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// Copyright (c) 2009-2022 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 <core_io.h>
#include <common/system.h>
#include <consensus/amount.h>
#include <consensus/consensus.h>
#include <consensus/validation.h>
#include <issuance.h>
#include <key_io.h>
#include <policy/discount.h> // ELEMENTS
#include <script/descriptor.h>
#include <script/script.h>
#include <script/sign.h>
#include <script/solver.h>
#include <serialize.h>
#include <streams.h>
#include <undo.h>
#include <univalue.h>
#include <util/check.h>
#include <util/strencodings.h>
#include <secp256k1_rangeproof.h>
#include <map>
#include <string>
#include <vector>
static secp256k1_context* secp256k1_blind_context = nullptr;
class RPCRawTransaction_ECC_Init {
public:
RPCRawTransaction_ECC_Init() {
assert(secp256k1_blind_context == nullptr);
secp256k1_context *ctx = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
assert(ctx != nullptr);
secp256k1_blind_context = ctx;
}
~RPCRawTransaction_ECC_Init() {
secp256k1_context *ctx = secp256k1_blind_context;
secp256k1_blind_context = nullptr;
if (ctx) {
secp256k1_context_destroy(ctx);
}
}
};
static RPCRawTransaction_ECC_Init ecc_init_on_load;
UniValue ValueFromAmount(const CAmount amount)
{
static_assert(COIN > 1);
int64_t quotient = amount / COIN;
int64_t remainder = amount % COIN;
if (amount < 0) {
quotient = -quotient;
remainder = -remainder;
}
return UniValue(UniValue::VNUM,
strprintf("%s%d.%08d", amount < 0 ? "-" : "", quotient, remainder));
}
std::string FormatScript(const CScript& script)
{
std::string ret;
CScript::const_iterator it = script.begin();
opcodetype op;
while (it != script.end()) {
CScript::const_iterator it2 = it;
std::vector<unsigned char> vch;
if (script.GetOp(it, op, vch)) {
if (op == OP_0) {
ret += "0 ";
continue;
} else if ((op >= OP_1 && op <= OP_16) || op == OP_1NEGATE) {
ret += strprintf("%i ", op - OP_1NEGATE - 1);
continue;
} else if (op >= OP_NOP && op <= OP_NOP10) {
std::string str(GetOpName(op));
if (str.substr(0, 3) == std::string("OP_")) {
ret += str.substr(3, std::string::npos) + " ";
continue;
}
}
if (vch.size() > 0) {
ret += strprintf("0x%x 0x%x ", HexStr(MakeByteSpan(std::vector<uint8_t>(it2, it - vch.size()))),
HexStr(MakeByteSpan(std::vector<uint8_t>(it - vch.size(), it))));
} else {
ret += strprintf("0x%x ", HexStr(MakeByteSpan(std::vector<uint8_t>(it2, it))));
}
continue;
}
ret += strprintf("0x%x ", HexStr(MakeByteSpan(std::vector<uint8_t>(it2, script.end()))));
break;
}
return ret.substr(0, ret.empty() ? ret.npos : ret.size() - 1);
}
const std::map<unsigned char, std::string> mapSigHashTypes = {
{static_cast<unsigned char>(SIGHASH_ALL), std::string("ALL")},
{static_cast<unsigned char>(SIGHASH_ALL|SIGHASH_ANYONECANPAY), std::string("ALL|ANYONECANPAY")},
{static_cast<unsigned char>(SIGHASH_NONE), std::string("NONE")},
{static_cast<unsigned char>(SIGHASH_NONE|SIGHASH_ANYONECANPAY), std::string("NONE|ANYONECANPAY")},
{static_cast<unsigned char>(SIGHASH_SINGLE), std::string("SINGLE")},
{static_cast<unsigned char>(SIGHASH_SINGLE|SIGHASH_ANYONECANPAY), std::string("SINGLE|ANYONECANPAY")},
};
std::string SighashToStr(unsigned char sighash_type)
{
const auto& it = mapSigHashTypes.find(sighash_type);
if (it == mapSigHashTypes.end()) return "";
return it->second;
}
/**
* Create the assembly string representation of a CScript object.
* @param[in] script CScript object to convert into the asm string representation.
* @param[in] fAttemptSighashDecode Whether to attempt to decode sighash types on data within the script that matches the format
* of a signature. Only pass true for scripts you believe could contain signatures. For example,
* pass false, or omit the this argument (defaults to false), for scriptPubKeys.
