Connect to the blockchain node through an RPC driver

post https://api.tatum.io/v3/blockchain/node/{chain}/{xApiKey}/{rpcPath}

The number of credits consumed depends on the number of methods submitted in an API call:
* 50 credits per debug*/trace* method (for EVM-based blockchains)
* 50 credits per EOS Trace API methods
* 5 credits per eth_call method (for EVM-based blockchains)
* 2 credits per any other RPC method

Connect directly to the blockchain node provided by Tatum.

The POST method is used. The API endpoint URL acts as an HTTP-based RPC driver.