From 3e5d2fe86a91048ebbf473b63d9f6a9af379ea39 Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Sun, 21 Feb 2016 17:52:08 +0800
Subject: [PATCH] Add CScript::PushWithdraw function

---
 src/script/script.cpp | 14 ++++++++++++++
 src/script/script.h   |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/src/script/script.cpp b/src/script/script.cpp
index 3392615084..6c141e26ad 100644
--- a/src/script/script.cpp
+++ b/src/script/script.cpp
@@ -336,6 +336,20 @@ COutPoint CScript::GetWithdrawSpent() const
     }
 }
 
+void CScript::PushWithdraw(const vector<unsigned char> push) {
+    int64_t pushCount = 0;
+    for (vector<unsigned char>::const_iterator it = push.begin(); it < push.end(); pushCount++) {
+        if (push.end() - it < 520) {
+            *this << vector<unsigned char>(it, push.end());
+            it = push.end();
+        } else {
+            *this << vector<unsigned char>(it, it + 520);
+            it += 520;
+        }
+    }
+    *this << pushCount;
+}
+
 bool CScript::IsPayToScriptHash() const
 {
     // Extra-fast test for pay-to-script-hash CScripts:
diff --git a/src/script/script.h b/src/script/script.h
index 087ac4ea4f..1d2046b6d7 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -635,6 +635,9 @@ public:
     /** Returns true if this is a proof-of-withdraw, spending an IsWithdrawLock */
     bool IsWithdrawProof() const;
 
+    //! Push a vector with a length postfix (as used by withdraw proofs)
+    void PushWithdraw(const std::vector<unsigned char> push);
+
     /** Get the withdraw output spent, asserting IsWithdrawProof first */
     COutPoint GetWithdrawSpent() const;