*/
std::string ScriptToAsmStr(const CScript& script, const bool fAttemptSighashDecode)
{
std::string str;
opcodetype opcode;
std::vector<unsigned char> vch;
CScript::const_iterator pc = script.begin();
while (pc < script.end()) {
if (!str.empty()) {
str += " ";
}
if (!script.GetOp(pc, opcode, vch)) {
str += "[error]";
return str;
}
if (0 <= opcode && opcode <= OP_PUSHDATA4) {
if (vch.size() <= static_cast<std::vector<unsigned char>::size_type>(4)) {
str += strprintf("%d", CScriptNum(vch, false).getint());
} else {
// the IsUnspendable check makes sure not to try to decode OP_RETURN data that may match the format of a signature
if (fAttemptSighashDecode && !script.IsUnspendable()) {
std::string strSigHashDecode;
// goal: only attempt to decode a defined sighash type from data that looks like a signature within a scriptSig.
// this won't decode correctly formatted public keys in Pubkey or Multisig scripts due to
// the restrictions on the pubkey formats (see IsCompressedOrUncompressedPubKey) being incongruous with the
// checks in CheckSignatureEncoding.
if (CheckSignatureEncoding(vch, SCRIPT_VERIFY_STRICTENC, nullptr)) {
const unsigned char chSigHashType = vch.back();
const auto it = mapSigHashTypes.find(chSigHashType);
if (it != mapSigHashTypes.end()) {
strSigHashDecode = "[" + it->second + "]";
vch.pop_back(); // remove the sighash type byte. it will be replaced by the decode.
}
}
str += HexStr(MakeByteSpan(vch)) + strSigHashDecode;
} else {
str += HexStr(MakeByteSpan(vch));
}
}
} else {
str += GetOpName(opcode);
}
}
return str;
}
std::string EncodeHexTx(const CTransaction& tx)
{
DataStream ssTx;
ssTx << TX_WITH_WITNESS(tx);
return HexStr(ssTx);
}
UniValue EncodeHexScriptWitness(const CScriptWitness& witness)
{
UniValue witness_hex(UniValue::VARR);
for (const auto &item : witness.stack) {
witness_hex.push_back(HexStr(MakeByteSpan(item)));
}
return witness_hex;
}
// ELEMENTS:
static void SidechainScriptPubKeyToJSON(const CScript& script, UniValue& out, bool include_hex, bool include_addresses, bool is_parent_chain, const SigningProvider* provider)
{
const std::string prefix = is_parent_chain ? "pegout_" : "";
CTxDestination address;
out.pushKV(prefix + "asm", ScriptToAsmStr(script));
if (include_addresses) {
out.pushKV(prefix + "desc", InferDescriptor(script, provider ? *provider : DUMMY_SIGNING_PROVIDER)->ToString());
}
if (include_hex) {
out.pushKV(prefix + "hex", HexStr(script));
}
std::vector<std::vector<unsigned char>> solns;
const TxoutType type{Solver(script, solns)};
if (include_addresses && ExtractDestination(script, address) && type != TxoutType::PUBKEY) {
if (is_parent_chain) {
out.pushKV(prefix + "address", EncodeParentDestination(address));
} else {
out.pushKV(prefix + "address", EncodeDestination(address));
}
}
out.pushKV(prefix + "type", GetTxnOutputType(type));
}
void ScriptToUniv(const CScript& script, UniValue& out, bool include_hex, bool include_addresses, const SigningProvider* provider)
{
SidechainScriptPubKeyToJSON(script, out, include_hex, include_addresses, false, provider);
uint256 pegout_chain;
CScript pegout_scriptpubkey;
if (script.IsPegoutScript(pegout_chain, pegout_scriptpubkey)) {
out.pushKV("pegout_chain", pegout_chain.GetHex());
SidechainScriptPubKeyToJSON(pegout_scriptpubkey, out, include_hex, include_addresses, true, provider);
}
}
