app.py

import gradio as gr
import openai
from llama_index import GPTListIndex, Document

# OpenAI API Key (Replace with env variable in production)
OPENAI_API_KEY = "your_openai_api_key_here"
openai.api_key = OPENAI_API_KEY

def analyze_smart_contract(code_snippet):
    """Analyzes the smart contract code for vulnerabilities using OpenAI."""
    prompt = f"""
    You are a smart contract security auditor. Analyze the following Solidity code and identify potential vulnerabilities. Suggest fixes where necessary.
    
    Code:
    {code_snippet}
    """
    
    response = openai.ChatCompletion.create(
        model="gpt-4o-mini",
        messages=[{"role": "system", "content": "You are a Solidity security expert."},
                  {"role": "user", "content": prompt}]
    )
    return response["choices"][0]["message"]["content"]

def human_review(contract_code, ai_analysis):
    """Integrates human-in-the-loop via LlamaIndex."""
    document = Document(text=f"Smart Contract Code:\n{contract_code}\n\nAI Analysis:\n{ai_analysis}")
    index = GPTListIndex.from_documents([document])
    return index.query("Is the AI analysis correct? Provide feedback if needed.")

# Gradio UI
with gr.Blocks() as demo:
    gr.Markdown("## 🔍 Smart Contract Auditor Assistant")
    code_input = gr.Textbox(label="Paste your Solidity smart contract code", lines=10)
    analyze_btn = gr.Button("Analyze Code")
    ai_output = gr.Textbox(label="AI Analysis & Fixes")
    human_review_btn = gr.Button("Request Human Review")
    human_feedback = gr.Textbox(label="Human Expert Feedback")
    
    analyze_btn.click(analyze_smart_contract, inputs=code_input, outputs=ai_output)
    human_review_btn.click(human_review, inputs=[code_input, ai_output], outputs=human_feedback)

demo.launch()