Add all transaction output types to bitcoin-tx.

This commit enhances bitcoin-tx so all remaining standard TXO types can be created:

- Pay to Pub Key
- Multi-sig
  - bare multi-sig
  - multi-sig in Pay To Script Hash
  - multi-sig in Pay to Witness Script Hash
  - multi-sig in Pay to Witness Script Hash, wrapped in P2SH
- Pay to Witness Pub Key Hash
  - Pay to Witness Pub Key Hash, wrapped in P2SH
- Pay to Witness Script Hash
  - Pay to Witness Script Hash, wrapped in P2SH

src/bitcoin-tx.cpp

@@ -78,10 +78,16 @@ static int 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("outpubkey=VALUE:PUBKEY[:FLAGS]", _("Add pay-to-pubkey output to TX") + ". " +
+            _("Optionally add the \"W\" flag to produce a pay-to-witness-pubkey-hash output") + ". " +
+            _("Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash."));
         strUsage += HelpMessageOpt("outdata=[VALUE:]DATA", _("Add data-based output to TX"));
-        strUsage += HelpMessageOpt("outscript=VALUE:SCRIPT(:\"SEGWIT\")(:\"P2SH\")", _("Add raw script output to TX") + ". " +
+        strUsage += HelpMessageOpt("outscript=VALUE:SCRIPT[:FLAGS]", _("Add raw script output to TX") + ". " +
-            _("Optionally add the \"SEGWIT\" flag to produce a segwit output") + ". " +
+            _("Optionally add the \"W\" flag to produce a pay-to-witness-script-hash output") + ". " +
-            _("Optionally add the \"P2SH\" flag to wrap the script in a P2SH output."));
+            _("Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash."));
+        strUsage += HelpMessageOpt("outmultisig=VALUE:REQUIRED:PUBKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]", _("Add Pay To n-of-m Multi-sig output to TX. n = REQUIRED, m = PUBKEYS") + ". " +
+            _("Optionally add the \"W\" flag to produce a pay-to-witness-script-hash output") + ". " +
+            _("Optionally add the \"S\" flag to wrap the output in a pay-to-script-hash."));
         strUsage += HelpMessageOpt("sign=SIGHASH-FLAGS", _("Add zero or more signatures to transaction") + ". " +
             _("This command requires JSON registers:") +
             _("prevtxs=JSON object") + ", " +
@@ -170,6 +176,14 @@ static void RegisterLoad(const std::string& strInput)
     RegisterSetJson(key, valStr);
 }
 
+static CAmount ExtractAndValidateValue(const std::string& strValue)
+{
+    CAmount value;
+    if (!ParseMoney(strValue, value))
+        throw std::runtime_error("invalid TX output value");
+    return value;
+}
+
 static void MutateTxVersion(CMutableTransaction& tx, const std::string& cmdVal)
 {
     int64_t newVersion = atoi64(cmdVal);
@@ -224,25 +238,18 @@ static void MutateTxAddInput(CMutableTransaction& tx, const std::string& strInpu
 
 static void MutateTxAddOutAddr(CMutableTransaction& tx, const std::string& strInput)
 {
-    // separate VALUE:ADDRESS in string
+    // Separate into VALUE:ADDRESS
-    size_t pos = strInput.find(':');
+    std::vector<std::string> vStrInputParts;
-    if ((pos == std::string::npos) ||
+    boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
-        (pos == 0) ||
-        (pos == (strInput.size() - 1)))
-        throw std::runtime_error("TX output missing separator");
 
-    // extract and validate VALUE
+    // Extract and validate VALUE
-    std::string strValue = strInput.substr(0, pos);
+    CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
-    CAmount value;
-    if (!ParseMoney(strValue, value))
-        throw std::runtime_error("invalid TX output value");
 
     // extract and validate ADDRESS
-    std::string strAddr = strInput.substr(pos + 1, std::string::npos);
+    std::string strAddr = vStrInputParts[1];
     CBitcoinAddress addr(strAddr);
     if (!addr.IsValid())
         throw std::runtime_error("invalid TX output address");
-
     // build standard output script via GetScriptForDestination()
     CScript scriptPubKey = GetScriptForDestination(addr.Get());
 
