diff options
| -rw-r--r-- | src/policy/policy.cpp | 4 | ||||
| -rw-r--r-- | src/script/script.cpp | 2 | ||||
| -rw-r--r-- | src/script/script.h | 1 | ||||
| -rw-r--r-- | src/script/standard.cpp | 21 | ||||
| -rw-r--r-- | src/script/standard.h | 2 | ||||
| -rw-r--r-- | src/test/transaction_tests.cpp | 21 |
6 files changed, 34 insertions, 17 deletions
diff --git a/src/policy/policy.cpp b/src/policy/policy.cpp index 169fef4af4..4c96fbf5a5 100644 --- a/src/policy/policy.cpp +++ b/src/policy/policy.cpp @@ -49,7 +49,9 @@ bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType) return false; if (m < 1 || m > n) return false; - } + } else if (whichType == TX_NULL_DATA && + (!GetBoolArg("-datacarrier", true) || scriptPubKey.size() > nMaxDatacarrierBytes)) + return false; return whichType != TX_NONSTANDARD; } diff --git a/src/script/script.cpp b/src/script/script.cpp index 0a8ec9fa7b..9a0c067a33 100644 --- a/src/script/script.cpp +++ b/src/script/script.cpp @@ -144,7 +144,7 @@ const char* GetOpName(opcodetype opcode) case OP_INVALIDOPCODE : return "OP_INVALIDOPCODE"; // Note: - // The template matching params OP_SMALLDATA/etc are defined in opcodetype enum + // The template matching params OP_SMALLINTEGER/etc are defined in opcodetype enum // as kind of implementation hack, they are *NOT* real opcodes. If found in real // Script, just let the default: case deal with them. diff --git a/src/script/script.h b/src/script/script.h index 3923a559b1..cdc9a71bb2 100644 --- a/src/script/script.h +++ b/src/script/script.h @@ -167,7 +167,6 @@ enum opcodetype // template matching params - OP_SMALLDATA = 0xf9, OP_SMALLINTEGER = 0xfa, OP_PUBKEYS = 0xfb, OP_PUBKEYHASH = 0xfd, diff --git a/src/script/standard.cpp b/src/script/standard.cpp index 59496d795d..bfef8afa17 100644 --- a/src/script/standard.cpp +++ b/src/script/standard.cpp @@ -51,11 +51,6 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi // Sender provides N pubkeys, receivers provides M signatures mTemplates.insert(make_pair(TX_MULTISIG, CScript() << OP_SMALLINTEGER << OP_PUBKEYS << OP_SMALLINTEGER << OP_CHECKMULTISIG)); - - // Empty, provably prunable, data-carrying output - if (GetBoolArg("-datacarrier", true)) - mTemplates.insert(make_pair(TX_NULL_DATA, CScript() << OP_RETURN << OP_SMALLDATA)); - mTemplates.insert(make_pair(TX_NULL_DATA, CScript() << OP_RETURN)); } vSolutionsRet.clear(); @@ -70,6 +65,16 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi return true; } + // Provably prunable, data-carrying output + // + // So long as script passes the IsUnspendable() test and all but the first + // byte passes the IsPushOnly() test we don't care what exactly is in the + // script. + if (scriptPubKey.size() >= 1 && scriptPubKey[0] == OP_RETURN && scriptPubKey.IsPushOnly(scriptPubKey.begin()+1)) { + typeRet = TX_NULL_DATA; + return true; + } + // Scan templates const CScript& script1 = scriptPubKey; BOOST_FOREACH(const PAIRTYPE(txnouttype, CScript)& tplate, mTemplates) @@ -142,12 +147,6 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi else break; } - else if (opcode2 == OP_SMALLDATA) - { - // small pushdata, <= nMaxDatacarrierBytes - if (vch1.size() > nMaxDatacarrierBytes) - break; - } else if (opcode1 != opcode2 || vch1 != vch2) { // Others must match exactly diff --git a/src/script/standard.h b/src/script/standard.h index 9e17dac700..ae1bbecca0 100644 --- a/src/script/standard.h +++ b/src/script/standard.h @@ -25,7 +25,7 @@ public: CScriptID(const uint160& in) : uint160(in) {} }; -static const unsigned int MAX_OP_RETURN_RELAY = 80; //! bytes +static const unsigned int MAX_OP_RETURN_RELAY = 83; //! bytes (+1 for OP_RETURN, +2 for the pushdata opcodes) extern unsigned nMaxDatacarrierBytes; /** diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp index beec396675..9847f6512e 100644 --- a/src/test/transaction_tests.cpp +++ b/src/test/transaction_tests.cpp @@ -351,12 +351,29 @@ BOOST_AUTO_TEST_CASE(test_IsStandard) t.vout[0].scriptPubKey = CScript() << OP_1; BOOST_CHECK(!IsStandardTx(t, reason)); - // 80-byte TX_NULL_DATA (standard) + // MAX_OP_RETURN_RELAY-byte TX_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(t, reason)); - // 81-byte TX_NULL_DATA (non-standard) + // MAX_OP_RETURN_RELAY+1-byte TX_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()); + BOOST_CHECK(!IsStandardTx(t, reason)); + + // Data payload can be encoded in any way... + t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex(""); + BOOST_CHECK(IsStandardTx(t, reason)); + t.vout[0].scriptPubKey = CScript() << OP_RETURN << ParseHex("00") << ParseHex("01"); + BOOST_CHECK(IsStandardTx(t, reason)); + // 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(t, reason)); + t.vout[0].scriptPubKey = CScript() << OP_RETURN << 0 << ParseHex("01") << 2 << ParseHex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); + BOOST_CHECK(IsStandardTx(t, reason)); + + // ...so long as it only contains PUSHDATA's + t.vout[0].scriptPubKey = CScript() << OP_RETURN << OP_RETURN; BOOST_CHECK(!IsStandardTx(t, reason)); // TX_NULL_DATA w/o PUSHDATA |