function verifyCreditSignature(
    DataTypes.Credit memory credit,
    address signer,
    uint8 v,
    bytes32 r,
    bytes32 s
) private view returns (bool) {
    return
        SignatureChecker.verify(
            hashCredit(credit),
            signer,
            v,
            r,
            s,
            getDomainSeparator()
        );
}
struct Credit {
    address token;
    uint256 amount;
    bytes orderId;
    uint8 v;
    bytes32 r;
    bytes32 s;
}
function matchBidWithTakerAsk(OrderTypes.TakerOrder calldata takerAsk, OrderTypes.MakerOrder calldata makerBid)
    external
    override
    nonReentrant
{
    require((!makerBid.isOrderAsk) && (takerAsk.isOrderAsk), "Order: Wrong sides");
    require(msg.sender == takerAsk.taker, "Order: Taker must be the sender");
    // Check the maker bid order
    bytes32 bidHash = makerBid.hash();
    _validateOrder(makerBid, bidHash);
    (bool isExecutionValid, uint256 tokenId, uint256 amount) = IExecutionStrategy(makerBid.strategy)
        .canExecuteTakerAsk(takerAsk, makerBid);
    require(isExecutionValid, "Strategy: Execution invalid");
    // Update maker bid order status to true (prevents replay)
    _isUserOrderNonceExecutedOrCancelled[makerBid.signer][makerBid.nonce] = true;
    // Execution part 1/2
    ...
}
