Get the current Sui node URL.
If no URL has been set, it defaults to the mainnet full node URL.
Returns string
Deprecated
The SDK no longer uses JSON-RPC for reads. Use the
GraphQL singleton via getGraphQLClient() / setGraphQLUrl() for
new code; this accessor is kept for legacy callers.
Get the current Sui node URL. If no URL has been set, it defaults to the mainnet full node URL.