@@ -251,6 +258,114 @@ static void MutateTxAddOutAddr(CMutableTransaction& tx, const std::string& strIn
     tx.vout.push_back(txout);
 }
 
+static void MutateTxAddOutPubKey(CMutableTransaction& tx, const std::string& strInput)
+{
+    // Separate into VALUE:PUBKEY[:FLAGS]
+    std::vector<std::string> vStrInputParts;
+    boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
+
+    // Extract and validate VALUE
+    CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
+
+    // Extract and validate PUBKEY
+    CPubKey pubkey(ParseHex(vStrInputParts[1]));
+    if (!pubkey.IsFullyValid())
+        throw std::runtime_error("invalid TX output pubkey");
+    CScript scriptPubKey = GetScriptForRawPubKey(pubkey);
+    CBitcoinAddress addr(scriptPubKey);
+
+    // Extract and validate FLAGS
+    bool bSegWit = false;
+    bool bScriptHash = false;
+    if (vStrInputParts.size() == 3) {
+        std::string flags = vStrInputParts[2];
+        bSegWit = (flags.find("W") != std::string::npos);
+        bScriptHash = (flags.find("S") != std::string::npos);
+    }
+
+    if (bSegWit) {
+        // Call GetScriptForWitness() to build a P2WSH scriptPubKey
+        scriptPubKey = GetScriptForWitness(scriptPubKey);
+    }
+    if (bScriptHash) {
+        // Get the address for the redeem script, then call
+        // GetScriptForDestination() to construct a P2SH scriptPubKey.
+        CBitcoinAddress redeemScriptAddr(scriptPubKey);
+        scriptPubKey = GetScriptForDestination(redeemScriptAddr.Get());
+    }
+
+    // construct TxOut, append to transaction output list
+    CTxOut txout(value, scriptPubKey);
+    tx.vout.push_back(txout);
+}
+
+static void MutateTxAddOutMultiSig(CMutableTransaction& tx, const std::string& strInput)
+{
+    // Separate into VALUE:REQUIRED:NUMKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]
+    std::vector<std::string> vStrInputParts;
+    boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
+
+    // Check that there are enough parameters
+    if (vStrInputParts.size()<3)
+        throw std::runtime_error("Not enough multisig parameters");
+
+    // Extract and validate VALUE
+    CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
+
+    // Extract REQUIRED
+    uint32_t required = stoul(vStrInputParts[1]);
+
+    // Extract NUMKEYS
+    uint32_t numkeys = stoul(vStrInputParts[2]);
+
+    // Validate there are the correct number of pubkeys
+    if (vStrInputParts.size() < numkeys + 3)
+        throw std::runtime_error("incorrect number of multisig pubkeys");
+
+    if (required < 1 || required > 20 || numkeys < 1 || numkeys > 20 || numkeys < required)
+        throw std::runtime_error("multisig parameter mismatch. Required " \
+                            + std::to_string(required) + " of " + std::to_string(numkeys) + "signatures.");
+
+    // extract and validate PUBKEYs
+    std::vector<CPubKey> pubkeys;
+    for(int pos = 1; pos <= int(numkeys); pos++) {
+        CPubKey pubkey(ParseHex(vStrInputParts[pos + 2]));
+        if (!pubkey.IsFullyValid())
+            throw std::runtime_error("invalid TX output pubkey");
+        pubkeys.push_back(pubkey);
+    }
+
+    // Extract FLAGS
+    bool bSegWit = false;
+    bool bScriptHash = false;
+    if (vStrInputParts.size() == numkeys + 4) {
+        std::string flags = vStrInputParts.back();
+        bSegWit = (flags.find("W") != std::string::npos);
+        bScriptHash = (flags.find("S") != std::string::npos);
+    }
+    else if (vStrInputParts.size() > numkeys + 4) {
+        // Validate that there were no more parameters passed
+        throw std::runtime_error("Too many parameters");
+    }
+
+    CScript scriptPubKey = GetScriptForMultisig(required, pubkeys);
+
+    if (bSegWit) {
+        // Call GetScriptForWitness() to build a P2WSH scriptPubKey
+        scriptPubKey = GetScriptForWitness(scriptPubKey);
+    }
+    if (bScriptHash) {
+        // Get the address for the redeem script, then call
+        // GetScriptForDestination() to construct a P2SH scriptPubKey.
+        CBitcoinAddress addr(scriptPubKey);
+        scriptPubKey = GetScriptForDestination(addr.Get());
+    }
+
+    // construct TxOut, append to transaction output list
+    CTxOut txout(value, scriptPubKey);
+    tx.vout.push_back(txout);
+}
+
 static void MutateTxAddOutData(CMutableTransaction& tx, const std::string& strInput)
 {
     CAmount value = 0;
@@ -262,10 +377,8 @@ static void MutateTxAddOutData(CMutableTransaction& tx, const std::string& strIn
         throw std::runtime_error("TX output value not specified");
 
