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Refactor transaction creation and transaction funding logic

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In preparation for more create transaction and fund transcation RPCs,
refactor the transaction creation and funding logic into separate
functions.
This commit is contained in:
Andrew Chow 2018-06-27 17:02:07 -07:00
parent e9d86a43ad
commit 58a8e28918
3 changed files with 195 additions and 183 deletions
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134
src/rpc/rawtransaction.cpp
View file

@ -332,80 +332,25 @@ static UniValue verifytxoutproof(const JSONRPCRequest& request)
return res;
}
static UniValue createrawtransaction(const JSONRPCRequest& request)
CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, const UniValue& rbf)
{
if (request.fHelp || request.params.size() < 2 || request.params.size() > 4) {
throw std::runtime_error(
// clang-format off
"createrawtransaction [{\"txid\":\"id\",\"vout\":n},...] [{\"address\":amount},{\"data\":\"hex\"},...] ( locktime ) ( replaceable )\n"
"\nCreate a transaction spending the given inputs and creating new outputs.\n"
"Outputs can be addresses or data.\n"
"Returns hex-encoded raw transaction.\n"
"Note that the transaction's inputs are not signed, and\n"
"it is not stored in the wallet or transmitted to the network.\n"
"\nArguments:\n"
"1. \"inputs\" (array, required) A json array of json objects\n"
" [\n"
" {\n"
" \"txid\":\"id\", (string, required) The transaction id\n"
" \"vout\":n, (numeric, required) The output number\n"
" \"sequence\":n (numeric, optional) The sequence number\n"
" } \n"
" ,...\n"
" ]\n"
"2. \"outputs\" (array, required) a json array with outputs (key-value pairs)\n"
" [\n"
" {\n"
" \"address\": x.xxx, (obj, optional) A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT + "\n"
" },\n"
" {\n"
" \"data\": \"hex\" (obj, optional) A key-value pair. The key must be \"data\", the value is hex encoded data\n"
" }\n"
" ,... More key-value pairs of the above form. For compatibility reasons, a dictionary, which holds the key-value pairs directly, is also\n"
" accepted as second parameter.\n"
" ]\n"
"3. locktime (numeric, optional, default=0) Raw locktime. Non-0 value also locktime-activates inputs\n"
"4. replaceable (boolean, optional, default=false) Marks this transaction as BIP125 replaceable.\n"
" Allows this transaction to be replaced by a transaction with higher fees. If provided, it is an error if explicit sequence numbers are incompatible.\n"
"\nResult:\n"
"\"transaction\" (string) hex string of the transaction\n"
"\nExamples:\n"
+ HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\" \"[{\\\"address\\\":0.01}]\"")
+ HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\" \"[{\\\"data\\\":\\\"00010203\\\"}]\"")
+ HelpExampleRpc("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\", \"[{\\\"address\\\":0.01}]\"")
+ HelpExampleRpc("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\", \"[{\\\"data\\\":\\\"00010203\\\"}]\"")
// clang-format on
);
}
RPCTypeCheck(request.params, {
UniValue::VARR,
UniValueType(), // ARR or OBJ, checked later
UniValue::VNUM,
UniValue::VBOOL
}, true
);
if (request.params[0].isNull() || request.params[1].isNull())
if (inputs_in.isNull() || outputs_in.isNull())
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, arguments 1 and 2 must be non-null");
UniValue inputs = request.params[0].get_array();
const bool outputs_is_obj = request.params[1].isObject();
UniValue outputs = outputs_is_obj ?
