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Merge #14890: rpc: Avoid creating non-standard raw transactions

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fa4c8679ed rpc: Avoid creating non-standard raw transactions (MarcoFalke)

Pull request description:

  Multiple OP_RETURN outputs in a transaction are not standard and unlikely to be relayed, so avoid creating them.

  Apart from that, the logic was broken in that it duplicated the same hex-data for each data output: Closes #14868.

Tree-SHA512: b08d08062b5622e8a7b497e490ccaf53b06e844c863fda3bf3f932a98684a809e8341aeb98232059a795afb32d8770a6c5591a66f8e6ee372b672af245607887
This commit is contained in:
Wladimir J. van der Laan 2018-12-07 17:19:28 +01:00
commit d38a2c1416
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GPG key ID: 1E4AED62986CD25D
4 changed files with 19 additions and 16 deletions
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16
src/rpc/rawtransaction.cpp
View file

@ -397,7 +397,6 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
rawTx.vin.push_back(in);
}
std::set<CTxDestination> destinations;
if (!outputs_is_obj) {
// Translate array of key-value pairs into dict
UniValue outputs_dict = UniValue(UniValue::VOBJ);
@ -413,8 +412,17 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
}
outputs = std::move(outputs_dict);
}
// Duplicate checking
std::set<CTxDestination> destinations;
bool has_data{false};
for (const std::string& name_ : outputs.getKeys()) {
if (name_ == "data") {
if (has_data) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, duplicate key: data");
}
has_data = true;
std::vector<unsigned char> data = ParseHexV(outputs[name_].getValStr(), "Data");
CTxOut out(0, CScript() << OP_RETURN << data);
@ -466,7 +474,8 @@ static UniValue createrawtransaction(const JSONRPCRequest& request)
},
},
},
{"outputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "a json array with outputs (key-value pairs).\n"
{"outputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "a json array with outputs (key-value pairs), where none of the keys are duplicated.\n"
"That is, each address can only appear once and there can only be one 'data' object.\n"
"For compatibility reasons, a dictionary, which holds the key-value pairs directly, is also\n"
" accepted as second parameter.",
{
@ -1608,7 +1617,8 @@ UniValue createpsbt(const JSONRPCRequest& request)
},
},
},
{"outputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "a json array with outputs (key-value pairs).\n"
{"outputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "a json array with outputs (key-value pairs), where none of the keys are duplicated.\n"
"That is, each address can only appear once and there can only be one 'data' object.\n"
"For compatibility reasons, a dictionary, which holds the key-value pairs directly, is also\n"
" accepted as second parameter.",
{

3
src/test/rpc_tests.cpp
View file

@ -129,9 +129,6 @@ BOOST_AUTO_TEST_CASE(rpc_createraw_op_return)
{
BOOST_CHECK_NO_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"data\":\"68656c6c6f776f726c64\"}"));
// Allow more than one data transaction output
BOOST_CHECK_NO_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"data\":\"68656c6c6f776f726c64\",\"data\":\"68656c6c6f776f726c64\"}"));
// Key not "data" (bad address)
BOOST_CHECK_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"somedata\":\"68656c6c6f776f726c64\"}"), std::runtime_error);

3
src/wallet/rpcwallet.cpp
View file

@ -4023,7 +4023,8 @@ UniValue walletcreatefundedpsbt(const JSONRPCRequest& request)
},
},
},
{"outputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "a json array with outputs (key-value pairs).\n"
{"outputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "a json array with outputs (key-value pairs), where none of the keys are duplicated.\n"
"That is, each address can only appear once and there can only be one 'data' object.\n"
"For compatibility reasons, a dictionary, which holds the key-value pairs directly, is also\n"
" accepted as second parameter.",
{

13
test/functional/rpc_rawtransaction.py
View file

@ -100,6 +100,8 @@ class RawTransactionsTest(BitcoinTestFramework):
assert_raises_rpc_error(-3, "Amount out of range", self.nodes[0].createrawtransaction, [], {address: -1})
assert_raises_rpc_error(-8, "Invalid parameter, duplicated address: %s" % address, self.nodes[0].createrawtransaction, [], multidict([(address, 1), (address, 1)]))
assert_raises_rpc_error(-8, "Invalid parameter, duplicated address: %s" % address, self.nodes[0].createrawtransaction, [], [{address: 1}, {address: 1}])
assert_raises_rpc_error(-8, "Invalid parameter, duplicate key: data", self.nodes[0].createrawtransaction, [], [{"data": 'aa'}, {"data": "bb"}])
assert_raises_rpc_error(-8, "Invalid parameter, duplicate key: data", self.nodes[0].createrawtransaction, [], multidict([("data", 'aa'), ("data", "bb")]))
assert_raises_rpc_error(-8, "Invalid parameter, key-value pair must contain exactly one key", self.nodes[0].createrawtransaction, [], [{'a': 1, 'b': 2}])
assert_raises_rpc_error(-8, "Invalid parameter, key-value pair not an object as expected", self.nodes[0].createrawtransaction, [], [['key-value pair1'], ['2']])
@ -127,19 +129,12 @@ class RawTransactionsTest(BitcoinTestFramework):
bytes_to_hex_str(tx.serialize()),
self.nodes[2].createrawtransaction(inputs=[{'txid': txid, 'vout': 9}], outputs=[{address: 99}, {address2: 99}]),
)
# Two data outputs
tx.deserialize(BytesIO(hex_str_to_bytes(self.nodes[2].createrawtransaction(inputs=[{'txid': txid, 'vout': 9}], outputs=multidict([('data', '99'), ('data', '99')])))))
assert_equal(len(tx.vout), 2)
assert_equal(
bytes_to_hex_str(tx.serialize()),
self.nodes[2].createrawtransaction(inputs=[{'txid': txid, 'vout': 9}], outputs=[{'data': '99'}, {'data': '99'}]),
)
# Multiple mixed outputs
tx.deserialize(BytesIO(hex_str_to_bytes(self.nodes[2].createrawtransaction(inputs=[{'txid': txid, 'vout': 9}], outputs=multidict([(address, 99), ('data', '99'), ('data', '99')])))))
tx.deserialize(BytesIO(hex_str_to_bytes(self.nodes[2].createrawtransaction(inputs=[{'txid': txid, 'vout': 9}], outputs=multidict([(address, 99), (address2, 99), ('data', '99')])))))
assert_equal(len(tx.vout), 3)
assert_equal(
bytes_to_hex_str(tx.serialize()),
self.nodes[2].createrawtransaction(inputs=[{'txid': txid, 'vout': 9}], outputs=[{address: 99}, {'data': '99'}, {'data': '99'}]),
self.nodes[2].createrawtransaction(inputs=[{'txid': txid, 'vout': 9}], outputs=[{address: 99}, {address2: 99}, {'data': '99'}]),
)
for type in ["bech32", "p2sh-segwit", "legacy"]: