70 lines
1.8 KiB
Solidity
70 lines
1.8 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.6.0;
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import "./Core.sol";
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abstract contract Delegation is Core {
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/// @notice Delegatee records
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mapping(address => address) public delegatedTo;
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event Delegated(address indexed account, address indexed to);
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event Undelegated(address indexed account, address indexed from);
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function delegate(address to) external {
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address previous = delegatedTo[msg.sender];
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require(
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to != msg.sender && to != address(this) && to != address(0) && to != previous,
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"Governance: invalid delegatee"
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);
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if (previous != address(0)) {
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emit Undelegated(msg.sender, previous);
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}
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delegatedTo[msg.sender] = to;
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emit Delegated(msg.sender, to);
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}
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function undelegate() external {
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address previous = delegatedTo[msg.sender];
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require(previous != address(0), "Governance: tokens are already undelegated");
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delegatedTo[msg.sender] = address(0);
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emit Undelegated(msg.sender, previous);
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}
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function proposeByDelegate(
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address from,
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address target,
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string memory description
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) external returns (uint256) {
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require(delegatedTo[from] == msg.sender, "Governance: not authorized");
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return _propose(from, target, description);
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}
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function _propose(
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address proposer,
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address target,
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string memory description
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) internal virtual returns (uint256);
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function castDelegatedVote(
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address[] memory from,
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uint256 proposalId,
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bool support
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) external virtual {
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for (uint256 i = 0; i < from.length; i++) {
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require(delegatedTo[from[i]] == msg.sender, "Governance: not authorized");
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_castVote(from[i], proposalId, support);
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}
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if (lockedBalance[msg.sender] > 0) {
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_castVote(msg.sender, proposalId, support);
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}
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}
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function _castVote(
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address voter,
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uint256 proposalId,
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bool support
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) internal virtual;
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}
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