Merge pull request #62 from everFinance/feature/add-arns

feat(): add arns sdk

Author: zyjblockchain

arns/arns.go

@@ -0,0 +1,141 @@
+package arns
+
+import (
+	"errors"
+	"fmt"
+	"github.com/tidwall/gjson"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type ArNS struct {
+	DreUrl      string
+	ArNSAddress string
+	HttpClient  *http.Client
+}
+
+func NewArNS(dreUrl string, arNSAddr string, timout time.Duration) *ArNS {
+
+	// default timeout is 5s
+	if timout == 0 {
+		timout = 5 * time.Second
+	}
+
+	httpClient := &http.Client{
+		Timeout: timout, // Set the timeout for HTTP requests
+	}
+	return &ArNS{
+		DreUrl:      dreUrl,
+		ArNSAddress: arNSAddr,
+		HttpClient:  httpClient,
+	}
+}
+
+func (a *ArNS) QueryLatestRecord(domain string) (txId string, err error) {
+	spliteDomains := strings.Split(domain, "_")
+	if len(spliteDomains) > 2 { // todo now only support level-2 subdomain
+		return "", errors.New("current arseeding gw not support over level-2 subdomain")
+	}
+	rootDomain := spliteDomains[len(spliteDomains)-1]
+	// step1 query NameCA address
+	caAddress, err := a.QueryNameCa(rootDomain)
+	if err != nil {
+		return "", err
+	}
+	// step2 query latest txId
+	// Currently, only level-1 domain name resolution is queried
+	subdomain := spliteDomains[0]
+	if subdomain == rootDomain {
+		subdomain = "@"
+	}
+	txId, err = a.GetArNSTxID(caAddress, subdomain)
+	return
+}
+
+func (a *ArNS) QueryNameCa(domain string) (caAddress string, err error) {
+	baseURL := a.DreUrl + "/contract/"
+
+	// Construct the complete URL
+	url := baseURL + "?id=" + a.ArNSAddress
+
+	// Make the HTTP request using the custom HTTP client
+	response, err := a.HttpClient.Get(url)
+	if err != nil {
+		return "", err
+	}
+	defer response.Body.Close()
+
+	// Check the response status code
+	if response.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("unexpected response status: %s", response.Status)
+	}
+
+	// Read the response body
+	body, err := ioutil.ReadAll(response.Body)
+	if err != nil {
+		return "", err
+	}
+
+	value := gjson.Get(string(body), "state.records."+domain+".contractTxId")
+
+	if !value.Exists() {
+		return "", fmt.Errorf("domain %s not exist", domain)
+	}
+
+	return value.String(), nil
+
+}
+
+func (a *ArNS) GetArNSTxID(caAddress string, domain string) (txId string, err error) {
+
+	baseURL := a.DreUrl + "/contract/"
+
+	// Construct the complete URL
+	url := baseURL + "?id=" + caAddress
+
+	// Make the HTTP request using the custom HTTP client
+	response, err := a.HttpClient.Get(url)
+	if err != nil {
+		return "", err
+	}
+	defer response.Body.Close()
+
+	// Check the response status code
+	if response.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("GetArNSTxID: unexpected response status: %s", response.Status)
+	}
+
+	// Read the response body
+	body, err := ioutil.ReadAll(response.Body)
+	if err != nil {
+		return "", err
+	}
+
+	value := gjson.Get(string(body), "state.records."+domain+".transactionId")
+
+	/** The ArNS interface will return two types of data for compatibility processing
+	data type 1: https://dre-1.warp.cc/contract?id=jr4P6Y_Olv3QGho0uo7p9DpvSn33mUC_XgJSKB3JDZ4
+	records:{
+	@:{
+	transactionId:"wQk7txuMvlrlYlVozj6aeF7E9dlwar8nNtfs3iNTpbQ"
+	ttlSeconds:900
+	}
+	}
+	data type 2: https://dre-3.warp.cc/contract?id=Vx4bW_bh7nXMyq-Jy24s9EiCyY_BXZuToshhSqabc9o
+	records:{
+	@:"wQk7txuMvlrlYlVozj6aeF7E9dlwar8nNtfs3iNTpbQ"
+	}
+	*/
+	if !value.Exists() {
+		value = gjson.Get(string(body), "state.records."+domain)
+	}
+
+	if !value.Exists() {
+		return "", fmt.Errorf("GetArNSTxID: domain %s not exist", domain)
+	}
+
+	return value.String(), nil
+
+}