Parameters

from

string

REQUIRED

The address that is initiating the transaction

contractAddress

string

REQUIRED

The address of the smart contract

method

string

REQUIRED

The method name to call on the contract

jsonString

string

REQUIRED

The method parameters in JSON format

tAmount

integer

REQUIRED

The amount of TRX to send with the transaction

tTokenID

string

REQUIRED

The ID of the TRC10 token to send

tTokenAmount

integer

REQUIRED

The amount of TRC10 token to send

Returns

result

object

The result of the energy estimation

result

boolean

Whether the estimation was successful

code

string

The response code (enum: ReturnResponseCode)

message

string

The response message

energy_required

integer

The estimated amount of energy required for the transaction

Request

1
package main
2

3
import (
4
   "context"
5
   "crypto/tls"
6
   "encoding/json"
7
   "fmt"
8
   "github.com/fbsobreira/gotron-sdk/pkg/client"
9
   "google.golang.org/grpc"
10
   "google.golang.org/grpc/credentials"
11
)
12

13
// Quicknode endpoints consist of two crucial components: the endpoint name and the corresponding token
14
// For eg: QN Endpoint: https://docs-demo.tron-mainnet.quiknode.pro/abcde123456789
15
// endpoint will be: docs-demo.tron-mainnet.quiknode.pro:50051  {50051 is the port number for Tron gRPC}
16
// token will be : abcde123456789
17

18
var token = "YOUR_TOKEN"
19
var endpoint = "YOUR_ENDPOINT:50051"
20

21
type auth struct {
22
   token string
23
}
24

25
func (a *auth) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
26
   return map[string]string{
27
      "x-token": a.token,
28
   }, nil
29
}
30

31
func (a *auth) RequireTransportSecurity() bool {
32
   return false
33
}
34

35
func main() {
36

37
   opts := []grpc.DialOption{
38
      grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})),
39
      grpc.WithPerRPCCredentials(&auth{token}),
40
   }
41
   conn := client.NewGrpcClient(endpoint)
42
   if err := conn.Start(opts...); err != nil {
43
      panic(err)
44
   }
45
   defer conn.Conn.Close()
46

47
   from := "TTGhREx2pDSxFX555NWz1YwGpiBVPvQA7e"
48
   contractAddress := "TVSvjZdyDSNocHm7dP3jvCmMNsCnMTPa5W"
49
   method := "transfer(address,uint256)"
50
   jsonString := `[{"address": "TE4c73WubeWPhSF1nAovQDmQytjcaLZyY9"},{"uint256": "100"}]`
51
   tAmount := int64(0)
52
   tTokenID := ""
53
   tTokenAmount := int64(0)
54

55
   fmt.Println("Estimating energy for contract call...")
56
   
57
   energy, err := conn.EstimateEnergy(
58
      from,            // Caller's address
59
      contractAddress, // Contract address
60
      method,          // Function selector
61
      jsonString,      // Parameters in JSON format
62
      tAmount,         // TRX value to send
63
      tTokenID,        // Token ID (if applicable)
64
      tTokenAmount,    // Token value (if applicable)
65
   )
66
   
67
   if err != nil {
68
      fmt.Printf("Error estimating energy: %v\n", err)
69
      return
70
   }
71
   
72
   fmt.Println("Energy estimation successful! Results:")
73
   jsonData, _ := json.MarshalIndent(energy, "", "  ")
74
   fmt.Println(string(jsonData))
75
   
76
   if !energy.Result.Result {
77
      fmt.Println("Energy estimation failed!")
78
      if len(energy.Result.Message) > 0 {
79
         fmt.Printf("Error message: %s\n", energy.Result.Message)
80
      }
81
      return
82
   }
83
   
84
   energyRequired := energy.EnergyRequired
85
   energyBuffer := energyRequired / 5 // Add 20% buffer
86
   recommendedFeeLimit := (energyRequired + energyBuffer) * 420
87
   
88
   fmt.Printf("\nEstimated energy required: %d\n", energyRequired)
89
   fmt.Printf("Recommended fee limit (with 20%% buffer): %d SUN\n", recommendedFeeLimit)
90
   fmt.Println("\nYou can use this fee limit when making the actual transaction.")
91
}

1
package main
2

3
import (
4
   "context"
5
   "crypto/tls"
6
   "encoding/json"
7
   "fmt"
8
   "github.com/fbsobreira/gotron-sdk/pkg/client"
9
   "google.golang.org/grpc"
10
   "google.golang.org/grpc/credentials"
11
)
12

13
// Quicknode endpoints consist of two crucial components: the endpoint name and the corresponding token
14
// For eg: QN Endpoint: https://docs-demo.tron-mainnet.quiknode.pro/abcde123456789
15
// endpoint will be: docs-demo.tron-mainnet.quiknode.pro:50051  {50051 is the port number for Tron gRPC}
16
// token will be : abcde123456789
17

18
var token = "YOUR_TOKEN"
19
var endpoint = "YOUR_ENDPOINT:50051"
20

21
type auth struct {
22
   token string
23
}
24

25
func (a *auth) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
26
   return map[string]string{
27
      "x-token": a.token,
28
   }, nil
29
}
30

31
func (a *auth) RequireTransportSecurity() bool {
32
   return false
33
}
34

35
func main() {
36

37
   opts := []grpc.DialOption{
38
      grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})),
39
      grpc.WithPerRPCCredentials(&auth{token}),
40
   }
41
   conn := client.NewGrpcClient(endpoint)
42
   if err := conn.Start(opts...); err != nil {
43
      panic(err)
44
   }
45
   defer conn.Conn.Close()
46

47
   from := "TTGhREx2pDSxFX555NWz1YwGpiBVPvQA7e"
48
   contractAddress := "TVSvjZdyDSNocHm7dP3jvCmMNsCnMTPa5W"
49
   method := "transfer(address,uint256)"
50
   jsonString := `[{"address": "TE4c73WubeWPhSF1nAovQDmQytjcaLZyY9"},{"uint256": "100"}]`
51
   tAmount := int64(0)
52
   tTokenID := ""
53
   tTokenAmount := int64(0)
54

55
   fmt.Println("Estimating energy for contract call...")
56
   
57
   energy, err := conn.EstimateEnergy(
58
      from,            // Caller's address
59
      contractAddress, // Contract address
60
      method,          // Function selector
61
      jsonString,      // Parameters in JSON format
62
      tAmount,         // TRX value to send
63
      tTokenID,        // Token ID (if applicable)
64
      tTokenAmount,    // Token value (if applicable)
65
   )
66
   
67
   if err != nil {
68
      fmt.Printf("Error estimating energy: %v\n", err)
69
      return
70
   }
71
   
72
   fmt.Println("Energy estimation successful! Results:")
73
   jsonData, _ := json.MarshalIndent(energy, "", "  ")
74
   fmt.Println(string(jsonData))
75
   
76
   if !energy.Result.Result {
77
      fmt.Println("Energy estimation failed!")
78
      if len(energy.Result.Message) > 0 {
79
         fmt.Printf("Error message: %s\n", energy.Result.Message)
80
      }
81
      return
82
   }
83
   
84
   energyRequired := energy.EnergyRequired
85
   energyBuffer := energyRequired / 5 // Add 20% buffer
86
   recommendedFeeLimit := (energyRequired + energyBuffer) * 420
87
   
88
   fmt.Printf("\nEstimated energy required: %d\n", energyRequired)
89
   fmt.Printf("Recommended fee limit (with 20%% buffer): %d SUN\n", recommendedFeeLimit)
90
   fmt.Println("\nYou can use this fee limit when making the actual transaction.")
91
}

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