feat: implement

.gitignore

@@ -0,0 +1 @@
+node_modules/

index.js

@@ -0,0 +1,88 @@
+const IlpPacket = require('ilp-packet')
+const BtpPacket = require('btp-packet')
+const { argv } = require('yargs')
+
+// Here's our packet to parse
+const packet = argv._[0]
+const encoding = (argv.encoding || (argv.hex ? 'hex' : 'base64'))
+
+if (!packet) {
+  console.error('no packet provided.')
+  process.exit(1)
+}
+
+function parseBtp (packet) {
+  console.error('attempting to parse as btp. encoding=' + encoding)
+  const parsedBtp = BtpPacket.deserialize(Buffer.from(packet, encoding))
+
+  for (const protocol of parsedBtp.data.protocolData) {
+    try {
+      if (protocol.protocolName === 'ilp') {
+        protocol.contentType = 'application/octet-stream'
+        protocol.data = parseIlp(protocol.data)
+        continue
+      }
+    } catch (e) {
+      // TODO
+    }
+
+    switch (protocol.contentType) {
+      case BtpPacket.MIME_APPLICATION_OCTET_STREAM:
+        protocol.contentType = 'application/octet-stream'
+        protocol.data = protocol.data.toString('hex')
+        break
+
+      case BtpPacket.MIME_TEXT_PLAIN_UTF8:
+        protocol.contentType = 'text/plain-utf8'
+        protocol.data = protocol.data.toString()
+        break
+
+      case BtpPacket.MIME_APPLICATION_JSON:
+        protocol.contentType = 'application/json'
+        try {
+          protocol.data = JSON.parse(protocol.data.toString())
+        } catch (e) {
+          // TODO
+          protocol.data = protocol.data.toString()
+        }
+        break
+    }
+  }
+
+  return parsedBtp
+}
+
+function parseIlp (packet) {
+  console.error('attempting to parse as ilp. encoding=' + encoding)
+  const parsedIlp = IlpPacket
+    .deserializeIlpPacket(Buffer.from(packet, encoding))
+
+  for (const field of Object.keys(parsedIlp.data)) {
+    if (Buffer.isBuffer(parsedIlp.data[field])) {
+      parsedIlp.data[field] = parsedIlp.data[field].toString('hex')
+    }
+  }  
+
+  return parsedIlp
+}
+
+function pretty (obj) {
+  console.log(JSON.stringify(obj, null, 2))
+}
+
+if (argv.btp) {
+  pretty(parseBtp(packet))
+} else if (argv.ilp) {
+  pretty(parseIlp(packet))
+} else {
+  try {
+    pretty(parseIlp(packet))
+  } catch (e) {
+    console.error('packet is not ilp.')
+    try {
+      pretty(parseBtp(packet))
+    } catch (e) {
+      console.error('packet is neither btp nor ilp.')
+    }
+  }
+}