ERC20：津貼不足

呼叫 createVaultItem 函式時出現此錯誤。我的solidity知識還不夠。為什麼我會收到此錯誤？

市場.sol

 function createVaultItem(address nftContract,uint256 tokenId,uint256 price) public payable nonReentrant {
   require(price > 0, "Price cannot be zero");
   _itemIds.increment();
   require(msg.value == listingFee, "Price cannot be listing fee");
   require(mytoken.transferFrom(msg.sender,address(nftContract), listingFee), "Sending Failed");
   uint256 itemId = _itemIds.current();
   idToVaultItem[itemId] =  VaultItem(itemId,nftContract,tokenId,payable(msg.sender),payable(address(0)),price,false);
   IERC721(nftContract).transferFrom(msg.sender, address(this), tokenId);
   emit VaultItemCreated(itemId,nftContract,tokenId,msg.sender,address(0),price,false);
   }

nft.sol

   function createNFT(string memory tokenURI) public returns (uint) {
       _tokenIds.increment();
       uint256 newItemId = _tokenIds.current();
       _mint(msg.sender, newItemId);
       _setTokenURI(newItemId, tokenURI);
       setApprovalForAll(contractAddress, true);
       return newItemId;
   }

乙太.js

   async function createNFT(url) {
       let amount = 900000000000;
       const web3Modal = new Web3Modal()
       const connection = await web3Modal.connect()
       const provider = new ethers.providers.Web3Provider(connection)
       const signer = provider.getSigner()
       let cri = new ethers.Contract(hhtoken,Token,signer)
       await cri.approve(hhnft,amount)
       let contract = new ethers.Contract(nftcontract, NFT, signer)
       let transaction = await contract.createNFT(url)
       let tx = await transaction.wait()
       let event = tx.events[0]
       let value = event.args[2]
       let tokenId = value.toNumber()
       contract = new ethers.Contract(market, Market, signer)
       await cri.approve(hhmarket,amount)
       let listingFee = await contract.getListingFee()
       listingFee = listingFee.toString() 
       const price = ethers.utils.parseUnits(formInput.price, 'ether')
       transaction = await contract.createVaultItem(nftcontract, tokenId, price, { value: listingFee })
       await transaction.wait()
       router.push('/')
   }```

您需要增加 ERC20 代幣合約內的限額。

檢查哪個 transferFrom() 失敗，並將“from”的允許值增加到缺少允許的 transferFrom 的“to”

使用您需要的參數嘗試類似 myToken.increaseAllowance() 的方法。

希望這可以幫助

引用自：https://ethereum.stackexchange.com/questions/138361