Print more diagnostic info for the various DB_CORRUPT conditions

src/db.cpp

@@ -774,7 +774,10 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
         // Get cursor
         Dbc* pcursor = GetCursor();
         if (!pcursor)
+        {
+            printf("Error getting wallet database cursor\n");
             return DB_CORRUPT;
+        }
 
         loop
         {
@@ -785,7 +788,10 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
             if (ret == DB_NOTFOUND)
                 break;
             else if (ret != 0)
+            {
+                printf("Error reading next record from wallet database\n");
                 return DB_CORRUPT;
+            }
 
             // Unserialize
             // Taking advantage of the fact that pair serialization
@@ -856,21 +862,40 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
                     ssValue >> pkey;
                     key.SetPubKey(vchPubKey);
                     key.SetPrivKey(pkey);
-                    if (key.GetPubKey() != vchPubKey || !key.IsValid())
+                    if (key.GetPubKey() != vchPubKey)
+                    {
+                        printf("Error reading wallet database: CPrivKey pubkey inconsistency\n");
                         return DB_CORRUPT;
                     }
+                    if (!key.IsValid())
+                    {
+                        printf("Error reading wallet database: invalid CPrivKey\n");
+                        return DB_CORRUPT;
+                    }
+                }
                 else
                 {
                     CWalletKey wkey;
                     ssValue >> wkey;
                     key.SetPubKey(vchPubKey);
                     key.SetPrivKey(wkey.vchPrivKey);
-                    if (key.GetPubKey() != vchPubKey || !key.IsValid())
+                    if (key.GetPubKey() != vchPubKey)
+                    {
+                        printf("Error reading wallet database: CWalletKey pubkey inconsistency\n");
+                        return DB_CORRUPT;
+                    }
+                    if (!key.IsValid())
+                    {
+                        printf("Error reading wallet database: invalid CWalletKey\n");
                         return DB_CORRUPT;
                     }
+                }
                 if (!pwallet->LoadKey(key))
+                {
+                    printf("Error reading wallet database: LoadKey failed\n");
                     return DB_CORRUPT;
                 }
+            }
             else if (strType == "mkey")
             {
                 unsigned int nID;
@@ -878,7 +903,10 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
                 CMasterKey kMasterKey;
                 ssValue >> kMasterKey;
                 if(pwallet->mapMasterKeys.count(nID) != 0)
+                {
+                    printf("Error reading wallet database: duplicate CMasterKey id %u\n", nID);
                     return DB_CORRUPT;
+                }
                 pwallet->mapMasterKeys[nID] = kMasterKey;
                 if (pwallet->nMasterKeyMaxID < nID)
                     pwallet->nMasterKeyMaxID = nID;
@@ -890,7 +918,10 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
                 vector<unsigned char> vchPrivKey;
                 ssValue >> vchPrivKey;
                 if (!pwallet->LoadCryptedKey(vchPubKey, vchPrivKey))
+                {
+                    printf("Error reading wallet database: LoadCryptedKey failed\n");
                     return DB_CORRUPT;
+                }
                 fIsEncrypted = true;
             }
             else if (strType == "defaultkey")
@@ -924,9 +955,12 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
                 CScript script;
                 ssValue >> script;
                 if (!pwallet->LoadCScript(script))
+                {
+                    printf("Error reading wallet database: LoadCScript failed\n");
                     return DB_CORRUPT;
                 }
             }
+        }
         pcursor->close();
     }