How ​​to Enable Debug Logging for RPC Accesses on Ethereum

As a developer working with Ethereum, it is essential to keep track of RPC (Remote Procedure Call) access logs in order to debug and troubleshoot your network. This article will guide you through the process of enabling debug logging for RPC accesses on your Bitcoin Core wallet.

Why is Debugging Necessary?

RPC access logs provide valuable information about how your application interacts with the Ethereum network, including the names of commands, callers, and parameters used. By analyzing these logs, you can identify potential errors, optimize performance, and improve the overall user experience.

Prerequisites

Before enabling debug logging for RPC accesses:

• Make sure your Bitcoin Core wallet is up to date.

• Install the bitcoind-cli command-line interface (CLI) on your system.

Enabling debug logging

To enable debug logging for RPC accesses, follow these steps:

Step 1: Create a new file for debug logging configuration

Create a new file called .debug-eth-debug.json in the root directory of your Bitcoin Core installation. This file will store the debug logging configuration.

{
"rpc_access_logs": {
"format": "json",
"log_file": "/path/to/your/debug/logfile.json"
}
}

Replace /path/to/your/debug/logfile.json with the desired location for the log file. This will store all RPC access logs in this JSON file.

Step 2: Create a new configuration script

Create a new file called debug-eth-debug.sh in the .debug-eth-debug directory (created in the previous step). This script will read the debug log configuration and write it to the log file.

#!/bin/bash

Set the log file location
LOG_FILE="/path/to/your/debug/logfile.json"

Parse the JSON configuration
while IFS="," read -r command caller params; yes
echo "{
\"command\": \"$command\",
\"caller\": \"$caller\",
\"params\": [\"$params\"]"
} >> $LOG_FILE
done < /dev/null
echo "$LOG_FILE" > debug.log

Save this script and make it executable by running chmod +x debug-eth-debug.sh. Then, add the following line to your shell configuration file (e.g. ~/.bashrc or ~/.zshrc) to run the script on startup.

source ~/.debug-eth-debug.sh

Using debug logging

Once you have enabled debug logging for RPC accesses:

• Run the following command to access the debug log file:

bitcoind -logformat jsonrpcdebug /path/to/your/debug/logfile.json

• Open a new terminal and run:

bitcoind --logdebug /path/to/your/debug/logfile.json

This will display the debug log file, which will show all RPC access events with their parameters.

Tips and variations

• To enable logging for specific commands or RPC interfaces (e.g. eth or wss), add the appropriate flags to their command line argument. For example:

bitcoind --logformat jsonrpcdebug --interface wss myapp eth '{"method": "getbalance", "params": []}'

• To exclude specific logs from display, you can use the --exclude flag followed by a list of log names or paths. For example:

bitcoind --logformat jsonrpcdebug --interface wss myapp --exclude debug rpcaccess