From 9e470585b35a84fcb7f6aa41ac0216c117e2a5e1 Mon Sep 17 00:00:00 2001
From: Gavin Andresen <gavinandresen@gmail.com>
Date: Fri, 16 Dec 2011 18:03:48 -0500
Subject: [PATCH] Update bitcoin address numbers for latest luke-jr/sipa scheme

---
 src/base58.h   |   33 +++++++++++++++++++++++----------
 src/main.cpp   |    2 +-
 src/script.cpp |    2 +-
 3 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/src/base58.h b/src/base58.h
index 4be1198..cba638f 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -253,14 +253,26 @@ public:
 };
 
 // base58-encoded bitcoin addresses
-// Addresses have version 0 or 111 (testnet)
+// Public-key-hash-addresses have version 0 (or 192 testnet)
 // The data vector contains RIPEMD160(SHA256(pubkey)), where pubkey is the serialized public key
+// Script-hash-addresses (OP_EVAL) have version 5 (or 196 testnet)
+// The data vector contains RIPEMD160(SHA256(cscript)), where cscript is the serialized redemption script
 class CBitcoinAddress : public CBase58Data
 {
 public:
-    void SetHash160(const uint160& hash160)
+    enum
     {
-        SetData(fTestNet ? 111 : 0, &hash160, 20);
+        PUBKEY_ADDRESS = 0,
+        SCRIPT_ADDRESS = 5,
+        PUBKEY_ADDRESS_TEST = 192,
+        PUBKEY_ADDRESS_TEST_LEGACY = 111,  // Deprecated: old testnet address
+        SCRIPT_ADDRESS_TEST = 196,
+    };
+
+    bool SetHash160(const uint160& hash160)
+    {
+        SetData(fTestNet ? PUBKEY_ADDRESS_TEST : PUBKEY_ADDRESS, &hash160, 20);
+        return true;
     }
 
     void SetPubKey(const std::vector<unsigned char>& vchPubKey)
@@ -270,7 +282,7 @@ public:
 
     bool SetScriptHash160(const uint160& hash160)
     {
-        SetData(fTestNet ? 111^2 : 2, &hash160, 20);
+        SetData(fTestNet ? SCRIPT_ADDRESS_TEST : SCRIPT_ADDRESS, &hash160, 20);
         return true;
     }
 
@@ -280,20 +292,21 @@ public:
         bool fExpectTestNet = false;
         switch(nVersion)
         {
-            case 0:
+            case PUBKEY_ADDRESS:
                 nExpectedSize = 20; // Hash of public key
                 fExpectTestNet = false;
                 break;
-            case 2:
+            case SCRIPT_ADDRESS:
                 nExpectedSize = 20; // OP_EVAL, hash of CScript
                 fExpectTestNet = false;
                 break;
 
-            case 111:
+            case PUBKEY_ADDRESS_TEST_LEGACY:
+            case PUBKEY_ADDRESS_TEST:
                 nExpectedSize = 20;
                 fExpectTestNet = true;
                 break;
-            case 111^2:
+            case SCRIPT_ADDRESS_TEST:
                 nExpectedSize = 20;
                 fExpectTestNet = true;
                 break;
@@ -308,8 +321,8 @@ public:
         if (!IsValid())
             return false;
         if (fTestNet)
-            return nVersion == 111^2;
-        return nVersion == 2;
+            return nVersion == SCRIPT_ADDRESS_TEST;
+        return nVersion == SCRIPT_ADDRESS;
     }
 
     CBitcoinAddress()
diff --git a/src/main.cpp b/src/main.cpp
index 81dd76f..5db708a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -902,7 +902,7 @@ bool CTransaction::FetchInputs(CTxDB& txdb, const map<uint256, CTxIndex>& mapTes
 {
     if (IsCoinBase())
         return true; // Coinbase transactions have no inputs to fetch.
-    
+
     for (int i = 0; i < vin.size(); i++)
     {
         COutPoint prevout = vin[i].prevout;
diff --git a/src/script.cpp b/src/script.cpp
index 5487c01..467cb2f 100644
--- a/src/script.cpp
+++ b/src/script.cpp
@@ -1025,7 +1025,7 @@ bool EvalScriptInner(vector<vector<unsigned char> >& stack, const CScript& scrip
                     valtype& vchScript = stacktop(-1);
                     CScript subscript(vchScript.begin(), vchScript.end());
                     popstack(stack);
-                    
+
                     // Codeseparators not allowed; they don't make sense 'inside' an OP_EVAL, because
                     // their purpose is to change which parts of the scriptPubKey script is copied
                     // and signed by OP_CHECKSIG, but OP_EVAl'ed code is in the scriptSig, not the scriptPubKey.
-- 
1.7.1