Add the `OutPoint` type for the `ChannelMonitor`'s funding_txo field.

[rust-lightning] / src / chain / transaction.rs

diff --git a/src/chain/transaction.rs b/src/chain/transaction.rs
new file mode 100644 (file)
index 0000000..00728b4
--- /dev/null
+++ b/src/chain/transaction.rs
@@ -0,0 +1,24 @@
+use bitcoin::util::hash::Sha256dHash;
+use bitcoin::util::uint::Uint256;
+
+/// A reference to a transaction output.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+pub struct OutPoint {
+       /// The referenced transaction's txid.
+       pub txid: Sha256dHash,
+       /// The index of the referenced output in its transaction's vout.
+       pub index: u16,
+}
+
+impl OutPoint {
+       /// Creates a new `OutPoint` from the txid an the index.
+       pub fn new(txid: Sha256dHash, index: u16) -> OutPoint {
+               OutPoint { txid, index }
+       }
+
+    /// Convert an `OutPoint` to a lightning channel id.
+    pub fn to_channel_id(&self) -> Uint256 {
+        // TODO: or le?
+        self.txid.into_be() ^ Uint256::from_u64(self.index as u64).unwrap()
+    }
+}