My friend transferred a total of 1120u to my wallet in two transactions. The first time 1u confirmed that I received the success prompt, and then transferred me 1119u. However, it has been several hours, and there is nothing in my wallet. But there is a record of 1120u in the transaction history, yet my wallet still shows the same few u. May I ask where did this 1120u go? What did I do wrong?