The Ethereum JSON-RPC client returns 401 Error response
In recent days, a common error has been observed during the attempted execution of PHP scripts from the command line using a customer based on Ethereum such as “PHP-Ethereum”. More specifically, the JSONRPCClient.phpJSONRPC file reported an error response 401 after serving a request.
What is happening:
The problem arises when you try to establish a connection to the Ethereum network using the JSON-RPC protocol. The JSONRPCClient.Php JSONRPC file tries to execute a Get request on an Ethereum node, but instead of returning the expected data, it receives an error response 401 indicating an authentication failure.
Causes and consequences:
Error 401 is generally caused by inadequate or expired identification information for the Ethereum network. Here are some possible reasons contributing to this problem:
- Incorrect independence : The JSONRPCClient.php
file can use an obsolete or incorrect identification set, such as a password or a private key that has been compromised.
- Inadequate authentication
: The customer may not authorize himself properly with the Ethereum network, requiring additional information such as public keys or tokens.
- Insufficient configuration : The JSONRPCClient.php file may not have the necessary parameters configured to manage connections to specific nodes on the blockchain.
Troubleshooting stages:
To solve this problem and put back into service, try the following:
- Update JSON-RPC identification information: Check that your account has precise and up-to-date Ethereum portfolio information.
- Check the Node configurations : Make sure you use the Ethereum Correct network (for example, MAINNET, TESTNET) and configure all the necessary parameters in
JSONRPCClient.php.
- Check the authentication methods : Try different authentication methods, such as the use of a public key or tokens, to see if it solves the problem.
- Inspect your PHP script: review your script to make sure you correctly configure the JSON-RPC connection.
Example of use cases:
To solve this problem further, try to execute the following code extract of your installation PHP-Ethereum”:
Php
require_once 'seller / autoload.php';
Use Phpethereum \ JSONRPCClient;
$ RPC = New JSONRPCClient ('http: // Localhost: 8332');
'
This will try to establish a connection to an Ethereum node in memory. If the problem persists, you may need to investigate more to identify and solve the deep cause.
By following these steps, you should be able to diagnose and resolve the 401 error response when you usePHP-Ethereum” with your JSON-RPC client.
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