option -v for walker.pl

bin/walker.pl

@@ -5,7 +5,8 @@ use warnings;
 use IO::File;
 use Math::BigInt;
 use Carp;
-$Carp::Verbose = 1;
+$Carp::Verbose  =   1;
+my  $verbose    =   0;
 
 die "\$BFAHOME not set. Did you source bfa/bin/env ?\n"
   unless exists $ENV{BFAHOME};
@@ -332,6 +333,12 @@ my $nonce_xlate = {
     '0xffffffffffffffff' => 'SEALER_ADD',
 };
 
+while ( $ARGV[0] =~ m/^-/ )
+{
+    my $arg     =   shift;
+    $verbose    =   1   if $arg eq '-v';
+}
+
 $| = 1;
 mkdir 'cache';
 my $number  =   shift || tools::cat 'walker.block.last' || 'earliest';
@@ -374,4 +381,5 @@ while ( 1 )
     printf "\r%s%c[J", $txt, 27 if $txt ne '';
 #$block->signature;
     $number     =   $block->number + 1;
+    print "\n" if $verbose;
 }