include tron token info on validation (#84)

validation/info/external/external.go

@@ -35,6 +35,10 @@ func GetTokenInfo(tokenID, tokentType string) (*TokenInfo, error) {
 		return GetTokenInfoByScraping(fmt.Sprintf("https://snowtrace.io/token/%s", tokenID))
 	case "spl":
 		return GetTokenInfoForSPL(tokenID)
+	case "trc20":
+		return GetTokenInfoForTRC20(tokenID)
+	case "trc10":
+		return GetTokenInfoForTRC10(tokenID)
 	}
 
 	return nil, nil

validation/info/external/trc10.go

@@ -0,0 +1,38 @@
+package external
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/trustwallet/assets-go-libs/http"
+)
+
+const trc10APIURL = "https://apilist.tronscan.io/api/token?id=%s"
+
+type TRC10TokensResponse struct {
+	Data []struct {
+		Symbol       string `json:"abbr"`
+		Decimals     int    `json:"precision"`
+		HoldersCount int    `json:"nrOfTokenHolders"`
+	} `json:"data"`
+}
+
+func GetTokenInfoForTRC10(tokenID string) (*TokenInfo, error) {
+	url := fmt.Sprintf(trc10APIURL, tokenID)
+
+	var res TRC10TokensResponse
+	err := http.GetHTTPResponse(url, &res)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(res.Data) == 0 {
+		return nil, errors.New("not found")
+	}
+
+	return &TokenInfo{
+		Symbol:       res.Data[0].Symbol,
+		Decimals:     res.Data[0].Decimals,
+		HoldersCount: res.Data[0].HoldersCount,
+	}, nil
+}

validation/info/external/trc20.go

@@ -0,0 +1,38 @@
+package external
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/trustwallet/assets-go-libs/http"
+)
+
+const trc20APIURL = "https://apilist.tronscan.io/api/token_trc20?contract=%s"
+
+type TRC20TokensResponse struct {
+	TRC20Tokens []struct {
+		Symbol       string `json:"symbol"`
+		Decimals     int    `json:"decimals"`
+		HoldersCount int    `json:"holders_count"`
+	} `json:"trc20_tokens"`
+}
+
+func GetTokenInfoForTRC20(tokenID string) (*TokenInfo, error) {
+	url := fmt.Sprintf(trc20APIURL, tokenID)
+
+	var res TRC20TokensResponse
+	err := http.GetHTTPResponse(url, &res)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(res.TRC20Tokens) == 0 {
+		return nil, errors.New("not found")
+	}
+
+	return &TokenInfo{
+		Symbol:       res.TRC20Tokens[0].Symbol,
+		Decimals:     res.TRC20Tokens[0].Decimals,
+		HoldersCount: res.TRC20Tokens[0].HoldersCount,
+	}, nil
+}