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test: add unit test for non-standard txs with too large tx size

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The function IsStandardTx() returns rejection reason "tx-size" if the
transaction weight is larger than MAX_STANDARD_TX_WEIGHT (=400000 vbytes).
This commit is contained in:
Sebastian Falbesoner 2020-01-16 15:00:13 +01:00
parent 4e8b564df0
commit 4537ba5f21
1 changed files with 20 additions and 0 deletions
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20
src/test/transaction_tests.cpp
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@ -821,9 +821,29 @@ BOOST_AUTO_TEST_CASE(test_IsStandard)
BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
BOOST_CHECK_EQUAL(reason, "scriptsig-size");
// Check tx-size (non-standard if transaction weight is > MAX_STANDARD_TX_WEIGHT)
t.vin.clear();
t.vin.resize(2438); // size per input (empty scriptSig): 41 bytes
t.vout[0].scriptPubKey = CScript() << OP_RETURN << std::vector<unsigned char>(19, 0); // output size: 30 bytes
// tx header: 12 bytes => 48 vbytes
// 2438 inputs: 2438*41 = 99958 bytes => 399832 vbytes
// 1 output: 30 bytes => 120 vbytes
// ===============================
// total: 400000 vbytes
BOOST_CHECK_EQUAL(GetTransactionWeight(CTransaction(t)), 400000);
BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
// 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");
// 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));