Merge pull request #443 from TheBlueMatt/dupin

Check for duplicate txins in CheckTransaction.
13 years ago · 4e5d88ce26
1 changed files with 9 additions and 0 deletions
--- a/src/main.cpp
+++ b/src/main.cpp
@ -314,6 +314,15 @@ bool CTransaction::CheckTransaction() const
				@@ -314,6 +314,15 @@ bool CTransaction::CheckTransaction() const
            return error("CTransaction::CheckTransaction() : txout total out of range");
    }

+    // Check for duplicate inputs
+    set<COutPoint> vInOutPoints;
+    BOOST_FOREACH(const CTxIn& txin, vin)
+    {
+        if (vInOutPoints.count(txin.prevout))
+            return false;
+        vInOutPoints.insert(txin.prevout);
+    }
+
    if (IsCoinBase())
    {
        if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)