derivekey: support xpubs in addition to xprvs #179
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This test checks that "chantools derivekey --rootkey xpriv..." works.
starius
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Jan 9, 2025
Added more derivation paths and corresponding public keys, check in the test that the values returned by the method match to expected values. Also added tpub (testnet xpub). To run "chantools derivekey" with xpubs, use PR lightninglabs/chantools#179
It can work with xpub and xprv to derive child xpub or xpriv and public key. It can be used when only xpub is available.
Now it is possible to derive a public key from xpub: chantools derivekey --rootkey xpub... --path "m/0/0" --neuter
ffranr
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Jan 10, 2025
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| if neuter { | ||
| child, pubKey, err = lnd.DerivePubKey( | ||
| extendedKey, path, | ||
| ) | ||
| } else { | ||
| child, pubKey, wif, err = lnd.DeriveKey( | ||
| extendedKey, path, chainParams, | ||
| ) | ||
| } |
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I think pubKey is the same in both cases. Which means we can just keep the lnd.DeriveKey call, remove the lnd.DerivePubKey calling clause, and then later ignore wif if neuter == true.
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DeriveKey fails if an xpub is passed to it (in derivedKey.ECPrivKey call):
Error: could not derive keys: could not derive private key: unable to create private keys from a public extended key
ffranr
pushed a commit
to lightninglabs/taproot-assets
that referenced
this pull request
Jan 10, 2025
Added more derivation paths and corresponding public keys, check in the test that the values returned by the method match to expected values. Also added tpub (testnet xpub). To run "chantools derivekey" with xpubs, use PR lightninglabs/chantools#179
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Now it is possible to derive a public key from xpub if
--neuteris passed:Example:
Also added tests
TestDeriveKeyXprvandTestDeriveKeyXpub.