PromptHash

AI Prompt Marketplace

Overview

PromptHash is a dynamic, AI-powered marketplace connecting prompt creators with users seeking inspiration, productivity, and cutting-edge solutions. Our platform enables users to explore, create, buy, and sell high-quality AI prompts across various categories.

Vision

To become the go-to resource where creators and users converge — leveraging advanced AI models, privacy-focused blockchain infrastructure, and intuitive design — to spark transformative ideas across industries.

Key Features

🔍 Browse & Discover – Explore curated collections of AI prompts from top creators
💰 Buy & Sell Prompts – Monetize your expertise or find the perfect prompt
🔒 Blockchain Security – Built on Avalanche Blockchain
💬 Conversational AI – Maintain chat sessions with context awareness
🏛️ Governance – Community-driven platform development
✨ Prompt Engineering – Tools to improve and optimize AI prompts
👨‍💻 Creator Profiles – Dedicated space for top prompt creators
🖼️ Multi-Format Support – Generate images, text, and code with ease

🚀 How We Use Avalanche Blockchain

For Non-Technical Users

Avalanche is our digital ledger and payment system — a secure, decentralized database recording all prompt transactions and automating payments.

It ensures:

Secure Ownership – Every prompt becomes a unique NFT on Avalanche
Automatic Payments – Instant, secure transfers via smart contracts
Transparent History – All transactions are public and immutable
No Middlemen – Peer-to-peer transactions without bank fees
Global Access – Anyone with internet can participate

For Technical Users

Avalanche serves as our decentralized database and payment infrastructure through the following implementation:

🧠 Smart Contract Architecture

ERC-721 NFT Contract: PromptHash.sol deployed at 0x76744225486abccBFAEb0b597bDD676A2e6B90B0
Upgradeable Contract: Uses OpenZeppelin’s UUPS pattern
Gas Optimization: Built on Avalanche C-Chain

⚙️ Core Functions

// Create new prompts as NFTs
function createPrompt(string memory _imageUrl, string memory _description) external returns (uint256)

// List prompts for sale
function listPromptForSale(uint256 _tokenId, uint256 _price) external

// Purchase prompts with automatic fee distribution
function buyPrompt(uint256 _tokenId) external payable nonReentrant

// Retrieve all prompts
function getAllPrompts() external view returns (uint256[] memory, Prompt[] memory)

🌐 Network Configuration

Primary Network: Avalanche C-Chain (Mainnet)
Test Network: Avalanche Fuji Testnet
RPC Endpoint: https://api.avax.network/ext/bc/C/rpc
Block Explorer: snowtrace.io

🧩 Technical Stack Integration

Frontend: Wagmi + RainbowKit
Smart Contract Interaction: Ethers.js
Transaction Management: Auto gas estimation & confirmation
Fee Structure: 1% platform fee (configurable wallet)

🗃️ Data Storage Pattern

On-Chain: Metadata, ownership, transaction history
Off-Chain: Image URLs & descriptions (IPFS-ready)
Hybrid Approach: Blockchain security + scalable storage

🧭 Features & Overview

Discover & Explore: Browse curated AI prompts across categories
Sell & Share: Monetize your best prompts
Interactive Chat: AI-driven recommendations & insights
Responsive UI: Next.js + Tailwind CSS
API Integration: RESTful API endpoints

🛠️ Categories

Category	Description
📸 Image Prompts	For visual content generation
📝 Text & Writing	Creative writing, copywriting
📊 Marketing Copy	Advertising, email, and conversion content
💡 Creative Ideas	Brainstorming and ideation
🚀 Productivity	Workflow optimization
💻 Code Generation	Programming and development assistance

🧰 Tech Stack

Layer	Tools
Frontend	Next.js, React, Tailwind CSS
Backend	FastAPI
AI Integration	Google Gemini AI API
Authentication	Wallet Connect
Server	Uvicorn
Blockchain	Avalanche
Smart Contracts	Solidity + OpenZeppelin
Web3 Integration	Ethers.js, Wagmi, RainbowKit

⚙️ Prerequisites

Python 3.12.0
Secret AI API Key
Node.js 18+
Web browser with wallet extension
MetaMask or any EVM-compatible wallet

🔗 API Endpoints

Models

GET /api/models – Retrieve available AI models

Chat

GET /api/chat – Chat with an AI model Parameters:

prompt – User’s input
model (optional) – AI model name

Prompt Improvement

POST /api/improve-prompt – Enhance a prompt Body:

{
  "prompt": "Create an image of a futuristic city"
}

Health Check

GET /api/health – Check API status

💡 Usage Examples

Chat with AI Model

import requests

API_KEY = "your_api_key_here"
BASE_URL = "http://localhost:8000"
headers = {"X-API-Key": API_KEY}

response = requests.get(
    f"{BASE_URL}/api/chat",
    params={"prompt": "Explain the benefits of Secret Network for AI applications", "model": "deepseek-r1:70b"},
    headers=headers
)

print(response.json())

Improve a Prompt

import requests

API_KEY = "your_api_key_here"
BASE_URL = "http://localhost:8000"
headers = {"X-API-Key": API_KEY, "Content-Type": "application/json"}

data = {"prompt": "Create an image of a futuristic city"}

response = requests.post(f"{BASE_URL}/api/improve-prompt", json=data, headers=headers)

print(response.json())

📁 Project Structure

PromptHash/
├── src/
│   ├── web3/
│   │   ├── PromptHash.sol
│   │   ├── PromptHash.js
│   │   └── metadata.json
│   ├── components/
│   ├── hooks/
│   ├── lib/
│   └── app/
├── app/
│   ├── __init__.py
│   ├── config.py
│   ├── main.py
│   ├── models.py
│   ├── security.py
│   └── routers/
├── requirements.txt
├── package.json
└── README.md

📦 Dependencies

FastAPI – API framework
Uvicorn – ASGI server
React / Next.js / Tailwind – Frontend stack
Lucide – UI icons
Ethers.js – Smart contract interaction
Wagmi + RainbowKit – Wallet integration
OpenZeppelin – Secure Solidity libraries

For the complete list, refer to requirements.txt and package.json.

🧊 Why Avalanche?

⚡ Speed – Sub-second transaction finality
💸 Cost – Transactions under $1
🌍 Scalability – High throughput
🔧 EVM Compatibility – Ethereum-ready
🌱 Eco-Friendly – Energy-efficient PoS
🧑‍💻 Developer Friendly – Excellent docs & tooling

🌐 Getting Started with Avalanche

Install MetaMask or another EVM wallet
Add the Avalanche Network:

   Network Name: Avalanche C-Chain
   RPC URL: https://api.avax.network/ext/bc/C/rpc
   Chain ID: 43114
   Symbol: AVAX
   Explorer: https://snowtrace.io/