아이템 구매 (purchaseItem)

function purchaseItem(
    string memory uuid,
    string memory itemId,
    uint256 purchaseItemPrice
) external nonReentrant whenNotPaused {
    ...        
    emit PurchaseItemSuccess(
        purchaseInfo.buyer,
        purchaseInfo.uuid,
        purchaseInfo.itemId,
        purchaseInfo.purchaseId,
        purchaseInfo.purchasedItemPrice
    );
}

• Parameters

Type	Value	Description
string	uuid	사용자 UUID
string	itemId	구매할 Item ID
uint256	purchaseItemPrice	구매 지불액 (wei)

• Errors

Message	Cause
FandomShop: Item already purchased	요청한 유저가 이미 구매한 아이템 (중복구매불가)
FandomShop: UUID should not be empty	uuid가 비었음
FandomShop: Item id should not be empty	itemId가 비었음
FandomShop: Purchase item price should be greater than zero	purchaseItemPrice가 비었음
FandomShop: Payment token transfer failed	전송 후 입금이 정상적으로 이루어지지 않음. 재시도 요망

• Event

    struct PurchaseHistory {
        uint256 purchaseId; // Purchase ID (PK)
        uint256 purchasedItemPrice; // 구매 아이템 가격 (wei)
        address buyer; // 구매자 EOA
        string uuid; // 구매자 UUID
        string itemId; // 구매한 Item ID
    }