Expose ReadOnlyNetworkGraph::get_addresses to C by cloning result
[rust-lightning] / lightning / src / util / events.rs
index c8cedeb14cd9ac8cfaebb070733dcc130d5462ba..37c64364b1817bf89e4477ce650a70f52ba0b938 100644 (file)
@@ -23,13 +23,15 @@ use util::ser::{BigSize, FixedLengthReader, Writeable, Writer, MaybeReadable, Re
 use routing::router::RouteHop;
 
 use bitcoin::blockdata::script::Script;
-
+use bitcoin::hashes::Hash;
+use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::secp256k1::key::PublicKey;
 
 use io;
 use prelude::*;
 use core::time::Duration;
 use core::ops::Deref;
+use bitcoin::Transaction;
 
 /// Some information provided on receipt of payment depends on whether the payment received is a
 /// spontaneous payment or a "conventional" lightning payment that's paying an invoice.
@@ -148,21 +150,20 @@ pub enum Event {
                user_channel_id: u64,
        },
        /// Indicates we've received money! Just gotta dig out that payment preimage and feed it to
-       /// ChannelManager::claim_funds to get it....
-       /// Note that if the preimage is not known or the amount paid is incorrect, you should call
-       /// ChannelManager::fail_htlc_backwards to free up resources for this HTLC and avoid
+       /// [`ChannelManager::claim_funds`] to get it....
+       /// Note that if the preimage is not known, you should call
+       /// [`ChannelManager::fail_htlc_backwards`] to free up resources for this HTLC and avoid
        /// network congestion.
-       /// The amount paid should be considered 'incorrect' when it is less than or more than twice
-       /// the amount expected.
-       /// If you fail to call either ChannelManager::claim_funds or
-       /// ChannelManager::fail_htlc_backwards within the HTLC's timeout, the HTLC will be
+       /// If you fail to call either [`ChannelManager::claim_funds`] or
+       /// [`ChannelManager::fail_htlc_backwards`] within the HTLC's timeout, the HTLC will be
        /// automatically failed.
+       ///
+       /// [`ChannelManager::claim_funds`]: crate::ln::channelmanager::ChannelManager::claim_funds
+       /// [`ChannelManager::fail_htlc_backwards`]: crate::ln::channelmanager::ChannelManager::fail_htlc_backwards
        PaymentReceived {
                /// The hash for which the preimage should be handed to the ChannelManager.
                payment_hash: PaymentHash,
-               /// The value, in thousandths of a satoshi, that this payment is for. Note that you must
-               /// compare this to the expected value before accepting the payment (as otherwise you are
-               /// providing proof-of-payment for less than the value you expected!).
+               /// The value, in thousandths of a satoshi, that this payment is for.
                amt: u64,
                /// Information for claiming this received payment, based on whether the purpose of the
                /// payment is to pay an invoice or to send a spontaneous payment.
@@ -178,6 +179,10 @@ pub enum Event {
                /// Note that this serves as a payment receipt, if you wish to have such a thing, you must
                /// store it somehow!
                payment_preimage: PaymentPreimage,
+               /// The hash which was given to [`ChannelManager::send_payment`].
+               ///
+               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
+               payment_hash: PaymentHash,
        },
        /// Indicates an outbound payment we made failed. Probably some intermediary node dropped
        /// something. You may wish to retry with a different route.
@@ -254,6 +259,14 @@ pub enum Event {
                channel_id: [u8; 32],
                /// The reason the channel was closed.
                reason: ClosureReason
+       },
+       /// Used to indicate to the user that they can abandon the funding transaction and recycle the
+       /// inputs for another purpose.
+       DiscardFunding {
+               /// The channel_id of the channel which has been closed.
+               channel_id: [u8; 32],
+               /// The full transaction received from the user
+               transaction: Transaction
        }
 }
 
@@ -288,10 +301,11 @@ impl Writeable for Event {
                                        (8, payment_preimage, option),
                                });
                        },
-                       &Event::PaymentSent { ref payment_preimage } => {
+                       &Event::PaymentSent { ref payment_preimage, ref payment_hash} => {
                                2u8.write(writer)?;
                                write_tlv_fields!(writer, {
                                        (0, payment_preimage, required),
+                                       (1, payment_hash, required),
                                });
                        },
                        &Event::PaymentPathFailed { ref payment_hash, ref rejected_by_dest, ref network_update,
@@ -339,6 +353,13 @@ impl Writeable for Event {
                                        (2, reason, required)
                                });
                        },
+                       &Event::DiscardFunding { ref channel_id, ref transaction } => {
+                               11u8.write(writer)?;
+                               write_tlv_fields!(writer, {
+                                       (0, channel_id, required),
+                                       (2, transaction, required)
+                               })
+                       },
                        // Note that, going forward, all new events must only write data inside of
                        // `write_tlv_fields`. Versions 0.0.101+ will ignore odd-numbered events that write
                        // data via `write_tlv_fields`.
@@ -388,11 +409,17 @@ impl MaybeReadable for Event {
                        2u8 => {
                                let f = || {
                                        let mut payment_preimage = PaymentPreimage([0; 32]);
+                                       let mut payment_hash = None;
                                        read_tlv_fields!(reader, {
                                                (0, payment_preimage, required),
+                                               (1, payment_hash, option),
                                        });
+                                       if payment_hash.is_none() {
+                                               payment_hash = Some(PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner()));
+                                       }
                                        Ok(Some(Event::PaymentSent {
                                                payment_preimage,
+                                               payment_hash: payment_hash.unwrap(),
                                        }))
                                };
                                f()
@@ -462,6 +489,15 @@ impl MaybeReadable for Event {
                                if reason.is_none() { return Ok(None); }
                                Ok(Some(Event::ChannelClosed { channel_id, reason: reason.unwrap() }))
                        },
+                       11u8 => {
+                               let mut channel_id = [0; 32];
+                               let mut transaction = Transaction{ version: 2, lock_time: 0, input: Vec::new(), output: Vec::new() };
+                               read_tlv_fields!(reader, {
+                                       (0, channel_id, required),
+                                       (2, transaction, required),
+                               });
+                               Ok(Some(Event::DiscardFunding { channel_id, transaction } ))
+                       },
                        // Versions prior to 0.0.100 did not ignore odd types, instead returning InvalidValue.
                        // Version 0.0.100 failed to properly ignore odd types, possibly resulting in corrupt
                        // reads.