Add 'bolt11 decode' command as excutable

bin.js

@@ -0,0 +1,16 @@
+#!/usr/bin/env node
+
+// Call bolt11 decode from the command line.
+
+const decode = require('./payreq').decode
+
+const [,, command, invoice] = process.argv
+
+if (command !== 'decode') {
+  throw new Error('Invalid command, expected "bolt11 decode <invoice>"')
+}
+
+const results = decode(invoice)
+
+console.log(JSON.stringify(results, null, 2))
+

package.json

@@ -15,6 +15,9 @@
     "test": "npm run standard && npm run coverage",
     "unit": "tape test/*.js"
   },
+  "bin": {
+    "bolt11": "./bin.js"
+  },
   "devDependencies": {
     "nyc": "^15.0.0",
     "standard": "*",