geunee20
commented
2 years ago helpful_scripts.py is here
from brownie import network, config, accounts, MockV3Aggregator
from web3 import Web3
DECIMALS = 8
STARTING_PRICE = 200000000000
LOCAL_BLOCKCHAIN_ENVIRONMENTS = ["development", "ganache-local"]
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(f"Deploying Mocks...")
if len(MockV3Aggregator) <= 0:
mock_aggregator = MockV3Aggregator.deploy(
DECIMALS, Web3.toWei(STARTING_PRICE, "ether"), {"from": get_account()}
)
print("Mocks Deployed!")fund_and_withdraw.py
from brownie import FundMe
from scripts.helpful_scripts import get_account
def fund():
fund_me = FundMe[-1]
account = get_account()
entrance_fee = fund_me.getEntranceFee()
print(entrance_fee)
print(f"The current entry fee is {entrance_fee}")
print("Funding")
fund_me.fund({"from": account, "value": entrance_fee})
def main():
fund()deploy.py
from brownie import FundMe, MockV3Aggregator, network, config
from scripts.helpful_scripts import (
get_account,
deploy_mocks,
LOCAL_BLOCKCHAIN_ENVIRONMENTS,
)
from web3 import Web3
def deploy_fund_me():
account = get_account()
# pass the price feed address to our fundme contract
# if we are on a persistent network like rinkeby, use the associated address
# otherwise, deploy mocks
if network.show_active() not in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
price_feed_address = config["networks"][network.show_active()][
"eth_usd_price_feed"
]
else:
deploy_mocks()
price_feed_address = MockV3Aggregator[-1].address
fund_me = FundMe.deploy(
price_feed_address,
{"from": account},
publish_source=config["networks"][network.show_active()].get("verify"),
)
print(f"Contract deployed to {fund_me.address}")
def main():
deploy_fund_me()
FundMe.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
contract FundMe {
mapping(address => uint256) public addressToAmountFunded;
address[] public funders;
address public owner;
AggregatorV3Interface public priceFeed;
constructor(address _priceFeed) {
priceFeed = AggregatorV3Interface(_priceFeed);
owner = msg.sender;
}
function fund() public payable {
uint256 minimumUSD = 50 * 10**18;
require(
getConversionRate(msg.value) >= minimumUSD,
"You need spend more"
);
addressToAmountFunded[msg.sender] += msg.value;
funders.push(msg.sender);
// what the ETH -> USD conversion rate
}
function getVersion() public view returns (uint256) {
return priceFeed.version();
}
function getPrice() public view returns (uint256) {
(, int256 answer, , , ) = priceFeed.latestRoundData();
return uint256(answer * 10**10);
}
function getConversionRate(uint256 ethAmount)
public
view
returns (uint256)
{
uint256 ethPrice = getPrice();
uint256 ethAmountInUsd = (ethPrice * ethAmount) / 10**18;
return ethAmountInUsd;
}
function getEntranceFee() public view returns (uint256) {
uint256 minimumUSD = 50 * 10**18;
uint256 price = getPrice();
uint256 precision = 1 * 10**18;
return (minimumUSD * precision) / price;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function withdraw() public payable onlyOwner {
payable(msg.sender).transfer(address(this).balance);
for (
uint256 funderIndex = 0;
funderIndex < funders.length;
funderIndex++
) {
address funder = funders[funderIndex];
addressToAmountFunded[funder] = 0;
}
funders = new address[](0);
}
}brownie-config.yaml
dependencies:
# - <organization/repo>@<version>
- smartcontractkit/chainlink-brownie-contracts@0.2.2
compiler:
solc:
remappings:
- '@chainlink=smartcontractkit/chainlink-brownie-contracts@0.2.2'
dotenv: .env
networks:
rinkeby:
eth_usd_price_feed: '0x8A753747A1Fa494EC906cE90E9f37563A8AF630e'
verify: True
development:
verify: False
ganache-local:
verify: False
wallets:
from_key: ${PRIVATE_KEY}
gYomii
Hi, I'm following your course and got an issue at lesson 6.
It's about beginning of fund_and_withdraw.py Here is the error code
Deploying works well but I idk why I got entry fee as 0
++ When I changed to "fund_me.fund({"from": account, "value": 2500000})" in the fund_me_withdraw.py the code works well. I think this problem is caused by getting 0 from fund_me.getEntranceFee() So please go over my FundMe.sol
++ I changed function getEntranceFee() to following code and it works Idk why it works tho. Any explanation?
ERROR CODE