From 3dd410294d42f251e4808ef1dfcfcd64817edbac Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Sun, 27 Dec 2015 19:49:08 +0100
Subject: BIP143: Verification logic

Includes simplifications by Eric Lombrozo.
---
 src/script/sign.cpp | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

(limited to 'src/script/sign.cpp')

diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index 62d874eed4..83bb0cfa29 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -18,8 +18,7 @@ using namespace std;
 
 typedef std::vector<unsigned char> valtype;
 
-static const CAmount amountZero = 0;
-TransactionSignatureCreator::TransactionSignatureCreator(const CKeyStore* keystoreIn, const CTransaction* txToIn, unsigned int nInIn, int nHashTypeIn) : BaseSignatureCreator(keystoreIn), txTo(txToIn), nIn(nInIn), nHashType(nHashTypeIn), checker(txTo, nIn, amountZero) {}
+TransactionSignatureCreator::TransactionSignatureCreator(const CKeyStore* keystoreIn, const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, int nHashTypeIn) : BaseSignatureCreator(keystoreIn), txTo(txToIn), nIn(nInIn), nHashType(nHashTypeIn), amount(amountIn), checker(txTo, nIn, amountIn) {}
 
 bool TransactionSignatureCreator::CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& address, const CScript& scriptCode) const
 {
@@ -27,7 +26,7 @@ bool TransactionSignatureCreator::CreateSig(std::vector<unsigned char>& vchSig,
     if (!keystore->GetKey(address, key))
         return false;
 
-    uint256 hash = SignatureHash(scriptCode, *txTo, nIn, nHashType);
+    uint256 hash = SignatureHash(scriptCode, *txTo, nIn, nHashType, amount, SIGVERSION_BASE);
     if (!key.Sign(hash, vchSig))
         return false;
     vchSig.push_back((unsigned char)nHashType);
@@ -186,7 +185,7 @@ static CScript CombineMultisig(const CScript& scriptPubKey, const BaseSignatureC
             if (sigs.count(pubkey))
                 continue; // Already got a sig for this pubkey
 
-            if (checker.CheckSig(sig, pubkey, scriptPubKey))
+            if (checker.CheckSig(sig, pubkey, scriptPubKey, SIGVERSION_BASE))
             {
                 sigs[pubkey] = sig;
                 break;
@@ -256,10 +255,10 @@ static CScript CombineSignatures(const CScript& scriptPubKey, const BaseSignatur
     return CScript();
 }
 
-CScript CombineSignatures(const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn,
+CScript CombineSignatures(const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, const CAmount& amount,
                           const CScript& scriptSig1, const CScript& scriptSig2)
 {
-    TransactionSignatureChecker checker(&txTo, nIn, amountZero);
+    TransactionSignatureChecker checker(&txTo, nIn, amount);
     return CombineSignatures(scriptPubKey, checker, scriptSig1, scriptSig2);
 }
 
@@ -271,9 +270,9 @@ CScript CombineSignatures(const CScript& scriptPubKey, const BaseSignatureChecke
     Solver(scriptPubKey, txType, vSolutions);
 
     vector<valtype> stack1;
-    EvalScript(stack1, scriptSig1, SCRIPT_VERIFY_STRICTENC, BaseSignatureChecker());
+    EvalScript(stack1, scriptSig1, SCRIPT_VERIFY_STRICTENC, BaseSignatureChecker(), SIGVERSION_BASE);
     vector<valtype> stack2;
-    EvalScript(stack2, scriptSig2, SCRIPT_VERIFY_STRICTENC, BaseSignatureChecker());
+    EvalScript(stack2, scriptSig2, SCRIPT_VERIFY_STRICTENC, BaseSignatureChecker(), SIGVERSION_BASE);
 
     return CombineSignatures(scriptPubKey, checker, txType, vSolutions, stack1, stack2);
 }
@@ -285,7 +284,7 @@ class DummySignatureChecker : public BaseSignatureChecker
 public:
     DummySignatureChecker() {}
 
-    bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const
+    bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
     {
         return true;
     }
-- 
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