与松露的迁移合同使我可以恢复交易

Question

我的合同.sol文件如下所示：

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;
import "@openzeppelin/contracts/token/ERC777/ERC777.sol";
contract ERC777MainToken is ERC777{
constructor(address[] memory defaultOperators) ERC777("COIN", "COIN", defaultOperators) { }
}

迁移看起来是这样的：

const ERC777MainToken = artifacts.require("ERC777MainToken");
module.exports = async function(_deployer) {
const mainToken = await _deployer.deploy(ERC777MainToken, ["0x5d95F05Dd72A5cB9ea2ee2DC271B03A41C933Cad"])
};

在truffle migrate上，我得到以下错误：

"ERC777MainToken" hit a require or revert statement somewhere in its constructor. Try:
* Verifying that your constructor params satisfy all require conditions.
* Adding reason strings to your require statements.
at /usr/local/lib/node_modules/truffle/build/webpack:/packages/deployer/src/deployment.js:365:1
at processTicksAndRejections (internal/process/task_queues.js:93:5)
at Migration._deploy (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:74:1)
at Migration._load (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:61:1)
at Migration.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:212:1)
at Object.runMigrations (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:150:1)
at Object.runFrom (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:110:1)
at Object.runAll (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:114:1)
at Object.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:79:1)
at runMigrations (/usr/local/lib/node_modules/truffle/build/webpack:/packages/core/lib/commands/migrate.js:263:1)
at Object.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/core/lib/commands/migrate.js:228:1)
at Command.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/core/lib/command.js:136:1)

有什么想法吗？为什么？我已经检查了每个构造函数，没有人有任何必要的条件。

Answer 1

我发现了问题。来自open zeppelin的ERC777合同有一个硬编码的member_ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24)，它是主网的global ERC1820 Registry，但由于我在本地网，这个地址最多算不了什么

contract ERC777 is Context, IERC777, IERC20 {
using Address for address;
IERC1820Registry constant internal _ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
mapping(address => uint256) private _balances;
....
}

构造函数正在字符串中访问以下地址上的合同：

constructor(
string memory name_,
string memory symbol_,
address[] memory defaultOperators_
) {
_name = name_;
_symbol = symbol_;
_defaultOperatorsArray = defaultOperators_;
for (uint256 i = 0; i < defaultOperators_.length; i++) {
_defaultOperators[defaultOperators_[i]] = true;
}
// register interfaces
_ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC777Token"), address(this));
_ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC20Token"), address(this));
}

但是由于本地网络上的这个地址可能是空的，并且100%不是它应该是的，所以事务被恢复。

Answer 2

如果您的代码中的合同中有require或revert语句，请添加如下错误消息：require(condition, errorMessage);或revert (errorMessage);