A complete guide to interacting with the Monad Testnet using Web3.py. Learn to wrap tokens, deploy contracts, and find the fastest RPCs automatically.
Why Monad? 💜
If you’re reading this, you know Monad is the hottest Layer 1 right now. It promises 10,000 TPS and full EVM compatibility. But as a developer (or airdrop farmer 🚜), manually clicking “Swap” every day to keep your wallet active on the Testnet is… painful.
RPCs go down. Transactions fail. It’s a grind.
So I decided to automate it.
In this tutorial, I’ll show you how to build a “Monad Swiss Knife” in Python that:
Auto-switches to the fastest RPC (no more timeouts).
Wraps/Unwraps MON (DeFi activity).
Deploys Contracts and Mints NFTs.
🛑 Too lazy to code?
You can just download the finished tool here: https://github.com/CryZenXs/Monad-Swiss-Knife
It’s open source and free.
Prerequisites 🛠️
You’ll need Python installed and a few libraries:
bash:
pip install web3 rich python-dotenv requests
Step 1: Finding a Fast RPC 🚀
Monad Testnet is busy. Public RPCs get congested. We need a function that tests multiple endpoints and picks the winner.
python
import time
import requests
# Valid Monad Testnet RPCs
RPCS = [
"https://testnet-rpc.monad.xyz/",
"https://rpc-testnet.monadinfra.com",
"https://rpc.ankr.com/monad_testnet"
]
def get_fastest_rpc():
best_rpc = None
min_latency = float('inf')
for rpc in RPCS:
try:
start = time.time()
requests.post(rpc, json={"jsonrpc":"2.0","method":"eth_blockNumber","id":1}, timeout=2)
latency = (time.time() - start) * 1000
print(f"{rpc}: {latency:.2f}ms")
if latency < min_latency:
min_latency = latency
best_rpc = rpc
except:
continue
return best_rpc
Step 2: The Automator Class 🤖
Now, let’s build the core logic to interact with the blockchain using web3.py.
python
from web3 import Web3
import os
class MonadBot:
def __init__(self, rpc_url, private_key):
self.w3 = Web3(Web3.HTTPProvider(rpc_url))
self.account = self.w3.eth.account.from_key(private_key)
def wrap_mon(self, amount_eth=0.01):
# Canonical WMON Contract on Monad Testnet
wmon_address = "0xFb8bf4c1CC7a94c73D209a149eA2AbEa852BC541"
tx = {
'to': wmon_address,
'value': self.w3.to_wei(amount_eth, 'ether'),
'gas': 50000,
'nonce': self.w3.eth.get_transaction_count(self.account.address),
'chainId': 10143, # Monad Testnet ID
'data': '0xd0e30db0' # Deposit() selector
}
# Sign and Send
signed_tx = self.w3.eth.account.sign_transaction(tx, self.account.privateKey)
tx_hash = self.w3.eth.send_raw_transaction(signed_tx.rawTransaction)
return self.w3.to_hex(tx_hash)
Step 3: Putting it Together (The CLI) 🖥️
I used the rich library to make a beautiful terminal interface.
The full code handles errors, retries, and even has an NFT minter.
Conclusion & Download 🎁
Building your own tools is the best way to learn Web3. But if you just want the results, grab the full code from my repo.
Features in the full version:
✅ Multi-RPC Support
✅ NFT Minting Logic
✅ Beautiful CLI Menu
✅ Gas Optimization
👉 https://github.com/CryZenXs/Monad-Swiss-Knife
If this helped you, drop a star on the repo! Happy farming! 🟣