Validates whether the ACCOUNT_ADDRESS variable has been set in the '.env' file and returns it; panics otherwise.

Validates whether the ACCOUNT_CAIRO_VERSION variable has been set in the '.env' file and returns it; panics otherwise.

Validates whether the PRIVATE_KEY variable has been set in the '.env' file and returns it; panics otherwise.

Validates whether the PUBLIC_KEY variable has been set in the '.env' file and returns it; panics otherwise.

Validates whether the RPC_PROVIDER_URL variable has been set in the '.env' file and returns it; panics otherwise.

PadZerosInFelt pads zeros to the left of a hex felt value to make it 64 characters long.

Default "panic" but printing all RPCError fields (code, message, and data).