bwc

src/js/services/backupService.js

@@ -0,0 +1,83 @@
+'use strict';
+angular.module('copayApp.services')
+  .factory('backupService', function backupServiceFactory($log, $timeout, profileService, sjcl) {
+
+    var root = {};
+
+    var _download = function(ew, filename, cb) {
+      var NewBlob = function(data, datatype) {
+        var out;
+
+        try {
+          out = new Blob([data], {
+            type: datatype
+          });
+          $log.debug("case 1");
+        } catch (e) {
+          window.BlobBuilder = window.BlobBuilder ||
+            window.WebKitBlobBuilder ||
+            window.MozBlobBuilder ||
+            window.MSBlobBuilder;
+
+          if (e.name == 'TypeError' && window.BlobBuilder) {
+            var bb = new BlobBuilder();
+            bb.append(data);
+            out = bb.getBlob(datatype);
+            $log.debug("case 2");
+          } else if (e.name == "InvalidStateError") {
+            // InvalidStateError (tested on FF13 WinXP)
+            out = new Blob([data], {
+              type: datatype
+            });
+            $log.debug("case 3");
+          } else {
+            // We're screwed, blob constructor unsupported entirely   
+            $log.debug("Errore");
+          }
+        }
+        return out;
+      };
+
+      var a = document.createElement("a");
+      document.body.appendChild(a);
+      a.style = "display: none";
+
+      var blob = new NewBlob(ew, 'text/plain;charset=utf-8');
+      var url = window.URL.createObjectURL(blob);
+      a.href = url;
+      a.download = filename;
+      a.click();
+      $timeout(function() {
+        window.URL.revokeObjectURL(url);
+      }, 250);
+      return cb();
+    };
+
+    root.walletExport = function(password) {
+      if (!password) {
+        return null;
+      }
+      var fc = profileService.focusedClient;
+      try {
+        var b = fc.export({});
+        var e = sjcl.encrypt(password, b, {
+          iter: 10000
+        });
+        return e;
+      } catch (err) {
+        $log.debug('Error exporting wallet: ', err);
+        return null;
+      };
+    };
+
+    root.walletDownload = function(password, cb) {
+      var fc = profileService.focusedClient;
+      var ew = root.walletExport(password);
+      if (!ew) return cb('Could not create backup');
+
+      var walletName = fc.credentials.walletName;
+      var filename = walletName + '-Copaybackup.aes.json';
+      _download(ew, filename, cb)
+    };
+    return root;
+  });