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rawtransaction.cpp
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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <asset.h>
#include <block_proof.h>
#include <chain.h>
#include <coins.h>
#include <compat/byteswap.h>
#include <consensus/validation.h>
#include <consensus/tx_verify.h>
#include <core_io.h>
#include <index/txindex.h>
#include <init.h>
#include <key_io.h>
#include <keystore.h>
#include <merkleblock.h>
#include <net.h>
#include <pegins.h>
#include <node/transaction.h>
#include <policy/policy.h>
#include <policy/rbf.h>
#include <primitives/transaction.h>
#include <primitives/bitcoin/merkleblock.h>
#include <primitives/bitcoin/transaction.h>
#include <psbt.h>
#include <rpc/rawtransaction.h>
#include <rpc/server.h>
#include <rpc/util.h>
#include <script/script.h>
#include <script/script_error.h>
#include <script/sign.h>
#include <script/standard.h>
#include <uint256.h>
#include <util/bip32.h>
#include <util/strencodings.h>
#include <validation.h>
#include <validationinterface.h>
#include <confidential_validation.h>
#include <blind.h>
#include <issuance.h>
#include <numeric>
#include <stdint.h>
#include <univalue.h>
static void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry)
{
// Call into TxToUniv() in bitcoin-common to decode the transaction hex.
//
// Blockchain contextual information (confirmations and blocktime) is not
// available to code in bitcoin-common, so we query them here and push the
// data into the returned UniValue.
TxToUniv(tx, uint256(), entry, true, RPCSerializationFlags());
if (!hashBlock.IsNull()) {
LOCK(cs_main);
entry.pushKV("blockhash", hashBlock.GetHex());
CBlockIndex* pindex = LookupBlockIndex(hashBlock);
if (pindex) {
if (chainActive.Contains(pindex)) {
entry.pushKV("confirmations", 1 + chainActive.Height() - pindex->nHeight);
entry.pushKV("time", pindex->GetBlockTime());
entry.pushKV("blocktime", pindex->GetBlockTime());
}
else
entry.pushKV("confirmations", 0);
}
}
}
void RPCCheckPSBTBlinding(const PartiallySignedTransaction& psbtx) {
// Plausibly, we may want a way to let the user continue anyway. However, we
// want to fail by default, to make it as hard as possible to do something
// really dangerous. And since this way of handling blinded PSBTs is going
// away "real soon now" in favor of a better one, no sense in trying too
// hard about it.
for (size_t i = 0; i < psbtx.outputs.size(); ++i) {
const PSBTOutput& output = psbtx.outputs[i];
const CTxOut& txo = psbtx.tx->vout[i];
if (txo.nValue.IsCommitment() || txo.nAsset.IsCommitment()) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "PSBT's 'tx' field may not have pre-blinded outputs.");
}
if (!output.value_commitment.IsCommitment() &&
!output.asset_commitment.IsCommitment() &&
output.value_blinding_factor.IsNull() &&
output.asset_blinding_factor.IsNull()) {
// Nothing blinded, nothing to check.
continue;
} else if (!output.value_commitment.IsCommitment() ||
!output.asset_commitment.IsCommitment() ||
output.value_blinding_factor.IsNull() ||
output.asset_blinding_factor.IsNull()) {
// Something blinded, but not everything? That's not expected.
throw JSONRPCError(RPC_INVALID_PARAMETER, "PSBT has a partially-blinded output. Blinded outputs must be fully blinded.");
}
if (!VerifyConfidentialPair(output.value_commitment, output.asset_commitment, txo.nValue.GetAmount(), txo.nAsset.GetAsset(), output.value_blinding_factor, output.asset_blinding_factor)) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "PSBT's 'tx' field output values do not match blinded output values (or are invalid in some way)! Either there is a bug, or the blinder is attacking you.");
}
}
}
static UniValue getrawtransaction(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 3)
throw std::runtime_error(
RPCHelpMan{
"getrawtransaction",
"\nReturn the raw transaction data.\n"
"\nBy default this function only works for mempool transactions. When called with a blockhash\n"
"argument, getrawtransaction will return the transaction if the specified block is available and\n"
"the transaction is found in that block. When called without a blockhash argument, getrawtransaction\n"
