Solana-wallet: print JSON RPC endpoint (#5482)

* Print RPC endpoint in use

* Fixup wallet-sanity

scripts/wallet-sanity.sh

@@ -39,7 +39,7 @@ check_balance_output() {
 
 pay_and_confirm() {
   exec 42>&1
-  signature=$($solana_wallet "${entrypoint[@]}" pay "$@" | tee >(cat - >&42))
+  signature=$($solana_wallet "${entrypoint[@]}" pay "$@" | tail -c 88 | tee >(cat - >&42))
   $solana_wallet "${entrypoint[@]}" confirm "$signature"
 }
 

wallet/src/wallet.rs

@@ -1120,6 +1120,7 @@ pub fn process_command(config: &WalletConfig) -> ProcessResult {
         // Get address of this client
         return Ok(format!("{}", config.keypair.pubkey()));
     }
+    println_name_value("Using RPC Endpoint:", &config.json_rpc_url);
 
     let drone_addr = config.drone_addr();