Simple dapp

src/cc/dapps/oraclefeed.cpp

@@ -0,0 +1,47 @@
+/******************************************************************************
+ * Copyright © 2014-2018 The SuperNET Developers.                             *
+ *                                                                            *
+ * See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at                  *
+ * the top-level directory of this distribution for the individual copyright  *
+ * holder information and the developer policies on copyright and licensing.  *
+ *                                                                            *
+ * Unless otherwise agreed in a custom licensing agreement, no part of the    *
+ * SuperNET software, including this file may be copied, modified, propagated *
+ * or distributed except according to the terms contained in the LICENSE file *
+ *                                                                            *
+ * Removal or modification of this copyright notice is prohibited.            *
+ *                                                                            *
+ ******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "../../komodo_cJSON.c"
+#include "../../komodo_bitcoind.h"
+
+#define issue_curl(url,cmdstr) bitcoind_RPC(0,(char *)"curl",(char *)(url),0,0,(char *)(cmdstr))
+
+cJSON *url_json(char *url)
+{
+    char *jsonstr; cJSON *json = 0;
+    if ( (jsonstr= issue_curl(url)) != 0 )
+    {
+        printf("(%s) -> (%s)\n",url,jsonstr);
+        json = cJSON_Parse(jsonstr);
+        free(jsonstr);
+    }
+    return(json);
+}
+
+int32_t main(int32_t argc,char **argv)
+{
+    cJSON *pjson,*bpi,*usd;
+    printf("Powered by CoinDesk (%s)\n","https://www.coindesk.com/price/");
+    if ( (pjson= url_json("http://api.coindesk.com/v1/bpi/currentprice.json","")) != 0 )
+    {
+        if ( (bpi= jobj(pjson,"bpi")) != 0 && (usd= jobj(bpi,"USD")) != 0 )
+            printf("BTC/USD %.4f\n",jdouble(usd,"rate_float"));
+        json_close(pjson);
+    }
+    return(0);
+}