kopia lustrzana https://github.com/bugout-dev/dao
49 wiersze
1.4 KiB
Solidity
49 wiersze
1.4 KiB
Solidity
// SPDX-License-Identifier: Apache-2.0
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/**
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* Authors: Moonstream Engineering (engineering@moonstream.to)
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* GitHub: https://github.com/bugout-dev/dao
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*
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* Common storage structure and internal methods for Moonstream DAO ERC20 tokens.
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*/
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pragma solidity ^0.8.0;
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library LibERC20 {
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bytes32 constant ERC20_STORAGE_POSITION =
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keccak256("moonstreamdao.eth.storage.erc20");
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struct ERC20Storage {
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string name;
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string symbol;
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mapping(address => uint256) balances;
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mapping(address => mapping(address => uint256)) allowances;
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address controller;
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uint256 totalSupply;
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}
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function erc20Storage() internal pure returns (ERC20Storage storage es) {
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bytes32 position = ERC20_STORAGE_POSITION;
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assembly {
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es.slot := position
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}
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}
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event ControlTransferred(
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address indexed previousController,
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address indexed newController
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);
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function setController(address newController) internal {
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ERC20Storage storage es = erc20Storage();
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address previousController = es.controller;
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es.controller = newController;
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emit ControlTransferred(previousController, newController);
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}
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function enforceIsController() internal view {
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ERC20Storage storage es = erc20Storage();
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require(msg.sender == es.controller, "LibERC20: Must be controller");
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}
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}
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