V6创建interface语法有变；删掉不必要代码L70 #175
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删掉之后重新跑一遍代码，是成功的 |
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V6 版本创建interface对象的语法： const iface = new ethers.Interface(contractABI) |
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Ethers第23讲《抢跑交易》，L7代码是错的(或者多余）:
console.log(
编号${aimTokenId.add(1)}的NFT的持有者是:${await contractFM.ownerOf(aimTokenId.add(1))}) // tx.from被wallet.address抢跑，mint了下一个nft理论上，抢跑交易成功后，aimTokenId.add(1)还没有被mint, 不存在onwer, 所以contractFM.ownerOf(aimTokenId.add(1))是一个空值，测试了很多次都会报错，建议删掉，不影响整段代码逻辑。