request.params[1].get_obj() :
request.params[1].get_array();
UniValue inputs = inputs_in.get_array();
const bool outputs_is_obj = outputs_in.isObject();
UniValue outputs = outputs_is_obj ? outputs_in.get_obj() : outputs_in.get_array();
CMutableTransaction rawTx;
if (!request.params[2].isNull()) {
int64_t nLockTime = request.params[2].get_int64();
if (!locktime.isNull()) {
int64_t nLockTime = locktime.get_int64();
if (nLockTime < 0 || nLockTime > std::numeric_limits<uint32_t>::max())
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, locktime out of range");
rawTx.nLockTime = nLockTime;
}
bool rbfOptIn = request.params[3].isTrue();
bool rbfOptIn = rbf.isTrue();
for (unsigned int idx = 0; idx < inputs.size(); idx++) {
const UniValue& input = inputs[idx];
@ -485,10 +430,71 @@ static UniValue createrawtransaction(const JSONRPCRequest& request)
}
}
if (!request.params[3].isNull() && rbfOptIn != SignalsOptInRBF(rawTx)) {
if (!rbf.isNull() && rbfOptIn != SignalsOptInRBF(rawTx)) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter combination: Sequence number(s) contradict replaceable option");
}
return rawTx;
}
static UniValue createrawtransaction(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 2 || request.params.size() > 4) {
throw std::runtime_error(
// clang-format off
"createrawtransaction [{\"txid\":\"id\",\"vout\":n},...] [{\"address\":amount},{\"data\":\"hex\"},...] ( locktime ) ( replaceable )\n"
"\nCreate a transaction spending the given inputs and creating new outputs.\n"
"Outputs can be addresses or data.\n"
"Returns hex-encoded raw transaction.\n"
"Note that the transaction's inputs are not signed, and\n"
"it is not stored in the wallet or transmitted to the network.\n"
"\nArguments:\n"
"1. \"inputs\" (array, required) A json array of json objects\n"
" [\n"
" {\n"
" \"txid\":\"id\", (string, required) The transaction id\n"
" \"vout\":n, (numeric, required) The output number\n"
" \"sequence\":n (numeric, optional) The sequence number\n"
" } \n"
" ,...\n"
" ]\n"
"2. \"outputs\" (array, required) a json array with outputs (key-value pairs)\n"
" [\n"
" {\n"
" \"address\": x.xxx, (obj, optional) A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT + "\n"
" },\n"
" {\n"
" \"data\": \"hex\" (obj, optional) A key-value pair. The key must be \"data\", the value is hex encoded data\n"
" }\n"
" ,... More key-value pairs of the above form. For compatibility reasons, a dictionary, which holds the key-value pairs directly, is also\n"
" accepted as second parameter.\n"
" ]\n"
"3. locktime (numeric, optional, default=0) Raw locktime. Non-0 value also locktime-activates inputs\n"
"4. replaceable (boolean, optional, default=false) Marks this transaction as BIP125 replaceable.\n"
" Allows this transaction to be replaced by a transaction with higher fees. If provided, it is an error if explicit sequence numbers are incompatible.\n"
"\nResult:\n"
"\"transaction\" (string) hex string of the transaction\n"
"\nExamples:\n"
+ HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\" \"[{\\\"address\\\":0.01}]\"")
+ HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\" \"[{\\\"data\\\":\\\"00010203\\\"}]\"")
+ HelpExampleRpc("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\", \"[{\\\"address\\\":0.01}]\"")
+ HelpExampleRpc("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\", \"[{\\\"data\\\":\\\"00010203\\\"}]\"")
// clang-format on
);
}
RPCTypeCheck(request.params, {
UniValue::VARR,
UniValueType(), // ARR or OBJ, checked later
UniValue::VNUM,
UniValue::VBOOL
}, true
);
CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], request.params[3]);
return EncodeHexTx(rawTx);
}

3
src/rpc/rawtransaction.h
View file

@ -12,4 +12,7 @@ class UniValue;
/** Sign a transaction with the given keystore and previous transactions */
UniValue SignTransaction(CMutableTransaction& mtx, const UniValue& prevTxs, CBasicKeyStore *keystore, bool tempKeystore, const UniValue& hashType);
/** Create a transaction from univalue parameters */
CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, const UniValue& rbf);
#endif // BITCOIN_RPC_RAWTRANSACTION_H

241
src/wallet/rpcwallet.cpp
View file

@ -3419,6 +3419,122 @@ static UniValue listunspent(const JSONRPCRequest& request)
return results;
}
void FundTransaction(CWallet* const pwallet, CMutableTransaction& tx, CAmount& fee_out, int& change_position, UniValue options)
{
// Make sure the results are valid at least up to the most recent block
// the user could have gotten from another RPC command prior to now
pwallet->BlockUntilSyncedToCurrentChain();
