package main
import (
"context"
"crypto/tls"
"fmt"
"encoding/hex"
"github.com/fbsobreira/gotron-sdk/pkg/client"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
// QuickNode endpoints consist of two crucial components: the endpoint name and the corresponding token
// For eg: QN Endpoint: https://docs-demo.tron-mainnet.quiknode.pro/abcde123456789
// endpoint will be: docs-demo.tron-mainnet.quiknode.pro:50051 {50051 is the port number for Tron gRPC}
// token will be : abcde123456789
var token = "YOUR_TOKEN"
var endpoint = "YOUR_ENDPOINT:50051"
type auth struct {
token string
}
func (a *auth) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
return map[string]string{
"x-token": a.token,
}, nil
}
func (a *auth) RequireTransportSecurity() bool {
return false
}
func main() {
opts := []grpc.DialOption{
grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})),
grpc.WithPerRPCCredentials(&auth{token}),
}
conn := client.NewGrpcClient(endpoint)
if err := conn.Start(opts...); err != nil {
panic(err)
}
defer conn.Conn.Close()
ownerAddress := "THPvaUhoh2Qn2y9THCZML3H815hhFhn5YC"
contractAddress := "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t"
method := "totalSupply()"
jsonParams := ""
response, err := conn.TriggerConstantContract(
ownerAddress,
contractAddress,
method,
jsonParams,
)
if err != nil {
fmt.Printf("Error calling TriggerConstantContract: %v\n", err)
return
}
if len(response.ConstantResult) == 0 {
fmt.Println("No result returned from contract call")
return
}
hexData := hex.EncodeToString(response.ConstantResult[0])
numericValue, err := conn.ParseTRC20NumericProperty(hexData)
if err != nil {
fmt.Printf("Error parsing numeric property: %v\n", err)
return
}
fmt.Printf("Parsed numeric value: %s\n", numericValue.String())
}