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07_3_Integrating_with_Hardware_Wallets.md
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@ -248,13 +248,18 @@ $ bitcoin-cli -rpcwallet=ledger listunspent
Watching and receiving payments is just half-the-battle. You may also want to make payments using accounts held by your hardware wallet. This is a fourth realworld example of PSBT, per the process we learned in [§7.1: Creating a Partially Signed Bitcoin Transaction](7_1_Creating_a_Partially_Signed_Bitcoin_Transaction.md). Watching and receiving payments is just half-the-battle. You may also want to make payments using accounts held by your hardware wallet. This is a fourth realworld example of PSBT, per the process we learned in [§7.1: Creating a Partially Signed Bitcoin Transaction](7_1_Creating_a_Partially_Signed_Bitcoin_Transaction.md).
The commands work exactly the same. In this case, we use `walletcreatefundedpsbt` because this is a situation where we don't care what UTXOs are used:
```
$ bitcoin-cli -named -rpcwallet=ledger walletcreatefundedpsbt inputs='''[]''' outputs='''[{"tb1qcaedd724gts3aug73m78c7nfsv9d8zs9q6h2kd":0.015}]''' $ bitcoin-cli -named -rpcwallet=ledger walletcreatefundedpsbt inputs='''[]''' outputs='''[{"tb1qcaedd724gts3aug73m78c7nfsv9d8zs9q6h2kd":0.015}]'''
{ {
"psbt": "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", "psbt": "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",
"fee": 0.00000209, "fee": 0.00000209,
"changepos": 1 "changepos": 1
} }
```
We can take a look at the PSBT and verify that it looks rational:
```
$ psbt="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" $ psbt="cHNidP8BAJoCAAAAAri6BLjKQZGO9Y1iVIYbxlxBJ2kqsTPWnxGaH4HrSjxbAAAAAAD+////leV0hwJ0fO40RmhuFVIYtO16ktic2J4vJFLAsT5TM8cBAAAAAP7///8CYOMWAAAAAAAWABTHctb5VULhHvEejvx8emmDCtOKBU+gBwAAAAAAFgAU9Ojd5ds3CJi1fIRWbj92CYhQgX0AAAAAAAEBH0BCDwAAAAAAFgAUABk8i/Je8Fb41FcaHD9lEj5f54giBgMBaNlILisC1wJ/tKie3FStqhrfcJM09kfQobBTOCiuxRiaHVILVAAAgAEAAIAAAACAAAAAADkCAAAAAQEfQEIPAAAAAAAWABQtTxOfqohTBNFWFqFm0tUVdK9KXSIGAqATz5xLX1aJ2SUwNqPkd8+YaJYm94FMlPCScm8Rt0GrGJodUgtUAACAAQAAgAAAAIAAAAAAAAAAAAAAIgID2UK1nupSfXC81nmB65XZ+pYlJp/W6wNk5FLt5ZCSx6kYmh1SC1QAAIABAACAAAAAgAEAAAABAAAAAA=="
$ bitcoin-cli decodepsbt $psbt $ bitcoin-cli decodepsbt $psbt
@ -371,7 +376,9 @@ $ bitcoin-cli decodepsbt $psbt
], ],
"fee": 0.00000209 "fee": 0.00000209
} }
```
And as usual, `analyzepsbt` will show us how far we've gotten:
```
$ bitcoin-cli analyzepsbt $psbt $ bitcoin-cli analyzepsbt $psbt
{ {
"inputs": [ "inputs": [
@ -401,10 +408,18 @@ $ bitcoin-cli analyzepsbt $psbt
"fee": 0.00000209, "fee": 0.00000209,
"next": "signer" "next": "signer"
} }
```
Because we imported that keypool, `bitcoin-cli` has all the information it needs to fill in the inputs, it just can't sign because the private keys are held on the hardware wallet.
That's where HWI comes in, with the `signtx` command. We just send along our PSBT:
```
$ hwi -f 9a1d520b signtx $psbt $ hwi -f 9a1d520b signtx $psbt
{"psbt": "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"} {"psbt": "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"}
```
Expect to have to do some fiddling with your hardware wallet at this point. It'll probably tell you that it doesn't know about the inputs (because it's not connected to the net), and it'll probably ask you to confirm the outputs and the fee. When you're done, it should return a new PSBT.
When you analyze this, you'll see that it's ready to be finalized:
```
$ bitcoin-cli analyzepsbt $psbt_f $ bitcoin-cli analyzepsbt $psbt_f
{ {
"inputs": [ "inputs": [
@ -424,25 +439,27 @@ $ bitcoin-cli analyzepsbt $psbt_f
"fee": 0.00000209, "fee": 0.00000209,
"next": "finalizer" "next": "finalizer"
} }
```
At this point you're back into standard territory:
check inputs, outputs, fees ```
$ bitcoin-cli finalizepsbt $psbt_f
bitcoin-cli finalizepsbt $psbt_f
{ {
"hex": "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", "hex": "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",
"complete": true "complete": true
} }
$ hex=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
hex=02000000000102b8ba04b8ca41918ef58d6254861bc65c4127692ab133d69f119a1f81eb4a3c5b0000000000feffffff95e5748702747cee3446686e155218b4ed7a92d89cd89e2f2452c0b13e5333c70100000000feffffff0260e3160000000000160014c772d6f95542e11ef11e8efc7c7a69830ad38a054fa0070000000000160014f4e8dde5db370898b57c84566e3f76098850817d024730440220031910964d9fa84331bcfe78596ca216195f4ae97db1de06cca0e17c6a6695ec0220761e8f7cd7596320588eab8b1c50c3dcb31a8cc36853ea40d348bdc14f93e95f0121030168d9482e2b02d7027fb4a89edc54adaa1adf709334f647d0a1b0533828aec50247304402207e6de93db2b9f50fee095867c607d3f3e10c5a68b529a3819521be3e866c214802205c817cf2625ec88d8b9a177a49ec0816d6b2d8923782249d8cf69554aeae6f17012102a013cf9c4b5f5689d9253036a3e477cf98689626f7814c94f092726f11b741ab00000000
$ bitcoin-cli sendrawtransaction $hex $ bitcoin-cli sendrawtransaction $hex
45f996d4ff8c9e9ab162f611c5b6ad752479ede9780f9903bdc80cd96619676d 45f996d4ff8c9e9ab162f611c5b6ad752479ede9780f9903bdc80cd96619676d
```
You've successfully sent funds using the private keys held on your hardware wallet!
## Summary: Integrating with Hardware Wallets ## Summary: Integrating with Hardware Wallets
> :fire: ***What's the power of HWI?*** Hardware wallets can offer better protection by keeping your private keys offline, protected in the hardware. Fortunately, there's still a way to interact with them using `bitcoin-cli`. You just install HWI and it will then allow you to (1) import public keys to watch them; and (2) send it PSBTs for signing.
> :fire: ***What's the power of HWI?*** HWI lets you interact with hardware wallets using all of the commands of `bitcoin-cli` that you've learned to date. You can make raw transactions of any sort, then send PSBTs to the hardware wallets for signing. Thus, you have all of the power of Bitcoin Core, but you also have the security of a hardware device.
## What's Next? ## What's Next?
Move on to "Bitcoin Scripting" with [Chapter Seven: Introducing Bitcoin Scripts](07_0_Introducing_Bitcoin_Scripts.md). Expand Bitcoin Transactions more with [Chapter Eight: Expanding Bitcoin Transactions in Other Ways](08_0_Expanding_Bitcoin_Transactions_Other.md).