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一文了解 NFT 交易协议 ERC721P :代码即法律
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ERC721P 协议发行的 NFT 会有对应的抵押品,去中性化交易协议和套利空间,可以解决 NFT 流动性问题。 原文标题:《ERC721P 惊蛰版:代码即法律》 撰文:PandaDAO ERC721P 全称为 ERC721 Panda,该协议属于 NFT 的去中心化 Swap 协议,由 PandaDAO 社区开发,SlowMist 进行安全审计。在 2022 年的惊蛰前后,团队在内部讨论关于社区 NFT 的事情,那个时候 ERC721P 想法还没有成型,NFT 的画面也远不是今天这个样子的,但是缘分就是如此的巧妙,我们在那个时间萌生了 NFT 的想法,就像惊蛰这个节气一样,惊醒了蛰居了一整个冬天的动物;同时我们也希望,该名字意味者本次加密市场的寒冬终结。所以我们把第一个版本取名叫惊蛰,纪念我们那些过去的日子,也期待社区未来的日子。 在设计阶段,我们希望抛开个人或者某个特定组织对合约的直接干预造成影响,遵循区块链的规则『Code is Law』。因为我们相信,任何伟大的事物,是不受个人或者小部分组织可以影响的,而是由底层的代码确定了它的生命周期和未来它的上限。 ERC721P 最初由 Random Panda Club ( 以下简称 RPC) 使用,也是社区的第一个正式的 NFT 项目。Random Panda Club 的中文叫做随机熊猫俱乐部。所有美好事物的诞生往往是随机性的,并未刻意安排所有进程,宛如上帝抛下了一颗颗巨大的骰子。好比地球的诞生,生命的起源和 web3 的无限可能性。也如同 01 二进制创造了整个互联网世界,熊猫的黑白创造更多的可能性。 ERC721P: 去中心化的 NFT Swap 协议最初,RPC 的每个 NFT 都会锚定 5 万个 $PANDA。简单来说,每个 RPC 可以兑换出 5 万个 $PANDA,而 5 万个 $PANDA 也可以兑换出 1 个 RPC。而 PandaDAO 社区会对市面上流通的 Token 实行 0.005 美金的固定价格回购,也就是是说每个 RPC 的最低可以兑换出 250 美金,随着合约交互的增加,手续费的增加,NFT 的锚定价格也会增加。 因为该设计,在 NFT 市场上也存在套利空间。当 NFT 的价格在公开市场低于锚定价格等值的 ETH。套利者可以购买 NFT,兑换成 $PANDA,再兑换成稳定币。 
当 NFT 价格低于锚定价格的套利流程 如果 NFT 的市场价格高于合约锚定价格,同时 LP 池子中也有 NFT 作品。那么套利者可以购买 $PANDA,再兑换出 NFT,再去公开市场进行出售,实现套利。 但是因为 LP 池子最低有 1000 个 NFT 的下限,如果 LP 池子中少于 1001 个 NFT,则无法完成该套利条件。 
当 NFT 市场价格高于锚定价格,并且 LP 池中有多余 NFT ERC721P 还有一个机制在于每次 Swap 都需要锚定价格 7.5% 的手续费,其中一半会手续费会进入合约增加 NFT 的锚定价格,另外一半手续费则会打入社区国库,用作 NFT 的持续运营,比如 ChainLink 的预言机续费,项目空投等等。这个机制的出现,NFT 的持有者越晚退出,退还的代币越多,所得到的回报越高。同理,当池子中有 NFT 可以 swap 出来,越早兑换,所需要的 Token 越少。 详细公式如下: 
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