Initial commit with 🏗️ create-eth @ 2.0.4

packages/hardhat/contracts/02_Optimistic/Decider.sol

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.8.0 <0.9.0;
+
+contract Decider {
+    address public owner;
+    IOptimisticOracle public oracle;
+
+    event DisputeSettled(uint256 indexed assertionId, bool resolvedValue);
+
+    constructor(address _oracle) {
+        owner = msg.sender;
+        oracle = IOptimisticOracle(_oracle);
+    }
+
+    /**
+     * @notice Settle a dispute by determining the true/false outcome
+     * @param assertionId The ID of the assertion to settle
+     * @param resolvedValue The true/false outcome determined by the decider
+     */
+    function settleDispute(uint256 assertionId, bool resolvedValue) external {
+        require(assertionId >= 1, "Invalid assertion ID");
+
+        // Call the oracle's settleAssertion function
+        oracle.settleAssertion(assertionId, resolvedValue);
+
+        emit DisputeSettled(assertionId, resolvedValue);
+    }
+
+    function setOracle(address newOracle) external {
+        require(msg.sender == owner, "Only owner can set oracle");
+        oracle = IOptimisticOracle(newOracle);
+    }
+
+    /**
+     * @notice Allow the contract to receive ETH
+     */
+    receive() external payable {}
+}
+
+interface IOptimisticOracle {
+    function settleAssertion(uint256, bool) external;
+}