Remote Setup

Remote setup for running & testing ocean.py

This setup does not use barge and uses a remote chain to do the transactions. When the network URL is specified & configured, ocean.py will use components (such as Provider, Aquarius, C2D) according to the expected blockchain.

Here, we do setup for Mumbai, the testnet for Polygon. It's similar for other remote chains.

Here, we will:

1. Configure Networks

2. Create two accounts - REMOTE_TEST_PRIVATE_KEY1 and 2

3. Get test MATIC on Mumbai

4. Get test OCEAN on Mumbai

5. Set envvars

6. Set up Alice and Bob wallets in Python

Let's go!

1. Configure Networks

1.1 Supported networks

All Ocean chain deployments (Eth mainnet, Polygon, etc) are supported. For any supported network, use the RPC URL of your choice when passing it to the ocean config object.

1.2 RPCs and Infura

In order to obtain API keys for blockchain access, follow up this document for tips & tricks.

If you do have an Infura account

Use the full RPC URL including the base and API key, e.g. for mumbai: https://polygon-mumbai.infura.io/v3/<API-KEY>

2. Create EVM Accounts (One-Time)

An EVM account is singularly defined by its private key. Its address is a function of that key. Let's generate two accounts!

In a new or existing console, run Python.

python

In the Python console:

from eth_account.account import Account
account1 = Account.create()
account2 = Account.create()

print(f"""
REMOTE_TEST_PRIVATE_KEY1={account1.key.hex()}, ADDRESS1={account1.address}
REMOTE_TEST_PRIVATE_KEY2={account2.key.hex()}, ADDRESS2={account2.address}
""")

Then, hit Ctrl-C to exit the Python console.

Now, you have two EVM accounts (address & private key). Save them somewhere safe, like a local file or a password manager.

These accounts will work on any EVM-based chain: production chains like Eth mainnet and Polygon, and testnets like Goerli and Mumbai. Here, we'll use them for Mumbai.

3. Get (test) MATIC on Mumbai

We need the a network's native token to pay for transactions on the network. ETH is the native token for Ethereum mainnet; MATIC is the native token for Polygon, and (test) MATIC is the native token for Mumbai.

To get free (test) MATIC on Mumbai:

1. Go to the faucet https://faucet.polygon.technology/. Ensure you've selected "Mumbai" network and "MATIC" token.

2. Request funds for ADDRESS1

3. Request funds for ADDRESS2

You can confirm receiving funds by going to the following url, and seeing your reported MATIC balance: https://mumbai.polygonscan.com/address/<ADDRESS1 or ADDRESS2>

4. Get (test) OCEAN on Mumbai

OCEAN can be used as a data payment token, and locked into veOCEAN for Data Farming / curation. The READMEs show how to use OCEAN in both cases.

• OCEAN is an ERC20 token with a finite supply, rooted in Ethereum mainnet at address 0x967da4048cD07aB37855c090aAF366e4ce1b9F48.

• OCEAN on other production chains derives from the Ethereum mainnet OCEAN. OCEAN on Polygon (mOCEAN) is at 0x282d8efce846a88b159800bd4130ad77443fa1a1.

• (Test) OCEAN is on each testnet. Test OCEAN on Mumbai is at 0xd8992Ed72C445c35Cb4A2be468568Ed1079357c8.

To get free (test) OCEAN on Mumbai:

1. Go to the faucet https://faucet.mumbai.oceanprotocol.com/

2. Request funds for ADDRESS1

3. Request funds for ADDRESS2

You can confirm receiving funds by going to the following url, and seeing your reported OCEAN balance: https://mumbai.polygonscan.com/token/0xd8992Ed72C445c35Cb4A2be468568Ed1079357c8?a=<ADDRESS1 or ADDRESS2>

5. Set envvars

As usual, Linux/MacOS needs "export" and Windows needs "set". In the console:

Linux & MacOS users:

# For accounts: set private keys
export REMOTE_TEST_PRIVATE_KEY1=<your REMOTE_TEST_PRIVATE_KEY1>
export REMOTE_TEST_PRIVATE_KEY2=<your REMOTE_TEST_PRIVATE_KEY2>

Windows users:

# For accounts: set private keys
set REMOTE_TEST_PRIVATE_KEY1=<your REMOTE_TEST_PRIVATE_KEY1>
set REMOTE_TEST_PRIVATE_KEY2=<your REMOTE_TEST_PRIVATE_KEY2>

6. Setup in Python

In your working console, run Python:

python

In the Python console:

# Create Ocean instance
import os
from ocean_lib.example_config import get_config_dict
from ocean_lib.ocean.ocean import Ocean
config = get_config_dict("https://polygon.llamarpc.com")  # or use another RPC URL, or an Infura one
ocean = Ocean(config)

# Create OCEAN object. ocean_lib knows where OCEAN is on all remote networks
OCEAN = ocean.OCEAN_token

# Create Alice's wallet
from eth_account import Account

alice_private_key = os.getenv('REMOTE_TEST_PRIVATE_KEY1')
alice = Account.from_key(private_key=alice_private_key)
assert alice.balance() > 0, "Alice needs MATIC"
assert OCEAN.balanceOf(alice) > 0, "Alice needs OCEAN"

# Create Bob's wallet. While some flows just use Alice wallet, it's simpler to do all here.
bob_private_key = os.getenv('REMOTE_TEST_PRIVATE_KEY2')
bob = Account.from_key(private_key=bob_private_key)
assert bob.balance() > 0, "Bob needs MATIC"
assert OCEAN.balanceOf(bob) > 0, "Bob needs OCEAN"

# Compact wei <> eth conversion
from ocean_lib.ocean.util import to_wei, from_wei

If you get a gas-related error like transaction underpriced, you'll need to change the maxFeePerGas or maxPriorityFeePerGas.