5_deploy_smart_contracts.py

import json
from web3 import Web3

# Set up web3 connection with Ganache
ganache_url = "http://127.0.0.1:7545"
web3 = Web3(Web3.HTTPProvider(ganache_url))

abi = json.loads('[{"constant":false,"inputs":[{"name":"_greeting","type":"string"}],"name":"setGreeting","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"greet","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"greeting","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"}]')
bytecode = "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"

# # set pre-funded account as sender
web3.eth.defaultAccount = web3.eth.accounts[0]

# # Instantiate and deploy contract
Greeter = web3.eth.contract(abi=abi, bytecode=bytecode)

# # Submit the transaction that deploys the contract
tx_hash = Greeter.constructor().transact()

# # Wait for the transaction to be mined, and get the transaction receipt
tx_receipt = web3.eth.waitForTransactionReceipt(tx_hash)

# # Create the contract instance with the newly-deployed address
contract = web3.eth.contract(
    address=tx_receipt.contractAddress,
    abi=abi,
)

print(tx_receipt.contractAddress)

# # # Display the default greeting from the contract
print('Default contract greeting: {}'.format(
    contract.functions.greet().call()
))

# # update the greeting
tx_hash = contract.functions.setGreeting('HELLOOOO!!!!').transact()

# # Wait for transaction to be mined...
web3.eth.waitForTransactionReceipt(tx_hash)

# # Display the new greeting value
print('Updated contract greeting: {}'.format(
    contract.functions.greet().call()
))