diff --git a/tools/test_modules/m29800.pm b/tools/test_modules/m29800.pm
new file mode 100644
index 000000000..96cc43c35
--- /dev/null
+++ b/tools/test_modules/m29800.pm
@@ -0,0 +1,135 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Crypt::ScryptKDF qw (scrypt_raw);
+use Encode;
+use Crypt::CBC;
+
+sub module_constraints { [[0, 256], [8, 8], [-1, -1], [-1, -1], [-1, -1]] }
+
+my $SCRYPT_N = 32768;
+my $SCRYPT_R =     8;
+my $SCRYPT_P =     6;
+
+my $DATA_FIXED = "\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10";
+
+sub module_generate_hash
+{
+  my $word = shift;
+  my $salt = shift;
+  my $iv   = shift // random_bytes (16);
+  my $data = shift;
+
+  my $word_utf16be = encode ('UTF-16BE', $word);
+
+  my $key = scrypt_raw ($word_utf16be, $salt, $SCRYPT_N, $SCRYPT_R, $SCRYPT_P, 32);
+
+  my $aes_cbc = Crypt::CBC->new ({
+    cipher      => "Crypt::Rijndael",
+    iv          => $iv,
+    key         => $key,
+    keysize     => 32,
+    literal_key => 1,
+    header      => "none",
+    padding     => "none"
+  });
+
+  my $data_block = "";
+
+  if (defined ($data)) # verify
+  {
+    my $data_dec = $aes_cbc->decrypt ($data);
+
+    if ($data_dec eq $DATA_FIXED)
+    {
+      $data_block = $data;
+    }
+  }
+  else
+  {
+    $data = $DATA_FIXED;
+
+    $data_block = $aes_cbc->encrypt ($data);
+  }
+
+  my $hash = sprintf ("\$bisq\$3*%d*%d*%d*%s*%s", $SCRYPT_N, $SCRYPT_R, $SCRYPT_P, unpack ("H*", $salt), unpack ("H*", $iv . $data_block));
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  return unless (substr ($line, 0, 8) eq '$bisq$3*');
+
+  # split hash and word:
+
+  my $idx1 = index ($line, ":", 12);
+
+  return if ($idx1 < 1);
+
+  my $hash = substr ($line,  0, $idx1);
+  my $word = substr ($line, $idx1 + 1);
+
+  # scrypt parameters:
+
+  my $idx2 = index ($hash, "*", 12);
+
+  return if ($idx2 < 0);
+
+  my $scrypt_n = substr ($hash, 12, $idx2 - 12);
+
+  $idx1 = index ($hash, "*", $idx2 + 1);
+
+  return if ($idx1 < 0);
+
+  my $scrypt_r = substr ($hash, $idx2 + 1, $idx1 - $idx2 - 1);
+
+  $idx2 = index ($hash, "*", $idx1 + 1);
+
+  return if ($idx2 < 0);
+
+  my $scrypt_p = substr ($hash, $idx1 + 1, $idx2 - $idx1 - 1);
+
+  # salt:
+
+  $idx1 = index ($hash, "*", $idx2 + 1);
+
+  return if ($idx1 < 0);
+
+  my $salt = substr ($hash, $idx2 + 1, $idx1 - $idx2 - 1);
+
+  # IV:
+
+  my $iv = substr ($hash, $idx1 + 1, 32);
+
+  # data:
+
+  my $data = substr ($hash, $idx1 + 1 + 32, 32);
+
+  return unless $salt =~ m/^[0-9a-fA-F]{16}$/;
+  return unless $iv   =~ m/^[0-9a-fA-F]{32}$/;
+  return unless $data =~ m/^[0-9a-fA-F]{32}$/;
+
+  # hex to binary/raw:
+
+  $salt   = pack ("H*", $salt);
+  $iv     = pack ("H*", $iv);
+  $data   = pack ("H*", $data);
+
+  $word = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word, $salt, $iv, $data);
+
+  return ($new_hash, $word);
+}
+
+1;