Alekos Filini [Thu, 12 May 2022 15:28:41 +0000 (17:28 +0200)]
Attach a context to our software signers
This allows the signer to know the signing context precisely without
relying on heuristics on the psbt fields.
Due to the context being static, we still have to look at the PSBT when
producing taproot signatures to determine the set of leaf hashes that
the key can sign for.
This PR fixes #591 by:
1. Add sqlite `MIGRATIONS` statements to remove duplicate utxos and add unique utxos index on txid and vout.
2. Do an upsert (if insert fails update) instead of an insert in `set_utxo()`.
3. Update database::test::test_utxo to also verify `set_utxo()` doesn't insert duplicate utxos.
### Notes to the reviewers
I verified the updated `test_utxo` fails as expected before my fix and passes after the fix. I tested the new migrations using the below `bdk-cli` command and a manually updated sqlite db with duplicate utxos.
```shell
cargo run --no-default-features --features cli,sqlite-db,esplora-ureq -- wallet -w test1 --descriptor "wpkh(tpubEBr4i6yk5nf5DAaJpsi9N2pPYBeJ7fZ5Z9rmN4977iYLCGco1VyjB9tvvuvYtfZzjD5A8igzgw3HeWeeKFmanHYqksqZXYXGsw5zjnj7KM9/*)" sync
```
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ACKs for top commit:
danielabrozzoni:
utACK 35feb107ed5969720ce54a6aa76b7b2176f6c7c1 - Code looks good, but I didn't do any local test to see if the db gets wiped
Also explicitly match all the individual variants to ensure a similar problem
doesn't happen again.
Fixes #609
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### Description
unpinning dependency tokio to just 1
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Upgrade all our dependencies to work with the new release of rust-bitcoin
### Notes to the reviewers
The commits in this pr were originally part of #593
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Add three new traits:
- `StatelessBlockchain` is used to tag `Blockchain`s that don't have any wallet-specic state, i.e. they can be used as-is to sync multiple wallets.
- `StatefulBlockchain` is the opposite of `StatelessBlockchain`: it provides a method to "clone" a `Blockchain` with an updated internal state (a new wallet checksum and, optionally, a different number of blocks to skip from genesis). Potentially this also allows reusing the underlying connection on `Blockchain` types that support it.
- `MultiBlockchain` is a generalization of this concept: it's implemented automatically for every type that implements `StatefulBlockchain` and for every `Arc<T>` where `T` is a `StatelessBlockchain`. This allows a piece of code that deals with multiple sub-wallets to just get a `&B: MultiBlockchain` without having to deal with stateful and statless blockchains individually.
These new traits have been implemented for Electrum, Esplora and RPC (the first two being stateless and the latter stateful). It hasn't been implemented on the CBF blockchain, because I don't think it would work in its current form (it throws away old block filters, so it's hard to go back and rescan).
This is the first step for #549, as BIP47 needs to sync many different descriptors internally.
It's also very useful for #486.
### Notes to the reviewers
This is still a draft because:
- I'm still wondering if these traits should "inherit" from `Blockchain` instead of the less-restrictive `WalletSync` + `GetHeight` which is the bare minimum to sync a wallet
- I need to write tests, at least for rpc which is stateful
- I need to add examples
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### Description
This change needs to be made for this example to compile correctly.
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Alekos Filini [Tue, 15 Mar 2022 09:48:00 +0000 (10:48 +0100)]
[blockchain] Add traits to reuse `Blockchain`s across multiple wallets
Add two new traits:
- `StatelessBlockchain` is used to tag `Blockchain`s that don't have any
wallet-specic state, i.e. they can be used as-is to sync multiple wallets.
- `BlockchainFactory` is a trait for objects that can build multiple
blockchains for different descriptors. It's implemented automatically
for every `Arc<T>` where `T` is a `StatelessBlockchain`. This allows a
piece of code that deals with multiple sub-wallets to just get a
`&B: BlockchainFactory` to sync all of them.
These new traits have been implemented for Electrum, Esplora and RPC
(the first two being stateless and the latter having a dedicated
`RpcBlockchainFactory` struct). It hasn't been implemented on the CBF
blockchain, because I don't think it would work in its current form
(it throws away old block filters, so it's hard to go back and rescan).
