Added binary codec base58 as well as improving the help for --binary-codec flag (#548)

* Added binary codec `base58` as well as improving the help for `--binary-codec` flag
* Added tests for base58
* Fixed tests

Co-authored-by: Matthieu Vachon <matt@streamingfast.io>

pkg/client/codec.go

@@ -4,11 +4,14 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"fmt"
+
+	"github.com/mr-tron/base58"
 )
 
 const (
 	CodecNone   = "none"
 	CodecHex    = "hex"
+	CodecBase58 = "base58"
 	CodecBase64 = "base64"
 )
 
@@ -19,7 +22,7 @@ var (
 
 func SetBinaryCodec(codec string) error {
 	switch codec {
-	case CodecNone, CodecHex, CodecBase64:
+	case CodecNone, CodecHex, CodecBase58, CodecBase64:
 		BinaryCodec = codec
 	default:
 		return fmt.Errorf("invalid binary codec: %v", codec)
@@ -32,6 +35,8 @@ func encodeBinaryData(data []byte, codec string) string {
 	switch codec {
 	case CodecHex:
 		return hex.EncodeToString(data)
+	case CodecBase58:
+		return base58.Encode(data)
 	case CodecBase64:
 		return base64.StdEncoding.EncodeToString(data)
 	default: