Payment Protocol: X509-validated payment requests

Add support for a Payment Protocol to Bitcoin-Qt.

Payment messages are protocol-buffer encoded and communicated over
http(s), so this adds a dependency on the Google protocol buffer
library, and requires Qt with OpenSSL support.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/walletdb.cpp b/src/walletdb.cpp
index 6cfd394bd0..554d140024 100644
--- a/src/walletdb.cpp
+++ b/src/walletdb.cpp
@@ -32,6 +32,18 @@ bool CWalletDB::EraseName(const string& strAddress)
     return Erase(make_pair(string("name"), strAddress));
 }
 
+bool CWalletDB::WritePurpose(const string& strAddress, const string& strPurpose)
+{
+    nWalletDBUpdated++;
+    return Write(make_pair(string("purpose"), strAddress), strPurpose);
+}
+
+bool CWalletDB::ErasePurpose(const string& strPurpose)
+{
+    nWalletDBUpdated++;
+    return Erase(make_pair(string("purpose"), strPurpose));
+}
+
 bool CWalletDB::ReadAccount(const string& strAccount, CAccount& account)
 {
     account.SetNull();
@@ -214,6 +226,12 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
             ssKey >> strAddress;
             ssValue >> pwallet->mapAddressBook[CBitcoinAddress(strAddress).Get()].name;
         }
+        else if (strType == "purpose")
+        {
+            string strAddress;
+            ssKey >> strAddress;
+            ssValue >> pwallet->mapAddressBook[CBitcoinAddress(strAddress).Get()].purpose;
+        }
         else if (strType == "tx")
         {
             uint256 hash;