void TxToUniv(const CTransaction& tx, const uint256& block_hash, UniValue& entry, bool include_hex, const CTxUndo* txundo, TxVerbosity verbosity)
{
CHECK_NONFATAL(verbosity >= TxVerbosity::SHOW_DETAILS);
entry.pushKV("txid", tx.GetHash().GetHex());
entry.pushKV("hash", tx.GetWitnessHash().GetHex());
if (g_con_elementsmode) {
entry.pushKV("wtxid", tx.GetWitnessHash().GetHex());
entry.pushKV("withash", tx.GetWitnessOnlyHash().GetHex());
}
entry.pushKV("version", tx.version);
entry.pushKV("size", tx.GetTotalSize());
entry.pushKV("vsize", (GetTransactionWeight(tx) + WITNESS_SCALE_FACTOR - 1) / WITNESS_SCALE_FACTOR);
entry.pushKV("weight", GetTransactionWeight(tx));
// ELEMENTS: add discountvsize
if (Params().GetAcceptDiscountCT()) {
entry.pushKV("discountvsize", GetDiscountVirtualTransactionSize(tx));
entry.pushKV("discountweight", GetDiscountTransactionWeight(tx));
}
entry.pushKV("locktime", (int64_t)tx.nLockTime);
UniValue vin{UniValue::VARR};
const bool have_undo = txundo != nullptr;
for (unsigned int i = 0; i < tx.vin.size(); i++) {
const CTxIn& txin = tx.vin[i];
UniValue in(UniValue::VOBJ);
if (tx.IsCoinBase()) {
in.pushKV("coinbase", HexStr(txin.scriptSig));
} else {
in.pushKV("txid", txin.prevout.hash.GetHex());
in.pushKV("vout", (int64_t)txin.prevout.n);
UniValue o(UniValue::VOBJ);
o.pushKV("asm", ScriptToAsmStr(txin.scriptSig, true));
o.pushKV("hex", HexStr(txin.scriptSig));
in.pushKV("scriptSig", o);
in.pushKV("is_pegin", txin.m_is_pegin);
}
if (have_undo) {
const Coin& prev_coin = txundo->vprevout[i];
const CTxOut& prev_txout = prev_coin.out;
if (verbosity == TxVerbosity::SHOW_DETAILS_AND_PREVOUT) {
UniValue o_script_pub_key(UniValue::VOBJ);
ScriptToUniv(prev_txout.scriptPubKey, /*out=*/o_script_pub_key, /*include_hex=*/true, /*include_address=*/true);
UniValue p(UniValue::VOBJ);
p.pushKV("generated", bool(prev_coin.fCoinBase));
p.pushKV("height", uint64_t(prev_coin.nHeight));
if (prev_txout.nValue.IsExplicit()) {
p.pushKV("value", ValueFromAmount(prev_txout.nValue.GetAmount()));
} else {
p.pushKV("value", "<confidential>");
}
p.pushKV("scriptPubKey", o_script_pub_key);
in.pushKV("prevout", p);
}
}
in.pushKV("sequence", (int64_t)txin.nSequence);
// ELEMENTS:
if (tx.witness.vtxinwit.size() > i) {
const CScriptWitness &scriptWitness = tx.witness.vtxinwit[i].scriptWitness;
if (!scriptWitness.IsNull()) {
UniValue txinwitness(UniValue::VARR);
for (const auto &item : scriptWitness.stack) {
txinwitness.push_back(HexStr(MakeByteSpan(item)));
}
in.pushKV("txinwitness", txinwitness);
}
}
if (tx.witness.vtxinwit.size() > i && !tx.witness.vtxinwit[i].m_pegin_witness.IsNull()) {
UniValue pegin_witness(UniValue::VARR);
for (const auto& item : tx.witness.vtxinwit[i].m_pegin_witness.stack) {
pegin_witness.push_back(HexStr(MakeByteSpan(item)));
}
in.pushKV("pegin_witness", pegin_witness);
}
const CAssetIssuance& issuance = txin.assetIssuance;
if (!issuance.IsNull()) {
UniValue issue(UniValue::VOBJ);
issue.pushKV("assetBlindingNonce", issuance.assetBlindingNonce.GetHex());
CAsset asset;
CAsset token;
uint256 entropy;
if (issuance.assetBlindingNonce.IsNull()) {
GenerateAssetEntropy(entropy, txin.prevout, issuance.assetEntropy);
issue.pushKV("assetEntropy", entropy.GetHex());
CalculateAsset(asset, entropy);
CalculateReissuanceToken(token, entropy, issuance.nAmount.IsCommitment());
issue.pushKV("isreissuance", false);
issue.pushKV("token", token.GetHex());
}
else {
issue.pushKV("assetEntropy", issuance.assetEntropy.GetHex());