"will return the transaction if it is in the mempool, or if -txindex is enabled and the transaction\n"
"is in a block in the blockchain.\n"
"\nHint: use getmempoolentry to fetch a specific transaction from the mempool.\n"
"Or use gettransaction for wallet transactions.\n"
"\nIf verbose is 'true', returns an Object with information about 'txid'.\n"
"If verbose is 'false' or omitted, returns a string that is serialized, hex-encoded data for 'txid'.\n",
{
{"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The transaction id"},
{"verbose", RPCArg::Type::BOOL, /* default */ "false", "If false, return a string, otherwise return a json object"},
{"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::OMITTED_NAMED_ARG, "The block in which to look for the transaction"},
},
{
RPCResult{"if verbose is not set or set to false",
"\"data\" (string) The serialized, hex-encoded data for 'txid'\n"
},
RPCResult{"if verbose is set to true",
"{\n"
" \"in_active_chain\": b, (bool) Whether specified block is in the active chain or not (only present with explicit \"blockhash\" argument)\n"
" \"hex\" : \"data\", (string) The serialized, hex-encoded data for 'txid'\n"
" \"txid\" : \"id\", (string) The transaction id (same as provided)\n"
" \"hash\" : \"id\", (string) The transaction hash (differs from txid for witness transactions)\n"
" \"size\" : n, (numeric) The serialized transaction size\n"
" \"vsize\" : n, (numeric) The virtual transaction size (differs from size for witness transactions)\n"
" \"weight\" : n, (numeric) The transaction's weight (between vsize*4-3 and vsize*4)\n"
" \"version\" : n, (numeric) The version\n"
" \"locktime\" : ttt, (numeric) The lock time\n"
" \"vin\" : [ (array of json objects)\n"
" {\n"
" \"txid\": \"id\", (string) The transaction id\n"
" \"vout\": n, (numeric) \n"
" \"scriptSig\": { (json object) The script\n"
" \"asm\": \"asm\", (string) asm\n"
" \"hex\": \"hex\" (string) hex\n"
" },\n"
" \"sequence\": n (numeric) The script sequence number\n"
" \"txinwitness\": [\"hex\", ...] (array of string) hex-encoded witness data (if any)\n"
" }\n"
" ,...\n"
" ],\n"
" \"vout\" : [ (array of json objects)\n"
" {\n"
" \"value\" : x.xxx, (numeric) The value in " + CURRENCY_UNIT + "\n"
" \"n\" : n, (numeric) index\n"
" \"scriptPubKey\" : { (json object)\n"
" \"asm\" : \"asm\", (string) the asm\n"
" \"hex\" : \"hex\", (string) the hex\n"
" \"reqSigs\" : n, (numeric) The required sigs\n"
" \"type\" : \"pubkeyhash\", (string) The type, eg 'pubkeyhash'\n"
" \"addresses\" : [ (json array of string)\n"
" \"address\" (string) bitcoin address\n"
" ,...\n"
" ],\n"
" \"pegout_chain\" : \"hex\", (string) (only pegout) Hash of genesis block of parent chain'\n"
" \"pegout_asm\":\"asm\", (string) (only pegout) pegout scriptpubkey (asm)'\n"
" \"pegout_hex\":\"hex\", (string) (only pegout) pegout scriptpubkey (hex)'\n"
" \"pegout_type\" : \"pubkeyhash\", (string) (only pegout) The pegout type, eg 'pubkeyhash'\n"
" \"pegout_addresses\" : [ (json array of string) (only pegout)\n"
" }\n"
" }\n"
" ,...\n"
" ],\n"
" \"blockhash\" : \"hash\", (string) the block hash\n"
" \"confirmations\" : n, (numeric) The confirmations\n"
" \"blocktime\" : ttt (numeric) The block time in seconds since epoch (Jan 1 1970 GMT)\n"
" \"time\" : ttt, (numeric) Same as \"blocktime\"\n"
"}\n"
},
},
RPCExamples{
HelpExampleCli("getrawtransaction", "\"mytxid\"")
+ HelpExampleCli("getrawtransaction", "\"mytxid\" true")
+ HelpExampleRpc("getrawtransaction", "\"mytxid\", true")
+ HelpExampleCli("getrawtransaction", "\"mytxid\" false \"myblockhash\"")
+ HelpExampleCli("getrawtransaction", "\"mytxid\" true \"myblockhash\"")
},
}.ToString());
bool in_active_chain = true;
uint256 hash = ParseHashV(request.params[0], "parameter 1");
CBlockIndex* blockindex = nullptr;
if (!Params().GetConsensus().connect_genesis_outputs &&
hash == Params().GenesisBlock().hashMerkleRoot) {
// Special exception for the genesis block coinbase transaction
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "The genesis block coinbase is not considered an ordinary transaction and cannot be retrieved");
}
// Accept either a bool (true) or a num (>=1) to indicate verbose output.
