Make non-minimal OP_IF/NOTIF argument non-standard for P2WSH

Github-Pull: #8526
Rebased-From: c72c5b1e3bd42e84465677e94aa83316ff3d9a14

8 files changed, 101 insertions, 2 deletions

diff --git a/src/policy/policy.h b/src/policy/policy.h
index 6bf5ca0ee5..458ec4a0cb 100644
--- a/src/policy/policy.h
+++ b/src/policy/policy.h
@@ -42,6 +42,7 @@ static const unsigned int STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VERIFY
                                                          SCRIPT_VERIFY_NULLDUMMY |
                                                          SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS |
                                                          SCRIPT_VERIFY_CLEANSTACK |
+                                                         SCRIPT_VERIFY_MINIMALIF |
                                                          SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY |
                                                          SCRIPT_VERIFY_CHECKSEQUENCEVERIFY |
                                                          SCRIPT_VERIFY_LOW_S |
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 47ea261e31..fd356fed0a 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -428,6 +428,12 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
                         if (stack.size() < 1)
                             return set_error(serror, SCRIPT_ERR_UNBALANCED_CONDITIONAL);
                         valtype& vch = stacktop(-1);
+                        if (sigversion == SIGVERSION_WITNESS_V0 && (flags & SCRIPT_VERIFY_MINIMALIF)) {
+                            if (vch.size() > 1)
+                                return set_error(serror, SCRIPT_ERR_MINIMALIF);
+                            if (vch.size() == 1 && vch[0] != 1)
+                                return set_error(serror, SCRIPT_ERR_MINIMALIF);
+                        }
                         fValue = CastToBool(vch);
                         if (opcode == OP_NOTIF)
                             fValue = !fValue;
diff --git a/src/script/interpreter.h b/src/script/interpreter.h
index e5d7865cd3..2ce4b23e54 100644
--- a/src/script/interpreter.h
+++ b/src/script/interpreter.h
@@ -94,6 +94,10 @@ enum
     // Making v1-v16 witness program non-standard
     //
     SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM = (1U << 12),
+
+    // Segwit script only: Require the argument of OP_IF/NOTIF to be exactly 0x01 or empty vector
+    //
+    SCRIPT_VERIFY_MINIMALIF = (1U << 13),
 };
 
 bool CheckSignatureEncoding(const std::vector<unsigned char> &vchSig, unsigned int flags, ScriptError* serror);
diff --git a/src/script/script_error.cpp b/src/script/script_error.cpp
index cef807edcf..9969c232fc 100644
--- a/src/script/script_error.cpp
+++ b/src/script/script_error.cpp
@@ -63,6 +63,8 @@ const char* ScriptErrorString(const ScriptError serror)
             return "Non-canonical signature: S value is unnecessarily high";
         case SCRIPT_ERR_SIG_NULLDUMMY:
             return "Dummy CHECKMULTISIG argument must be zero";
+        case SCRIPT_ERR_MINIMALIF:
+            return "OP_IF/NOTIF argument must be minimal";
         case SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS:
             return "NOPx reserved for soft-fork upgrades";
         case SCRIPT_ERR_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM:
diff --git a/src/script/script_error.h b/src/script/script_error.h
index 09dc6945ad..6d34d37925 100644
--- a/src/script/script_error.h
+++ b/src/script/script_error.h
@@ -39,7 +39,7 @@ typedef enum ScriptError_t
     SCRIPT_ERR_NEGATIVE_LOCKTIME,
     SCRIPT_ERR_UNSATISFIED_LOCKTIME,
 
-    /* BIP62 */
+    /* Malleability */
     SCRIPT_ERR_SIG_HASHTYPE,
     SCRIPT_ERR_SIG_DER,
     SCRIPT_ERR_MINIMALDATA,
@@ -48,6 +48,7 @@ typedef enum ScriptError_t
     SCRIPT_ERR_SIG_NULLDUMMY,
     SCRIPT_ERR_PUBKEYTYPE,
     SCRIPT_ERR_CLEANSTACK,
+    SCRIPT_ERR_MINIMALIF,
 