     if (pos != std::string::npos) {
-        // extract and validate VALUE
+        // Extract and validate VALUE
-        std::string strValue = strInput.substr(0, pos);
+        value = ExtractAndValidateValue(strInput.substr(0, pos));
-        if (!ParseMoney(strValue, value))
-            throw std::runtime_error("invalid TX output value");
     }
 
     // extract and validate DATA
@@ -282,26 +395,32 @@ static void MutateTxAddOutData(CMutableTransaction& tx, const std::string& strIn
 
 static void MutateTxAddOutScript(CMutableTransaction& tx, const std::string& strInput)
 {
-    // separate VALUE:SCRIPT(:SEGWIT)(:P2SH)
+    // separate VALUE:SCRIPT[:FLAGS]
-    std::vector<std::string> vStrInput;
+    std::vector<std::string> vStrInputParts;
-    boost::split(vStrInput, strInput, boost::is_any_of(":"));
+    boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
-    if (vStrInput.size() < 2)
+    if (vStrInputParts.size() < 2)
-        throw srd::runtime_error("TX output missing separator");
+        throw std::runtime_error("TX output missing separator");
 
-    // extract and validate VALUE
+    // Extract and validate VALUE
-    std::string strValue = vStrInput[0];
+    CAmount value = ExtractAndValidateValue(vStrInputParts[0]);
-    CAmount value;
-    if (!ParseMoney(strValue, value))
-        throw std::runtime_error("invalid TX output value");
 
     // extract and validate script
-    std::string strScript = vStrInput[1];
+    std::string strScript = vStrInputParts[1];
-    CScript scriptPubKey = ParseScript(strScript); // throws on err
+    CScript scriptPubKey = ParseScript(strScript);
 
-    if (std::find(vStrInput.begin(), vStrInput.end(), "SEGWIT") != vStrInput.end()) {
+    // Extract FLAGS
+    bool bSegWit = false;
+    bool bScriptHash = false;
+    if (vStrInputParts.size() == 3) {
+        std::string flags = vStrInputParts.back();
+        bSegWit = (flags.find("W") != std::string::npos);
+        bScriptHash = (flags.find("S") != std::string::npos);
+    }
+
+    if (bSegWit) {
       scriptPubKey = GetScriptForWitness(scriptPubKey);
     }
-    if (std::find(vStrInput.begin(), vStrInput.end(), "P2SH") != vStrInput.end()) {
+    if (bScriptHash) {
       CBitcoinAddress addr(scriptPubKey);
       scriptPubKey = GetScriptForDestination(addr.Get());
     }
@@ -548,10 +667,14 @@ static void MutateTx(CMutableTransaction& tx, const std::string& command,
         MutateTxDelOutput(tx, commandVal);
     else if (command == "outaddr")
         MutateTxAddOutAddr(tx, commandVal);
-    else if (command == "outdata")
+    else if (command == "outpubkey")
-        MutateTxAddOutData(tx, commandVal);
+        MutateTxAddOutPubKey(tx, commandVal);
+    else if (command == "outmultisig")
+        MutateTxAddOutMultiSig(tx, commandVal);
     else if (command == "outscript")
         MutateTxAddOutScript(tx, commandVal);
+    else if (command == "outdata")
+        MutateTxAddOutData(tx, commandVal);
 
     else if (command == "sign") {
         if (!ecc) { ecc.reset(new Secp256k1Init()); }