接收节点先对MCGA地址验证有效性，并使用发送节点的私钥来对消息中的签名进行验证。
The nodes that receive the messages need to validate the MCGA and the signature of the messages by using the public key.
接收节点先对MCGA地址验证有效性，并使用发送节点的私钥来对消息中的签名进行验证。
The nodes that receive the messages need to validate the MCGA and the signature of the messages by using the public key.
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