Poll until timeout or until send-l2 succeeds

.github/workflows/testnode.bash

@@ -1,14 +1,40 @@
-#!/usr/bin/env bash
-# The script starts up the test node (with timeout 1 minute), with option to
-# run l2 transactions to make sure node is working
+#!/bin/bash
+# The script starts up the test node and waits until the timeout (10min) or 
+# until send-l2 succeeds.
+GITHUB_WORKSPACE=.
+# Start the test node and get PID, to terminate it once send-l2 is done.
+${GITHUB_WORKSPACE}/test-node.bash --init > output.log 2>&1 &
+PID=$!
 
-timeout 20m ${GITHUB_WORKSPACE}/test-node.bash --init --detach
-sleep 20m
-${GITHUB_WORKSPACE}/test-node.bash script send-l2 --ethamount 100 --to user_l2user --wait  || exit_status=$?
+sleep 5m
 
-if  [ -n "$exit_status" ] && [ $exit_status -ne 0 ] && [ $exit_status -ne 124 ]; then
-    echo "Testnode failed."
-    exit $exit_status
+START=$(date +%s)
+SUCCEDED=0
+
+while true; do
+    if ${GITHUB_WORKSPACE}/test-node.bash script send-l2 --ethamount 100 --to user_l2user --wait; then
+        echo "Sending l2 transaction succeeded"
+        SUCCEDED=1
+        break
+    fi
+
+    # Check if the timeout (10 min) has been reached.
+    NOW=$(date +%s)
+    DIFF=$((NOW - START))
+    if [ "$DIFF" -ge 600 ]; then
+        echo "Timed out"
+        break
+    fi
+
+    sleep 10
+done
+
+# Shut down the test node and wait for it to terminate.
+kill $PID
+wait $PID
+
+if [ "$SUCCEDED" -eq 0 ]; then
+    exit 1
 fi
 
-echo "Testnode succeeded."
+exit 0