update and relocate script files

scripts/floExchangeAPI.js

@@ -1,6 +1,6 @@
 'use strict';
 
-(function (EXPORTS) { //floExchangeAPI v1.2.0
+(function (EXPORTS) { //floExchangeAPI v1.2.0a
     const exchangeAPI = EXPORTS;
 
     const DEFAULT = {
@@ -1731,19 +1731,20 @@
                 if (typeof nodes !== 'object' || nodes === null)
                     throw Error('nodes must be an object')
                 else
-                    lastTx = parseInt(localStorage.getItem(_l('lastTx'))) || 0;
+                    lastTx = localStorage.getItem(_l('lastTx'));
             } catch (error) {
                 nodes = {};
                 trusted = new Set();
                 assets = new Set();
                 tags = new Set();
-                lastTx = 0;
             }
-            floBlockchainAPI.readData(DEFAULT.marketID, {
-                ignoreOld: lastTx,
-                sentOnly: true,
-                pattern: DEFAULT.marketApp
-            }).then(result => {
+
+            var query_options = { sentOnly: true, pattern: DEFAULT.marketApp };
+            if (typeof lastTx == 'string' && /^[0-9a-f]{64}/i.test(lastTx))//lastTx is txid of last tx
+                query_options.after = lastTx;
+            else if (!isNaN(lastTx))//lastTx is tx count (*backward support)
+                query_options.ignoreOld = parseInt(lastTx);
+            floBlockchainAPI.readData(DEFAULT.marketID, query_options).then(result => {
                 result.data.reverse().forEach(data => {
                     var content = JSON.parse(data)[DEFAULT.marketApp];
                     //Node List
@@ -1782,7 +1783,7 @@
                                 tags.add(t);
                     }
                 });
-                localStorage.setItem(_l('lastTx'), result.totalTxs);
+                localStorage.setItem(_l('lastTx'), result.lastItem);
                 localStorage.setItem(_l('nodes'), JSON.stringify(nodes));
                 localStorage.setItem(_l('trusted'), Array.from(trusted).join(","));
                 localStorage.setItem(_l('assets'), Array.from(assets).join(","));
@@ -1910,4 +1911,4 @@
         }
     }
 
-})('object' === typeof module ? module.exports : window.floExchangeAPI = {});
+})('object' === typeof module ? module.exports : window.floExchangeAPI = {});