From 2da49530e7dcfff877fa36590334bcdf312d5874 Mon Sep 17 00:00:00 2001
From: Jeffrey Czyz <jkczyz@gmail.com>
Date: Tue, 14 Jun 2022 18:05:25 -0500
Subject: [PATCH] Look-up functions for ReadOnlyNetworkGraph

ReadOnlyNetworkGraph uses BTreeMap to store its nodes and channels, but
these data structures are not supported by C bindings. Expose look-up
functions on these maps in lieu of such support.
---
 lightning/src/routing/gossip.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lightning/src/routing/gossip.rs b/lightning/src/routing/gossip.rs
index f404e77b2b..1a030e9ddd 100644
--- a/lightning/src/routing/gossip.rs
+++ b/lightning/src/routing/gossip.rs
@@ -1602,6 +1602,11 @@ impl ReadOnlyNetworkGraph<'_> {
 		&*self.channels
 	}
 
+	/// Returns information on a channel with the given id.
+	pub fn channel(&self, short_channel_id: u64) -> Option<&ChannelInfo> {
+		self.channels.get(&short_channel_id)
+	}
+
 	/// Returns all known nodes' public keys along with announced node info.
 	///
 	/// (C-not exported) because we have no mapping for `BTreeMap`s
@@ -1609,6 +1614,11 @@ impl ReadOnlyNetworkGraph<'_> {
 		&*self.nodes
 	}
 
+	/// Returns information on a node with the given id.
+	pub fn node(&self, node_id: &NodeId) -> Option<&NodeInfo> {
+		self.nodes.get(node_id)
+	}
+
 	/// Get network addresses by node id.
 	/// Returns None if the requested node is completely unknown,
 	/// or if node announcement for the node was never received.