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test: Always clear reject reason in IsStandard tx test
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MarcoFalke committed Sep 2, 2021
1 parent 6bf706a commit fa1b08e
Showing 1 changed file with 49 additions and 71 deletions.
120 changes: 49 additions & 71 deletions src/test/transaction_tests.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -765,130 +765,116 @@ BOOST_AUTO_TEST_CASE(test_IsStandard)
key.MakeNewKey(true);
t.vout[0].scriptPubKey = GetScriptForDestination(PKHash(key.GetPubKey()));

std::string reason;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
constexpr auto CheckIsStandard = [](const auto& t) {
std::string reason;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
BOOST_CHECK(reason.empty());
};
constexpr auto CheckIsNotStandard = [](const auto& t, const std::string& reason_in) {
std::string reason;
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason_in, reason);
};

CheckIsStandard(t);

// Check dust with default relay fee:
CAmount nDustThreshold = 182 * dustRelayFee.GetFeePerK()/1000;
CAmount nDustThreshold = 182 * dustRelayFee.GetFeePerK() / 1000;
BOOST_CHECK_EQUAL(nDustThreshold, 546);
// dust:
t.vout[0].nValue = nDustThreshold - 1;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "dust");
CheckIsNotStandard(t, "dust");
// not dust:
t.vout[0].nValue = nDustThreshold;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

// Disallowed nVersion
t.nVersion = -1;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "version");
CheckIsNotStandard(t, "version");

t.nVersion = 0;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "version");
CheckIsNotStandard(t, "version");

t.nVersion = 3;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "version");
CheckIsNotStandard(t, "version");

// Allowed nVersion
t.nVersion = 1;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

t.nVersion = 2;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

// Check dust with odd relay fee to verify rounding:
// nDustThreshold = 182 * 3702 / 1000
dustRelayFee = CFeeRate(3702);
// dust:
t.vout[0].nValue = 673 - 1;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "dust");
CheckIsNotStandard(t, "dust");
// not dust:
t.vout[0].nValue = 673;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);
dustRelayFee = CFeeRate(DUST_RELAY_TX_FEE);

t.vout[0].scriptPubKey = CScript() << OP_1;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "scriptpubkey");
CheckIsNotStandard(t, "scriptpubkey");

// MAX_OP_RETURN_RELAY-byte TxoutType::NULL_DATA (standard)
t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef3804678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38");
BOOST_CHECK_EQUAL(MAX_OP_RETURN_RELAY, t.vout[0].scriptPubKey.size());
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

// MAX_OP_RETURN_RELAY+1-byte TxoutType::NULL_DATA (non-standard)
t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef3804678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef3800");
BOOST_CHECK_EQUAL(MAX_OP_RETURN_RELAY + 1, t.vout[0].scriptPubKey.size());
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "scriptpubkey");
CheckIsNotStandard(t, "scriptpubkey");

// Data payload can be encoded in any way...
t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex("");
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);
t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex("00") << ParseHex("01");
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);
// OP_RESERVED *is* considered to be a PUSHDATA type opcode by IsPushOnly()!
t.vout[0].scriptPubKey = CScript() << OP_RETURN << OP_RESERVED << -1 << 0 << ParseHex("01") << 2 << 3 << 4 << 5 << 6 << 7 << 8 << 9 << 10 << 11 << 12 << 13 << 14 << 15 << 16;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);
t.vout[0].scriptPubKey = CScript() << OP_RETURN << 0 << ParseHex("01") << 2 << ParseHex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

// ...so long as it only contains PUSHDATA's
t.vout[0].scriptPubKey = CScript() << OP_RETURN << OP_RETURN;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "scriptpubkey");
CheckIsNotStandard(t, "scriptpubkey");

// TxoutType::NULL_DATA w/o PUSHDATA
t.vout.resize(1);
t.vout[0].scriptPubKey = CScript() << OP_RETURN;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

// Only one TxoutType::NULL_DATA permitted in all cases
t.vout.resize(2);
t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38");
t.vout[0].nValue = 0;
t.vout[1].scriptPubKey = CScript() << OP_RETURN << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38");
t.vout[1].nValue = 0;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "multi-op-return");
CheckIsNotStandard(t, "multi-op-return");

t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38");
t.vout[1].scriptPubKey = CScript() << OP_RETURN;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "multi-op-return");
CheckIsNotStandard(t, "multi-op-return");

t.vout[0].scriptPubKey = CScript() << OP_RETURN;
t.vout[1].scriptPubKey = CScript() << OP_RETURN;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "multi-op-return");
CheckIsNotStandard(t, "multi-op-return");