bool fVerbose = false;
if (!request.params[1].isNull()) {
fVerbose = request.params[1].isNum() ? (request.params[1].get_int() != 0) : request.params[1].get_bool();
}
if (!request.params[2].isNull()) {
LOCK(cs_main);
uint256 blockhash = ParseHashV(request.params[2], "parameter 3");
blockindex = LookupBlockIndex(blockhash);
if (!blockindex) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block hash not found");
}
in_active_chain = chainActive.Contains(blockindex);
}
bool f_txindex_ready = false;
if (g_txindex && !blockindex) {
f_txindex_ready = g_txindex->BlockUntilSyncedToCurrentChain();
}
CTransactionRef tx;
uint256 hash_block;
if (!GetTransaction(hash, tx, Params().GetConsensus(), hash_block, blockindex)) {
std::string errmsg;
if (blockindex) {
if (!(blockindex->nStatus & BLOCK_HAVE_DATA)) {
throw JSONRPCError(RPC_MISC_ERROR, "Block not available");
}
errmsg = "No such transaction found in the provided block";
} else if (!g_txindex) {
errmsg = "No such mempool transaction. Use -txindex to enable blockchain transaction queries";
} else if (!f_txindex_ready) {
errmsg = "No such mempool transaction. Blockchain transactions are still in the process of being indexed";
} else {
errmsg = "No such mempool or blockchain transaction";
}
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, errmsg + ". Use gettransaction for wallet transactions.");
}
if (!fVerbose) {
return EncodeHexTx(CTransaction(*tx), RPCSerializationFlags());
}
UniValue result(UniValue::VOBJ);
if (blockindex) result.pushKV("in_active_chain", in_active_chain);
TxToJSON(*tx, hash_block, result);
return result;
}
static UniValue gettxoutproof(const JSONRPCRequest& request)
{
if (request.fHelp || (request.params.size() != 1 && request.params.size() != 2))
throw std::runtime_error(
RPCHelpMan{"gettxoutproof",
"\nReturns a hex-encoded proof that \"txid\" was included in a block.\n"
"\nNOTE: By default this function only works sometimes. This is when there is an\n"
"unspent output in the utxo for this transaction. To make it always work,\n"
"you need to maintain a transaction index, using the -txindex command line option or\n"
"specify the block in which the transaction is included manually (by blockhash).\n",
{
{"txids", RPCArg::Type::ARR, RPCArg::Optional::NO, "A json array of txids to filter",
{
{"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::OMITTED, "A transaction hash"},
},
},
{"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::OMITTED_NAMED_ARG, "If specified, looks for txid in the block with this hash"},
},
RPCResult{
"\"data\" (string) A string that is a serialized, hex-encoded data for the proof.\n"
},
RPCExamples{""},
}.ToString()
);
std::set<uint256> setTxids;
uint256 oneTxid;
UniValue txids = request.params[0].get_array();
for (unsigned int idx = 0; idx < txids.size(); idx++) {
const UniValue& txid = txids[idx];
uint256 hash(ParseHashV(txid, "txid"));
if (setTxids.count(hash))
throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated txid: ")+txid.get_str());
setTxids.insert(hash);
oneTxid = hash;
}
CBlockIndex* pblockindex = nullptr;
uint256 hashBlock;
if (!request.params[1].isNull()) {
LOCK(cs_main);
hashBlock = ParseHashV(request.params[1], "blockhash");
pblockindex = LookupBlockIndex(hashBlock);
if (!pblockindex) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
}
} else {
LOCK(cs_main);
// Loop through txids and try to find which block they're in. Exit loop once a block is found.
for (const auto& tx : setTxids) {
const Coin& coin = AccessByTxid(*pcoinsTip, tx);
if (!coin.IsSpent()) {
pblockindex = chainActive[coin.nHeight];
break;
}
}
}
// Allow txindex to catch up if we need to query it and before we acquire cs_main.
if (g_txindex && !pblockindex) {
g_txindex->BlockUntilSyncedToCurrentChain();
}
LOCK(cs_main);
if (pblockindex == nullptr)
{
CTransactionRef tx;
if (!GetTransaction(oneTxid, tx, Params().GetConsensus(), hashBlock) || hashBlock.IsNull())
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction not yet in block");
pblockindex = LookupBlockIndex(hashBlock);
if (!pblockindex) {
throw JSONRPCError(RPC_INTERNAL_ERROR, "Transaction index corrupt");
}
}
CBlock block;
if(!ReadBlockFromDisk(block, pblockindex, Params().GetConsensus()))
throw JSONRPCError(RPC_INTERNAL_ERROR, "Can't read block from disk");
unsigned int ntxFound = 0;
for (const auto& tx : block.vtx)
if (setTxids.count(tx->GetHash()))
ntxFound++;
if (ntxFound != setTxids.size())
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Not all transactions found in specified or retrieved block");
CDataStream ssMB(SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
CMerkleBlock mb(block, setTxids);
ssMB << mb;
std::string strHex = HexStr(ssMB.begin(), ssMB.end());
return strHex;
}
static UniValue verifytxoutproof(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 1)
throw std::runtime_error(
RPCHelpMan{"verifytxoutproof",
"\nVerifies that a proof points to a transaction in a block, returning the transaction it commits to\n"
"and throwing an RPC error if the block is not in our best chain\n",
{
{"proof", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The hex-encoded proof generated by gettxoutproof"},
},
RPCResult{
"[\"txid\"] (array, strings) The txid(s) which the proof commits to, or empty array if the proof can not be validated.\n"
