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[descriptor] Add descriptor templates, add DerivableKey

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This commit is contained in:
Alekos Filini
2020-09-22 16:12:09 +02:00
parent c51ba4a99f
commit c93cd1414a
7 changed files with 553 additions and 44 deletions
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38
src/keys/bip39.rs
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@@ -34,33 +34,45 @@ use miniscript::ScriptContext;
use bip39::{Mnemonic, Seed};
use super::{any_network, DescriptorKey, KeyError, ToDescriptorKey};
use super::{any_network, DerivableKey, DescriptorKey, KeyError};
pub type MnemonicWithPassphrase = (Mnemonic, Option<String>);
impl<Ctx: ScriptContext> ToDescriptorKey<Ctx> for (Seed, bip32::DerivationPath) {
fn to_descriptor_key(self) -> Result<DescriptorKey<Ctx>, KeyError> {
let xprv = bip32::ExtendedPrivKey::new_master(Network::Bitcoin, &self.0.as_bytes())?;
let descriptor_key = (xprv, self.1).to_descriptor_key()?;
impl<Ctx: ScriptContext> DerivableKey<Ctx> for Seed {
fn add_metadata(
self,
source: Option<(bip32::Fingerprint, bip32::DerivationPath)>,
derivation_path: bip32::DerivationPath,
) -> Result<DescriptorKey<Ctx>, KeyError> {
let xprv = bip32::ExtendedPrivKey::new_master(Network::Bitcoin, &self.as_bytes())?;
let descriptor_key = xprv.add_metadata(source, derivation_path)?;
// here we must choose one network to build the xpub, but since the bip39 standard doesn't
// encode the network the xpub we create is actually valid everywhere. so we override the
// encode the network, the xpub we create is actually valid everywhere. so we override the
// valid networks with `any_network()`.
Ok(descriptor_key.override_valid_networks(any_network()))
}
}
impl<Ctx: ScriptContext> ToDescriptorKey<Ctx> for (MnemonicWithPassphrase, bip32::DerivationPath) {
fn to_descriptor_key(self) -> Result<DescriptorKey<Ctx>, KeyError> {
let (mnemonic, passphrase) = self.0;
impl<Ctx: ScriptContext> DerivableKey<Ctx> for MnemonicWithPassphrase {
fn add_metadata(
self,
source: Option<(bip32::Fingerprint, bip32::DerivationPath)>,
derivation_path: bip32::DerivationPath,
) -> Result<DescriptorKey<Ctx>, KeyError> {
let (mnemonic, passphrase) = self;
let seed = Seed::new(&mnemonic, passphrase.as_deref().unwrap_or(""));
(seed, self.1).to_descriptor_key()
seed.add_metadata(source, derivation_path)
}
}
impl<Ctx: ScriptContext> ToDescriptorKey<Ctx> for (Mnemonic, bip32::DerivationPath) {
fn to_descriptor_key(self) -> Result<DescriptorKey<Ctx>, KeyError> {
((self.0, None), self.1).to_descriptor_key()
impl<Ctx: ScriptContext> DerivableKey<Ctx> for Mnemonic {
fn add_metadata(
self,
source: Option<(bip32::Fingerprint, bip32::DerivationPath)>,
derivation_path: bip32::DerivationPath,
) -> Result<DescriptorKey<Ctx>, KeyError> {
(self, None).add_metadata(source, derivation_path)
}
}