This is the first step for #549, as BIP47 needs to sync many different
descriptors internally.
Change testing function `wallet::get_funded_wallet` to return `Wallet<AnyDatabase>` instead of `Wallet<MemoryDatabase>`. This will allow us to use this function for testing `bdk-ffi` which only works with `Wallet<AnyDatabase>`.
### Notes to the reviewers
This is required to complete https://github.com/bitcoindevkit/bdk-ffi/pull/148.
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### Description
This PR fixes a small typo in the documentation for the `allow_shrinking()` method on the `TxBuilder`.
### Notes to the reviewers
The sentence
```txt
Explicitly tells the wallet that it is allowed to reduce the fee of the output matching this `script_pubkey` in order to bump the transaction fee. Without specifying this the wallet will attempt to find a change output to shrink instead.
```
was changed for
```txt
Explicitly tells the wallet that it is allowed to reduce the amount of the output matching this `script_pubkey` in order to bump the transaction fee. Without specifying this the wallet will attempt to find a change output to shrink instead.
```
To reflect the fact that it's the _amount_ of the output that is being reduced in order to leave more for the fees.
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Following the discussion in #331, bump the MSRV to `1.56`. We already have other PRs bumping it to at least `1.51` (#593), but I'm felling like we are always lagging behind and our CI breaks regularly. As @LLFourn suggested, this PR makes a relatively large bump, hoping this buys us enough time to finish splitting up BDK, which will allow us to have a lower MSRV for the "core" crate.
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### Description
This PR is to add `OldestFirstCoinSelection`. See this issue for detail https://github.com/bitcoindevkit/bdk/issues/120
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### Notes to the reviewers
Apologize in advance if the quality of this PR is too low.(I am newbie in both bitcoin wallet and rust).
While this PR seemed very straight-forward to me in the first glance, it's actually a bit more complicated than I thought as it involves calling DB get the blockheight before sorting it.
The current implementation should be pretty naive but I would like to get some opinion to see if I am heading to a right direction first before working on optimizations like
~~1. Avoiding calling DB for optional_utxos if if the amount from required_utxos are already enough.~~ Probably not worth to do such optimization to keep code simpler?
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### Description
Expose `bip39::Error` (fixes #581 )
### Notes to the reviewers
I am aware that the `bip39` module plans to be rewritten (as per #561 ), however this seems like a rather straightforward and quick change that may be useful in the short/mid term.
This branch also includes the following changes which are not yet in the `master` branch:
- Rename `WalletExport` to `FullyNodedExport`, deprecate the former.
- Bump `miniscript` dependency version to `^6.1`.
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The `WalletExport` type can still be used as an alias to `FullyNodedExport` but it has been marked as deprecated and will be removed in the next release.
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export: Rename `WalletExport` to `FullyNodedExport`
The `WalletExport` type can still be used as an alias to
`FullyNodedExport` but it has been marked as deprecated and will be
removed in the next release.
I recently looked at the `rpcwallet` example and immediately thought the key generation part was very confusing. I made a few little changes to our traits and now I believe it's much better.
I'm copying the next few paragraphs from the first commit in this PR which explains why it's better not to extract the key from the `GeneratedKey` wrapper:
> This lets us use a tuple of (generated mnemonic, optional passphrase) as a `DerivableKey` directly, without extracting the inner mnemonic from the `GeneratedKey` wrapper. For BIP39 keys specifically it doesn't make much difference because the mnemonic format doesn't encode the network, but in general this is not the case and having a consistent API will make it harder for people to make mistakes.
> To explain why we should not extract the key: some key formats (like BIP32 extended keys) are network-specific, meaning that if somebody tries to use a Testnet key on a Mainnet BDK wallet, it won't work.
> However, when we generate a new key we would like to be able to use that key on any network, but we need to set some kind of placeholder for the `network` field in the structure. This is why (or at least one of the reasons why) we wrap the key in the `GeneratedKey` struct: we keep track of the "valid_networks" separately, which means that even if we set our BIP32 xprv to be a "Mainnet" key, once we go try creating a wallet with that key BDK is smart enough to understand that `GeneratedKey`s have their own separate set of valid networks and it will use that set to validate whether the key can be used in the wallet or not.