CCoinControl coinControl;
change_position = -1;
bool lockUnspents = false;
UniValue subtractFeeFromOutputs;
std::set<int> setSubtractFeeFromOutputs;
if (!options.isNull()) {
if (options.type() == UniValue::VBOOL) {
// backward compatibility bool only fallback
coinControl.fAllowWatchOnly = options.get_bool();
}
else {
RPCTypeCheckArgument(options, UniValue::VOBJ);
RPCTypeCheckObj(options,
{
{"changeAddress", UniValueType(UniValue::VSTR)},
{"changePosition", UniValueType(UniValue::VNUM)},
{"change_type", UniValueType(UniValue::VSTR)},
{"includeWatching", UniValueType(UniValue::VBOOL)},
{"lockUnspents", UniValueType(UniValue::VBOOL)},
{"feeRate", UniValueType()}, // will be checked below
{"subtractFeeFromOutputs", UniValueType(UniValue::VARR)},
{"replaceable", UniValueType(UniValue::VBOOL)},
{"conf_target", UniValueType(UniValue::VNUM)},
{"estimate_mode", UniValueType(UniValue::VSTR)},
},
true, true);
if (options.exists("changeAddress")) {
CTxDestination dest = DecodeDestination(options["changeAddress"].get_str());
if (!IsValidDestination(dest)) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "changeAddress must be a valid bitcoin address");
}
coinControl.destChange = dest;
}
if (options.exists("changePosition"))
change_position = options["changePosition"].get_int();
if (options.exists("change_type")) {
if (options.exists("changeAddress")) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot specify both changeAddress and address_type options");
}
coinControl.m_change_type = pwallet->m_default_change_type;
if (!ParseOutputType(options["change_type"].get_str(), *coinControl.m_change_type)) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("Unknown change type '%s'", options["change_type"].get_str()));
}
}
if (options.exists("includeWatching"))
coinControl.fAllowWatchOnly = options["includeWatching"].get_bool();
if (options.exists("lockUnspents"))
lockUnspents = options["lockUnspents"].get_bool();
if (options.exists("feeRate"))
{
coinControl.m_feerate = CFeeRate(AmountFromValue(options["feeRate"]));
coinControl.fOverrideFeeRate = true;
}
if (options.exists("subtractFeeFromOutputs"))
subtractFeeFromOutputs = options["subtractFeeFromOutputs"].get_array();
if (options.exists("replaceable")) {
coinControl.m_signal_bip125_rbf = options["replaceable"].get_bool();
}
if (options.exists("conf_target")) {
if (options.exists("feeRate")) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot specify both conf_target and feeRate");
}
coinControl.m_confirm_target = ParseConfirmTarget(options["conf_target"]);
}
if (options.exists("estimate_mode")) {
if (options.exists("feeRate")) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot specify both estimate_mode and feeRate");
}
if (!FeeModeFromString(options["estimate_mode"].get_str(), coinControl.m_fee_mode)) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid estimate_mode parameter");
}
}
}
}
if (tx.vout.size() == 0)
throw JSONRPCError(RPC_INVALID_PARAMETER, "TX must have at least one output");
if (change_position != -1 && (change_position < 0 || (unsigned int)change_position > tx.vout.size()))
throw JSONRPCError(RPC_INVALID_PARAMETER, "changePosition out of bounds");
for (unsigned int idx = 0; idx < subtractFeeFromOutputs.size(); idx++) {
int pos = subtractFeeFromOutputs[idx].get_int();
if (setSubtractFeeFromOutputs.count(pos))
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid parameter, duplicated position: %d", pos));
if (pos < 0)
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid parameter, negative position: %d", pos));
if (pos >= int(tx.vout.size()))
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid parameter, position too large: %d", pos));
setSubtractFeeFromOutputs.insert(pos);
}
std::string strFailReason;
if (!pwallet->FundTransaction(tx, fee_out, change_position, strFailReason, lockUnspents, setSubtractFeeFromOutputs, coinControl)) {
throw JSONRPCError(RPC_WALLET_ERROR, strFailReason);
}
}
static UniValue fundrawtransaction(const JSONRPCRequest& request)
{
std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
@ -3486,100 +3602,7 @@ static UniValue fundrawtransaction(const JSONRPCRequest& request)
+ HelpExampleCli("sendrawtransaction", "\"signedtransactionhex\"")
);
RPCTypeCheck(request.params, {UniValue::VSTR});
// Make sure the results are valid at least up to the most recent block
// the user could have gotten from another RPC command prior to now
pwallet->BlockUntilSyncedToCurrentChain();
CCoinControl coinControl;
int changePosition = -1;
bool lockUnspents = false;
UniValue subtractFeeFromOutputs;
std::set<int> setSubtractFeeFromOutputs;
