app.py

import gradio as gr
import urllib.request, json

GATEWAY_URL = 'http://34.41.139.70'

def check_health():
    try:
        r = urllib.request.urlopen(f'{GATEWAY_URL}/health', timeout=5)
        return json.loads(r.read())
    except Exception as e:
        return {'error': str(e)}

def settle_payment(amount):
    payload = json.dumps({'hash':'demo123','asset':'USDC','network':'Solana','amount':float(amount)}).encode()
    try:
        r = urllib.request.urlopen(f'{GATEWAY_URL}/api/settlement/verify', data=payload, headers={'Content-Type':'application/json'}, timeout=5)
        return json.loads(r.read())
    except Exception as e:
        return {'error': str(e)}

with gr.Blocks(title='NullState Gateway Demo') as demo:
    gr.Markdown('# NullState Gateway\nOpen-source x402 settlement layer for AI agents')
    gr.Markdown(f'Active Gateway: {GATEWAY_URL}')
    with gr.Tab('Health'):
        btn = gr.Button('Check Gateway Health')
        out = gr.JSON(label='Status')
        btn.click(fn=check_health, outputs=out)
    with gr.Tab('Settlement'):
        amt = gr.Number(label='Amount (USDC)', value=1.0)
        btn2 = gr.Button('Test Settlement')
        out2 = gr.JSON(label='Result')
        btn2.click(fn=settle_payment, inputs=amt, outputs=out2)
    gr.Markdown('---\n[NullState GitHub](https://github.com/NullStateGGH/nullstate) | [Gateway](http://34.41.139.70)')
demo.launch()