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7.3: Integrating with Hardware Wallets
ℹ️ NOTE: This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.
One of the greatest powers of PSBTs is the ability to hand transactions off to hardware devices. This will be a great development tool for you if you continue to program with Bitcoin. However, it will be hard for you to use if you've set up a VM on Linode per §2.2 or used even more farflung options such as the setup of an AWS linked in §2.3, because obviously you have no way to hook a hardware device up to a VM.
So, you have three options: (1) read along without testing the code; (2) skip straight ahead to Chapter 8: Expanding Bitcoin Transactions in Other Ways; or (3) install Bitcoin on a local machine to fully test these commands. We suggest option #1.
⚠️ VERSION WARNING: This is an innovation from Bitcoin Core v 0.17.0. Earlier versions of Bitcoin Core will not be able to work with the PSBT while it is in process (though they will still be able to recognize the final transaction).
The methodology for integrating with a Hardware Wallet that is described in this chapter depends on the Bitcoin Hardware Wallet Interface released through Bitcoin Core and builds on the installation and usage instructions found there.
Install Bitcoin Core on a Local Machine
If you just plan to read over this section and not try to work with the commands until you have a local development environment set up, you can skip this instruction, which is about creating a Bitcoin Core installation on a local machine such as a Mac or UNIX machine.
Link to a Ledger
Import Addresses
Create a Transaction with PSBT
Summary: Integrating with Hardware Wallets
🔥 What's the power of HWI?
What's Next?
Move on to "Bitcoin Scripting" with Chapter Seven: Introducing Bitcoin Scripts.