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Allow tr() import only when Taproot is active #22156

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Merged
merged 1 commit into from
Jun 12, 2021
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Allow tr() import only when Taproot is active #22156

merged 1 commit into from
Jun 12, 2021

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achow101
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@achow101 achow101 commented Jun 5, 2021 •
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To avoid issues around fund loss, only allow descriptor wallets to import tr() descriptors after taproot has activated.

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DrahtBot commented Jun 5, 2021 •
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The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

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This was referenced Jun 5, 2021
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@instagibbs
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slight reword suggestion because I was confused thinking you'd only allow tr() descriptors and not wsh() or anything else

"Allow tr() import to privkey wallets only when Taproot is active"

@achow101 achow101 changed the title Only allow tr() import to privkey wallets when Taproot is active Allow tr() import to privkey wallets only when Taproot is active Jun 6, 2021
@meshcollider meshcollider added this to the 22.0 milestone Jun 9, 2021
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sipa commented Jun 10, 2021

Hmm, any reason to restrict this protection to private key wallets? A watch-only taproot wallet giving out addresses is just as dangerous.

@achow101
Allow tr() import only when Taproot is active
fbf485c 
To avoid issues around fund loss, only allow descriptor wallets
to import tr() descriptors after taproot has activated.
@achow101 achow101 force-pushed the disallow-tr-privkey-import branch from c3875fa to fbf485c Compare June 10, 2021 19:45
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achow101 commented Jun 10, 2021 •
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Updated to disallow import into watch only wallets too.

@achow101 achow101 changed the title Allow tr() import to privkey wallets only when Taproot is active Allow tr() import only when Taproot is active Jun 10, 2021
@michaelfolkson
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Concept ACK. This appears to be at least one wallet restriction that should be in place prior to Taproot being active (I haven't figured out if there are potentially others)

This PR doesn't allow tr() import to Signet wallets either right? Ideally no restrictions would be applied to the Signet wallet.

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This PR doesn't allow tr() import to Signet wallets either right? Ideally no restrictions would be applied to the Signet wallet.

tr() can be imported into signet wallets as taproot is activated on signet. This is not a blanket disallow, it checks for activation.

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sipa commented Jun 10, 2021

utACK fbf485c

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fjahr commented Jun 10, 2021

Code review ACK fbf485c

ghost
ghost reviewed Jun 10, 2021
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test/functional/wallet_taproot.py
Comment on lines -175 to +177
self.num_nodes = 2
self.num_nodes = 3
self.setup_clean_chain = True
self.extra_args = [['-keypool=100'], ['-keypool=100']]
self.extra_args = [['-keypool=100'], ['-keypool=100'], ["-vbparams=taproot:1:1"]]
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nit: self.nodes[1] is not used in this test so can we keep 2 nodes and change self.extra_args for one?

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Node 1 will be used in #21365. I'd like to avoid conflicts with that as much as possible.

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ghost approved these changes Jun 10, 2021
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utACK fbf485c

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ghost commented Jun 12, 2021

  1. Compiled successfully on Fedora 34.
  2. Created a descriptor wallet: bitcoin-cli createwallet "D1" false false "" true true
  3. Tried importing a descriptor and got the error as expected:
$ bitcoin-cli -rpcwallet=D1 importdescriptors '[{"desc" : "tr(c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5,{pk(fff97bd5755eeea420453a14355235d382f6472f8568a18b2f057a1460297556),pk(e493dbf1c10d80f3581e4904930b1404cc6c13900ee0758474fa94abe8c4cd13)})#2rqrdjrh", "timestamp" : "now"}]'
[
  {
    "success": false,
    "error": {
      "code": -4,
      "message": "Cannot import tr() descriptor when Taproot is not active"
    }
  }
]

Few questions

  1. Why is it only for descriptor wallets? importmulti can be used in legacy wallets to import using descriptors
  2. Which other RPCs support importing keys using descriptors?

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laanwj commented Jun 12, 2021

Code review ACK fbf485c

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  1. Why is it only for descriptor wallets? importmulti can be used in legacy wallets to import using descriptors

#22154 implements generic blocking of bech32m addresses (so tr() descriptors and any future segwit versions) in legacy wallets. For legacy wallets, importing bech32m addresses is completely disallowed.

  1. Which other RPCs support importing keys using descriptors?

Just importmulti and importdescriptors.

@laanwj laanwj merged commit b0e5fbf into bitcoin:master Jun 12, 2021
sidhujag pushed a commit to syscoin/syscoin that referenced this pull request Jun 13, 2021
@laanwj
Merge bitcoin#22156: Allow tr() import only when Taproot is active
670372a 
fbf485c Allow tr() import only when Taproot is active (Andrew Chow)

Pull request description:

  To avoid issues around fund loss, only allow descriptor wallets to import `tr()` descriptors after taproot has activated.

ACKs for top commit:
  sipa:
    utACK fbf485c
  fjahr:
    Code review ACK fbf485c
  laanwj:
    Code review ACK fbf485c
  prayank23:
    utACK bitcoin@fbf485c

Tree-SHA512: 83c43376515eea523dbc89bc5a0fde53e54aec492e49a40c2a33d80fc94aac459e232ae07b024b4bd75b58078c8d090bc7a2d69541c5d3d4834d2f4cfc9c8208
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Sjors commented Jun 15, 2021

Post merge concept ACK.

@ryanofsky ryanofsky mentioned this pull request Jun 15, 2021
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@ajtowns ajtowns mentioned this pull request Jun 28, 2021
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gwillen pushed a commit to ElementsProject/elements that referenced this pull request Jun 1, 2022
@apoelstra
Merge b0e5fbf into merged_master (Bitcoin PR bitcoin/bitcoin#22156)
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