From 6dfe15ed2e26ff99e513ffedeaaac3f4fe2846cc Mon Sep 17 00:00:00 2001
From: Anthony Fieroni <bvbfan@abv.bg>
Date: Fri, 13 Dec 2019 18:06:11 +0200
Subject: [PATCH] Fix signed / unsigned compare

Signed-off-by: Anthony Fieroni <bvbfan@abv.bg>
---
 src/claimtrie/sqlite.h | 4 ++--
 src/txdb.h             | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/claimtrie/sqlite.h b/src/claimtrie/sqlite.h
index 8fda04ac7..f309ae822 100644
--- a/src/claimtrie/sqlite.h
+++ b/src/claimtrie/sqlite.h
@@ -42,7 +42,7 @@ namespace sqlite
         auto ptr = sqlite3_column_blob(stmt, inx);
         if (!ptr) return ret;
         int bytes = sqlite3_column_bytes(stmt, inx);
-        assert(bytes <= ret.size());
+        assert(bytes > 0 && bytes <= int(ret.size()));
         std::memcpy(ret.begin(), ptr, bytes);
         return ret;
     }
@@ -52,7 +52,7 @@ namespace sqlite
         auto ptr = sqlite3_column_blob(stmt, inx);
         if (!ptr) return ret;
         int bytes = sqlite3_column_bytes(stmt, inx);
-        assert(bytes <= ret.size());
+        assert(bytes > 0 && bytes <= int(ret.size()));
         std::memcpy(ret.begin(), ptr, bytes);
         return ret;
     }
diff --git a/src/txdb.h b/src/txdb.h
index 5f41258b7..a70ab9155 100644
--- a/src/txdb.h
+++ b/src/txdb.h
@@ -44,6 +44,7 @@ namespace sqlite {
         auto ptr = (const unsigned char*)sqlite3_column_blob(stmt, inx);
         if (!ptr) return {};
         int bytes = sqlite3_column_bytes(stmt, inx);
+        assert(bytes >= 0);
         return CScript(ptr, ptr + bytes);
     }
 
@@ -62,7 +63,7 @@ namespace sqlite {
         uint256 ret;
         if (!ptr) return ret;
         int bytes = sqlite3_column_bytes(stmt, inx);
-        assert(bytes <= ret.size());
+        assert(bytes > 0 && bytes <= int(ret.size()));
         std::memcpy(ret.begin(), ptr, bytes);
         return ret;
     }