github.com/hashgraph/hedera-sdk-go/v2@v2.48.0/examples/rng_transaction/main.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  
     7  	"github.com/hashgraph/hedera-sdk-go/v2"
     8  )
     9  
    10  func main() {
    11  	var client *hedera.Client
    12  	var err error
    13  
    14  	// Retrieving network type from environment variable HEDERA_NETWORK
    15  	client, err = hedera.ClientForName(os.Getenv("HEDERA_NETWORK"))
    16  	if err != nil {
    17  		panic(fmt.Sprintf("%v : error creating client", err))
    18  	}
    19  
    20  	// Retrieving operator ID from environment variable OPERATOR_ID
    21  	operatorAccountID, err := hedera.AccountIDFromString(os.Getenv("OPERATOR_ID"))
    22  	if err != nil {
    23  		panic(fmt.Sprintf("%v : error converting string to AccountID", err))
    24  	}
    25  
    26  	// Retrieving operator key from environment variable OPERATOR_KEY
    27  	operatorKey, err := hedera.PrivateKeyFromString(os.Getenv("OPERATOR_KEY"))
    28  	if err != nil {
    29  		panic(fmt.Sprintf("%v : error converting string to PrivateKey", err))
    30  	}
    31  
    32  	// Setting the client operator ID and key
    33  	client.SetOperator(operatorAccountID, operatorKey)
    34  
    35  	createResponse, err := hedera.NewPrngTransaction().
    36  		// Set the range
    37  		SetRange(12).
    38  		Execute(client)
    39  	if err != nil {
    40  		panic(fmt.Sprintf("%v : error executing rng transaction", err))
    41  	}
    42  
    43  	transactionRecord, err := createResponse.GetRecord(client)
    44  	if err != nil {
    45  		panic(fmt.Sprintf("%v : error getting receipt", err))
    46  	}
    47  	fmt.Printf("transactionRecord: %v\n", transactionRecord)
    48  	if transactionRecord.PrngNumber == nil {
    49  		panic(fmt.Sprintf("%v : error, pseudo-random number is nil", err))
    50  	}
    51  
    52  	println("The pseudo-random number is:", *transactionRecord.PrngNumber)
    53  }