Interacting with smart contracts

You can only interact with a smart contract if it has public or external functions. The smart contract you’ve deployed has three external functions: store, retrieve, and donate.

From the end user’s perspective, the function can be divided into reading functions and altering-state or writing functions. The smart contract has one reading function, retrieve.

Let’s execute the retrieve method. Create a file named execute_retrieve.py and add the following code to it:

from web3 import Web3
with open("abi.json") as f:
    abi = f.read().strip()
w3 = Web3(Web3.IPCProvider('/tmp/geth.ipc'))
address = "0x8bb44f25E5b25ac14c8A9f5BFAcdFd1a700bA18B"
contract = w3.eth.contract(address=address, abi=abi)
number = contract.functions.retrieve().call()
print(number)

Make sure you change the address of the smart contract in the script to your smart contract’s address. Also, change the...