Support posting signature to service

lib/core/logic/authentication.js

@@ -1,5 +1,6 @@
 const persistence = require("../persistence/persistence");
 const cryptoUtil = require("../cryptoUtil");
+const postSignature = require("./post-signature");
 
 module.exports.authenticate = function(challenge, authenticationRequest, argv) {
     persistence().LoadDB()
@@ -46,8 +47,13 @@ module.exports.authenticate = function(challenge, authenticationRequest, argv) {
         
                         var challengeDerivationPath = `${lock.extendedPublicKey.derivationPath}/${challenge.derivationPath.split("c/")[1]}`;
                         
-                        const signature = cryptoUtil.signMessage(walletXpriv, challengeDerivationPath, challenge.message)
+                        const signature = cryptoUtil.signMessage(walletXpriv, challengeDerivationPath, challenge.message).toString('hex');
-                        console.log("Signature: ", signature.toString('hex'));
+                        console.log("Signature: ", signature);
+
+                        postSignature.postSignature(authenticationRequest.responseEndpoint, {
+                            id: challenge.id,
+                            signature: signature
+                        })
                     } else {
                         console.error("Challenge not signed by registered service.");
                     }

lib/core/logic/post-signature.js

@@ -0,0 +1,10 @@
+const needle = require('needle');
+module.exports.postSignature = function(endpoint, signature) {
+    needle('post', endpoint, signature, { json: true })
+        .then(response => {
+            console.log("Response: ", response.statusMessage);
+            console.log("Body: ", response.body);
+        }).catch(error => {
+            console.error("Failed to sign request: ", error);
+        })
+}

package.json

@@ -13,6 +13,7 @@
     "bip39": "^3.0.2",
     "config": "^3.2.4",
     "nanoid": "^2.1.7",
+    "needle": "^2.4.0",
     "sequelize": "^5.21.2",
     "sqlite3": "^4.1.0",
     "yargs": "^15.0.2"