Lesson 4 : How make a transaction with ganache

[wilonweb]

Hello,
when i launch my python deploy.py I d'ont get my transaction witch ganache.

I open with read permission Simplestorage.sol
I install solc ( maybe is not the good version ) ?
but i get my compiled_code_json

I get my byte code and my ABI

I use Ganache to generate Account number with his privateKey

I install and import web3 to connect with ganache

I install dotenv to hide my privateKey
I make a .env file with my privateKey ( from Ganache ) I add 0x a the start of string.

But when i launch my code i got that output

Traceback (most recent call last):
  File "D:\Programmations\smartContract\demo\web3_py-simple_storage\deploy.py", line 61, in <module>
    transaction = SimpleStorage.constructor().buildTransaction(
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\eth_utils\decorators.py", line 18, in _wrapper
    return self.method(obj, *args, **kwargs)
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\web3\contract.py", line 684, in buildTransaction
    return fill_transaction_defaults(self.web3, built_transaction)
  File "cytoolz/functoolz.pyx", line 250, in cytoolz.functoolz.curry.__call__
    return self.func(*args, **kwargs)
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\web3\_utils\transactions.py", line 114, in fill_transaction_defaults
    default_val = default_getter(web3, transaction)
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\web3\_utils\transactions.py", line 64, in <lambda>
    web3.eth.max_priority_fee + (2 * web3.eth.get_block('latest')['baseFeePerGas'])
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\web3\eth.py", line 602, in max_priority_fee
    return self._max_priority_fee()
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\web3\module.py", line 57, in caller
    result = w3.manager.request_blocking(method_str,
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\web3\manager.py", line 198, in request_blocking
    return self.formatted_response(response,
  File "C:\Users\wilfr\AppData\Roaming\Python\Python39\site-packages\web3\manager.py", line 171, in formatted_response
    raise ValueError(response["error"])
ValueError: {'message': 'Method eth_maxPriorityFeePerGas not supported.', 'code': -32000, 'data': {'stack': 'Error: Method eth_maxPriorityFeePerGas not supported.\n    at GethApiDouble.handleRequest (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\lib\\subproviders\\geth_api_double.js:70:16)\n    at next (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\index.js:136:18)\n    at GethDefaults.handleRequest (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\lib\\subproviders\\gethdefaults.js:15:12)\n    at next (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\index.js:136:18)\n    at SubscriptionSubprovider.FilterSubprovider.handleRequest (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\subproviders\\filters.js:89:7)\n    at SubscriptionSubprovider.handleRequest (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\subproviders\\subscriptions.js:137:49)\n    at next (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\index.js:136:18)\n    at DelayedBlockFilter.handleRequest (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\lib\\subproviders\\delayedblockfilter.js:31:3)\n    at next (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\index.js:136:18)\n    at RequestFunnel.handleRequest (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\lib\\subproviders\\requestfunnel.js:32:12)\n    at next (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\index.js:136:18)\n    at Web3ProviderEngine._handleAsync (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\index.js:123:3)\n    at Timeout._onTimeout (C:\\Program Files\\WindowsApps\\GanacheUI_2.5.4.0_x64__5dg5pnz03psnj\\app\\resources\\static\\node\\node_modules\\ganache-core\\node_modules\\web3-provider-engine\\index.js:107:12)\n    at listOnTimeout (internal/timers.js:531:17)\n    at processTimers (internal/timers.js:475:7)', 'name': 'Error'}}

and my code

from solcx import (
    compile_standard,
    install_solc,
)  # <- pour compiler le code import the install_solc method
import json
from web3 import Web3
import os
from dotenv import load_dotenv

load_dotenv()

install_solc("0.6.0")  # <- Add this line and run it at least once!

with open(
    "./Simplestorage.sol", "r"
) as file:  # On ouvre le ficheir simpleStorage, en mode read et nous l'apelon file
    simple_storage_file = file.read()  # On créer une variable pour lire le file

