app.py

import gradio as gr
from ocean_lib.config import Config
from ocean_lib.models.btoken import BToken #BToken is ERC20
from ocean_lib.ocean.ocean import Ocean
from ocean_lib.web3_internal.wallet import Wallet
from ocean_lib.web3_internal.currency import from_wei # wei is the smallest denomination of ether e.g. like cents
from ocean_lib.web3_internal.currency import pretty_ether_and_wei

config = Config('config.ini')
ocean = Ocean(config)

def wallet(private_key, did):
    wallet = Wallet(ocean.web3, private_key, transaction_timeout=20, block_confirmations=config.block_confirmations)
    address = wallet.address
    OCEAN_token = BToken(ocean.web3, ocean.OCEAN_address)

    eth_balance = from_wei(ocean.web3.eth.get_balance(wallet.address))
    ocean_balance = from_wei(OCEAN_token.balanceOf(wallet.address))

    asset = ocean.assets.resolve(did)

    ALG_ddo = ocean.assets.resolve(did)
    alg_token = ocean.get_data_token(ALG_ddo.data_token_address)

    alg_token_balance = pretty_ether_and_wei(alg_token.balanceOf(wallet.address))

    return address, eth_balance, ocean_balance, alg_token_balance

description = (
    "This demo shows the balance of algorithm tokens, as well as ETH and OCEAN, in your Web3 wallet (for a given private key). The algorithm tokens will be used to run Algovera apps on HF spaces in future. " 
    "Currently, you need to export your private key from a MetaMask wallet (we plan to randomly generate a private key in the app and bypass MetaMask in future). "
    "For a guide on how to install MetaMask (an extension in your browser), check the link at the bottom of the page. "
    "We highly recommend doing this with a wallet that has no real tokens in it. We use a test network (Rinkeby) where the tokens have no real value. "
    "After an initial setup, your wallet should have no tokens. You can request ETH and OCEAN test tokens from faucets at the links at the bottom of the page. "
    "To buy an algorithm token (using the OCEAN and ETH), you can search for algorithms on the Ocean marketplace (see link at bottom). Make sure to use algorithms that are on the Rinkeby test network (you need to select Rinkeby from the dropdown menu). "
    "We have provided a link to our DCGAN model on the test network at the bottom. If you can't see it you are not on the test network. "
    "After you buy an algorithm token, you need to locate the DID in the metadata on the marketplace. Then enter it into the input textbox. "
    "Later we will add HF Spaces apps to search algorithms and buy algorithm tokens, which you can use to run demos of the algorithms. "
    "This demo uses the Ocean Python library in the backend (see link below)."
)

article = (
    "<p style='text-align: center'>"
    "<a href='https://docs.oceanprotocol.com/tutorials/metamask-setup/' target='_blank'>1. Guide for installing MetaMask</a> | "
    "<a href='https://faucet.rinkeby.io/' target='_blank'>2. ETH faucet</a> | "
    "<a href='https://faucet.rinkeby.oceanprotocol.com/' target='_blank'>3. OCEAN faucet | </a>"
    "<a href='https://market.oceanprotocol.com/' target='_blank'>4. Ocean marketplace</a> | "
    "<a href='https://market.oceanprotocol.com/asset/did:op:E2e123115d5758Dd4C6F434E1c142e72ed8B2820' target='_blank'>5. DCGAN algorithm</a> | "
    "<a href='https://github.com/oceanprotocol/ocean.py' target='_blank'>6. Ocean Python Library</a>"
    "</p>"
)


interface = gr.Interface(
    wallet,
    [
        gr.inputs.Textbox(label="Private Key"),
        gr.inputs.Textbox(placeholder="did:op:E2e123115d5758Dd4C6F434E1c142e72ed8B2820", label="Algorithm DID"),
    ],
    [
        gr.outputs.Textbox(label="Public Key"),
        gr.outputs.Textbox(label="ETH balance"),
        gr.outputs.Textbox(label="OCEAN balance"),
        gr.outputs.Textbox(label="Algorithm token balance"),
    ],
    title="Algorithm Web3 Wallet",
    description=description,
    article=article,
    theme="huggingface",
)

interface.launch()