Description

This PR improves the handling of environment variable overrides in the node checker script and ensures consistent URL formatting.

Changes

1. Environment Variable Override Improvements:

   • Modified environment variable override logic to handle individual variable overrides
   • Added default values for unset variables
   • Improved error handling for missing variables
   • Now supports partial overrides of either IP or port for both endpoints

2. URL Format Consistency:

   • Added http:// prefix to EL_RPC_ENDPOINT default value
   • Added http:// prefix to overridden EL_RPC_ENDPOINT value
   • Ensures consistent URL formatting across both endpoints

Testing

The changes allow for more flexible configuration in .env.overrides:

Environment Variable Overrides

• Can override just CL_REST_PORT while keeping default localhost
• Can override just CL_IP_ADDRESS while keeping default port
• Can override just EL_RPC_PORT while keeping default localhost
• Can override just EL_IP_ADDRESS while keeping default port
• Can override both variables for either endpoint
• Can override none of the variables

URL Format

• Both endpoints now consistently use http:// prefix
• Default values:
  • API_BN_ENDPOINT="http://localhost:5052"
  • EL_RPC_ENDPOINT="http://localhost:8545"
• Overridden values maintain the http:// prefix

Example .env.overrides Configurations

# Override just the consensus layer port
CL_REST_PORT=3500

# Override just the execution layer IP
EL_IP_ADDRESS=192.168.1.100

# Override both consensus layer variables
CL_IP_ADDRESS=192.168.1.100
CL_REST_PORT=3500

# Override both execution layer variables
EL_IP_ADDRESS=192.168.1.100
EL_RPC_PORT=8545