The following code doesn't print any transactions. What am I missing?
def main():
uni_v3_router = Web3.toChecksumAddress('0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45')
event_filter = w3.eth.filter({"address": uni_v3_router, 'fromBlock':'latest'})
while True:
print("checking for txn")
for res in event_filter.get_new_entries():
print(Web3.toJSON(res))
time.sleep(5)