handles keyset pagination

Author: davidsklar99

v2/definitions/strat_names.ts

@@ -175,6 +175,7 @@ module.exports = function (req, res, next, cb) {
           },
           {
             data: response.rows,
+            last_id: lastIdOut,
           },
         );
       }

v2/larkin.ts

@@ -243,6 +243,10 @@ const { Client, Pool } = require("pg");
         .send(JSON.stringify(outgoing.data, null, 0));
     }
 
+    if (options.last_id) {
+      outgoing.last_id = options.last_id;
+    }
+
     if (options.refs) {
       larkin.getRefs(options.refs, outgoing.data, function (refs) {
         outgoing.refs = refs;
@@ -266,6 +270,10 @@ const { Client, Pool } = require("pg");
       responseObject.success["refs"] = outgoing.refs;
     }
 
+    if (outgoing.last_id) {
+      responseObject.success["last_id"] = outgoing.last_id;
+    }
+
     if ((options && options.compact) || outgoing.data.length <= 5) {
       return res
         .set("Content-type", "application/json; charset=utf-8")