added email caching if no internet for input generation

circuits/scripts/generate_input.ts

@@ -12,8 +12,10 @@ import { shaHash } from "../../src/helpers/shaHash";
 import { dkimVerify } from "../../src/helpers/dkim";
 import { assert } from "console";
 import * as fs from "fs";
+var Cryo = require('cryo');
 const pki = require("node-forge").pki;
 
+
 interface ICircuitInputs {
   modulus?: string[];
   signature?: string[];
@@ -135,8 +137,17 @@ export async function getCircuitInputs(
 }
 
 export async function generate_inputs(email: Buffer) {
-  // console.log(email);
-  const result = await dkimVerify(email);
+  var result;
+  try {
+    result = await dkimVerify(email);
+    const _ = result.results[0].publicKey.toString();
+    var frozen = Cryo.stringify(result);
+    fs.writeFileSync(`./email_cache.json`, frozen, { flag: "w" });
+  } catch (e) {
+    console.log("Reading cached email instead!")
+    let frozen = fs.readFileSync(`./email_cache.json`, { encoding: "utf-8" });
+    result = Cryo.parse(frozen);
+  }
 
   let sig = BigInt("0x" + Buffer.from(result.results[0].signature, "base64").toString("hex"));
   let message = result.results[0].status.signature_header;

package.json

@@ -14,6 +14,7 @@
     "base64-sol": "^1.1.0",
     "circomlib": "^2.0.3",
     "circomlibjs": "^0.1.2",
+    "cryo": "^0.0.6",
     "libmime": "^5.1.0",
     "localforage": "^1.10.0",
     "lodash": "^4.17.21",

yarn.lock

@@ -4312,6 +4312,11 @@ cross-spawn@^6.0.0:
     shebang-command "^1.2.0"
     which "^1.2.9"
 
+cryo@^0.0.6:
+  version "0.0.6"
+  resolved "https://registry.yarnpkg.com/cryo/-/cryo-0.0.6.tgz#16833295d2ee16ff39711db840617b7ae4af0ba4"
+  integrity sha512-vSbO1hJvP9oOGXcKHiAj3U37rtErI8jIZ8gOp8EfiQgPncAv6nc4JArGWzqrxlwA5xe6Sph5OUAg//7yqTOyIg==
+
 crypto-browserify@^3.11.0:
   version "3.12.0"
   resolved "https://registry.yarnpkg.com/crypto-browserify/-/crypto-browserify-3.12.0.tgz#396cf9f3137f03e4b8e532c58f698254e00f80ec"