chainlist VS hardhat

Visit chainlist.org

Before testing, you need to adjust the variables NETWORK_ID and MY_CONTRACT_ADDRESS in js/blockchain_stuff.js. NETWORK_ID is the unique identifier of the chain you are using. In this example, I'm using 534351, which represents the Scroll Sepolia Testnet. If you wish to use another chain, I recommend finding the identifier on chainlist. Also, place the address of the CircomCustomLogic contract you just deployed into the MY_CONTRACT_ADDRESS variable.

Head to coinmarketcap Search for donut You'll see contract, copy the one from gnosis network Head to your metamask and add gnosis network using this Switch to gnosis after adding it to your metamask Click on add token and paste the donut contract then add it

You can check out a list of EVM chains here: https://chainlist.org/

I don't care if my transaction is leaked as long as my secret phrases are safe. Is it possible to leak your SP through a RPC? For example, there are many RPCs on https://chainlist.org/ And they have a security score for each one. Should I be worried about a low score?

# Helper function that checks a single node def get_last_block_once(rpc): try: w3 = Web3(Web3.HTTPProvider(rpc)) block_number = w3.eth.block_number if isinstance(block_number, int): return block_number else: return None except Exception as e: print(f'{rpc} - {repr(e)}') return None # Main function to check the status of the service that will be called def check_service(): # pre-prepared list of reference nodes # for any network, it can be found on the website https://chainlist.org/ list_of_public_nodes = [ 'https://polygon.llamarpc.com', 'https://polygon.rpc.blxrbdn.com', 'https://polygon.blockpi.network/v1/rpc/public', 'https://polygon-mainnet.public.blastapi.io', 'https://rpc-mainnet.matic.quiknode.pro', 'https://polygon-bor.publicnode.com', 'https://poly-rpc.gateway.pokt.network', 'https://rpc.ankr.com/polygon', 'https://polygon-rpc.com' ] # parallel processing of requests to all nodes with multiprocessing.Pool(processes=len(list_of_public_nodes)) as pool: results = pool.map(get_last_block_once, list_of_public_nodes) last_blocks = [b for b in results if b is not None and isinstance(b, int)] # define the maximum and median value of the current block med_val = int(np.median(last_blocks)) max_val = int(np.max(last_blocks)) # determine the number of nodes with the maximum and median value med_support = np.sum([1 for x in last_blocks if x == med_val]) max_support = np.sum([1 for x in last_blocks if x == max_val]) return max_val, max_support, med_val, med_support

With this said, chainlist.org is a commonly referenced site too. Just sharing what is in the documentation for MM :) .

3: You now need to add the Optimism network into Metamask. Go to chainlist.org, "connect wallet" (connect with Metamask), search for Optimism, click add to Metamask, approve, switch network. You'll now be on optimism.

Hardhat or Truffle development environment

Hardhat

4. Hardhat and Truffle

Let's build a web frontend to a smart contract! This is a followup to my previous post about creating a simple smart contract with Solidity and Hardhat. The instructions here assume you are picking up up with the same contract that we just deployed to our Hardhat environment.

Welcome to my post about Smart Contract development! This post is mostly just my notes on how to get a super simple smart contract (self executing program on a blockchain) written, deployed and called. For me it is easier to learn something new by doing. When dealing with blockchains and smart contracts however, that "doing" becomes expensive when you are trying to do something many times for educational purposes. Since every write to a blockchain costs something (on Ethereum Virtual Machine, or EVM, based networks, this cost is referred to as a Gas Fee). To avoid the cost of writing to a real blockchain, we'll use a tool called Hardhat. Hardhat will simulate an EVM network/blockchain for us to play with. When you are ready to actually publish your Smart Contract to a real blockchain, you'll need to either run a node yourself or use a Node Provider like Alchemy.

Contracts: This directory contains all of the code for developing smart contracts using either the Foundry or Hardhat frameworks. Both frameworks have been structured to allow for rapid and easy DApp development. For this tutorial, we will focus on the Foundry framework.

Install Hardhat, OpenZeppelin, hardhat toolbox, and the axelar-gmp-sdk-solidity with the following commands:

Hardhat : Site officiel

Truffle and Hardhat both are quiet and commonly used packages