### Notes to the reviewers
I'm adding this to the `0.18` milestone even if the feature freeze is today. I don't think we should wait for this PR to start the release branch, but since it's just a minor addition to our traits I believe we could merge this afterwards to the release branch if we manage to get it reviewed and ready within the next week.
Otherwise it'll just wait for `0.19`, it's not a big deal.
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[keys] Implement `DerivableKey<Ctx>` for `(GeneratedKey<Mnemonic, Ctx>, Option<String>)`
This lets us use a tuple of (generated mnemonic, optional passphrase) as
a `DerivableKey` directly, without extracting the inner mnemonic from the
`GeneratedKey` wrapper. For BIP39 keys specifically it doesn't make much
difference because the mnemonic format doesn't encode the network, but in
general this is not the case and having a consistent API will make it
harder for people to make mistakes.
To explain why we should not extract the key: some key formats (like
BIP32 extended keys) are network-specific, meaning that if somebody
tries to use a Testnet key on a Mainnet BDK wallet, it won't work.
However, when we generate a new key we would like to be able to use that
key on any network, but we need to set some kind of placeholder for the
`network` field in the structure. This is why (or at least one of the
reasons why) we wrap the key in the `GeneratedKey` struct: we keep track
of the "valid_networks" separately, which means that even if we set our
BIP32 xprv to be a "Mainnet" key, once we go try creating a wallet with
that key BDK is smart enough to understand that `GeneratedKey`s have
their own separate set of valid networks and it will use that set to
validate whether the key can be used in the wallet or not.
The Database::flush() function is only needed for the sled database on mobile, instead for mobile use the sqlite database.
### Notes to the reviewers
This PR is in preparation for removing the Database::flush() function. See https://github.com/bitcoindevkit/bdk/pull/575#issuecomment-1082916667.
After the `release/0.18.0` feature freeze branch is created then #575 should be merged.
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### Description
Speeds up esplora ureq syncing. Taken from https://github.com/bitcoindevkit/bdk/pull/560
The current sync just creates a map of scripts to joinhandles which doesn't yet spawn the sync threads due to lazy evaluation. In the following `handles.map()`, the thread handles are *sequentially* evaluated and joined. With the fix, the handles are collected so that the threads spawn in parallel, and then joined
### Notes to the reviewers
I had to add a `#[allow(clippy::needless_collect)]` so that it wouldn't complain about collecting and then iterating. (Perhaps clippy is partially responsible for this issue!)
Tested sync performance by doing a fresh sync on an existing [gun](https://gun.fun) wallet.
```
---- Before fix ---
real0m13.121s
real0m13.367s
real0m13.211s
---- After fix ----
real0m5.516s
real0m5.251s
real0m5.594s
```
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### Description
Expose more getters and internal utilities for people who need to work with descriptors.
A good example of how this can be leveraged is in the second commit, which refactors the wallet export functionality to use the new public APIs rather than using members on `Wallet` directly.
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Resolves #541.
- Updates `AddressInfo` struct to include `keychainKind`
- Updates the related `get_address` functions to pass in this field
- Updates corresponding tests
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This PR fixes the hierarchy of headers on the lib.rs docs. I noticed it as I was reading through the docs. The new hierarchy is the following:
- About (h1)
- A tour of BDK (h1)
- Examples (h1)
- Sync the balance of a descriptor (h2)
- Generate a few addresses (h2)
- Create a transaction (h2)
- Sign a transaction (h2)
- Feature flags (h1)
- Internal features (h1)
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As mentioned in https://github.com/bitcoindevkit/bitcoindevkit.org/issues/83#issuecomment-1005190174 it would be helpful
to have wallet creation example code in the `example` directory.
This is an attempt to create the most simplistic bdk wallet with a RPC backend and demonstrate receiving, creating, signing
and broadcasting transaction.
The code is a refinement of the RPC tutorial https://bitcoindevkit.org/blog/bitcoin-core-rpc-demo/ with more elaborate doc comments.
### Notes to the reviewers
To automate the background RPC process `electrsd` is used which is already a `dev-dependency` of bdk.
