What's the prescribed way for communication between multichaind and multichaind-cold?

Question

..to sign raw transactions.

Answer 1

There is no prescribed way, because this will depend on your organization's security preferences and technical capabilities. One common simple solution is a USB key, but this has a certain risk associated with it. The safest is to print out the raw transaction details from one computer, then scan it into another and use OCR to read the data, but this is inefficient. You can also consider using Bluetooth if both computers support it.

Comments

Thanks. However that won't work in the use case I need to solve. We have a lot is users who can't all operate a multichaind. So we were thinking of storing all their keys in a cold node wallet.

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In this case you should be looking in a different direction - using external private keys. Extensive documentation on this is here: https://www.multichain.com/developers/external-key-management/