add crypto URI parser from the old wallet

src/utils/cryptoUriParser.js

@@ -0,0 +1,39 @@
+/* eslint-disable no-param-reassign */
+/* eslint-disable prefer-destructuring */
+/* @flow */
+
+// copy paste from mytrezor (old wallet) https://github.com/satoshilabs/mytrezor/blob/87f8a8d9ca82a27b3941c5ec0f399079903f2bfd/app/components/address-input/address-input.js
+
+export type parsedURI = {
+    address: string,
+    amount: ?string,
+};
+
+// Parse a string read from a bitcoin QR code into an object
+export const parseUri = (uri: string): ?parsedURI => {
+    const str = stripPrefix(uri);
+    const query: Array<string> = str.split('?');
+    const values: Object = (query.length > 1) ? parseQuery(query[1]) : {};
+    values.address = query[0];
+
+    return values;
+};
+
+const stripPrefix = (str: string): string => {
+    if (!str.match(':')) {
+        return str;
+    }
+    const parts = str.split(':');
+    parts.shift();
+    return parts.join('');
+};
+
+// Parse URL query string (like 'foo=bar&baz=1337) into an object
+const parseQuery = (str: string): {} => str.split('&')
+    .map(val => val.split('='))
+    .reduce((vals, pair) => {
+        if (pair.length > 1) {
+            vals[pair[0]] = pair[1];
+        }
+        return vals;
+    }, {});