     /* softfork safeness */
     SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS,
diff --git a/src/test/data/script_tests.json b/src/test/data/script_tests.json
index fcd5457386..d456a8beff 100644
--- a/src/test/data/script_tests.json
+++ b/src/test/data/script_tests.json
@@ -2125,5 +2125,88 @@
 ["0", "CHECKSEQUENCEVERIFY", "CHECKSEQUENCEVERIFY", "UNSATISFIED_LOCKTIME", "CSV fails if stack top bit 1 << 31 is set and the tx version < 2"],
 ["4294967296", "CHECKSEQUENCEVERIFY", "CHECKSEQUENCEVERIFY", "UNSATISFIED_LOCKTIME",
   "CSV fails if stack top bit 1 << 31 is not set, and tx version < 2"],
-["The End"]
+
+["MINIMALIF tests"],
+["MINIMALIF is not applied to non-segwit scripts"],
+["1", "IF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "OK"],
+["2", "IF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "OK"],
+["0x02 0x0100", "IF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "OK"],
+["0", "IF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["0x01 0x00", "IF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["1", "NOTIF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["2", "NOTIF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["0x02 0x0100", "NOTIF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["0", "NOTIF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "OK"],
+["0x01 0x00", "NOTIF 1 ENDIF", "P2SH,WITNESS,MINIMALIF", "OK"],
+["Normal P2SH IF 1 ENDIF"],
+["1 0x03 0x635168", "HASH160 0x14 0xe7309652a8e3f600f06f5d8d52d6df03d2176cc3 EQUAL", "P2SH,WITNESS,MINIMALIF", "OK"],
+["2 0x03 0x635168", "HASH160 0x14 0xe7309652a8e3f600f06f5d8d52d6df03d2176cc3 EQUAL", "P2SH,WITNESS,MINIMALIF", "OK"],
+["0x02 0x0100 0x03 0x635168", "HASH160 0x14 0xe7309652a8e3f600f06f5d8d52d6df03d2176cc3 EQUAL", "P2SH,WITNESS,MINIMALIF", "OK"],
+["0 0x03 0x635168", "HASH160 0x14 0xe7309652a8e3f600f06f5d8d52d6df03d2176cc3 EQUAL", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["0x01 0x00 0x03 0x635168", "HASH160 0x14 0xe7309652a8e3f600f06f5d8d52d6df03d2176cc3 EQUAL", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["0x03 0x635168", "HASH160 0x14 0xe7309652a8e3f600f06f5d8d52d6df03d2176cc3 EQUAL", "P2SH,WITNESS,MINIMALIF", "UNBALANCED_CONDITIONAL"],
+["Normal P2SH NOTIF 1 ENDIF"],
+["1 0x03 0x645168", "HASH160 0x14 0x0c3f8fe3d6ca266e76311ecda544c67d15fdd5b0 EQUAL", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["2 0x03 0x645168", "HASH160 0x14 0x0c3f8fe3d6ca266e76311ecda544c67d15fdd5b0 EQUAL", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["0x02 0x0100 0x03 0x645168", "HASH160 0x14 0x0c3f8fe3d6ca266e76311ecda544c67d15fdd5b0 EQUAL", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+["0 0x03 0x645168", "HASH160 0x14 0x0c3f8fe3d6ca266e76311ecda544c67d15fdd5b0 EQUAL", "P2SH,WITNESS,MINIMALIF", "OK"],
+["0x01 0x00 0x03 0x645168", "HASH160 0x14 0x0c3f8fe3d6ca266e76311ecda544c67d15fdd5b0 EQUAL", "P2SH,WITNESS,MINIMALIF", "OK"],
+["0x03 0x645168", "HASH160 0x14 0x0c3f8fe3d6ca266e76311ecda544c67d15fdd5b0 EQUAL", "P2SH,WITNESS,MINIMALIF", "UNBALANCED_CONDITIONAL"],
+["P2WSH IF 1 ENDIF"],
+[["01", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS", "OK"],
+[["02", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS", "OK"],
+[["0100", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS", "OK"],
+[["", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS", "EVAL_FALSE"],
+[["00", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS", "EVAL_FALSE"],
+[["01", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS,MINIMALIF", "OK"],
+[["02", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["0100", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+[["00", "635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS", "UNBALANCED_CONDITIONAL"],
+[["635168", 0.00000001], "", "0 0x20 0xc7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "P2SH,WITNESS,MINIMALIF", "UNBALANCED_CONDITIONAL"],
+["P2WSH NOTIF 1 ENDIF"],
+[["01", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS", "EVAL_FALSE"],
+[["02", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS", "EVAL_FALSE"],
+[["0100", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS", "EVAL_FALSE"],
