fix(keymap): use correct derivation_path for keys with origin
#863
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- Fixes the implementation of `GetKey` for `KeyRequest::Bip32` when there's `Xpriv` has an origin, and it matches with the given `KeyRequest::Bip32` derivation_path. It should strip the matching part, to correctly derive the key at the correct child number. - Updates the existing test to the correct and expected behavior.
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| if let Some(matched_path) = descriptor_xkey.matches(key_source, secp) { | ||
| let (_, full_path) = key_source; | ||
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| let derivation_path = &full_path[matched_path.len()..]; |
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The matched path includes the xkey.derivation_path, therefore we need to derive the xkey.derivation_path together with the remaining un-matched path. That's my hunch.
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GetKeyforKeyRequest::Bip32when there'sXprivhas an origin, and it matches with the givenKeyRequest::Bip32derivation_path. It should strip the matching part, to correctly derive the key at the correct child number.