Add NetworkGraph persistence

[rust-lightning] / lightning-persister / src / lib.rs

diff --git a/lightning-persister/src/lib.rs b/lightning-persister/src/lib.rs
index ef914700a16302c0e5dacad1414d3e0e8c1eb03c..da64cb375da11d71f517bcd31c47c5686796b088 100644 (file)
--- a/lightning-persister/src/lib.rs
+++ b/lightning-persister/src/lib.rs
@@ -16,6 +16,7 @@ extern crate libc;
 
 use bitcoin::hash_types::{BlockHash, Txid};
 use bitcoin::hashes::hex::{FromHex, ToHex};
+use lightning::routing::network_graph::NetworkGraph;
 use crate::util::DiskWriteable;
 use lightning::chain;
 use lightning::chain::chaininterface::{BroadcasterInterface, FeeEstimator};
@@ -66,6 +67,12 @@ where
        }
 }
 
+impl DiskWriteable for NetworkGraph {
+       fn write_to_file(&self, writer: &mut fs::File) -> Result<(), std::io::Error> {
+               self.write(writer)
+       }
+}
+
 impl FilesystemPersister {
        /// Initialize a new FilesystemPersister and set the path to the individual channels'
        /// files.
@@ -103,6 +110,13 @@ impl FilesystemPersister {
                util::write_to_file(path, "manager".to_string(), manager)
        }
 
+       /// Write the provided `NetworkGraph` to the path provided at `FilesystemPersister`
+       /// initialization, within a file called "network_graph"
+       pub fn persist_network_graph(data_dir: String, network_graph: &NetworkGraph) -> Result<(), std::io::Error> {
+               let path = PathBuf::from(data_dir);
+               util::write_to_file(path, "network_graph".to_string(), network_graph)
+       }
+
        /// Read `ChannelMonitor`s from disk.
        pub fn read_channelmonitors<Signer: Sign, K: Deref> (
                &self, keys_manager: K