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IVotingStrategy.sol
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IVotingStrategy.sol
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// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.8.17;
/**
* @notice Defines the abstract contract for voting algorithms on grants
* within a round. Any new voting algorithm would be expected to
* extend this abstract contract.
* Every IVotingStrategy contract would be unique to RoundImplementation
* and would be deployed before creating a round
*/
abstract contract IVotingStrategy {
// --- Data ---
/// @notice Round address
address public roundAddress;
// --- Modifier ---
/// @notice modifier to check if sender is round contract.
modifier isRoundContract() {
require(roundAddress != address(0), "error: voting contract not linked to a round");
require(msg.sender == roundAddress, "error: can be invoked only by round contract");
_;
}
// --- Core methods ---
/**
* @notice Invoked by RoundImplementation on creation to
* set the round for which the voting contracts is to be used
*
*/
function init() external virtual {
require(roundAddress == address(0), "init: roundAddress already set");
roundAddress = msg.sender;
}
/**
* @notice Invoked by RoundImplementation to allow voter to case
* vote for grants during a round.
*
* @dev
* - allows contributor to do cast multiple votes which could be weighted.
* - should be invoked by RoundImplementation contract
* - ideally IVotingStrategy implementation should emit events after a vote is cast
* - this would be triggered when a voter casts their vote via grant explorer
*
* @param _encodedVotes encoded votes
* @param _voterAddress voter address
*/
function vote(bytes[] calldata _encodedVotes, address _voterAddress) external virtual payable;
}