Lesson 6 : ConnectionError

[wilonweb]

Hello
I launch the command brownie run scripts/deploy.py --network ganache-local
And i get that error
ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=7545): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x0000021B41627DF0>: Failed to establish a new connection: [WinError 10061] Aucune connexion n’a pu être établie car l’ordinateur cible l’a expressément refusée'))

I installed MySQL yesterday. The problem can from my previous SQL installation ?
Or it is because i already deploy the contract ?

[wilonweb]

Update :
I tried to delete and re-add ganache-local network with
brownie networks delete ganache-local and brownie networks add Ethereum ganache-local host=http://127.0.0.1:7545 chainid=5777
And now when i launch
brownie run scripts/deploy.py --network ganache-local
I get

raise ContractNotFound(f"No contract deployed at {address}") ContractNotFound: No contract deployed at 0x955052702Ce443af7EA19488C852D84eBcf0Ae41 PS D:\Programmations\smartContract\brownie_fund_me> brownie networks add Ethereum ganache-local host=http://127.0.0.1:7545 chainid=5777

[cromewar]

Hello @NinjaTurtles-cloud

I installed MySQL yesterday. The problem can from my previous SQL installation ?

This could be dangerous as some database servers also uses the same ports as ganache, so reinstalling was a good choice

raise ContractNotFound(f"No contract deployed at {address}") ContractNotFound: No contract deployed at 0x955052702Ce443af7EA19488C852D84eBcf0Ae41 PS D:\Programmations\smartContract\brownie_fund_me> brownie networks add Ethereum ganache-local host=http://127.0.0.1:7545 chainid=5777

the contract not found could be due to a brownie-config.yaml error, on lesson 6 you use the price feed provided by chainlink, so you must put the address your that contract or deploy mocks instead.

[wilonweb]

Hello,

When you say :
the contract not found could be due to a brownie-config.yaml error, on lesson 6 you use the price feed provided by chainlink, so you must put the address your that contract or deploy mocks instead.
( I don't know how to quote an old post )

I didn't really understand what i have to do. ( i still have the contractNotFoud )
ContractNotFound: No contract deployed at 0x955052702Ce443af7EA19488C852D84eBcf0Ae41

and this is my brownie-config.yaml

dependencies:
  # - <organisation/repo>@<version>
  - smartcontractkit/[email protected]
compiler:
  solc:
    remappings:
      - "@chainlink=smartcontractkit/[email protected]"
dotenv: .env
networks:
  rinkeby:
    eth_usd_price_feed: "0x8A753747A1Fa494EC906cE90E9f37563A8AF630e"
    verify: True
  development:
    verify: False
  ganache-local:
    eth_usd_price_feed: "0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419"
    verify: False
wallets:
  from_key: ${PRIVATE_KEY}

I have to take theeth_usd_price_feed: "0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419"` address ?
And if so where should i put it ?

[wilonweb]

Thanks you.
Now I have a valueError

wilfried@DESKTOP-FQ2D16J:~/smartContract/brownie_fund_me/contracts$ brownie run scripts/deploy.py
Brownie v1.18.1 - Python development framework for Ethereum

/home/wilfried/.local/lib/python3.8/site-packages/brownie/project/main.py:731: BrownieEnvironmentWarning: Loaded project has a root folder of '/home/wilfried/smartContract/brownie_fund_me' which is different from the current working directory
  warnings.warn(
Downloading from https://solc-bin.ethereum.org/linux-amd64/solc-linux-amd64-v0.6.12+commit.27d51765
100%|█████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 9.47M/9.47M [00:18<00:00, 524kiB/s]
Using solc version 0.6.12
solc 0.6.12 successfully installed at: /home/wilfried/.solcx/solc-v0.6.12
Compiling contracts...
  Solc version: 0.6.12
  Optimizer: Enabled  Runs: 200
  EVM Version: Istanbul
Generating build data...
 - smartcontractkit/[email protected]/AggregatorInterface
 - smartcontractkit/[email protected]/AggregatorV2V3Interface
 - smartcontractkit/[email protected]/AggregatorV3Interface
 - smartcontractkit/[email protected]/SafeMathChainlink
 - FundMe
 - MockV3Aggregator

