關鍵錯誤：巧克力蛋糕測試期間的“eth_usd_price_feed”

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


def test_get_entrance_fee():
   account = accounts[0]
   lottery = Lottery.deploy(
       config["networks"][network.show_active()]["eth_usd_price_feed"],
       {"from": account},
   )
   assert lottery.getEntranceFee() > Web3.toWei(0.012, "ether")
   assert lottery.getEntranceFee() < Web3.toWei(0.015, "ether")

我認為錯誤出在您的布朗尼配置文件中。網路：分支應如下所示：

networks:
 mainnet-fork-dev:
   eth_usd_price_feed: '0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419'
 mainnet-fork:
   eth_usd_price_feed: '0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419'
 development:
   eth_usd_price_feed: '0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419'

networks即在和之間應該有一個網路名稱eth-usd-price-feed

引用自：https://ethereum.stackexchange.com/questions/115488