Among my readers, there is a young man named Xiao Chen. He is a newcomer in the workplace and has just started to get in touch with blockchain technology. Xiao Chen accidentally discovered an open course website of MIT - MIT OpenCourseWare, and found a course on cryptocurrency engineering and design (MAS.S62 Cryptocurrency Engineering and Design, Spring 2018). He was deeply attracted by the course content and decided to study this course systematically.

The course covers the basics of cryptocurrency, blockchain technology, smart contract design, and blockchain security. Chen invested a lot of time and energy, and through video lectures, reading materials, and completing after-class exercises, he gained a deeper understanding of blockchain technology.

When he learned how to design and write smart contracts, he came up with a bold idea: why not create his own ERC20 token in Python and launch a small-scale airdrop campaign? #contentmining

So, he started his programming journey. First, he wrote a simplified ERC20 smart contract, including the name of the token, the total supply, and the transfer function. Then, he used Python and Web3.py to compile and deploy this smart contract. This is the main part of his Python script:

from web3 import Web3, HTTPProvider from solcx import compile_source # Connect to Ethereum node web3 = Web3(HTTPProvider('https://mainnet.infura.io/v3/YOUR_INFURA_PROJECT_ID')) # Read smart contract source code with open('Token.sol', 'r') as file: source_code = file.read() # Compile smart contract compiled_code = compile_source(source_code) bytecode = compiled_code[':Token']['bin'] abi = compiled_code[':Token']['abi'] # Set default account for deploying contract web3.eth.defaultAccount = web3.eth.accounts[0] # Deploy smart contract Token = web3.eth.contract(abi=abi, bytecode=bytecode) tx_hash = Token.constructor().transact() # Wait for transaction to be mined tx_receipt = web3.eth.waitForTransactionReceipt(tx_hash) # Get the deployed contract address contract_address = tx_receipt['contractAddress']

After successfully deploying the smart contract, Xiao Chen was extremely excited. He decided to share the contract address with his friends and readers, inviting them to participate in his airdrop event.

The airdrop was a huge success, attracting a large number of people to participate and creating a certain amount of attention for his tokens. Even some exchanges began to pay attention to and listed his tokens.

In this process, Xiao Chen experienced the charm of blockchain technology and saw that his hard work and learning results were actually rewarded. This is his #glorymoment.