},
RPCExamples{""},
}.ToString()
);
CDataStream ssMB(ParseHexV(request.params[0], "proof"), SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
CMerkleBlock merkleBlock;
ssMB >> merkleBlock;
UniValue res(UniValue::VARR);
std::vector<uint256> vMatch;
std::vector<unsigned int> vIndex;
if (merkleBlock.txn.ExtractMatches(vMatch, vIndex) != merkleBlock.header.hashMerkleRoot)
return res;
LOCK(cs_main);
const CBlockIndex* pindex = LookupBlockIndex(merkleBlock.header.GetHash());
if (!pindex || !chainActive.Contains(pindex) || pindex->nTx == 0) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found in chain");
}
// Check if proof is valid, only add results if so
if (pindex->nTx == merkleBlock.txn.GetNumTransactions()) {
for (const uint256& hash : vMatch) {
res.push_back(hash.GetHex());
}
}
return res;
}
template<typename T_tx>
unsigned int GetPeginTxnOutputIndex(const T_tx& txn, const CScript& witnessProgram, const std::vector<std::pair<CScript, CScript>>& fedpegscripts)
{
for (const auto & scripts : fedpegscripts) {
CScript mainchain_script = GetScriptForWitness(calculate_contract(scripts.second, witnessProgram));
if (scripts.first.IsPayToScriptHash()) {
mainchain_script = GetScriptForDestination(ScriptHash(mainchain_script));
}
for (unsigned int nOut = 0; nOut < txn.vout.size(); nOut++)
if (txn.vout[nOut].scriptPubKey == mainchain_script) {
return nOut;
}
}
return txn.vout.size();
}
// Modifies an existing transaction input in-place to be a valid peg-in input, and inserts the witness if deemed valid.
template<typename T_tx_ref, typename T_merkle_block>
static void CreatePegInInputInner(CMutableTransaction& mtx, uint32_t input_idx, T_tx_ref& txBTCRef, T_merkle_block& merkleBlock, const std::set<CScript>& claim_scripts, const std::vector<unsigned char>& txData, const std::vector<unsigned char>& txOutProofData)
{
if ((mtx.vin.size() > input_idx && !mtx.vin[input_idx].scriptSig.empty()) || (mtx.witness.vtxinwit.size() > input_idx && !mtx.witness.vtxinwit[input_idx].IsNull())) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Attempting to add a peg-in to an input that already has a scriptSig or witness");
}
CDataStream ssTx(txData, SER_NETWORK, PROTOCOL_VERSION);
try {
ssTx >> txBTCRef;
}
catch (...) {
throw JSONRPCError(RPC_TYPE_ERROR, "The included bitcoinTx is malformed. Are you sure that is the whole string?");
}
CDataStream ssTxOutProof(txOutProofData, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
try {
ssTxOutProof >> merkleBlock;
}
catch (...) {
throw JSONRPCError(RPC_TYPE_ERROR, "The included txoutproof is malformed. Are you sure that is the whole string?");
}
if (!ssTxOutProof.empty()) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid tx out proof");
}
std::vector<uint256> txHashes;
std::vector<unsigned int> txIndices;
if (merkleBlock.txn.ExtractMatches(txHashes, txIndices) != merkleBlock.header.hashMerkleRoot)
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid tx out proof");
if (txHashes.size() != 1 || txHashes[0] != txBTCRef->GetHash())
throw JSONRPCError(RPC_INVALID_PARAMETER, "The txoutproof must contain bitcoinTx and only bitcoinTx");
CScript witness_script;
unsigned int nOut = txBTCRef->vout.size();
const auto fedpegscripts = GetValidFedpegScripts(chainActive.Tip(), Params().GetConsensus(), true /* nextblock_validation */);
for (const CScript& script : claim_scripts) {
nOut = GetPeginTxnOutputIndex(*txBTCRef, script, fedpegscripts);
if (nOut != txBTCRef->vout.size()) {
witness_script = script;
break;
}
}
if (nOut == txBTCRef->vout.size()) {
if (claim_scripts.size() == 1) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Given claim_script does not match the given Bitcoin transaction.");
} else {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Failed to find output in bitcoinTx to the mainchain_address from getpeginaddress");
}
}
assert(witness_script != CScript());
int version = -1;
std::vector<unsigned char> witness_program;
if (!witness_script.IsWitnessProgram(version, witness_program) || version != 0) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Given or recovered script is not a v0 witness program.");
}
CAmount value = 0;
if (!GetAmountFromParentChainPegin(value, *txBTCRef, nOut)) {
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Amounts to pegin must be explicit and asset must be %s", Params().GetConsensus().parent_pegged_asset.GetHex()));
}
// Add/replace input in mtx
if (mtx.vin.size() <= input_idx) {
mtx.vin.resize(input_idx + 1);
}
mtx.vin[input_idx] = CTxIn(COutPoint(txHashes[0], nOut), CScript(), ~(uint32_t)0);
// Construct pegin proof
CScriptWitness pegin_witness = CreatePeginWitness(value, Params().GetConsensus().pegged_asset, Params().ParentGenesisBlockHash(), witness_script, txBTCRef, merkleBlock);
// Peg-in witness isn't valid, even though the block header is(without depth check)
// We re-check depth before returning with more descriptive result
std::string err;
if (!IsValidPeginWitness(pegin_witness, fedpegscripts, mtx.vin[input_idx].prevout, err, false)) {
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Constructed peg-in witness is invalid: %s", err));
}
// Put input witness in transaction
mtx.vin[input_idx].m_is_pegin = true;
