326bfe82a8
Although somewhat convenient to have, coupling the Wallet with the blockchain trait causes development friction and complexity. What if sometimes the wallet is "offline" (no access to the blockchain) but sometimes its online? The only thing the Wallet needs the blockchain for is to sync. But not all applications will even use the sync method and the sync method doesn't require the full blockchain functionality. So we instead pass the blockchain in when we want to sync. - To further reduce the coupling with blockchain I removed the get_height call from `new` and just use the height of the last sync in the database. - I split up the blockchain trait a bit into subtraits.
61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
// Bitcoin Dev Kit
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// Written in 2020 by Alekos Filini <alekos.filini@gmail.com>
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//
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// Copyright (c) 2020-2021 Bitcoin Dev Kit Developers
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//
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// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
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// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
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// You may not use this file except in accordance with one or both of these
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// licenses.
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use std::sync::Arc;
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use bdk::bitcoin;
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use bdk::database::MemoryDatabase;
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use bdk::descriptor::HdKeyPaths;
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use bdk::wallet::address_validator::{AddressValidator, AddressValidatorError};
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use bdk::KeychainKind;
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use bdk::Wallet;
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use bdk::wallet::AddressIndex::New;
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use bitcoin::hashes::hex::FromHex;
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use bitcoin::util::bip32::Fingerprint;
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use bitcoin::{Network, Script};
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#[derive(Debug)]
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struct DummyValidator;
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impl AddressValidator for DummyValidator {
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fn validate(
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&self,
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keychain: KeychainKind,
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hd_keypaths: &HdKeyPaths,
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script: &Script,
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) -> Result<(), AddressValidatorError> {
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let (_, path) = hd_keypaths
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.values()
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.find(|(fing, _)| fing == &Fingerprint::from_hex("bc123c3e").unwrap())
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.ok_or(AddressValidatorError::InvalidScript)?;
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println!(
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"Validating `{:?}` {} address, script: {}",
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keychain, path, script
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);
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Ok(())
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}
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}
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fn main() -> Result<(), bdk::Error> {
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let descriptor = "sh(and_v(v:pk(tpubDDpWvmUrPZrhSPmUzCMBHffvC3HyMAPnWDSAQNBTnj1iZeJa7BZQEttFiP4DS4GCcXQHezdXhn86Hj6LHX5EDstXPWrMaSneRWM8yUf6NFd/*),after(630000)))";
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let mut wallet = Wallet::new(descriptor, None, Network::Regtest, MemoryDatabase::new())?;
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wallet.add_address_validator(Arc::new(DummyValidator));
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wallet.get_address(New)?;
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wallet.get_address(New)?;
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wallet.get_address(New)?;
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Ok(())
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}
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