Create btc.gs

sheets/customFunctions/btc.gs

@@ -0,0 +1,40 @@
+/**
+ * Copyright Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// See https://support.coinbase.com/customer/en/portal/articles/1914910-how-can-i-generate-api-keys-within-coinbase-commerce-
+var COINBASE_API_TOKEN = ''; // TODO
+/**
+ * Get's the bitcoin price at a date.
+ *
+ * @param {string} date The date in yyyy-MM-dd format. Defaults to today.
+ * @return The value of BTC in USD at the date. From Coinbase's API
+ * @customfunction
+ */
+function BTC(date) {
+  var dateObject = new Date();
+  if (date) {
+    dateObject = new Date(date);
+  }
+  var dateString = Utilities.formatDate(dateObject, "GMT", "yyyy-MM-dd");
+  var res = UrlFetchApp.fetch("https://api.coinbase.com/v2/prices/BTC-USD/spot?date=" + dateString, {
+     headers: {
+      "CB-VERSION": "2016-10-10",
+      Authorization: "Bearer " + COINBASE_API_TOKEN
+    }
+  });
+  var json = JSON.parse(res.getContentText());
+  return json.data.amount;
+}