CTxInWitness txinwit;
txinwit.m_pegin_witness = pegin_witness;
if (mtx.witness.vtxinwit.size() <= input_idx) {
mtx.witness.vtxinwit.resize(input_idx + 1);
}
mtx.witness.vtxinwit[input_idx] = txinwit;
}
void CreatePegInInput(CMutableTransaction& mtx, uint32_t input_idx, CTransactionRef& tx_btc, CMerkleBlock& merkle_block, const std::set<CScript>& claim_scripts, const std::vector<unsigned char>& txData, const std::vector<unsigned char>& txOutProofData)
{
CreatePegInInputInner(mtx, input_idx, tx_btc, merkle_block, claim_scripts, txData, txOutProofData);
}
void CreatePegInInput(CMutableTransaction& mtx, uint32_t input_idx, Sidechain::Bitcoin::CTransactionRef& tx_btc, Sidechain::Bitcoin::CMerkleBlock& merkle_block, const std::set<CScript>& claim_scripts, const std::vector<unsigned char>& txData, const std::vector<unsigned char>& txOutProofData)
{
CreatePegInInputInner(mtx, input_idx, tx_btc, merkle_block, claim_scripts, txData, txOutProofData);
}
CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, const UniValue& rbf, const UniValue& assets_in, std::vector<CPubKey>* output_pubkeys_out, bool allow_peg_in)
{
if (inputs_in.isNull() || outputs_in.isNull())
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, arguments 1 and 2 must be non-null");
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 (!locktime.isNull()) {
int64_t nLockTime = locktime.get_int64();
if (nLockTime < 0 || nLockTime > LOCKTIME_MAX)
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, locktime out of range");
rawTx.nLockTime = nLockTime;
}
bool rbfOptIn = rbf.isTrue();
UniValue assets;
if (!assets_in.isNull()) {
assets = assets_in.get_obj();
}
for (unsigned int idx = 0; idx < inputs.size(); idx++) {
const UniValue& input = inputs[idx];
const UniValue& o = input.get_obj();
uint256 txid = ParseHashO(o, "txid");
const UniValue& vout_v = find_value(o, "vout");
if (!vout_v.isNum())
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, missing vout key");
int nOutput = vout_v.get_int();
if (nOutput < 0)
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, vout must be positive");
uint32_t nSequence;
if (rbfOptIn) {
nSequence = MAX_BIP125_RBF_SEQUENCE; /* CTxIn::SEQUENCE_FINAL - 2 */
} else if (rawTx.nLockTime) {
nSequence = CTxIn::SEQUENCE_FINAL - 1;
} else {
nSequence = CTxIn::SEQUENCE_FINAL;
}
// set the sequence number if passed in the parameters object
const UniValue& sequenceObj = find_value(o, "sequence");
if (sequenceObj.isNum()) {
int64_t seqNr64 = sequenceObj.get_int64();
if (seqNr64 < 0 || seqNr64 > CTxIn::SEQUENCE_FINAL) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, sequence number is out of range");
} else {
nSequence = (uint32_t)seqNr64;
}
}
CTxIn in(COutPoint(txid, nOutput), CScript(), nSequence);
rawTx.vin.push_back(in);
// Get the pegin stuff if it's there
const UniValue& pegin_tx = find_value(o, "pegin_bitcoin_tx");
const UniValue& pegin_tx_proof = find_value(o, "pegin_txout_proof");
const UniValue& pegin_script = find_value(o, "pegin_claim_script");
if (!pegin_tx.isNull() && !pegin_tx_proof.isNull() && !pegin_script.isNull() && allow_peg_in) {
if (!IsHex(pegin_script.get_str())) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Given claim_script is not hex.");
}
// If given manually, no need for it to be a witness script
std::vector<unsigned char> claim_script_bytes(ParseHex(pegin_script.get_str()));
CScript claim_script(claim_script_bytes.begin(), claim_script_bytes.end());
std::set<CScript> claim_scripts;
claim_scripts.insert(std::move(claim_script));
if (Params().GetConsensus().ParentChainHasPow()) {
Sidechain::Bitcoin::CTransactionRef tx_btc;
Sidechain::Bitcoin::CMerkleBlock merkle_block;
CreatePegInInput(rawTx, idx, tx_btc, merkle_block, claim_scripts, ParseHex(pegin_tx.get_str()), ParseHex(pegin_tx_proof.get_str()));
if (!CheckParentProofOfWork(merkle_block.header.GetHash(), merkle_block.header.nBits, Params().GetConsensus())) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid tx out proof");
}
} else {
CTransactionRef tx_btc;
CMerkleBlock merkle_block;
CreatePegInInput(rawTx, idx, tx_btc, merkle_block, claim_scripts, ParseHex(pegin_tx.get_str()), ParseHex(pegin_tx_proof.get_str()));
if (!CheckProofSignedParent(merkle_block.header, Params().GetConsensus())) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid tx out proof");
}
}
} else if (!pegin_tx.isNull() || !pegin_tx_proof.isNull() || !pegin_script.isNull()) {
if (allow_peg_in) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Some but not all pegin_ arguments provided");
} else {
throw JSONRPCError(RPC_INVALID_PARAMETER, "pegin_ arguments provided but this command does not support peg-ins");
}
}
}
if (!outputs_is_obj) {
// Translate array of key-value pairs into dict
UniValue outputs_dict = UniValue(UniValue::VOBJ);
for (size_t i = 0; i < outputs.size(); ++i) {
const UniValue& output = outputs[i];
if (!output.isObject()) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, key-value pair not an object as expected");
}
if (output.size() != 1) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, key-value pair must contain exactly one key");
}
outputs_dict.pushKVs(output);
}
outputs = std::move(outputs_dict);
}
// Keep track of the fee output so we can add it in the very end of the transaction.
