The European Central Bank is expected to hike interest rates next week, becoming the first of the biggest central banks to do so since the Iran war unleashed an energy crisis that is stoking inflationary pressures in the euro zone. But with the economy of the 21-country bloc weaker than during Europe's previous energy crisis in 2022, policymakers are walking a tightrope as they try to contain rising prices without exacerbating the growth hit from the crisis.