我与ERC1155市场的合同是用来买卖NFT.的。 Error: VM Exception while processing transaction: reverted with reason string 'ERC1155: caller is not owner nor approved'
at NFT1155.balanceOf (@openzeppelin/contracts/token
我已经编写了一个简单的智能契约,ERC1155允许ppl去薄荷NFT,除了mint函数之外,一切都很好。事务是正常的,但是当我检查balanceOf时,它总是返回0,即使是在造币之后。SPDX-License-Identifier: MIT
import "@openzeppelin/contracts-upgradeable/token/ERC1155contracts-upgradeable/security/PausableUpgradeabl