CTxOut fee_out;
// Duplicate checking
std::set<CTxDestination> destinations;
bool has_data{false};
for (const std::string& name_ : outputs.getKeys()) {
// ELEMENTS:
// Asset defaults to policyAsset
CAsset asset(::policyAsset);
if (!assets.isNull()) {
if (!find_value(assets, name_).isNull()) {
asset = CAsset(ParseHashO(assets, name_));
}
}
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(asset, 0, CScript() << OP_RETURN << data);
rawTx.vout.push_back(out);
if (output_pubkeys_out) {
output_pubkeys_out->push_back(CPubKey());
}
} else if (name_ == "vdata") {
// ELEMENTS: support multi-push OP_RETURN
UniValue vdata = outputs[name_].get_array();
CScript datascript = CScript() << OP_RETURN;
for (size_t i = 0; i < vdata.size(); i++) {
std::vector<unsigned char> data = ParseHexV(vdata[i].get_str(), "Data");
datascript << data;
}
CTxOut out(asset, 0, datascript);
rawTx.vout.push_back(out);
if (output_pubkeys_out) {
output_pubkeys_out->push_back(CPubKey());
}
} else if (name_ == "fee") {
// ELEMENTS: explicit fee outputs
CAmount nAmount = AmountFromValue(outputs[name_]);
fee_out = CTxOut(asset, nAmount, CScript());
} else if (name_ == "burn") {
CScript datascript = CScript() << OP_RETURN;
CAmount nAmount = AmountFromValue(outputs[name_]);
CTxOut out(asset, nAmount, datascript);
rawTx.vout.push_back(out);
if (output_pubkeys_out) {
output_pubkeys_out->push_back(CPubKey());
}
} else {
CTxDestination destination = DecodeDestination(name_);
if (!IsValidDestination(destination)) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ") + name_);
}
if (!destinations.insert(destination).second) {
throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ") + name_);
}
CScript scriptPubKey = GetScriptForDestination(destination);
CAmount nAmount = AmountFromValue(outputs[name_]);
CTxOut out(asset, nAmount, scriptPubKey);
CPubKey blind_pub;
if (IsBlindDestination(destination)) {
blind_pub = GetDestinationBlindingKey(destination);
if (!output_pubkeys_out) {
// Only use the pubkey-in-nonce hack if the caller is not getting the pubkeys the nice way.
out.nNonce.vchCommitment = std::vector<unsigned char>(blind_pub.begin(), blind_pub.end());
}
}
rawTx.vout.push_back(out);
if (output_pubkeys_out) {
output_pubkeys_out->push_back(blind_pub);
}
}
}
// Add fee output in the end.
