From: Matt Corallo <git@bluematt.me>
Date: Sun, 11 Sep 2022 21:07:57 +0000 (+0000)
Subject: Drop the chain_hash column
X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=a5b963c54a4eef59a0b2235e271e9481169db669;p=rapid-gossip-sync-server

Drop the chain_hash column
---

diff --git a/src/config.rs b/src/config.rs
index e7ba89c..81db4cf 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -5,7 +5,7 @@ use lightning_block_sync::http::HttpEndpoint;
 use tokio_postgres::Config;
 use crate::hex_utils;
 
-pub(crate) const SCHEMA_VERSION: i32 = 1;
+pub(crate) const SCHEMA_VERSION: i32 = 2;
 pub(crate) const SNAPSHOT_CALCULATION_INTERVAL: u32 = 3600 * 24; // every 24 hours, in seconds
 pub(crate) const DOWNLOAD_NEW_GOSSIP: bool = true;
 
@@ -49,7 +49,6 @@ pub(crate) fn db_announcement_table_creation_query() -> &'static str {
 		id SERIAL PRIMARY KEY,
 		short_channel_id character varying(255) NOT NULL UNIQUE,
 		block_height integer,
-		chain_hash character varying(255),
 		announcement_signed BYTEA,
 		seen timestamp NOT NULL DEFAULT NOW()
 	)"
@@ -59,7 +58,6 @@ pub(crate) fn db_channel_update_table_creation_query() -> &'static str {
 	"CREATE TABLE IF NOT EXISTS channel_updates (
 		id SERIAL PRIMARY KEY,
 		composite_index character varying(255) UNIQUE,
-		chain_hash character varying(255),
 		short_channel_id character varying(255),
 		timestamp bigint,
 		channel_flags integer,
@@ -85,9 +83,15 @@ pub(crate) fn db_index_creation_query() -> &'static str {
 }
 
 pub(crate) async fn upgrade_db(schema: i32, client: &mut tokio_postgres::Client) {
-	match schema {
-		SCHEMA_VERSION => {},
-		_ => panic!("Unknown schema in db: {}, we support up to {}", schema, SCHEMA_VERSION),
+	if schema == 1 {
+		let tx = client.transaction().await.unwrap();
+		tx.execute("ALTER TABLE channel_updates DROP COLUMN chain_hash", &[]).await.unwrap();
+		tx.execute("ALTER TABLE channel_announcements DROP COLUMN chain_hash", &[]).await.unwrap();
+		tx.execute("UPDATE config SET db_schema = 2 WHERE id = 1", &[]).await.unwrap();
+		tx.commit().await.unwrap();
+	}
+	if schema <= 1 || schema > SCHEMA_VERSION {
+		panic!("Unknown schema in db: {}, we support up to {}", schema, SCHEMA_VERSION);
 	}
 }
 
diff --git a/src/persistence.rs b/src/persistence.rs
index d961b30..8fbf166 100644
--- a/src/persistence.rs
+++ b/src/persistence.rs
@@ -115,8 +115,6 @@ impl GossipPersister {
 					// block height is the first three bytes
 					// to obtain block height, shift scid right by 5 bytes (40 bits)
 					let block_height = (scid >> 5 * 8) as i32;
-					let chain_hash = announcement.contents.chain_hash.as_ref();
-					let chain_hash_hex = hex_utils::hex_str(chain_hash);
 
 					// start with the type prefix, which is already known a priori
 					let mut announcement_signed = Vec::new();
@@ -126,12 +124,10 @@ impl GossipPersister {
 						.execute("INSERT INTO channel_announcements (\
 							short_channel_id, \
 							block_height, \
-							chain_hash, \
 							announcement_signed \
-						) VALUES ($1, $2, $3, $4) ON CONFLICT (short_channel_id) DO NOTHING", &[
+						) VALUES ($1, $2, $3) ON CONFLICT (short_channel_id) DO NOTHING", &[
 							&scid_hex,
 							&block_height,
-							&chain_hash_hex,
 							&announcement_signed
 						]).await;
 					if result.is_err() {
@@ -142,9 +138,6 @@ impl GossipPersister {
 					let scid = update.contents.short_channel_id;
 					let scid_hex = hex_utils::hex_str(&scid.to_be_bytes());
 
-					let chain_hash = update.contents.chain_hash.as_ref();
-					let chain_hash_hex = hex_utils::hex_str(chain_hash);
-
 					let timestamp = update.contents.timestamp as i64;
 
 					let channel_flags = update.contents.flags as i32;
@@ -167,7 +160,6 @@ impl GossipPersister {
 					let result = client
 						.execute("INSERT INTO channel_updates (\
 							composite_index, \
-							chain_hash, \
 							short_channel_id, \
 							timestamp, \
 							channel_flags, \
@@ -179,9 +171,8 @@ impl GossipPersister {
 							fee_proportional_millionths, \
 							htlc_maximum_msat, \
 							blob_signed \
-						) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13)  ON CONFLICT (composite_index) DO NOTHING", &[
+						) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)  ON CONFLICT (composite_index) DO NOTHING", &[
 							&composite_index,
-							&chain_hash_hex,
 							&scid_hex,
 							&timestamp,
 							&channel_flags,