آلة الحقيقة على السلسلة لـ X Layer.

import { OptimisticOracleV3Interface } from "./OOv3.sol";

contract MyMarket {
    OptimisticOracleV3Interface public immutable oo;
    IERC20 public immutable bondToken;

    function resolve(bytes32 marketId, string calldata claim) external {
        uint256 bond = oo.getMinimumBond(address(bondToken));
        bondToken.transferFrom(msg.sender, address(this), bond);
        bondToken.approve(address(oo), bond);

        bytes32 assertionId = oo.assertTruth(
            bytes(claim),
            msg.sender,           // asserter
            address(this),        // callback target
            address(0),           // default escalation
            7200,                 // 2h liveness
            bondToken,
            bond,
            "ASSERT_TRUTH",
            bytes32(0)
        );
        markets[marketId] = assertionId;
    }

    function assertionResolvedCallback(
        bytes32 assertionId,
        bool truthful
    ) external {
        require(msg.sender == address(oo));
        // settle market based on truthful
    }
}