if (!fee_out.nValue.IsNull() && fee_out.nValue.GetAmount() > 0) {
rawTx.vout.push_back(fee_out);
if (output_pubkeys_out) {
output_pubkeys_out->push_back(CPubKey());
}
}
if (!rbf.isNull() && rawTx.vin.size() > 0 && rbfOptIn != SignalsOptInRBF(CTransaction(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() > 5) {
throw std::runtime_error(
RPCHelpMan{"createrawtransaction",
"\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",
{
{"inputs", RPCArg::Type::ARR, RPCArg::Optional::NO, "A json array of json objects",
{
{"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
{
{"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The transaction id"},
{"vout", RPCArg::Type::NUM, RPCArg::Optional::NO, "The output number"},
{"sequence", RPCArg::Type::NUM, /* default */ "depends on the value of the 'replaceable' and 'locktime' arguments", "The sequence number"},
{"pegin_bitcoin_tx", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The raw bitcoin transaction (in hex) depositing bitcoin to the mainchain_address generated by getpeginaddress"},
{"pegin_txout_proof", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "A rawtxoutproof (in hex) generated by the mainchain daemon's `gettxoutproof` containing a proof of only bitcoin_tx"},
{"pegin_claim_script", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The claim script generated by getpeginaddress."},
},
},
},
},
{"outputs", RPCArg::Type::ARR, RPCArg::Optional::NO, "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.",
{
{"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
{
{"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT},
},
},
{"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
{
{"data", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "A key-value pair. The key must be \"data\", the value is hex-encoded data"},
},
},
{"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
{
{"vdata", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The key is \"vdata\", the value is an array of hex encoded data"},
},
},
{"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
{
{"burn", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "A key-value pair. The key must be \"burn\", the value is the amount that will be burned."},
},
},
{"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
{
{"fee", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "The key is \"fee\", the value the fee output you want to add."},
},
},
},
},
{"locktime", RPCArg::Type::NUM, /* default */ "0", "Raw locktime. Non-0 value also locktime-activates inputs"},
{"replaceable", RPCArg::Type::BOOL, /* 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."},
{"output_assets", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "A json object of addresses to the assets (label or hex ID) used to pay them. (default: bitcoin)",
{
{"address", RPCArg::Type::STR, RPCArg::Optional::OMITTED, "A key-value pair. The key (string) is the bitcoin address, the value is the asset label or asset ID."},
{"fee", RPCArg::Type::STR, RPCArg::Optional::OMITTED, "A key-value pair. The key (string) is the bitcoin address, the value is the asset label or asset ID."},
},
},
},
RPCResult{
"\"transaction\" (string) hex string of the transaction\n"
},
RPCExamples{
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\\\"}]\"")
},
}.ToString());
}
RPCTypeCheck(request.params, {
UniValue::VARR,
UniValueType(), // ARR or OBJ, checked later
UniValue::VNUM,
UniValue::VBOOL,
UniValue::VOBJ
}, true
);
CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], request.params[3], request.params[4]);
return EncodeHexTx(CTransaction(rawTx));
}
static UniValue decoderawtransaction(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
throw std::runtime_error(
RPCHelpMan{"decoderawtransaction",
"\nReturn a JSON object representing the serialized, hex-encoded transaction.\n",
{
{"hexstring", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The transaction hex string"},
{"iswitness", RPCArg::Type::BOOL, /* default */ "depends on heuristic tests", "Whether the transaction hex is a serialized witness transaction\n"
" If iswitness is not present, heuristic tests will be used in decoding"},
},
RPCResult{
"{\n"
" \"txid\" : \"id\", (string) The transaction id\n"
" \"hash\" : \"id\", (string) The transaction hash (differs from txid for witness transactions)\n"
" \"size\" : n, (numeric) The transaction size\n"
" \"vsize\" : n, (numeric) The virtual transaction size (differs from size for witness transactions)\n"
" \"weight\" : n, (numeric) The transaction's weight (between vsize*4 - 3 and vsize*4)\n"
" \"version\" : n, (numeric) The version\n"
" \"locktime\" : ttt, (numeric) The lock time\n"
" \"vin\" : [ (array of json objects)\n"
" {\n"
" \"txid\": \"id\", (string) The transaction id\n"
" \"vout\": n, (numeric) The output number\n"
" \"scriptSig\": { (json object) The script\n"
" \"asm\": \"asm\", (string) asm\n"
" \"hex\": \"hex\" (string) hex\n"
" },\n"
" \"txinwitness\": [\"hex\", ...] (array of string) hex-encoded witness data (if any)\n"
" \"sequence\": n (numeric) The script sequence number\n"
