> For the complete documentation index, see [llms.txt](https://dexx.gitbook.io/dexx-zhong-wen-jiao-cheng/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dexx.gitbook.io/dexx-zhong-wen-jiao-cheng/chang-jian-wen-ti/te-shu-ji-zhi-de-dai-bi.md).

# 特殊机制的代币？

· 限购与限卖机制\
某些代币会限制在同一个区块内，最多买入/卖出几笔交易。\
\
· 黑名单机制\
通过智能合约限制某一个地址转账/售出代币\
\
· 交易税机制\
某些代币项目会在每笔交易中收取一定比例的交易税，用于不同的目的，如燃烧（销毁）、返还给持有者、注入流动性或用于项目开发。交易税没有上限，部分代币会调整为非常高的税收以保证流动性。\
\
· 位数机制\
某些代币仅允许购买/出售整数代币/小数点后几位的代币\
\
· 修改余额机制\
某些代币会通过合约代码直接修改用户的代币余额。\
\
以上仅列举几个常见的特殊机制。\
链上发展更新速度迅猛，特殊机制层出不穷。在投资时请仔细思考风险。DEXX不对任何特殊机制造成的损失负责。


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