Lesson 6 : ValueError: Unknown URI - must be a path to an IPC socket ...

[wilonweb]

Hello
when i run deploy.py i got an error.

ValueError: Unknown URI - must be a path to an IPC socket, a websocket beginning with 'ws' 
or a URL beginning with 'http'

Do you know what it mean ?

This is my code
deploy.py

from brownie import FundMe, MockV3Aggregator, network, config
from scripts.helpful_scripts import (
    get_account,
    deploy_mocks,
    LOCAL_BLOCKCHAIN_ENVIRONMENTS,
)


def deploy_fund_me():
    account = get_account()
    if network.show_active() not in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
        price_feed_adress = config["network"][network.show_active()][
            "eth_usd_price_feed"
        ]
    else:
        deploy_mocks()
        price_feed_adress = MockV3Aggregator[-1].address

    fund_me = FundMe.deploy(
        price_feed_adress,
        {"from": account},
        publish_source=config["networks"][network.show_active()].get("verify"),
    )
    print(f"Contract deployed to {fund_me.address}")
    mock_aggregator = MockV3Aggregator.deploy(
        18, 2000000000000000000000, {"from": account}
    )
    price_feed_address = mock_aggregator.address
    print("Mock deployed!")


def main():

    deploy_fund_me()

helpful_script.py

from brownie import network, config, accounts, MockV3Aggregator
from web3 import Web3

LOCAL_BLOCKCHAIN_ENVIRONMENTS = ["devlopment", "ganache-local"]

DECIMALS = 18
STARTING_PRICE = 2000


def get_account():
    if network.show_active() in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
        return accounts[0]
    else:
        return accounts.add(config["wallets"]["from_key"])


def deploy_mocks():
    print(f"The Active network is {network.show_active()}")
    print("Deploying Mocks ...")
    if len(MockV3Aggregator) <= 0:
        MockV3Aggregator.deploy(
            DECIMALS, Web3.toWei(STARTING_PRICE, "ether"), {"from": get_account()}
        )
    print("Mocks Deployed!")

MockV3Aggregator.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

import "@chainlink/contracts/src/v0.6/interfaces/AggregatorV2V3Interface.sol";

/**
 * @title MockV3Aggregator
 * @notice Based on the FluxAggregator contract
 * @notice Use this contract when you need to test
 * other contract's ability to read data from an
 * aggregator contract, but how the aggregator got
 * its answer is unimportant
 */
contract MockV3Aggregator is AggregatorV2V3Interface {
    uint256 public constant override version = 0;

    uint8 public override decimals;
    int256 public override latestAnswer;
    uint256 public override latestTimestamp;
    uint256 public override latestRound;

    mapping(uint256 => int256) public override getAnswer;
    mapping(uint256 => uint256) public override getTimestamp;
    mapping(uint256 => uint256) private getStartedAt;

    constructor(uint8 _decimals, int256 _initialAnswer) public {
        decimals = _decimals;
        updateAnswer(_initialAnswer);
    }

    function updateAnswer(int256 _answer) public {
        latestAnswer = _answer;
        latestTimestamp = block.timestamp;
        latestRound++;
        getAnswer[latestRound] = _answer;
        getTimestamp[latestRound] = block.timestamp;
        getStartedAt[latestRound] = block.timestamp;
    }

    function updateRoundData(
        uint80 _roundId,
        int256 _answer,
        uint256 _timestamp,
        uint256 _startedAt
    ) public {
        latestRound = _roundId;
        latestAnswer = _answer;
        latestTimestamp = _timestamp;
        getAnswer[latestRound] = _answer;
        getTimestamp[latestRound] = _timestamp;
        getStartedAt[latestRound] = _startedAt;
    }

    function getRoundData(uint80 _roundId)
        external
        view
        override
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        )
    {
        return (
            _roundId,
            getAnswer[_roundId],
            getStartedAt[_roundId],
            getTimestamp[_roundId],
            _roundId
        );
    }

    function latestRoundData()
        external
        view
        override
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        )
    {
        return (
            uint80(latestRound),
            getAnswer[latestRound],
            getStartedAt[latestRound],
            getTimestamp[latestRound],
            uint80(latestRound)
        );
    }

    function description() external view override returns (string memory) {
        return "v0.6/tests/MockV3Aggregator.sol";
    }
}

// MockOracle
// Function signatures, event signatures, log topics

[n4n0b1t3]

This error message has nothing to do with your scripts. Can you please post here, after you have removed sensitive data, the output of the error from the terminal?

[wilonweb]

Hello,
I don't know if what i say is okay.
But on my brownie-config.yaml I deployed only rinkeby and eth_usd_feed is already here.
you can check the code here.

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:
    verify: False
wallets:
  from_key: ${PRIVATE_KEY}

[cromewar]

Yea it is, but on your error you were trying to deploy using ganache:

So you must also add the eth_usd_price_feed to your development network.

[wilonweb]

Ok i understand now.
Mock deployed !

[wilonweb]

But if i check on Ganache i don't get "transaction" .
I don't know if is normal. ( beacause on the freeCodeCamp video we can see some transaction when the script is deployed.

BrownieFundMeProject is the active project.

Launching 'ganache-cli.cmd --accounts 10 --hardfork istanbul --gasLimit 12000000 --mnemonic brownie --port 8545'...

Running 'scripts\deploy.py::main'...
Transaction sent: 0xdcee713f8ae3c09c65a9c5b1b54ef9711564629db9be98f032149a33877b7a45
  Gas price: 0.0 gwei   Gas limit: 12000000   Nonce: 0
  FundMe.constructor confirmed   Block: 1   Gas used: 387021 (3.23%)
  FundMe deployed at: 0xcb38256CEC9d733E40F2276b13cE2E736B7d9d94

Contract deployed to 0xcb38256CEC9d733E40F2276b13cE2E736B7d9d94
Transaction sent: 0xffaac2c748d7db7193837e7142b4c1cc1a71513233c09b9a2df477beba5cfac7
  Gas price: 0.0 gwei   Gas limit: 12000000   Nonce: 1
  MockV3Aggregator.constructor confirmed   Block: 2   Gas used: 430695 (3.59%)
  MockV3Aggregator deployed at: 0xa6424e8B4C0D7381E5009B79aFE5D527a892dBe7

Mock deployed!
Terminating local RPC client...

[cromewar]

well on your script you have two deployments which are the contract creation and the mocks deployment, so the last code you've submitted is correct.