The business designs the Web3 smart contract logic based on its business model and needs. The next step for a company to think of is how to deploy this logic in a public blockchain network where people are staying and which they are using. Moreover, a script can smoothly interact with the blockchain network seamlessly no matter it’s for testing purposes or enhancing the user experience.
In this article, I will expand on how to use Infura, Metamask, and Python to make it function in your Web3.0. The piece would share the approach based on the previous Ganache script.
Ingredients to build a Python script to connect the Ethereum blockchain network using Infura, MetaMask
- Python3, Web3, Infura, MetaMask wallet, Ganache Python script.
Table of Content
- MetaMask Address & Private Key
- Type of Blockchain Network ID
- Full Python Script of Ethereum BloackNetwork Connection Using Infura and MetaMask
Different from Web2.0, there is no HTTP URL you can use directly and get you onto a Blockchain network, e.g Ethereum, in Web3.0. To access these networks natively and see the data being passed across them, you would have to install what’s known as a client. You do can develop an endpoint that can connect to Ethereum. Nevertheless, that would be much more complicated and cost you more. Under this context, this is why we recommend Infura.
Infura provides an endpoint directly that your code can point to the Ethereum network so that your Web3.0 smart contract requests to receive or record information can always get to the network. Meanwhile, they return to you the information you’ve requested as well.
As discussed in the previous article, we use the web3 module to connect our local HTTP protocol. So if we like to connect to the real Ethereum network, Infura can provide us with an HTTP protocol with the API key that is used in this Python script.
For example, our live test network is Goerili (You can select Mainnet if it’s not a test). So we select the network in Infura and copy and paste the HTTPS protocol to our script. Here is the code as follows:
# for connecting to Ethereum network
w3 = Web3(Web3.HTTPProvider(
"https://your http address"))
MetaMask ID Address & Private Key
Without a doubt, MetaMask is the most popular wallet currently used in Web3.0. With 21 million+ monthly active users, its user-friendly interface enables the ability to interact with the blockchain while having an account back up with a seed phrase. All in all, if you are developing a DApp, using MetaMask to test is notably the most proper because it ensures MetaMask login and payment can work in your DApp.
Moreover, MetaMask is configurable with Infura. Thus, your Web3 smart contracts built in the DApp can connect with MetaMask through Infura.
For the wallet address, we need to copy the MetaMask account ID (Above the number under the Easy2Digital title) and paste it to
my_address variable in the Python script.
my_address = "your metamask ID address"
private_key = os.getenv("PRIVATE_KEY2")
Type of Blockchain Network ID
Each Blockchain network has a unique ID. For example, our test case uses the Goerili network and the chain ID is 5.
chain_id = 5
We can not only go to chainlist.org to look up your network ID, but also we can run the Python script, and then the response would give you feedback on what the Chain ID should be from the network now you are accessed.
Full Python Script of Ethereum BloackNetwork Connection Using Infura and MetaMask
If you are interested in Web3.0 tutorial 2 – Use Infura and Metamask in Python Scripts to Deploy Web3 Smart Contracts on a Real Ethereum BlockChain Network, please subscribe to our newsletter by adding the message “Web3.0 tutorial 2”. We would send you the script immediately to your mailbox.
I hope you enjoy reading Web3.0 tutorial 2 – Use Infura and Metamask in Python Scripts to Deploy Web3 Smart Contracts on a Real Ethereum BlockChain Network. If you did, please support us by doing one of the things listed below, because it always helps out our channel.
- Support and donate to my channel through PayPal (paypal.me/Easy2digital)
- Subscribe to my channel and turn on the notification bell Easy2Digital Youtube channel.
- Follow and like my page Easy2Digital Facebook page
- Share the article on your social network with the hashtag #easy2digital
- You sign up for our weekly newsletter to receive Easy2Digital latest articles, videos, and discount codes
- Subscribe to our monthly membership through Patreon to enjoy exclusive benefits (www.patreon.com/louisludigital)
Q1: What is an Ethereum smart contract?
A: An Ethereum smart contract is a computer program or a transaction protocol that is stored on the blockchain and runs when predetermined conditions are met.
Q2: What are the benefits of using Ethereum smart contracts?
A: Ethereum smart contracts offer several benefits, including immutability, security, transparency, decentralization, and autonomy.
Q3: What are some real-world use cases for Ethereum smart contracts?
A: Ethereum smart contracts have various real-world applications, such as financial transactions, crowdfunding, voting systems, supply chain management, and decentralized applications (dApps).
Q4: How do I create an Ethereum smart contract?
A: To create an Ethereum smart contract, you can use a programming language like Solidity, write the code, compile it, and deploy it to the blockchain.
Q5: What is the process of deploying an Ethereum smart contract?
A: Deploying an Ethereum smart contract involves compiling the code, generating the bytecode, and sending a transaction to the blockchain network to create a new contract instance.
Q6: What are the different ways to interact with an Ethereum smart contract?
A: You can interact with an Ethereum smart contract by sending transactions, calling its functions, or reading its data through web3.js, web3.py, or other libraries.
Q7: How do I test an Ethereum smart contract?
A: You can test an Ethereum smart contract using various methods, such as unit testing, integration testing, and security audits.
Q8: What are the security considerations when using Ethereum smart contracts?
A: When using Ethereum smart contracts, it’s essential to consider security aspects like code vulnerabilities, gas optimization, and access control mechanisms to prevent exploits.
Q9: What are some popular Ethereum smart contract platforms?
A: Some popular Ethereum smart contract platforms include Remix, Truffle, Hardhat, and OpenZeppelin.
Q10: What is the future of Ethereum smart contracts?
A: Ethereum smart contracts hold significant potential for transforming industries with their ability to automate processes, enhance security, and enable trustless transactions.