Initial commit with translated description

scripts/verifySignature.js

@@ -0,0 +1,66 @@
+const { JWSPacker, byteEncoder } = require("@0xpolygonid/js-sdk");
+const { getInitializedRuntime } = require("./shared/bootstrap");
+const { parseArgs, formatError, outputSuccess } = require("./shared/utils");
+
+async function main() {
+  try {
+    const args = parseArgs();
+
+    if (!args.token) {
+      console.error("Error: --token parameters is required");
+      console.error(
+        "Usage: node scripts/verifySignature.js --did <did> --token <token>",
+      );
+      process.exit(1);
+    }
+
+    const { kms, challengeStorage } = await getInitializedRuntime();
+
+    // Get the stored challenge
+    const challenge = await challengeStorage.getChallenge(args.did);
+    if (!challenge) {
+      console.error(`Error: No challenge found for DID: ${args.did}`);
+      console.error("Generate a challenge first with generateChallenge.js");
+      process.exit(1);
+    }
+
+    // Create DID resolver that fetches from remote resolver
+    const resolveDIDDocument = {
+      resolve: async (did) => {
+        const resp = await fetch(
+          `https://resolver.privado.id/1.0/identifiers/${did}`,
+        );
+        const didResolutionRes = await resp.json();
+        return didResolutionRes;
+      },
+    };
+
+    // Create JWS packer and unpack token
+    const jws = new JWSPacker(kms, resolveDIDDocument);
+    const basicMessage = await jws.unpack(byteEncoder.encode(args.token));
+
+    // Verify the sender
+    if (basicMessage.from !== args.did) {
+      console.error(
+        `Error: Invalid from: expected from ${args.did}, got ${basicMessage.from}`,
+      );
+      process.exit(1);
+    }
+
+    // Verify the challenge matches
+    const payload = basicMessage.body;
+    if (payload.message !== challenge) {
+      console.error(
+        `Error: Invalid signature: challenge mismatch ${payload.message} !== ${challenge}`,
+      );
+      process.exit(1);
+    }
+
+    outputSuccess("Signature verified successfully");
+  } catch (error) {
+    console.error(formatError(error));
+    process.exit(1);
+  }
+}
+
+main();