+++ /dev/null
-use bitcoin::blockdata::block::BlockHeader;
-use bitcoin::blockdata::transaction::Transaction;
-use bitcoin::blockdata::script::Script;
-use bitcoin::util::hash::Sha256dHash;
-
-use std::sync::{Weak,Mutex};
-
-/// An interface to request notification of certain scripts as they appear the
-/// chain.
-/// Note that all of the functions implemented here *must* be reentrant-safe (obviously - they're
-/// called from inside the library in response to ChainListener events, P2P events, or timer
-/// events).
-pub trait ChainWatchInterface: Sync + Send {
- /// Provides a scriptPubKey which much be watched for.
- fn install_watch_script(&self, script_pub_key: Script);
-
- /// Provides an outpoint which must be watched for, providing any transactions which spend the
- /// given outpoint.
- fn install_watch_outpoint(&self, outpoint: (Sha256dHash, u32));
-
- /// Indicates that a listener needs to see all transactions.
- fn watch_all_txn(&self);
-
- /// Sends a transaction out to (hopefully) be mined
- fn broadcast_transaction(&self, tx: &Transaction);
-
- fn register_listener(&self, listener: Weak<ChainListener>);
- //TODO: unregister
-}
-
-/// A trait indicating a desire to listen for events from the chain
-pub trait ChainListener: Sync + Send {
- /// Notifies a listener that a block was connected.
- /// Note that if a new script/transaction is watched during a block_connected call, the block
- /// *must* be re-scanned with the new script/transaction and block_connected should be called
- /// again with the same header and (at least) the new transactions.
- /// This also means those counting confirmations using block_connected callbacks should watch
- /// for duplicate headers and not count them towards confirmations!
- fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]);
- /// Notifies a listener that a block was disconnected.
- /// Unlike block_connected, this *must* never be called twice for the same disconnect event.
- fn block_disconnected(&self, header: &BlockHeader);
-}
-
-pub enum ConfirmationTarget {
- Background,
- Normal,
- HighPriority,
-}
-
-/// A trait which should be implemented to provide feerate information on a number of time
-/// horizons.
-/// Note that all of the functions implemented here *must* be reentrant-safe (obviously - they're
-/// called from inside the library in response to ChainListener events, P2P events, or timer
-/// events).
-pub trait FeeEstimator: Sync + Send {
- fn get_est_sat_per_vbyte(&self, ConfirmationTarget) -> u64;
-}
-
-/// Utility to capture some common parts of ChainWatchInterface implementors.
-/// Keeping a local copy of this in a ChainWatchInterface implementor is likely useful.
-pub struct ChainWatchInterfaceUtil {
- watched: Mutex<(Vec<Script>, Vec<(Sha256dHash, u32)>, bool)>, //TODO: Something clever to optimize this
- listeners: Mutex<Vec<Weak<ChainListener>>>,
-}
-
-impl ChainWatchInterfaceUtil {
- pub fn new() -> ChainWatchInterfaceUtil {
- ChainWatchInterfaceUtil {
- watched: Mutex::new((Vec::new(), Vec::new(), false)),
- listeners: Mutex::new(Vec::new()),
- }
- }
-
- pub fn install_watch_script(&self, spk: Script) {
- let mut watched = self.watched.lock().unwrap();
- watched.0.push(Script::from(spk));
- }
-
- pub fn install_watch_outpoint(&self, outpoint: (Sha256dHash, u32)) {
- let mut watched = self.watched.lock().unwrap();
- watched.1.push(outpoint);
- }
-
- pub fn watch_all_txn(&self) { //TODO: refcnt this?
- let mut watched = self.watched.lock().unwrap();
- watched.2 = true;
- }
-
- pub fn register_listener(&self, listener: Weak<ChainListener>) {
- let mut vec = self.listeners.lock().unwrap();
- vec.push(listener);
- }
-
- pub fn do_call_block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) {
- let listeners = self.listeners.lock().unwrap().clone();
- for listener in listeners.iter() {
- match listener.upgrade() {
- Some(arc) => arc.block_connected(header, height, txn_matched, indexes_of_txn_matched),
- None => ()
- }
- }
- }
-
- pub fn do_call_block_disconnected(&self, header: &BlockHeader) {
- let listeners = self.listeners.lock().unwrap().clone();
- for listener in listeners.iter() {
- match listener.upgrade() {
- Some(arc) => arc.block_disconnected(header),
- None => ()
- }
- }
- }
-
- /// Checks if a given transaction matches the current filter
- pub fn does_match_tx(&self, tx: &Transaction) -> bool {
- let watched = self.watched.lock().unwrap();
- if watched.2 {
- return true;
- }
- for out in tx.output.iter() {
- for script in watched.0.iter() {
- if script[..] == out.script_pubkey[..] {
- return true;
- }
- }
- }
- for input in tx.input.iter() {
- for outpoint in watched.1.iter() {
- let &(outpoint_hash, outpoint_index) = outpoint;
- if outpoint_hash == input.prev_hash && outpoint_index == input.prev_index {
- return true;
- }
- }
- }
- false
- }
-}
projects / rust-lightning / blobdiff