// go mod
go get github.com/iotexproject/iotex-antenna-go/v2

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/iotexproject/iotex-address/address"
	"github.com/iotexproject/iotex-antenna-go/v2/account"
	"github.com/iotexproject/iotex-antenna-go/v2/iotex"
	"github.com/iotexproject/iotex-proto/golang/iotexapi"
)

const (
	mainnetRPC     = "api.iotex.one:443"
	testnetRPC     = "api.testnet.iotex.one:443"
	mainnetChainID = 1
	testnetChainID = 2
)

func main() {
	// Create grpc connection
	conn, err := iotex.NewDefaultGRPCConn(testnetRPC)
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()

	// Add account by private key
	acc, err := account.HexStringToAccount("...")
	if err != nil {
		log.Fatal(err)
	}

	// create client
	c := iotex.NewAuthedClient(iotexapi.NewAPIServiceClient(conn), testnetChainID, acc)
	
	// send the transfer to chain
	to, err := address.FromString("io1zq5g9c5c3hqw9559ks4anptkpumxgsjfn2e4ke")
	if err != nil {
		log.Fatal(err)
	}
	hash, err := c.Transfer(to, big.NewInt(10)).SetGasPrice(big.NewInt(100000000000)).SetGasLimit(20000).Call(context.Background())
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println("transaction hash = %x\n", hash)
}