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47 lines
1.5 KiB
Rust
47 lines
1.5 KiB
Rust
// Copyright 2018 The Grin Developers
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Wallet key management functions
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use keychain::{Identifier, Keychain};
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use libwallet::error::Error;
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use libwallet::types::{WalletBackend, WalletClient};
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/// Get next available key in the wallet
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pub fn next_available_key<T: ?Sized, C, K>(wallet: &mut T) -> Result<(Identifier, u32), Error>
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where
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T: WalletBackend<C, K>,
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C: WalletClient,
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K: Keychain,
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{
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let root_key_id = wallet.keychain().root_key_id();
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let derivation = wallet.next_child(root_key_id.clone())?;
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let key_id = wallet.keychain().derive_key_id(derivation)?;
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Ok((key_id, derivation))
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}
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/// Retrieve an existing key from a wallet
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pub fn retrieve_existing_key<T: ?Sized, C, K>(
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wallet: &T,
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key_id: Identifier,
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) -> Result<(Identifier, u32), Error>
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where
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T: WalletBackend<C, K>,
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C: WalletClient,
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K: Keychain,
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{
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let existing = wallet.get(&key_id)?;
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let key_id = existing.key_id.clone();
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let derivation = existing.n_child;
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Ok((key_id, derivation))
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}
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