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如何免费领取a16z的“合并证明”NFT
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今日早间，a16z Crypto 工程合伙人 Michael Blau 和 a16z Crypto 合伙人 Mason Hall 宣布推出一款动态 NFT “Proof of Merge” ，用于证明以太坊网络是否已顺利完成合并。 
具体来说，a16z 找到了一种完全链上的方法，来检验合并是否已经发生。该方法为检查 EVM 的“难度”（DIFFICULTY）指令，这是对具体某个区块被挖出的困难程度的度量。该概念只有在 PoW 共识的语境下才有意义，由于共识将切换至 PoS，通过检查新生成区块的这个“难度”值，智能合约就可以自动确定合并是否已经发生。 回到 Proof of Merge，该 NFT 将根据该“难度”值的变化以及和合并的估计时间输出不同的元数据和插图，总计会在三个不同阶段呈现三种不同的状态。第一阶段，预合并时将显示两个分开的圆圈；第二阶段，随着合并的临近，两个圆圈将开始靠近，直至重叠，形成类似日食的画面；一旦合并发生，形状将转化为最终形式：阴阳符号。 Odaily星球日报注：a16z 还提到，而对于潜在的 PoW 链来说，预计图形将在第二阶段停滞，因为“难度”值永远不会抵达第三阶段的要求，所以永远不会形成最终的形状。 当前，Proof of Merge 已开放了免费铸造，感兴趣的朋友可以通过「https://www.proofofmerge.xyz/」页面免费领取。 打开上述网站后，连接钱包，仿效合并，将下图中的滑轮从最左边滑动至最右边，然后在钱包内确认交易即可（gas 大概需要几美元）。 
Proof of Merge 数量不受限制且完全免费，但只能在以太坊合并完成之前申领，截至目前已有上万个加密钱包地址参与了铸造。 值得一提的是，Proof of Merge 不可交易，NFT 将永久地与铸造地址绑定，因此该 NFT 投机获利就不要想了，但对于有意一同见证合并这一加密货币历史上最重要事件之一的朋友来说，还是可以入手一个作为纪念的。 来源：金色财经 |
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