From 627468d2ea1f4d5dea9561fe77aaf53f3a83b4d2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Jan=C3=ADk?= <Pavel@Janik.cz>
Date: Mon, 29 Jun 2015 20:14:43 +0200
Subject: Add support for data-based outputs (OP_RETURN) to bitcoin-tx.

---
 src/bitcoin-tx.cpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'src/bitcoin-tx.cpp')

diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index e389d51a73..97a073174d 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -70,6 +70,7 @@ static bool AppInitRawTx(int argc, char* argv[])
         strUsage += HelpMessageOpt("locktime=N", _("Set TX lock time to N"));
         strUsage += HelpMessageOpt("nversion=N", _("Set TX version to N"));
         strUsage += HelpMessageOpt("outaddr=VALUE:ADDRESS", _("Add address-based output to TX"));
+        strUsage += HelpMessageOpt("outdata=[VALUE:]DATA", _("Add data-based output to TX"));
         strUsage += HelpMessageOpt("outscript=VALUE:SCRIPT", _("Add raw script output to TX"));
         strUsage += HelpMessageOpt("sign=SIGHASH-FLAGS", _("Add zero or more signatures to transaction") + ". " +
             _("This command requires JSON registers:") +
@@ -231,6 +232,35 @@ static void MutateTxAddOutAddr(CMutableTransaction& tx, const string& strInput)
     tx.vout.push_back(txout);
 }
 
+static void MutateTxAddOutData(CMutableTransaction& tx, const string& strInput)
+{
+    CAmount value = 0;
+
+    // separate [VALUE:]DATA in string
+    size_t pos = strInput.find(':');
+
+    if (pos==0)
+        throw runtime_error("TX output value not specified");
+
+    if (pos != string::npos) {
+        // extract and validate VALUE
+        string strValue = strInput.substr(0, pos);
+        if (!ParseMoney(strValue, value))
+            throw runtime_error("invalid TX output value");
+    }
+
+    // extract and validate DATA
+    string strData = strInput.substr(pos + 1, string::npos);
+
+    if (!IsHex(strData))
+        throw runtime_error("invalid TX output data");
+
+    std::vector<unsigned char> data = ParseHex(strData);
+
+    CTxOut txout(value, CScript() << OP_RETURN << data);
+    tx.vout.push_back(txout);
+}
+
 static void MutateTxAddOutScript(CMutableTransaction& tx, const string& strInput)
 {
     // separate VALUE:SCRIPT in string
@@ -470,6 +500,8 @@ static void MutateTx(CMutableTransaction& tx, const string& command,
         MutateTxDelOutput(tx, commandVal);
     else if (command == "outaddr")
         MutateTxAddOutAddr(tx, commandVal);
+    else if (command == "outdata")
+        MutateTxAddOutData(tx, commandVal);
     else if (command == "outscript")
         MutateTxAddOutScript(tx, commandVal);
 
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