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### Description
PR RCasatta/electrsd#33 has been merged and the new changes released as part of `v0.15.0`: the PR allows setting an env variable (`ELECTRSD_EXE`) to use a custom electrsd binary, which can be useful when the one that is downloaded automatically doesn't work for whatever reason.
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### Description
A `is_spent` field is added to LocalUtxo; when a txo is spent we set
this field to true instead of deleting the entire utxo from the
database.
This allows us to create txs double-spending txs already in blockchain.
Listunspent won't return spent in mempool utxos, effectively excluding them from the coin selection and balance calculation
Fixes #414
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A `is_spent` field is added to LocalUtxo; when a txo is spent we set
this field to true instead of deleting the entire utxo from the
database.
This allows us to create txs double-spending txs already in blockchain.
Listunspent won't return spent utxos, effectively excluding them from the
coin selection and balance calculation
While trying to finish #490 I thought that it'd be better to try the idea of getting rid of a lot of the async macros and just having tow different traits for sync and async stuff. While trying to do that I felt that this needed to be done first.
The goal of this change is to decouple the wallet from the blockchain trait. A wallet is something that keeps track of UTXOs and transactions (and can sign things). The only reason it should need to talk to the blockchain is if doing a `sync`. So we remove all superfluous calls to the blockchain and precisely define the requirements for the blockchain to be used to sync with two new traits: `WalletSync` and `GetHeight`.
1. Stop requesting height when wallet is created
2. `new_offline` is just `new` now.
3. a `WalletSync + GetHeight` is now the first argument to `sync`.
4. `SyncOptions` replaces the existing options to `sync` and allows for less friction when making breaking changes in the fuutre (no more noop_progress!).
5. We `Box` the `Progress` now to avoid type parameters
6. broadcast has been removed from `Wallet`. You just use the blockchain directly to broadcast now.
### Notes to the reviewers
This needs #502 before it can be merged but can reviewed now.
Be on the look up for stale documentation from this change.
Our doc build looks broken because of ureq or something.
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Currently, the only way to ensure that a wallet's internal database has addresses loaded and cached is through `Wallet::sync`: that function generates and caches up to a number of addresses if they aren't already in the database, and then uses the wallet's blockchain client to sync those addresses. If you are using an offline wallet, there is no mechanism to ensure that the database has addresses loaded. This is a problem for usecases like an offline wallet being used as a multisig signer and wanting to validate change addresses as `Wallet::is_mine` will only work properly if the owned-address is loaded in the database.
This PR takes the address caching functionality out of `Wallet::sync` and puts it in a new public method that is available to offline wallets. `Wallet::sync` uses this method internally.
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There are good reasons for applications to need to get internal
addresses too. For example creating a transactions that splits an output
into several smaller ones.
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LLFourn [Thu, 24 Feb 2022 09:32:47 +0000 (20:32 +1100)]
[rpc] Filter out unrelated transactions
For some reason while doing the "remove blockchain from wallet PR" I
changed the tests around in what I thought was a benign way. But it
meant (apparently) that both parties "test_sync_double_receive" were
using the same "blockchain". This meant that when the blockchain was RPC
they both imported their addresses to it and got each other's results
when syncing. This bugged out the sync and this commit fixes that.
LLFourn [Wed, 26 Jan 2022 04:17:48 +0000 (15:17 +1100)]
Remove Blockchain from wallet
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.
LLFourn [Thu, 19 Aug 2021 09:57:35 +0000 (19:57 +1000)]
Add API for internal addresses
There are good reasons for applications to need to get internal
addresses too. For example creating a transactions that splits an output
into several smaller ones.
<!-- You can erase any parts of this template not applicable to your Pull Request. -->
### Description
As discussed in https://github.com/bitcoindevkit/bdk/issues/498 and also in team call,
- default verification from wallet sync is removed
- `verify_tx` refactored as an wallet API
- in `sync` verification added for electrum and esplora backends, gated by `verify` flag.
- `verify` flag is removed from `TransactionDetails`.
### Notes to the reviewers
I haven't looked into `comapct_filters` to see how verification can fit there, but that will probably be required in future.
### Checklists
#### All Submissions:
* [x] I've signed all my commits
* [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
* [x] I ran `cargo fmt` and `cargo clippy` before committing
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