Go Quickstart

mkdir hedera-quickstart && cd hedera-quickstart
go mod init hedera-quickstart
go get github.com/hiero-ledger/hiero-sdk-go/v2@latest
go get github.com/joho/godotenv

OPERATOR_ID=0.0.1234
OPERATOR_KEY=302d300706052b8104000a032200033456...

package main

import (
    "fmt"
    "log"
    "os"

    hedera "github.com/hiero-ledger/hiero-sdk-go/v2/sdk"
    "github.com/joho/godotenv"
)

func main() {
    if err := godotenv.Load(); err != nil {
        log.Fatalf("failed to load .env: %v", err)
    }

    operatorID, err := hedera.AccountIDFromString(os.Getenv("OPERATOR_ID"))
    if err != nil {
        log.Fatalf("bad OPERATOR_ID: %v", err)
    }

    operatorKey, err := hedera.PrivateKeyFromString(os.Getenv("OPERATOR_KEY"))
    if err != nil {
        log.Fatalf("bad OPERATOR_KEY: %v", err)
    }

    // Connect to testnet with the operator as the default payer.
    client := hedera.ClientForTestnet()
    client.SetOperator(operatorID, operatorKey)

    // 1. Query the operator's balance.
    balance, err := hedera.NewAccountBalanceQuery().
        SetAccountID(operatorID).
        Execute(client)
    if err != nil {
        log.Fatalf("balance query failed: %v", err)
    }
    fmt.Printf("Operator balance: %v\n", balance.Hbars)

    // 2. Transfer 1 HBAR to account 0.0.3.
    recipient, _ := hedera.AccountIDFromString("0.0.3")
    response, err := hedera.NewTransferTransaction().
        AddHbarTransfer(operatorID, hedera.HbarFrom(-1, hedera.HbarUnits.Hbar)).
        AddHbarTransfer(recipient, hedera.HbarFrom(1, hedera.HbarUnits.Hbar)).
        Execute(client)
    if err != nil {
        log.Fatalf("transfer failed: %v", err)
    }

    receipt, err := response.GetReceipt(client)
    if err != nil {
        log.Fatalf("receipt failed: %v", err)
    }

    fmt.Printf("Transfer status: %s\n", receipt.Status)
    fmt.Printf("Transaction ID: %s\n", response.TransactionID)
}

go run main.go

Operator balance: 10000 ℏ
Transfer status: SUCCESS
Transaction ID: 0.0.1234@1700000000.123456789

https://hashscan.io/testnet/transaction/<transactionId>