//! Structs and traits which allow other parts of rust-lightning to interact with the blockchain.
use bitcoin::blockdata::block::{Block, BlockHeader};
+use bitcoin::blockdata::constants::genesis_block;
use bitcoin::blockdata::script::Script;
use bitcoin::blockdata::transaction::{Transaction, TxOut};
use bitcoin::hash_types::{BlockHash, Txid};
+use bitcoin::network::constants::Network;
use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateErr, MonitorEvent};
use chain::keysinterface::Sign;
use chain::transaction::{OutPoint, TransactionData};
+use prelude::*;
+
pub mod chaininterface;
pub mod chainmonitor;
pub mod channelmonitor;
pub mod transaction;
pub mod keysinterface;
+pub(crate) mod onchaintx;
+pub(crate) mod package;
+
+/// The best known block as identified by its hash and height.
+#[derive(Clone, Copy, PartialEq)]
+pub struct BestBlock {
+ block_hash: BlockHash,
+ height: u32,
+}
+
+impl BestBlock {
+ /// Constructs a `BestBlock` that represents the genesis block at height 0 of the given
+ /// network.
+ pub fn from_genesis(network: Network) -> Self {
+ BestBlock {
+ block_hash: genesis_block(network).header.block_hash(),
+ height: 0,
+ }
+ }
+
+ /// Returns a `BestBlock` as identified by the given block hash and height.
+ pub fn new(block_hash: BlockHash, height: u32) -> Self {
+ BestBlock { block_hash, height }
+ }
+
+ /// Returns the best block hash.
+ pub fn block_hash(&self) -> BlockHash { self.block_hash }
+
+ /// Returns the best block height.
+ pub fn height(&self) -> u32 { self.height }
+}
/// An error when accessing the chain via [`Access`].
#[derive(Clone)]
/// The `Access` trait defines behavior for accessing chain data and state, such as blocks and
/// UTXOs.
-pub trait Access: Send + Sync {
+pub trait Access {
/// Returns the transaction output of a funding transaction encoded by [`short_channel_id`].
/// Returns an error if `genesis_hash` is for a different chain or if such a transaction output
/// is unknown.
/// [`ChannelMonitor`]: channelmonitor::ChannelMonitor
/// [`ChannelMonitorUpdateErr`]: channelmonitor::ChannelMonitorUpdateErr
/// [`PermanentFailure`]: channelmonitor::ChannelMonitorUpdateErr::PermanentFailure
-pub trait Watch<ChannelSigner: Sign>: Send + Sync {
+pub trait Watch<ChannelSigner: Sign> {
/// Watches a channel identified by `funding_txo` using `monitor`.
///
/// Implementations are responsible for watching the chain for the funding transaction along
/// [`TemporaryFailure`]: channelmonitor::ChannelMonitorUpdateErr::TemporaryFailure
/// [BIP 157]: https://github.com/bitcoin/bips/blob/master/bip-0157.mediawiki
/// [BIP 158]: https://github.com/bitcoin/bips/blob/master/bip-0158.mediawiki
-pub trait Filter: Send + Sync {
+pub trait Filter {
/// Registers interest in a transaction with `txid` and having an output with `script_pubkey` as
/// a spending condition.
fn register_tx(&self, txid: &Txid, script_pubkey: &Script);
///
/// [`ChannelMonitor`]: channelmonitor::ChannelMonitor
/// [`ChannelMonitor::block_connected`]: channelmonitor::ChannelMonitor::block_connected
+#[derive(Clone, PartialEq, Hash)]
pub struct WatchedOutput {
/// First block where the transaction output may have been spent.
pub block_hash: Option<BlockHash>,
pub script_pubkey: Script,
}
-impl<T: Listen> Listen for std::ops::Deref<Target = T> {
+impl<T: Listen> Listen for core::ops::Deref<Target = T> {
fn block_connected(&self, block: &Block, height: u32) {
(**self).block_connected(block, height);
}
}
}
-impl<T: std::ops::Deref, U: std::ops::Deref> Listen for (T, U)
+impl<T: core::ops::Deref, U: core::ops::Deref> Listen for (T, U)
where
T::Target: Listen,
U::Target: Listen,