[Wallet] Add simplest BIP32/deterministic key generation implementation

src/wallet/walletdb.cpp

@@ -598,6 +598,16 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
                 return false;
             }
         }
+        else if (strType == "hdchain")
+            {
+            CHDChain chain;
+            ssValue >> chain;
+            if (!pwallet->SetHDChain(chain, true))
+            {
+            	strErr = "Error reading wallet database: SetHDChain failed";
+                return false;
+            }
+        }
     } catch (...)
     {
         return false;
@@ -998,6 +1008,12 @@ bool CWalletDB::WriteDestData(const std::string &address, const std::string &key
     return Write(std::make_pair(std::string("destdata"), std::make_pair(address, key)), value);
 }
 
+bool CWalletDB::WriteHDChain(const CHDChain& chain)
+{
+    nWalletDBUpdated++;
+    return Write(std::string("hdchain"), chain);
+}
+
 bool CWalletDB::EraseDestData(const std::string &address, const std::string &key)
 {
     nWalletDBUpdated++;