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Web3MintContractPython

Example of how to mint an Ethereum based token from a given Smart Contract using Web3 in Python

  1. Create Python virtual environment (optional)
    python -m venv venv
    source venv/bin/activate

  2. Install web3.py
    pip install web3

  3. Enter your Ethereum endpoint URL using Infura or equivalent
    This is required to query the Ethereum blockchain
    infura_url = "https://rinkeby.infura.io/v3/00000000000000000000000"

  4. Enter the address and ABI of the Smart Contract (From)
    You can get this from etherscan.io
    contract_address = web3.toChecksumAddress("0x00000000000000000000000")
    abi = '[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"} ... ]'

  5. Enter the Smart Contract owner's wallet address and private key
    WARNING: the Private Key is SENSITIVE and should NOT be stored here in production!! This is stored here in this example to keep things simple
    contractowner_address = "0x00000000000000000000000"
    contactowner_private_key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxx"

  6. Enter the the purchaser's (To) wallet address
    towallet_address = "0x00000000000000000000000"

  7. In build the transaction (tx), specify the gas and amount to be paid
    'gas' is the gas fee you pay in Wei (in the example below, 1,000,000 Wei = 0.000000000001 ETH)
    'value' is the amount you pay to mint the token (in the example below, 10 Finney = 0.01 ETH)

tx = contract.functions.safeMint(
    towallet_address).buildTransaction({
    'gas': 1000000,
    'gasPrice': web3.toWei('1', 'gwei'),
    'from': contractowner_address,
    'nonce': nonce,
    'value': web3.toWei('10', 'finney'),
    })
  1. run web3MintContract.py
    python3 web3MintContract.py

Output should be similar to this:

Minting from contract: 0x00000000000000000000000
Minting to wallet address: 0x00000000000000000000000
Nonce: 69
Signing transaction
Sending transaction
Transaction Successful!
Transaction Hash:
0x000000000000000000000000000000000000000

Questions?
benwhut@gmail.com