AchievementNFT

🏅 AchievementNFT — Tradeable Achievement Tokens

Contract Address: 0x79dfb127BdE60E6bDB945bD1eceAEC553b40a99b
Network: (Add your network — e.g. Sepolia / Polygon / BSC Testnet)
Symbol: ACHV
Standard: Minimal ERC-721 (No imports, No constructor)

📖 Overview

AchievementNFT is a minimal, tradeable NFT contract designed to reward user achievements on-chain.
Each NFT represents a specific milestone or recognition and can be freely traded, transferred, or burned.

It uses a simple admin-based minting model — the admin can mint new NFTs to any address.
No libraries, no constructors, and no imports — fully self-contained and lightweight.

⚙️ Contract Features

🚀 Deployment & Initialization

Step 1: Deploy the contract on Remix (no inputs needed).
Step 2: After deployment, call:

initializeAdmin(<your_wallet_address>)

This sets the admin who can mint achievements.

⚠️ initializeAdmin can only be called once.

🧱 Core Functions

1️⃣ mintAchievement(address to, uint256 tokenId, string uri)

Mint a new achievement NFT to a user.
Only the admin can call this function.

Example:

mintAchievement(0x1234..., 1, "ipfs://achievement1-metadata")

2️⃣ batchMintAchievements(address[] tos, uint256[] tokenIds, string[] uris)

Mint multiple achievements at once to different users.

Example:

batchMintAchievements(
  [0x1111..., 0x2222...],
  [1, 2],
  ["ipfs://achv1", "ipfs://achv2"]
)

3️⃣ transferFrom(address from, address to, uint256 tokenId)

Transfer ownership of a token to another user (standard ERC-721).

Example:

transferFrom(0x1111..., 0x2222..., 1)

4️⃣ burn(uint256 tokenId)

Allows the owner or approved address to destroy (burn) an achievement NFT.

5️⃣ changeAdmin(address newAdmin)

Admin-only function to change the admin address.

🧾 Read Functions

📡 Example Interaction Flow

1. Initialize Admin

   initializeAdmin(0xYourAdminAddress)
   

2. Mint New Achievement

   mintAchievement(0xUserAddress, 1, "ipfs://achievement-metadata")
   

3. Transfer Between Users

   transferFrom(0xUserAddress, 0xAnotherUser, 1)
   

4. Burn (Optional)

   burn(1)
   

🔍 Verification Info

🧠 Notes

• Tokens are fully tradeable (not soulbound).

• Each achievement can have a unique metadata URI (IPFS, Arweave, HTTPS).

• Gas usage is optimized for simplicity and transparency.

• No external libraries — works entirely on Solidity core.

🛠 Example Metadata (IPFS JSON)

{
  "name": "Top Performer Badge",
  "description": "Awarded for outstanding performance.",
  "image": "ipfs://QmExampleImage",
  "attributes": [
    { "trait_type": "Level", "value": "Gold" },
    { "trait_type": "Category", "value": "Productivity" }
  ]
}

👨‍💻 Developer

• Project: AchievementNFT

• Maintainer: Admin wallet set via initializeAdmin

• Version: 1.0

• Network Address: 0x79dfb127BdE60E6bDB945bD1eceAEC553b40a99b