add tx logger

src/app/execution/txLogger.js

@@ -0,0 +1,31 @@
+'use strict'
+
+module.exports = (opts = {}) => {
+  opts.events.txListener.register('newTransaction', (tx) => {
+    log(tx, opts.api)
+  })
+}
+
+function log (tx, api) {
+  var resolvedTransaction = api.resolvedTransaction(tx.hash)
+  if (resolvedTransaction) {
+    api.parseLogs(tx, resolvedTransaction.contractName, api.compiledContracts(), (error, logs) => {
+      if (!error) {
+        api.log(renderResolvedTransaction(tx, resolvedTransaction, logs))
+      }
+    })
+  } else {
+    // contract unknown - just displaying raw tx.
+    api.log(renderTransaction(tx))
+  }
+}
+
+function renderResolvedTransaction (tx, resolvedTransaction, logs) {
+  console.log([tx, resolvedTransaction])
+  return JSON.stringify([tx, resolvedTransaction])
+}
+
+function renderTransaction (tx) {
+  console.log(tx)
+  return JSON.stringify(tx)
+}