replace Fatalf function with fmt.Errorf

internal/cli/server/config.go

@@ -687,11 +687,11 @@ func (c *Config) buildEth(stack *node.Node) (*ethconfig.Config, error) {
  } else {
  developer, err = ks.NewAccount(passphrase)
  if err != nil {
- Fatalf("Failed to create developer account: %v", err)
+ return nil, fmt.Errorf("failed to create developer account: %v", err)
  }
  }
  if err := ks.Unlock(developer, passphrase); err != nil {
- Fatalf("Failed to unlock developer account: %v", err)
+ return nil, fmt.Errorf("failed to unlock developer account: %v", err)
  }
  log.Info("Using developer account", "address", developer.Address)
 

internal/cli/server/server.go

@@ -7,7 +7,6 @@ import (
  "net"
  "net/http"
  "os"
- "runtime"
  "strings"
  "time"
 
@@ -285,23 +284,3 @@ func setupLogger(logLevel string) {
  }
  log.Root().SetHandler(glogger)
 }
-
-// Fatalf formats a message to standard error and exits the program.
-// The message is also printed to standard output if standard error
-// is redirected to a different file.
-func Fatalf(format string, args ...interface{}) {
- w := io.MultiWriter(os.Stdout, os.Stderr)
- if runtime.GOOS == "windows" {
- // The SameFile check below doesn't work on Windows.
- // stdout is unlikely to get redirected though, so just print there.
- w = os.Stdout
- } else {
- outf, _ := os.Stdout.Stat()
- errf, _ := os.Stderr.Stat()
- if outf != nil && errf != nil && os.SameFile(outf, errf) {
- w = os.Stderr
- }
- }
- fmt.Fprintf(w, "Fatal: "+format+"\n", args...)
- os.Exit(1)
-}