" }\n"
" ,...\n"
" ],\n"
" \"vout\" : [ (array of json objects)\n"
" {\n"
" \"value\" : x.xxx, (numeric) The value in " + CURRENCY_UNIT + "\n"
" \"n\" : n, (numeric) index\n"
" \"scriptPubKey\" : { (json object)\n"
" \"asm\" : \"asm\", (string) the asm\n"
" \"hex\" : \"hex\", (string) the hex\n"
" \"reqSigs\" : n, (numeric) The required sigs\n"
" \"type\" : \"pubkeyhash\", (string) The type, eg 'pubkeyhash'\n"
" \"addresses\" : [ (json array of string)\n"
" \"12tvKAXCxZjSmdNbao16dKXC8tRWfcF5oc\" (string) bitcoin address\n"
" ,...\n"
" ]\n"
" }\n"
" }\n"
" ,...\n"
" ],\n"
"}\n"
},
RPCExamples{
HelpExampleCli("decoderawtransaction", "\"hexstring\"")
+ HelpExampleRpc("decoderawtransaction", "\"hexstring\"")
},
}.ToString());
RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VBOOL});
CMutableTransaction mtx;
bool try_witness = request.params[1].isNull() ? true : request.params[1].get_bool();
bool try_no_witness = request.params[1].isNull() ? true : !request.params[1].get_bool();
if (!DecodeHexTx(mtx, request.params[0].get_str(), try_no_witness, try_witness)) {
throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
}
UniValue result(UniValue::VOBJ);
TxToUniv(CTransaction(std::move(mtx)), uint256(), result, false);
return result;
}
static UniValue decodescript(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 1)
throw std::runtime_error(
RPCHelpMan{"decodescript",
"\nDecode a hex-encoded script.\n",
{
{"hexstring", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "the hex-encoded script"},
},
RPCResult{
"{\n"
" \"asm\":\"asm\", (string) Script public key\n"
" \"hex\":\"hex\", (string) hex-encoded public key\n"
" \"type\":\"type\", (string) The output type\n"
" \"reqSigs\": n, (numeric) The required signatures\n"
" \"addresses\": [ (json array of string)\n"
" \"address\" (string) bitcoin address\n"
" ,...\n"
" ],\n"
" \"p2sh\",\"address\" (string) address of P2SH script wrapping this redeem script (not returned if the script is already a P2SH).\n"
"}\n"
},
RPCExamples{
HelpExampleCli("decodescript", "\"hexstring\"")
+ HelpExampleRpc("decodescript", "\"hexstring\"")
},
}.ToString());
RPCTypeCheck(request.params, {UniValue::VSTR});
UniValue r(UniValue::VOBJ);
CScript script;
if (request.params[0].get_str().size() > 0){
std::vector<unsigned char> scriptData(ParseHexV(request.params[0], "argument"));
script = CScript(scriptData.begin(), scriptData.end());
} else {
// Empty scripts are valid
}
ScriptPubKeyToUniv(script, r, false);
UniValue type;
type = find_value(r, "type");
if (type.isStr() && type.get_str() != "scripthash") {
// P2SH cannot be wrapped in a P2SH. If this script is already a P2SH,
// don't return the address for a P2SH of the P2SH.
r.pushKV("p2sh", EncodeDestination(ScriptHash(CScriptID(script))));
// P2SH and witness programs cannot be wrapped in P2WSH, if this script
// is a witness program, don't return addresses for a segwit programs.
if (type.get_str() == "pubkey" || type.get_str() == "pubkeyhash" || type.get_str() == "multisig" || type.get_str() == "nonstandard" || type.get_str() == "true") {
std::vector<std::vector<unsigned char>> solutions_data;
txnouttype which_type = Solver(script, solutions_data);
// Uncompressed pubkeys cannot be used with segwit checksigs.
// If the script contains an uncompressed pubkey, skip encoding of a segwit program.
if ((which_type == TX_PUBKEY) || (which_type == TX_MULTISIG)) {
for (const auto& solution : solutions_data) {
if ((solution.size() != 1) && !CPubKey(solution).IsCompressed()) {
return r;
}
}
}
UniValue sr(UniValue::VOBJ);
CScript segwitScr;
if (which_type == TX_PUBKEY) {
segwitScr = GetScriptForDestination(WitnessV0KeyHash(Hash160(solutions_data[0].begin(), solutions_data[0].end())));
} else if (which_type == TX_PUBKEYHASH) {
segwitScr = GetScriptForDestination(WitnessV0KeyHash(solutions_data[0]));
} else {
// Scripts that are not fit for P2WPKH are encoded as P2WSH.
// Newer segwit program versions should be considered when then become available.
segwitScr = GetScriptForDestination(WitnessV0ScriptHash(script));
}
ScriptPubKeyToUniv(segwitScr, sr, true);
sr.pushKV("p2sh-segwit", EncodeDestination(ScriptHash(CScriptID(segwitScr))));
r.pushKV("segwit", sr);
}
}
return r;
}
/** Pushes a JSON object for script verification or signing errors to vErrorsRet. */
static void TxInErrorToJSON(const CTxIn& txin, const CTxInWitness& txinwit, UniValue& vErrorsRet, const std::string& strMessage)
{
UniValue entry(UniValue::VOBJ);
entry.pushKV("txid", txin.prevout.hash.ToString());
entry.pushKV("vout", (uint64_t)txin.prevout.n);
UniValue witness(UniValue::VARR);
for (unsigned int i = 0; i < txinwit.scriptWitness.stack.size(); i++) {
witness.push_back(HexStr(txinwit.scriptWitness.stack[i].begin(), txinwit.scriptWitness.stack[i].end()));
}
entry.pushKV("witness", witness);
entry.pushKV("scriptSig", HexStr(txin.scriptSig.begin(), txin.scriptSig.end()));
entry.pushKV("sequence", (uint64_t)txin.nSequence);
entry.pushKV("error", strMessage);
vErrorsRet.push_back(entry);
}
static UniValue combinerawtransaction(const JSONRPCRequest& request)