# 关于跨链

MetaID V2 从协议设计层面上已支持MetaID运行在比特币及比特币同构区块链上。

只要索引器支持，理论上 PIN 可构建在任何比特币架构的区块链上，所有符合 MetaID 协议格式交易，即便是散落在不同的区块链上，均可收敛于某一个 MetaID 节点下。

对于跨链的支持，理论上和比特币同构的区块链均能支持，具体为：

* 采用 UTXO 架构
* 锁定脚本支持 op\_return 操作符
* 支持采用比特币的经典地址格式（即前缀为”1”的比特币地址格式）

现阶段除了比特币外，以下主流公链均符合 MetaID 支持的条件，在未来相关索引器和钱包支持后，将有望实现支持：

* MicrovisonChain
* Bitcon Cash
* eCash
* Dogecoin
* Litecoin
* Bitcoin SV

但钱包和应用在实现跨链支持时，需具体实现时，需注意以下概念

### Unified Address With One Key

**\[TBD]**

### Unified UTXO Chain

**\[TBD]**


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