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Implement linked-list LocalChain and update chain-src crates/examples

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This commit changes the `LocalChain` implementation to have blocks
stored as a linked-list. This allows the data-src thread to hold a
shared ref to a single checkpoint and have access to the whole history
of checkpoints without cloning or keeping a lock on `LocalChain`.

The APIs of `bdk::Wallet`, `esplora` and `electrum` are also updated to
reflect these changes. Note that the `esplora` crate is rewritten to
anchor txs in the confirmation block (using the esplora API's tx status
block_hash). This guarantees 100% consistency between anchor blocks and
their transactions (instead of anchoring txs to the latest tip).
`ExploraExt` now has separate methods for updating the `TxGraph` and
`LocalChain`.

A new method `TxGraph::missing_blocks` is introduced for finding
"floating anchors" of a `TxGraph` update (given a chain).

Additional changes:

* `test_local_chain.rs` is refactored to make test cases easier to
  write. Additional tests are also added.
* Examples are updated.
* Fix `tempfile` dev dependency of `bdk_file_store` to work with MSRV

Co-authored-by: LLFourn <lloyd.fourn@gmail.com>
This commit is contained in:
志宇
2023-07-19 17:42:52 +08:00
parent f4d2a76661
commit eabeb6ccb1
18 changed files with 1551 additions and 904 deletions
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15
crates/electrum/src/lib.rs
View File

@@ -15,21 +15,14 @@
//!
//! Refer to [`bdk_electrum_example`] for a complete example.
//!
//! [`ElectrumClient::scan`]: ElectrumClient::scan
//! [`ElectrumClient::scan`]: electrum_client::ElectrumClient::scan
//! [`missing_full_txs`]: ElectrumUpdate::missing_full_txs
//! [`batch_transaction_get`]: ElectrumApi::batch_transaction_get
//! [`batch_transaction_get`]: electrum_client::ElectrumApi::batch_transaction_get
//! [`bdk_electrum_example`]: https://github.com/LLFourn/bdk_core_staging/tree/master/bdk_electrum_example
use bdk_chain::bitcoin::BlockHash;
use electrum_client::{Client, ElectrumApi, Error};
#![warn(missing_docs)]
mod electrum_ext;
pub use bdk_chain;
pub use electrum_client;
pub use electrum_ext::*;
fn get_tip(client: &Client) -> Result<(u32, BlockHash), Error> {
// TODO: unsubscribe when added to the client, or is there a better call to use here?
client
.block_headers_subscribe()
.map(|data| (data.height as u32, data.header.block_hash()))
}