addresses.go

package main

import (
	"bufio"
	"fmt"
	"log"
	"os"

	"github.com/btcsuite/btcutil/base58"
)

func main() {
	addressFile, err := os.Open("addresses.txt")
	if err != nil {
		log.Fatal(err)
	}
	addresses := bufio.NewScanner(addressFile)

	outputFile, err := os.OpenFile("ripemd160.txt", os.O_RDWR|os.O_CREATE, 0755)
	if err != nil {
		log.Fatal(err)
	}

	for addresses.Scan() {
		address := addresses.Text()
		ripemd160, _, err := base58.CheckDecode(address)
		if err != nil {
			fmt.Printf("Failed to decode address %s: %s\n", address, err)
			continue
		}

		result := fmt.Printf("%s: %x\n", address, ripemd160)
		_, err := outputFile.WriteString(result)
		if err != nil {
			log.Fatalf("Error writing to file: %s", err)
		}
	}

	if err := outputFile.Close(); err != nil {
		log.Fatal(err)
	}
}

/addresses.go:32:10: assignment mismatch: 1 variable but fmt.Printf returns 2 values
./addresses.go:33:10: no new variables on left side of :=