implement db garbage collection (fixes #4526, #4188)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/types.ts b/src/types.ts
index 39f0a850d..ec4929c33 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -506,6 +506,13 @@ export interface ExchangeRecord {
   lastUpdateTime: number;
 
   /**
+   * When did we actually use this exchange last (in milliseconds).  If we
+   * never used the exchange for anything but just updated its info, this is
+   * set to 0.  (Currently only updated when reserves are created.)
+   */
+  lastUsedTime: number;
+
+  /**
    * Last observed protocol version.
    */
   protocolVersion?: string;