brownie-token-tester：BrownieEnvironmentError：功能在本地环境中不可用答案

【问题标题】：brownie-token-tester: BrownieEnvironmentError: Functionality not available in local environmentbrownie-token-tester：BrownieEnvironmentError：功能在本地环境中不可用
【发布时间】：2022-08-18 17:46:57
【问题描述】：

我的代码：

from brownie_tokens import MintableForkToken
...
dai = MintableForkToken(dai_addr)

在终端中我运行： brownie run scripts/stake.py --network mainnet-fork-dev

输出是：

Brownie v1.19.0 - Python development framework for Ethereum

CurveFiProject is the active project.

Launching \'ganache-cli --accounts 10 --fork https://eth-mainnet.alchemyapi.io/v2/c40U6PVX1zEFdcRfYVjXMC2X1RBpNKpx --mnemonic brownie --port 8545 --hardfork istanbul\'...

Running \'scripts/stake.py::main\'...
Account 0: 0x66aB6D9362d4F35596279692F0251Db635165871
Account 1: 0x33A4622B82D4c04a53e170c638B944ce27cffce3
Dai address: 0x6B175474E89094C44Da98b954EedeAC495271d0F
  File \"brownie/_cli/run.py\", line 55, in main
    _include_frame=True,
  File \"brownie/project/scripts.py\", line 110, in run
    return_value = f_locals[method_name](*args, **kwargs)
  File \"./scripts/stake.py\", line 21, in main
    dai = MintableForkToken(dai_addr)
  File \"brownie/network/contract.py\", line 884, in __init__
    build, sources = _get_deployment(alias=address_or_alias)
  File \"brownie/network/state.py\", line 603, in _get_deployment
    raise BrownieEnvironmentError(\"Functionality not available in local environment\") from None
BrownieEnvironmentError: Functionality not available in local environment

我的环境：布朗尼版本：v1.19.0 brownie-token-tester 版本：0.3.2 ganache-cli 版本：v6.12.2 Python版本：3.8.13

我在 conda 环境中，我使用 pip 安装了 brownie-token-tester。

有什么方法可以避免错误并使用 MintableForkToken()？谢谢....

标签： python ethereum brownie

【解决方案1】：

我将.from_explorer(address) 添加到MintableForkToken 和Contract 对象，这解决了问题。请看下面：

dai = MintableForkToken.from_explorer(dai_addr) #See here
dai._mint_for_testing(accounts[0], amount)

registry = Contract.from_explorer(registry_addr) #See here
pool_addr = registry.find_pool_for_coins(dai_addr, usdc_addr)
pool = Contract.from_explorer(pool_addr)

dai.approve(pool_addr, amount, {"from": accounts[0]})
pool.add_liquidity([amount, 0, 0], 0, {"from": accounts[0]})

gauges = registry.get_gauges(pool_addr)
gauge_addr = gauges[0][0]
gauge_contract = interface.LiquidityGauge(gauge_addr)

lp_token = MintableForkToken.from_explorer(gauge_contract.lp_token())
lp_token.approve(gauge_addr, amount, {"from": accounts[0]})
gauge_contract.deposit(lp_token.balanceOf(accounts[0]), {"from": accounts[0]})

您需要将 Etherscan API 密钥添加到给定的网络：

brownie networks modify mainnet-fork explorer=https://api.etherscan.io/api?apikey=_____________________

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