Add filtering

sql/sqlite/1.sql

@@ -0,0 +1,13 @@
+CREATE TABLE IF NOT EXISTS chain_sync (
+	id serial primary key not null,
+	blockchain varchar not null,
+	block_start int not null default 0,
+	tx_start int not null default 0,
+	block_cursor int not null default 0,
+	tx_cursor int not null default 0,
+	flags bytea not null,
+	num_flags int not null,
+	block_target int default null,
+	date_created timestamp not null,
+	date_updated timestamp default null
+);

sql/sqlite/2.sql

@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS chain_sync_filter (
+	id serial primary key not null,
+	chain_sync_id int not null,
+	flags bytea default null,
+	count int not null default 0,
+	digest char(64) not null default '0000000000000000000000000000000000000000000000000000000000000000',
+	CONSTRAINT fk_chain_sync
+		FOREIGN KEY(chain_sync_id)
+			REFERENCES chain_sync(id)
+);