+[["", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS", "OK"],
+[["00", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS", "OK"],
+[["01", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+[["02", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["0100", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS,MINIMALIF", "OK"],
+[["00", "645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS", "UNBALANCED_CONDITIONAL"],
+[["645168", 0.00000001], "", "0 0x20 0xf913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "P2SH,WITNESS,MINIMALIF", "UNBALANCED_CONDITIONAL"],
+
+
+
+["P2SH-P2WSH IF 1 ENDIF"],
+[["01", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS", "OK"],
+[["02", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS", "OK"],
+[["0100", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS", "OK"],
+[["", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS", "EVAL_FALSE"],
+[["00", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS", "EVAL_FALSE"],
+[["01", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS,MINIMALIF", "OK"],
+[["02", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["0100", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+[["00", "635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS", "UNBALANCED_CONDITIONAL"],
+[["635168", 0.00000001], "0x22 0x0020c7eaf06d5ae01a58e376e126eb1e6fab2036076922b96b2711ffbec1e590665d", "HASH160 0x14 0x9b27ee6d9010c21bf837b334d043be5d150e7ba7 EQUAL", "P2SH,WITNESS,MINIMALIF", "UNBALANCED_CONDITIONAL"],
+["P2SH-P2WSH NOTIF 1 ENDIF"],
+[["01", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS", "EVAL_FALSE"],
+[["02", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS", "EVAL_FALSE"],
+[["0100", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS", "EVAL_FALSE"],
+[["", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS", "OK"],
+[["00", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS", "OK"],
+[["01", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS,MINIMALIF", "EVAL_FALSE"],
+[["02", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["0100", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS,MINIMALIF", "OK"],
+[["00", "645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS,MINIMALIF", "MINIMALIF"],
+[["645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS", "UNBALANCED_CONDITIONAL"],
+[["645168", 0.00000001], "0x22 0x0020f913eacf2e38a5d6fc3a8311d72ae704cb83866350a984dd3e5eb76d2a8c28e8", "HASH160 0x14 0xdbb7d1c0a56b7a9c423300c8cca6e6e065baf1dc EQUAL", "P2SH,WITNESS,MINIMALIF", "UNBALANCED_CONDITIONAL"],
+
+ ["The End"]
 ]
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index 5a9aaf9bc0..36c591d616 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -89,6 +89,7 @@ static ScriptErrorDesc script_errors[]={
     {SCRIPT_ERR_SIG_NULLDUMMY, "SIG_NULLDUMMY"},
     {SCRIPT_ERR_PUBKEYTYPE, "PUBKEYTYPE"},
     {SCRIPT_ERR_CLEANSTACK, "CLEANSTACK"},
+    {SCRIPT_ERR_MINIMALIF, "MINIMALIF"},
     {SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS, "DISCOURAGE_UPGRADABLE_NOPS"},
     {SCRIPT_ERR_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM, "DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM"},
     {SCRIPT_ERR_WITNESS_PROGRAM_WRONG_LENGTH, "WITNESS_PROGRAM_WRONG_LENGTH"},
diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp
index b5af400bc5..165dfd9a3e 100644
--- a/src/test/transaction_tests.cpp
+++ b/src/test/transaction_tests.cpp
@@ -50,6 +50,7 @@ static std::map<string, unsigned int> mapFlagNames = boost::assign::map_list_of
     (string("NULLDUMMY"), (unsigned int)SCRIPT_VERIFY_NULLDUMMY)
     (string("DISCOURAGE_UPGRADABLE_NOPS"), (unsigned int)SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS)
     (string("CLEANSTACK"), (unsigned int)SCRIPT_VERIFY_CLEANSTACK)
+    (string("MINIMALIF"), (unsigned int)SCRIPT_VERIFY_MINIMALIF)
     (string("CHECKLOCKTIMEVERIFY"), (unsigned int)SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY)
     (string("CHECKSEQUENCEVERIFY"), (unsigned int)SCRIPT_VERIFY_CHECKSEQUENCEVERIFY)
     (string("WITNESS"), (unsigned int)SCRIPT_VERIFY_WITNESS)