BrownieFundMeProject is the active project.
/mnt/c/Users/wilfr/AppData/Roaming/npm/ganache-cli: 11: exec: node: not found
  File "brownie/_cli/__main__.py", line 64, in main
    importlib.import_module(f"brownie._cli.{cmd}").main()
  File "brownie/_cli/run.py", line 45, in main
    network.connect(CONFIG.argv["network"])
  File "brownie/network/main.py", line 50, in connect
    rpc.launch(active["cmd"], **active["cmd_settings"])
  File "brownie/network/rpc/__init__.py", line 75, in launch
    self.process = self.backend.launch(cmd, **kwargs)
  File "brownie/network/rpc/ganache.py", line 69, in launch
    ganache_version = get_ganache_version(cmd_list[0])
  File "brownie/network/rpc/ganache.py", line 114, in get_ganache_version
    raise ValueError("could not read ganache version: {}".format(ganache_version_stdout))
ValueError: could not read ganache version: b''

[cromewar]

Remember to install ganache on WSL trough NVM as is specified on the guide.

[wilonweb]

Hi,
I'm not sure I followed the right guide.
I installed node on WSL but i can't install ganache with it ...
I'm in the good ways ?
It's a conflict with my node Windows Version ?

wilfried@DESKTOP-FQ2D16J:~/smartContract/brownie_fund_me$ node -v
v10.19.0
wilfried@DESKTOP-FQ2D16J:~/smartContract/brownie_fund_me$ npm install -g ganache-cli
bash: /mnt/c/Program Files/nodejs/npm: /bin/sh^M: bad interpreter: No such file or directory

[cromewar]

Yes they are in conflict, as WSL is looking for a instance of the node packages on your C folder instead of /usr/ as this problem is getting harder and harder to solve, I strongly suggest a clean setup.

[wilonweb]

I find a solution on stackOverFlow with nvm. I did these command

sudo apt update && sudo apt install curl -y
curl https://raw.githubusercontent.com/creationix/nvm/master/install.sh | bash 
source ~/.profile 
nvm ls-remote 
nvm install v15 
node --version 

So i could install ganache cli

wilfried@DESKTOP-FQ2D16J:~$ npm install -g ganache-cli
npm WARN deprecated [email protected]: ganache-cli is now ganache; visit https://trfl.io/g7 for details

added 1 package, and audited 102 packages in 20s

2 packages are looking for funding
  run `npm fund` for details

3 vulnerabilities (1 moderate, 2 high)

To address all issues, run:
  npm audit fix

Run `npm audit` for details.
npm notice 
npm notice New major version of npm available! 7.7.6 -> 8.8.0
npm notice Changelog: https://github.com/npm/cli/releases/tag/v8.8.0
npm notice Run npm install -g [email protected] to update!
npm notice 

now when i launch the command brownie run scripts/deploy.py --network ganache-local i have a keyError

wilfried@DESKTOP-FQ2D16J:~/smartContract/brownie_fund_me$ brownie run scripts/deploy.py --network ganache-local
Brownie v1.18.1 - Python development framework for Ethereum

BrownieFundMeProject is the active project.
  File "brownie/_cli/__main__.py", line 64, in main
    importlib.import_module(f"brownie._cli.{cmd}").main()
  File "brownie/_cli/run.py", line 45, in main
    network.connect(CONFIG.argv["network"])
  File "brownie/network/main.py", line 31, in connect
    active = CONFIG.set_active_network(network)
  File "brownie/_config.py", line 76, in set_active_network
    network = self.networks[id_].copy()
KeyError: 'ganache-local'