Solidity - ImportError：无法从“brownie”导入名称“VRCoordinatorMock”

Question

非常感谢有关此错误的任何帮助。我已经尝试了几件事并查看了 VRF 的合同，但我似乎无法弄清楚。所有其他线程似乎都通过移动文件来解决它，但我的位置正确。如果我能提供其他任何东西，请告诉我。

我是否有可能从我的 .yaml 文件中的错误地址提取？

这是我的 bronwie-config.yaml：

这是我的部署脚本：

from brownie import(network, config, accounts, MockV3Aggregator, VRFCoordinatorMock, LinkToken, Contract)
from web3 import Web3

FORKED_LOCAL_ENVIRONMENTS = ['mainnet-fork-dev']
LOCAL_BLOCKCHAIN_ENVIRONMENTS = ['development','ganache-local']

def get_account(index = None, id = None):
    if index:
        return accounts[index]
    
    if id:
        return accounts.load(id)
    
    if network.show_active() in LOCAL_BLOCKCHAIN_ENVIRONMENTS or network.show_active() in FORKED_LOCAL_ENVIRONMENTS:
        return accounts[0]

    
    return accounts.add(config['wallets']['from_key'])

contract_to_mock = {
    'eth_usd_price_feed': MockV3Aggregator, 'vrf_coordinator': VRFCoordinatorMock, 'link_token': LinkToken
}
def get_contract(contract_name):
    '''This function will grab the contract addresses from brownie config if defined. 
       Otherwise, it will deply a mock version of that contract, and retrun that mock contract.
            Args:
                contract_name (string)
            returns:
                brownie.network.contract.ProjectContract: the most recently deployed version of
    '''
    contract_type = contract_to_mock[contract_name]
    if network.show_active() in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
        if len(contract_type) <= 0:
            deploy_mocks()
        contract = contract_type[-1]
        #MockV3Aggregator[-1]
    else:
        contract_address = config['networks'][network.show_active()][contract_name]
        contract = Contract.from_abi(contract_type._name, contract_address, contract_type.abi)
        #MockV3Aggregator.abi
    return contract


DECIMALS = 8
INITIAL_VALUE = 200000000000

def deploy_mocks(decimals= DECIMALS, initial_value= INITIAL_VALUE):
    account = get_account()
    MockV3Aggregator.deploy(decimals, initial_value, {'from':account})
    link_token = LinkToken.deploy({'from':account})
    VRFCoordinatorMock.deploy(link_token.address,{'from':account})
    print('deployed')

目录：

Answer 1

您使用了 VRFCConsumerBase 版本 1 并在 .yaml 文件中添加了版本 2 的地址。版本 1 的 brownie-config.yaml 中的 VRF_Coordinator 地址必须取自 here。