if (!request.params[1].isNull()) {
if (request.params[1].type() == UniValue::VBOOL) {
// backward compatibility bool only fallback
coinControl.fAllowWatchOnly = request.params[1].get_bool();
}
else {
RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VOBJ, UniValue::VBOOL});
UniValue options = request.params[1];
RPCTypeCheckObj(options,
{
{"changeAddress", UniValueType(UniValue::VSTR)},
{"changePosition", UniValueType(UniValue::VNUM)},
{"change_type", UniValueType(UniValue::VSTR)},
{"includeWatching", UniValueType(UniValue::VBOOL)},
{"lockUnspents", UniValueType(UniValue::VBOOL)},
{"feeRate", UniValueType()}, // will be checked below
{"subtractFeeFromOutputs", UniValueType(UniValue::VARR)},
{"replaceable", UniValueType(UniValue::VBOOL)},
{"conf_target", UniValueType(UniValue::VNUM)},
{"estimate_mode", UniValueType(UniValue::VSTR)},
},
true, true);
if (options.exists("changeAddress")) {
CTxDestination dest = DecodeDestination(options["changeAddress"].get_str());
if (!IsValidDestination(dest)) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "changeAddress must be a valid bitcoin address");
}
coinControl.destChange = dest;
}
if (options.exists("changePosition"))
changePosition = options["changePosition"].get_int();
if (options.exists("change_type")) {
if (options.exists("changeAddress")) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot specify both changeAddress and address_type options");
}
coinControl.m_change_type = pwallet->m_default_change_type;
if (!ParseOutputType(options["change_type"].get_str(), *coinControl.m_change_type)) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("Unknown change type '%s'", options["change_type"].get_str()));
}
}
if (options.exists("includeWatching"))
coinControl.fAllowWatchOnly = options["includeWatching"].get_bool();
if (options.exists("lockUnspents"))
lockUnspents = options["lockUnspents"].get_bool();
if (options.exists("feeRate"))
{
coinControl.m_feerate = CFeeRate(AmountFromValue(options["feeRate"]));
coinControl.fOverrideFeeRate = true;
}
if (options.exists("subtractFeeFromOutputs"))
subtractFeeFromOutputs = options["subtractFeeFromOutputs"].get_array();
if (options.exists("replaceable")) {
coinControl.m_signal_bip125_rbf = options["replaceable"].get_bool();
}
if (options.exists("conf_target")) {
if (options.exists("feeRate")) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot specify both conf_target and feeRate");
}
coinControl.m_confirm_target = ParseConfirmTarget(options["conf_target"]);
}
if (options.exists("estimate_mode")) {
if (options.exists("feeRate")) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot specify both estimate_mode and feeRate");
}
if (!FeeModeFromString(options["estimate_mode"].get_str(), coinControl.m_fee_mode)) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid estimate_mode parameter");
}
}
}
}
RPCTypeCheck(request.params, {UniValue::VSTR, UniValueType(), UniValue::VBOOL});
// parse hex string from parameter
CMutableTransaction tx;
@ -3589,34 +3612,14 @@ static UniValue fundrawtransaction(const JSONRPCRequest& request)
throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
}
if (tx.vout.size() == 0)
throw JSONRPCError(RPC_INVALID_PARAMETER, "TX must have at least one output");
if (changePosition != -1 && (changePosition < 0 || (unsigned int)changePosition > tx.vout.size()))
throw JSONRPCError(RPC_INVALID_PARAMETER, "changePosition out of bounds");
for (unsigned int idx = 0; idx < subtractFeeFromOutputs.size(); idx++) {
int pos = subtractFeeFromOutputs[idx].get_int();
if (setSubtractFeeFromOutputs.count(pos))
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid parameter, duplicated position: %d", pos));
if (pos < 0)
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid parameter, negative position: %d", pos));
if (pos >= int(tx.vout.size()))
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid parameter, position too large: %d", pos));
setSubtractFeeFromOutputs.insert(pos);
}
CAmount nFeeOut;
std::string strFailReason;
if (!pwallet->FundTransaction(tx, nFeeOut, changePosition, strFailReason, lockUnspents, setSubtractFeeFromOutputs, coinControl)) {
throw JSONRPCError(RPC_WALLET_ERROR, strFailReason);
}
CAmount fee;
int change_position;
FundTransaction(pwallet, tx, fee, change_position, request.params[1]);
UniValue result(UniValue::VOBJ);
result.pushKV("hex", EncodeHexTx(tx));
result.pushKV("changepos", changePosition);
result.pushKV("fee", ValueFromAmount(nFeeOut));
result.pushKV("fee", ValueFromAmount(fee));
result.pushKV("changepos", change_position);
return result;
}