    # Compile our solidity
compiled_sol = compile_standard(
    {
        "language": "Solidity",
        "sources": {"SimpleStorage.sol": {"content": simple_storage_file}},
        "settings": {
            "outputSelection": {
                "*": {"*": ["abi", "metadata", "evm.bytecode", "evm.sourceMap"]}
            }
        },
    },
    solc_version="0.6.0",
)
# print(compiled_sol)
with open("compiled_code.json", "w") as file:
    json.dump(
        compiled_sol, file
    )  # Prend le solcX compilé et le garde en json et créer le fichier compiled-code.json

# get ByteCode
bytecode = compiled_sol["contracts"]["SimpleStorage.sol"]["SimpleStorage"]["evm"][
    "bytecode"
]["object"]

# get abi
abi = compiled_sol["contracts"]["SimpleStorage.sol"]["SimpleStorage"]["abi"]

# for connecting to ganache
w3 = Web3(Web3.HTTPProvider("http://127.0.0.1:7545"))
chain_id = 5777
my_adress = "0x254eFA185DF460A57d957855656260b60308D1e7"
private_key = os.getenv("PRIVATE_KEY")
# print(private_key)

# Create the contract in Python
SimpleStorage = w3.eth.contract(abi=abi, bytecode=bytecode)
# Get the latest Transaction
nonce = w3.eth.getTransactionCount(my_adress)
# print(nonce)
# 1 Build le contract
# 2 Sign the transaction
# 3 send the transaction
transaction = SimpleStorage.constructor().buildTransaction(
    {"chainID": chain_id, "from": my_adress, "nonce": nonce}
)

signed_txn = w3.eth.account.sign_transaction(transaction, private_key=private_key)
# Send this sign transaction
tx_hash = w3.eth.send_raw_transaction(signed_txn.rawTransaction)

Do you know why the code doesn't work .... ?

[n4n0b1t3]

Hi, you have the wrong Chain ID, please look at this post here.
#916
You are using the network ID

[wilonweb]

Hi,
So i change my code for connecting to ganache like that.

# for connecting to ganache
w3 = Web3(Web3.HTTPProvider("http://127.0.0.1:7545"))
w3.eth.chain_id
1377
w3.net.version
"5777"
my_adress = "0x254eFA185DF460A57d957855656260b60308D1e7"
private_key = os.getenv("PRIVATE_KEY")

and now i get an error on output ( i tried to add a varible name chain_id = "5777" )

line 65, in <module>    {"chainID": chain_id, "from": my_adress, "nonce": nonce}
NameError: name 'chain_id' is not defined

I'm not comfortable yet with the notion of chain_id
the chain_id is like the id of one block on the blockchain ?
And network id is the id of the blockchain ?
to make a test with ganache where can i find the number if is not under network id ?

transaction = SimpleStorage.constructor().buildTransaction(
    {"chainID": chain_id, "from": my_adress, "nonce": nonce}
)

[n4n0b1t3]

Is this your code?
# for connecting to ganache w3 = Web3(Web3.HTTPProvider("http://127.0.0.1:7545")) w3.eth.chain_id 1377 w3.net.version "5777" my_adress = "0x254eFA185DF460A57d957855656260b60308D1e7" private_key = os.getenv("PRIVATE_KEY")

If so, then you just copied the python ide code directly into your file. That does not work!

What to do:

1. Create a new deploy.py script and copy the source code here: deploy.py from GitHub into the blank file
2. Adapt the necessary parameters like address and priv key etc. In the original script in the lines 54-57. There might be others, read carefully.
3. change the variable chain_id (in the original in line 55) from chain_id = 1337 to chain_id = w3.eth.chain_id,

That should do the trick.

[wilonweb]

Hello
Yes it work with the source code and the trick
I don't remember why we have to change the variable chain_id (in the original in line 55) from chain_id = 1337 to chain_id = w3.eth.chain_id ?
And we can add a ster in the trick
4. change the private key = 0x...... with private_key = os.getenv("PRIVATE_KEY") and add the privateKey number un the .env file