ethclient: acquire the rpc.Client (ethereum#27246)

Signed-off-by: jsvisa <delweng@gmail.com>

ethclient/ethclient.go

@@ -41,6 +41,7 @@ func Dial(rawurl string) (*Client, error) {
 	return DialContext(context.Background(), rawurl)
 }
 
+// DialContext connects a client to the given URL with context.
 func DialContext(ctx context.Context, rawurl string) (*Client, error) {
 	c, err := rpc.DialContext(ctx, rawurl)
 	if err != nil {
@@ -54,10 +55,16 @@ func NewClient(c *rpc.Client) *Client {
 	return &Client{c}
 }
 
+// Close closes the underlying RPC connection.
 func (ec *Client) Close() {
 	ec.c.Close()
 }
 
+// Client gets the underlying RPC client.
+func (ec *Client) Client() *rpc.Client {
+	return ec.c
+}
+
 // Blockchain Access
 
 // ChainID retrieves the current chain ID for transaction replay protection.