Implement client for RPC endpoint

pkg/client/client.go

@@ -0,0 +1,54 @@
+// VulcanizeDB
+// Copyright © 2022 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package client
+
+import (
+	"github.com/ethereum/go-ethereum/rpc"
+)
+
+type Client struct {
+	c *rpc.Client
+}
+
+// NewClient creates a new Client with a connection to leveldb-ethdb-rpc RPC endpoint.
+func NewClient(c *rpc.Client) *Client {
+	return &Client{
+		c: c,
+	}
+}
+
+func (c *Client) Has(key []byte) (bool, error) {
+	var resp bool
+	err := c.c.Call(&resp, "leveldb_has", key)
+
+	if err != nil {
+		return resp, err
+	}
+
+	return resp, nil
+}
+
+func (c *Client) Get(key []byte) ([]byte, error) {
+	var resp []byte
+	err := c.c.Call(&resp, "leveldb_get", key)
+
+	if err != nil {
+		return resp, err
+	}
+
+	return resp, nil
+}