issue.pushKV("isreissuance", true);
CalculateAsset(asset, issuance.assetEntropy);
}
issue.pushKV("asset", asset.GetHex());
if (issuance.nAmount.IsExplicit()) {
issue.pushKV("assetamount", ValueFromAmount(issuance.nAmount.GetAmount()));
} else if (issuance.nAmount.IsCommitment()) {
issue.pushKV("assetamountcommitment", HexStr(MakeByteSpan(issuance.nAmount.vchCommitment)));
}
if (issuance.nInflationKeys.IsExplicit()) {
issue.pushKV("tokenamount", ValueFromAmount(issuance.nInflationKeys.GetAmount()));
} else if (issuance.nInflationKeys.IsCommitment()) {
issue.pushKV("tokenamountcommitment", HexStr(MakeByteSpan(issuance.nInflationKeys.vchCommitment)));
}
in.pushKV("issuance", issue);
}
// END ELEMENTS
vin.push_back(in);
}
entry.pushKV("vin", std::move(vin));
CAmountMap fee_map{};
UniValue vout(UniValue::VARR);
for (unsigned int i = 0; i < tx.vout.size(); i++) {
const CTxOut& txout = tx.vout[i];
UniValue out(UniValue::VOBJ);
if (txout.nValue.IsExplicit()) {
out.pushKV("value", ValueFromAmount(txout.nValue.GetAmount()));
} else {
int exp;
int mantissa;
uint64_t minv;
uint64_t maxv;
const CTxOutWitness* ptxoutwit = tx.witness.vtxoutwit.size() <= i ? nullptr : &tx.witness.vtxoutwit[i];
if (ptxoutwit) {
if (ptxoutwit->vchRangeproof.size() && secp256k1_rangeproof_info(secp256k1_blind_context, &exp, &mantissa, &minv, &maxv, &ptxoutwit->vchRangeproof[0], ptxoutwit->vchRangeproof.size())) {
if (exp == -1) {
out.pushKV("value", ValueFromAmount((CAmount)minv));
} else {
out.pushKV("value-minimum", ValueFromAmount((CAmount)minv));
out.pushKV("value-maximum", ValueFromAmount((CAmount)maxv));
}
out.pushKV("ct-exponent", exp);
out.pushKV("ct-bits", mantissa);
}
if (ptxoutwit->vchSurjectionproof.size()) {
out.pushKV("surjectionproof", HexStr(MakeByteSpan(ptxoutwit->vchSurjectionproof)));
}
}
out.pushKV("valuecommitment", txout.nValue.GetHex());
}
if (g_con_elementsmode) {
if (txout.IsFee()) {
fee_map[txout.nAsset.GetAsset()] += txout.nValue.GetAmount();
}
if (txout.nAsset.IsExplicit()) {
out.pushKV("asset", txout.nAsset.GetAsset().GetHex());
} else {
out.pushKV("assetcommitment", txout.nAsset.GetHex());
}
out.pushKV("commitmentnonce", txout.nNonce.GetHex());
CPubKey pubkey(txout.nNonce.vchCommitment);
out.pushKV("commitmentnonce_fully_valid", pubkey.IsFullyValid());
}
out.pushKV("n", (int64_t)i);
UniValue o(UniValue::VOBJ);
ScriptToUniv(txout.scriptPubKey, /*out=*/o, /*include_hex=*/true, /*include_address=*/true);
out.pushKV("scriptPubKey", o);
vout.push_back(out);
}
entry.pushKV("vout", std::move(vout));
// ELEMENTS: add fee map rather than single fee. Unlike other areas of the RPC,
// we do not look up labels here and will always use the asset hex (contrast
// `AmountMapToUniv` in rpc/util.cpp. This is because this is a pure function
// so we do not have access to `policyAsset` or `gAssetsDir`. (We will get link
// errors if we try to use these.)
if (g_con_elementsmode) {
UniValue fee_obj(UniValue::VOBJ);
for(std::map<CAsset, CAmount>::const_iterator it = fee_map.begin(); it != fee_map.end(); ++it) {
fee_obj.pushKV(it->first.GetHex(), ValueFromAmount(it->second));
}
entry.pushKV("fee", fee_obj);
}
if (!block_hash.IsNull()) {
entry.pushKV("blockhash", block_hash.GetHex());
}
if (include_hex) {
entry.pushKV("hex", EncodeHexTx(tx)); // The hex-encoded transaction. Used the name "hex" to be consistent with the verbose output of "getrawtransaction".
}
}