Implemented Free Gas Tracker Endpoints

gas_tracker.go

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2022 Avi Misra
+ *
+ * Use of this work is governed by a MIT License.
+ * You may find a license copy in project root.
+ */
+
+package etherscan
+
+// GasEstiamte gets estiamted confirmation time (in seconds) at the given gas price
+func (c *Client) GasEstimate(gasPrice int) (confirmationTimeInSec string, err error) {
+	params := M{"gasPrice": gasPrice}
+	err = c.call("gastracker", "gasestimate", params, &confirmationTimeInSec)
+	return
+}
+
+// GasOracle gets suggested gas prices (in Gwei)
+func (c *Client) GasOracle() (gasPrices GasPrices, err error) {
+	err = c.call("gastracker", "gasoracle", M{}, &gasPrices)
+	return
+}

gas_tracker_e2e_test.go

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2018 LI Zhennan
+ *
+ * Use of this work is governed by a MIT License.
+ * You may find a license copy in project root.
+ */
+
+package etherscan
+
+import (
+	"testing"
+)
+
+//GasEstiamte generates dynamic data. Best we can do is ensure all fields are populated
+func TestClient_GasEstimate(t *testing.T) {
+	confirmationTime, err := api.GasEstimate(20000000)
+	noError(t, err, "api.GasEstimate")
+
+	if 0 == len(confirmationTime) {
+		t.Errorf("confirmationTime empty string")
+	}
+}
+
+//GasOracle generates dynamic data. Best we can do is ensure all fields are populated
+func TestClient_GasOracle(t *testing.T) {
+	gasPrice, err := api.GasOracle()
+	noError(t, err, "api.GasOrcale")
+
+	if 0 == len(gasPrice.LastBlock) {
+		t.Errorf("gasPrice.LastBlock empty string")
+	}
+
+	if 0 == len(gasPrice.SafeGasPrice) {
+		t.Errorf("gasPrice.SafeGasPrice empty string")
+	}
+
+	if 0 == len(gasPrice.ProposeGasPrice) {
+		t.Errorf("gasPrice.ProposeGasPrice empty string")
+	}
+
+	if 0 == len(gasPrice.FastGasPrice) {
+		t.Errorf("gasPrice.FastGasPrice empty string")
+	}
+
+	if 0 == len(gasPrice.SuggestBaseFeeInGwei) {
+		t.Errorf("gasPrice.SuggestBaseFeeInGwei empty string")
+	}
+
+	if 0 == len(gasPrice.GasUsedRatio) {
+		t.Errorf("gasPrice.GasUsedRatio empty string")
+	}
+
+}

response.go

@@ -175,3 +175,13 @@ type Log struct {
 	Removed         bool     `json:"removed"`
 }
 
+//GasPrices holds info for Gas Oracle queries
+//Gas Prices are returned in Gwei
+type GasPrices struct {
+	LastBlock            string
+	SafeGasPrice         string
+	ProposeGasPrice      string
+	FastGasPrice         string
+	SuggestBaseFeeInGwei string `json:"suggestBaseFee"`
+	GasUsedRatio         string `json:"gasUsedRatio"`
+}