// Check large scriptSig (non-standard if size is >1650 bytes)
t.vout.resize(1);
t.vout[0].nValue = MAX_MONEY;
t.vout[0].scriptPubKey = GetScriptForDestination(PKHash(key.GetPubKey()));
// OP_PUSHDATA2 with len (3 bytes) + data (1647 bytes) = 1650 bytes
t.vin[0].scriptSig = CScript() << std::vector<unsigned char>(1647, 0); // 1650
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

t.vin[0].scriptSig = CScript() << std::vector<unsigned char>(1648, 0); // 1651
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "scriptsig-size");
CheckIsNotStandard(t, "scriptsig-size");

// Check scriptSig format (non-standard if there are any other ops than just PUSHs)
t.vin[0].scriptSig = CScript()
Expand All @@ -897,7 +883,7 @@ BOOST_AUTO_TEST_CASE(test_IsStandard)
<< std::vector<unsigned char>(235, 0) // OP_PUSHDATA1 x [...x bytes...]
<< std::vector<unsigned char>(1234, 0) // OP_PUSHDATA2 x [...x bytes...]
<< OP_9;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

const std::vector<unsigned char> non_push_ops = { // arbitrary set of non-push operations
OP_NOP, OP_VERIFY, OP_IF, OP_ROT, OP_3DUP, OP_SIZE, OP_EQUAL, OP_ADD, OP_SUB,
Expand All @@ -917,11 +903,10 @@ BOOST_AUTO_TEST_CASE(test_IsStandard)
// replace current push-op with each non-push-op
for (auto op : non_push_ops) {
t.vin[0].scriptSig[index] = op;
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "scriptsig-not-pushonly");
CheckIsNotStandard(t, "scriptsig-not-pushonly");
}
t.vin[0].scriptSig[index] = orig_op; // restore op
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);
}

// Check tx-size (non-standard if transaction weight is > MAX_STANDARD_TX_WEIGHT)
Expand All @@ -934,53 +919,46 @@ BOOST_AUTO_TEST_CASE(test_IsStandard)
// ===============================
// total: 400000 vbytes
BOOST_CHECK_EQUAL(GetTransactionWeight(CTransaction(t)), 400000);
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

// increase output size by one byte, so we end up with 400004 vbytes
t.vout[0].scriptPubKey = CScript() << OP_RETURN << std::vector<unsigned char>(20, 0); // output size: 31 bytes
BOOST_CHECK_EQUAL(GetTransactionWeight(CTransaction(t)), 400004);
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "tx-size");
CheckIsNotStandard(t, "tx-size");

// Check bare multisig (standard if policy flag fIsBareMultisigStd is set)
fIsBareMultisigStd = true;
t.vout[0].scriptPubKey = GetScriptForMultisig(1, {key.GetPubKey()}); // simple 1-of-1
t.vin.resize(1);
t.vin[0].scriptSig = CScript() << std::vector<unsigned char>(65, 0);
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

fIsBareMultisigStd = false;
reason.clear();
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "bare-multisig");
CheckIsNotStandard(t, "bare-multisig");
fIsBareMultisigStd = DEFAULT_PERMIT_BAREMULTISIG;

// Check P2WPKH outputs dust threshold
t.vout[0].scriptPubKey = CScript() << OP_0 << ParseHex("ffffffffffffffffffffffffffffffffffffffff");
t.vout[0].nValue = 294;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);
t.vout[0].nValue = 293;
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "dust");
CheckIsNotStandard(t, "dust");

// Check P2WSH outputs dust threshold
t.vout[0].scriptPubKey = CScript() << OP_0 << ParseHex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
t.vout[0].nValue = 330;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);
t.vout[0].nValue = 329;
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "dust");
CheckIsNotStandard(t, "dust");

// Check future Witness Program versions dust threshold
for (int op = OP_2; op <= OP_16; op += 1) {
t.vout[0].scriptPubKey = CScript() << (opcodetype)op << ParseHex("ffff");
t.vout[0].nValue = 240;
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
CheckIsStandard(t);

t.vout[0].nValue = 239;
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "dust");
CheckIsNotStandard(t, "dust");
}
}

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