Lesson 4 - Connecting to Rinkeby through infura

[zbilly18]

I got an HTTP provider from infura but when I try to run it I get a 502 response from the link - I tried to open the link on my browser and get a 404 error... traceback:

Traceback (most recent call last):
  File "C:\Users\zbill\Desktop\2022\Programming\Blockchain\FreeCodeCamp - Python\demos\deploy.py", line 59, in <module>
    tx_hash = w3.eth.send_raw_transaction(signed_txn.rawTransaction)
  File "C:\Python310\lib\site-packages\web3\eth.py", line 831, in send_raw_transaction
    return self._send_raw_transaction(transaction)
  File "C:\Python310\lib\site-packages\web3\module.py", line 57, in caller
    result = w3.manager.request_blocking(method_str,
  File "C:\Python310\lib\site-packages\web3\manager.py", line 197, in request_blocking
    response = self._make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\manager.py", line 150, in _make_request
    return request_func(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\formatting.py", line 94, in middleware
    response = make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\gas_price_strategy.py", line 90, in middleware      
    return make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\formatting.py", line 94, in middleware
    response = make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\attrdict.py", line 33, in middleware
    response = make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\formatting.py", line 94, in middleware
    response = make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\formatting.py", line 94, in middleware
    response = make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\formatting.py", line 94, in middleware
    response = make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\buffered_gas_estimate.py", line 40, in middleware   
    return make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\middleware\exception_retry_request.py", line 105, in middleware    return make_request(method, params)
  File "C:\Python310\lib\site-packages\web3\providers\rpc.py", line 88, in make_request
    raw_response = make_post_request(
  File "C:\Python310\lib\site-packages\web3\_utils\request.py", line 103, in make_post_request
    response.raise_for_status()
  File "C:\Python310\lib\site-packages\requests\models.py", line 1021, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 502 Server Error: Bad Gateway for url: https://rinkeby.infura.io/v3/

Infura does have an API Key - am I missing something by not using that?

[cromewar]

Hello @zbilly18
please give a look to #980 and give us more information.
My guess is you are not connecting correctly to the Infura endpoint, recently they updated they connection standard and the way to connect to the endpoint has changed, please take a look into infura docs.

[zbilly18]

I think it was a problem with the server and not the code - problem resolved on its own after a day. Thank you!

[cromewar]

I'm glad is solved now