implement copy_json in rust

phase2/src/bin/copy_json.rs

@@ -0,0 +1,30 @@
+extern crate exitcode;
+extern crate serde_json;
+
+use std::fs;
+use serde_json::*;
+
+fn main() {
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() != 4 {
+        println!("Usage: \n<reference_key.json> <in_key.json> <out_key.json>");
+        std::process::exit(exitcode::USAGE);
+    }
+    let ref_file = &args[1];
+    let in_file = &args[2];
+    let out_file = &args[3];
+
+    let in_json: Map<String, Value> = serde_json::from_str(&fs::read_to_string(in_file).unwrap()).unwrap();
+    let mut reference_json: Map<String, Value> = serde_json::from_str(&fs::read_to_string(ref_file).unwrap()).unwrap();
+
+    for (key, value) in &in_json {
+        reference_json[key] = value.clone();
+    }
+
+    if reference_json.contains_key("vk_alfabeta_12") {
+        reference_json.remove("vk_alfabeta_12").unwrap();
+    }
+
+    fs::write(out_file, serde_json::to_string(&reference_json).unwrap().as_bytes()).unwrap();
+    println!("Done");
+}

phase2/tools/copy_json.py

@@ -1,23 +0,0 @@
-import json
-
-f = json.load(open('proving_key.json'))
-f2 = json.load(open('pk.json'))
-
-for k in f2:
-  f[k] = f2[k]
-
-f3 = open('transformed_pk.json', 'w')
-f3.write(json.dumps(f))
-f3.close()
-
-f = json.load(open('verification_key.json'))
-f2 = json.load(open('vk.json'))
-
-for k in f2:
-  f[k] = f2[k]
-
-del f['vk_alfabeta_12']
-
-f3 = open('transformed_vk.json', 'w')
-f3.write(json.dumps(f))
-f3.close()