1 files changed, 87 insertions, 0 deletions
diff --git a/api/validators/ZchainValidator/index.js b/api/validators/ZchainValidator/index.js
new file mode 100644
index 0000000..90cdb35
--- /dev/null
+++ b/api/validators/ZchainValidator/index.js
@@ -0,0 +1,87 @@
+/*
+ * To verify a block we simply put it on `enter`. `enter` will crawl
+ * the zchain that is connected to the zblock we got. If it fails for
+ * any reason we can check `logfollow` for that.
+ */
+
+const { spawn } = require("child_process");
+const fs = require("fs");
+const config = require("../../config.js");
+console.log(config);
+
+/*
+ * Adds a latest given zblock to a file.
+ *
+ * Returns:
+ *     - error if error
+ *     - success:
+ *         - adds the entry to the file
+ *         - returns the whole file to the client
+ *
+ */
+function addEntriesToFile(entry,res){
+    var data = JSON.parse(fs.readFileSync(config.pairsFile));
+
+    var duplicate_entry = 0;
+    data.forEach(a=>{
+        if ( a.zblock === entry.zblock ){
+            duplicate_entry = 1;
+            res.send({errno:"already there"});
+        }
+    });
+
+    if ( duplicate_entry === 0 ) {
+        var all = [entry];
+        for (var i = 0; i < data.length; i++){
+            all[i+1] = data[i];
+        }
+        var json = JSON.stringify(all);
+        fs.writeFile(config.blocksFile, json, 'utf8', finished);
+        function finished(err) {
+            console.log('finished writing file');
+        }
+        res.send(json);
+    }
+}
+/*
+ * After validation went through we examine the return code
+ * of the application that run the test.
+ *
+ * Returns :
+ *     - errno on failure
+ *     - on success we process with addEntriesToFile()
+ *
+ */
+function continuethings(exitcode,sh,res){
+    if (exitcode === 0){
+        var entry = {zblock:sh};
+        addEntriesToFile(entry,res);
+    } else {
+        res.send({errno:"Invalid data"});
+    }
+}
+/*
+ * We send the data tested and the exit code to continuethings()
+ *
+ */
+module.exports = (ch, res) => {
+    const command = spawn("ak-enter",["-n",ch]);
+    response_string = "";
+    command.stdout.on("data", data => {
+        response_string = response_string + data;
+        console.log(`${data}`);
+    });
+
+    command.stderr.on("data", data => {
+            console.log(`stderr: ${data}`);
+    });
+
+    command.on('error', (error) => {
+            console.log(`error: ${error.message}`);
+    });
+
+    command.on("close", code => {
+        console.log(`child process exited with code ${code}`);
+        continuethings(code,ch,res);
+    });
+};