AvaCertify Documentation

Introduction

AvaCertify is a cutting-edge decentralized application (dApp) built on the Avalanche blockchain, designed to revolutionize certificate issuance, verification, and revocation.

Problem Statement

Current Challenges

Time-Consuming Manual Verification
Fraud and Counterfeits
Centralized Vulnerabilities
Limited Global Accessibility

Technical Architecture

Smart Contract Layer

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract AvaCertify is ERC721URIStorage, Ownable {
    uint256 private _tokenIdCounter;
    mapping(uint256 => bool) public revokedCertificates;

    constructor() ERC721("AvaCertify", "AVCRT") {}

    function issueCertificate(address recipient, string memory metadataURI) 
        public onlyOwner {
        uint256 newCertificateId = _tokenIdCounter++;
        _safeMint(recipient, newCertificateId);
        _setTokenURI(newCertificateId, metadataURI);
    }

    function verifyCertificate(uint256 certificateId) 
        public view returns (bool) {
        return !revokedCertificates[certificateId];
    }

    function revokeCertificate(uint256 certificateId) public onlyOwner {
        revokedCertificates[certificateId] = true;
    }
}