Estate Tokenization Library
    • ▪️Legal Compliance and Smart Contract Auditing Tools
    • ▪️Interoperability Solutions
    • ▪️Privacy Enhancements
    • ▪️DeFi Integration Tools
    • ▪️User-Friendly Interfaces and SDKs
    • ▪️Governance Frameworks
    • ▪️Customizable Smart Contract Templates
  • DePIN Framework
    • ▪️Smart Contract Libraries
      • Example: Physical Infrastructure Management Library
    • ▪️Oracles Integration
    • ▪️IoT Integration Framework
    • ▪️Interoperability Protocols
    • ▪️Developer Tooling
    • ▪️User Interface Components
    • ▪️Security Auditing Tools
    • ▪️Governance and Compliance Frameworks
      • Example: Governance And Compliance Library
    • ▪️Tokenization Support
    • ▪️Documentation and Community Support
  • EXAMPLES
    • ▪️AI Framework
    • ▪️Gaming Framework
    • ▪️RWA Framework
    • ▪️DePIN Framework
  • Legal
    • ▪️Terms and Conditions of Participation
  • More
    • ▪️Faucet
    • ▪️Partners
    • ▪️Contribute
  • Links
    • ▪️Website
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    • ▪️Medium
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    • ◾DeBank
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On this page
  • 1. Smart Contract for RNG
  • 2. Explanation of the Contract
  • 3. Deployment and Interaction
  • 4. Testing the RNG
  • Benefits of This Implementation
  1. Gaming Framework
  2. Specialized Gaming Smart Contract Libraries

Example: Secure and Fair Random Number Generation Library

1. Smart Contract for RNG

This smart contract will generate random numbers in a secure and transparent manner.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract SecureRNG {
    uint256 private nonce;
    address private owner;
    
    event RandomNumberGenerated(uint256 randomNumber, address indexed requester);

    constructor() {
        owner = msg.sender;
        nonce = 0;
    }

    // Modifier to restrict access to certain functions
    modifier onlyOwner() {
        require(msg.sender == owner, "Not authorized");
        _;
    }

    // Internal function to generate a random number
    function generateRandomNumber() internal returns (uint256) {
        nonce++;
        uint256 randomNumber = uint256(keccak256(abi.encodePacked(block.timestamp, msg.sender, nonce)));
        return randomNumber;
    }
    
    // Public function to request a random number
    function requestRandomNumber() public returns (uint256) {
        uint256 randomNumber = generateRandomNumber();
        emit RandomNumberGenerated(randomNumber, msg.sender);
        return randomNumber;
    }
    // Function to reset the nonce for added security
    function resetNonce() public onlyOwner {
        nonce = 0;
    }
}

2. Explanation of the Contract

  • A counter that changes with each request to ensure unpredictability.

  • Uses keccak256 to hash the combination of the current block timestamp, the requester's address, and the nonce. This ensures the randomness and security of the generated number.

  • Emits an event every time a random number is generated, providing transparency and allowing for tracking of requests.

3. Deployment and Interaction

Deploying the contract and interacting with it can be done using a blockchain development environment like Truffle or Hardhat.

const SecureRNG = artifacts.require("SecureRNG");

module.exports = function (deployer) {
  deployer.deploy(SecureRNG);
};

4. Testing the RNG

Create a test script to ensure the RNG works as expected.

const SecureRNG = artifacts.require("SecureRNG");

contract("SecureRNG", accounts => {
    it("should generate a random number", async () => {
        const rngInstance = await SecureRNG.deployed();
        const randomNumber = await rngInstance.requestRandomNumber.call();
        console.log("Generated Random Number: ", randomNumber.toString());
        assert(randomNumber, "Random number should be generated");
    });
});

Benefits of This Implementation

  1. The use of keccak256 ensures the randomness is cryptographically secure.

  2. Emitting events for each random number generation allows for public tracking.

  3. Since the number generation is tied to block data and user-specific inputs, it is resistant to manipulation by either players or developers.

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Last updated 11 months ago

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