Deduplicate the message verifying code

The logic of verifying a message was duplicated in 2 places:

src/qt/signverifymessagedialog.cpp
  SignVerifyMessageDialog::on_verifyMessageButton_VM_clicked()

src/rpc/misc.cpp
  verifymessage()

with the only difference being the result handling. Move the logic into
a dedicated

src/util/message.cpp
  MessageVerify()

which returns a set of result codes, call it from the 2 places and just
handle the results differently in the callers.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/util/validation.cpp b/src/util/validation.cpp
index 89bc6665a4..ffbee21aeb 100644
--- a/src/util/validation.cpp
+++ b/src/util/validation.cpp
@@ -21,5 +21,3 @@ std::string FormatStateMessage(const ValidationState &state)
 
     return state.GetRejectReason();
 }
-
-const std::string strMessageMagic = "Bitcoin Signed Message:\n";