fix: json unmarshal with string

client.go

@@ -166,13 +166,15 @@ func (c *Client) call(module, action string, param map[string]interface{}, outco
 		return
 	}
 
+	fixedContent := bytes.ReplaceAll(content.Bytes(), []byte(`"transactionIndex":""`), []byte(`"transactionIndex":"0"`))
+
 	var envelope Envelope
-	err = json.Unmarshal(content.Bytes(), &envelope)
+	err = json.Unmarshal(fixedContent, &envelope)
 	if err != nil {
 		err = wrapErr(err, "json unmarshal envelope")
 		return
 	}
-	if envelope.Status != 1 {
+	if envelope.Status != "1" {
 		err = fmt.Errorf("etherscan server: %s", envelope.Message)
 		return
 	}

contract.go

@@ -26,3 +26,12 @@ func (c *Client) ContractSource(address string) (source []ContractSource, err er
 	err = c.call("contract", "getsourcecode", param, &source)
 	return
 }
+
+func (c *Client) ContractCreation(address string) (creation []ContractCreation, err error) {
+	param := M{
+		"contractaddresses": address,
+	}
+
+	err = c.call("contract", "getcontractcreation", param, &creation)
+	return
+}

contract_e2e_test.go

@@ -8,6 +8,7 @@
 package etherscan
 
 import (
+	"strings"
 	"testing"
 )
 
@@ -38,3 +39,18 @@ func TestClient_ContractSource(t *testing.T) {
 		t.Fatalf("api.ContractSource not working, content match failed, got\n%+v", s)
 	}
 }
+
+func TestClient_ContractCreation(t *testing.T) {
+	creation, err := api.ContractCreation("0xBB9bc244D798123fDe783fCc1C72d3Bb8C189413")
+	noError(t, err, "api.ContractCreation")
+
+	if len(creation) != 1 {
+		t.Fatalf("api.ContractCreation not working, got len %v, expect 1", len(creation))
+	}
+	c := creation[0]
+	if !strings.EqualFold(c.ContractCreator, "0x793ea9692Ada1900fBd0B80FFFEc6E431fe8b391") ||
+		c.BlockNumber != 1428757 ||
+		c.TxHash != "0xe9ebfecc2fa10100db51a4408d18193b3ac504584b51a4e55bdef1318f0a30f9" {
+		t.Fatalf("api.ContractCreation not working, content match failed, got\n%+v", c)
+	}
+}

response.go

@@ -17,7 +17,7 @@ import (
 // Envelope is the carrier of nearly every response
 type Envelope struct {
 	// 1 for good, 0 for error
-	Status int `json:"status,string"`
+	Status json.Number `json:"status"`
 	// OK for good, other words when Status equals 0
 	Message string `json:"message"`
 	// where response lies
@@ -166,6 +166,17 @@ type ContractSource struct {
 	SwarmSource          string `json:"SwarmSource"`
 }
 
+// ContractCreation holds info from query for contract creation
+type ContractCreation struct {
+	ContractAddress  string `json:"contractAddress"`
+	ContractCreator  string `json:"contractCreator"`
+	TxHash           string `json:"txHash"`
+	BlockNumber      int    `json:"blockNumber,string"`
+	Timestamp        Time   `json:"timestamp"`
+	ContractFactory  string `json:"contractFactory"`
+	CreationBytecode string `json:"creationBytecode"`
+}
+
 // ExecutionStatus holds info from query for transaction execution status
 type ExecutionStatus struct {
 	// 0 = pass, 1 = error
@@ -200,6 +211,7 @@ type Log struct {
 	Topics          []string `json:"topics"`
 	Data            string   `json:"data"`
 	BlockNumber     string   `json:"blockNumber"`
+	Timestamp       string   `json:"timeStamp"`
 	TransactionHash string   `json:"transactionHash"`
 	BlockHash       string   `json:"blockHash"`
 	LogIndex        string   `json:"logIndex"`

setup_e2e_test.go

@@ -32,7 +32,10 @@ func init() {
 	}
 	bucket = NewBucket(500 * time.Millisecond)
 
-	api = New(Mainnet, apiKey)
+	api = NewCustomized(Customization{
+		BaseURL: "https://api.etherscan.io/v2/api?chainid=1&",
+		Key:     apiKey,
+	})
 	api.Verbose = true
 	api.BeforeRequest = func(module string, action string, param map[string]interface{}) error {
 		bucket.Take()