Accept keys with or without hex prefix (#75)

Part of [laconicd testnet validator enrollment](https://www.notion.so/laconicd-testnet-validator-enrollment-6fc1d3cafcc64fef8c5ed3affa27c675)

Reviewed-on: https://git.vdb.to/cerc-io/laconic-registry-cli/pulls/75
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

README.md

@@ -54,7 +54,15 @@ Registering records in registry requires an account. To get account private key
 laconicd keys export alice --keyring-backend test  --unarmored-hex --unsafe
 ```
 
-In `config.yml` file assign the account private key to `userKey`.
+In `config.yml` file assign the account private key to `userKey`:
+
+```yml
+services:
+  registry:
+    ..
+    userKey: "<user-key>"
+    ..
+```
 
 ## Gas and Fees
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/laconic-registry-cli",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "main": "index.js",
   "repository": "git@github.com:cerc-io/laconic-registry-cli.git",
   "author": "",

src/util/common.ts

@@ -6,11 +6,16 @@ export const getConnectionInfo = (argv: Arguments, config: any) => {
 
   const result = {
     ...config,
+    userKey: stripHexPrefix(config.userKey),
     ...clean({ server, userKey, bondId, txKey, chainId }),
-    privateKey: txKey || userKey || config.userKey,
+    privateKey: stripHexPrefix(txKey || userKey || config.userKey),
     gas: String(gas || config.gas),
     fees: String(fees || config.fees)
   };
 
   return result;
 };
+
+function stripHexPrefix (hex: string): string {
+  return hex && hex.startsWith('0x') ? hex.slice(2) : hex;
+}