4cef8e0593
984d72ec65 Return the script type from Solver (Ben Woosley)
Pull request description:
Because false is synonymous with TX_NONSTANDARD, this conveys the same
information and makes the handling explicitly based on script type,
simplifying each call site.
Prior to this change it was common for the return value to be ignored, or for the
return value and TX_NONSTANDARD to be redundantly handled.
Tree-SHA512: 31864f856b8cb75f4b782d12678070e8b1cfe9665c6f57cfb25e7ac8bcea8a22f9a78d7c8cf0101c841f2a612400666fb91798bffe88de856e98b873703b0965
237 lines
9.1 KiB
C++
237 lines
9.1 KiB
C++
// Copyright (c) 2009-2018 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <core_io.h>
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#include <consensus/consensus.h>
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#include <consensus/validation.h>
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#include <key_io.h>
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#include <script/script.h>
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#include <script/standard.h>
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#include <serialize.h>
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#include <streams.h>
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#include <univalue.h>
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#include <util.h>
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#include <utilmoneystr.h>
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#include <utilstrencodings.h>
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UniValue ValueFromAmount(const CAmount& amount)
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{
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bool sign = amount < 0;
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int64_t n_abs = (sign ? -amount : amount);
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int64_t quotient = n_abs / COIN;
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int64_t remainder = n_abs % COIN;
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return UniValue(UniValue::VNUM,
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strprintf("%s%d.%08d", sign ? "-" : "", quotient, remainder));
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}
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std::string FormatScript(const CScript& script)
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{
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std::string ret;
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CScript::const_iterator it = script.begin();
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opcodetype op;
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while (it != script.end()) {
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CScript::const_iterator it2 = it;
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std::vector<unsigned char> vch;
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if (script.GetOp(it, op, vch)) {
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if (op == OP_0) {
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ret += "0 ";
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continue;
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} else if ((op >= OP_1 && op <= OP_16) || op == OP_1NEGATE) {
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ret += strprintf("%i ", op - OP_1NEGATE - 1);
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continue;
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} else if (op >= OP_NOP && op <= OP_NOP10) {
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std::string str(GetOpName(op));
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if (str.substr(0, 3) == std::string("OP_")) {
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ret += str.substr(3, std::string::npos) + " ";
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continue;
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}
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}
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if (vch.size() > 0) {
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ret += strprintf("0x%x 0x%x ", HexStr(it2, it - vch.size()), HexStr(it - vch.size(), it));
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} else {
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ret += strprintf("0x%x ", HexStr(it2, it));
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}
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continue;
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}
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ret += strprintf("0x%x ", HexStr(it2, script.end()));
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break;
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}
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return ret.substr(0, ret.size() - 1);
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}
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const std::map<unsigned char, std::string> mapSigHashTypes = {
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{static_cast<unsigned char>(SIGHASH_ALL), std::string("ALL")},
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{static_cast<unsigned char>(SIGHASH_ALL|SIGHASH_ANYONECANPAY), std::string("ALL|ANYONECANPAY")},
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{static_cast<unsigned char>(SIGHASH_NONE), std::string("NONE")},
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{static_cast<unsigned char>(SIGHASH_NONE|SIGHASH_ANYONECANPAY), std::string("NONE|ANYONECANPAY")},
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{static_cast<unsigned char>(SIGHASH_SINGLE), std::string("SINGLE")},
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{static_cast<unsigned char>(SIGHASH_SINGLE|SIGHASH_ANYONECANPAY), std::string("SINGLE|ANYONECANPAY")},
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};
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std::string SighashToStr(unsigned char sighash_type)
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{
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const auto& it = mapSigHashTypes.find(sighash_type);
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if (it == mapSigHashTypes.end()) return "";
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return it->second;
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}
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/**
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* Create the assembly string representation of a CScript object.
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* @param[in] script CScript object to convert into the asm string representation.
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* @param[in] fAttemptSighashDecode Whether to attempt to decode sighash types on data within the script that matches the format
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* of a signature. Only pass true for scripts you believe could contain signatures. For example,
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* pass false, or omit the this argument (defaults to false), for scriptPubKeys.
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*/
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std::string ScriptToAsmStr(const CScript& script, const bool fAttemptSighashDecode)
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{
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std::string str;
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opcodetype opcode;
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std::vector<unsigned char> vch;
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CScript::const_iterator pc = script.begin();
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while (pc < script.end()) {
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if (!str.empty()) {
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str += " ";
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}
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if (!script.GetOp(pc, opcode, vch)) {
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str += "[error]";
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return str;
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}
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if (0 <= opcode && opcode <= OP_PUSHDATA4) {
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if (vch.size() <= static_cast<std::vector<unsigned char>::size_type>(4)) {
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str += strprintf("%d", CScriptNum(vch, false).getint());
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} else {
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// the IsUnspendable check makes sure not to try to decode OP_RETURN data that may match the format of a signature
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if (fAttemptSighashDecode && !script.IsUnspendable()) {
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std::string strSigHashDecode;
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// goal: only attempt to decode a defined sighash type from data that looks like a signature within a scriptSig.
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// this won't decode correctly formatted public keys in Pubkey or Multisig scripts due to
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// the restrictions on the pubkey formats (see IsCompressedOrUncompressedPubKey) being incongruous with the
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// checks in CheckSignatureEncoding.
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if (CheckSignatureEncoding(vch, SCRIPT_VERIFY_STRICTENC, nullptr)) {
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const unsigned char chSigHashType = vch.back();
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if (mapSigHashTypes.count(chSigHashType)) {
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strSigHashDecode = "[" + mapSigHashTypes.find(chSigHashType)->second + "]";
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vch.pop_back(); // remove the sighash type byte. it will be replaced by the decode.
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}
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}
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str += HexStr(vch) + strSigHashDecode;
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} else {
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str += HexStr(vch);
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}
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}
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} else {
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str += GetOpName(opcode);
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}
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}
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return str;
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}
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std::string EncodeHexTx(const CTransaction& tx, const int serializeFlags)
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{
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CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION | serializeFlags);
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ssTx << tx;
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return HexStr(ssTx.begin(), ssTx.end());
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}
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void ScriptToUniv(const CScript& script, UniValue& out, bool include_address)
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{
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out.pushKV("asm", ScriptToAsmStr(script));
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out.pushKV("hex", HexStr(script.begin(), script.end()));
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std::vector<std::vector<unsigned char>> solns;
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txnouttype type = Solver(script, solns);
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out.pushKV("type", GetTxnOutputType(type));
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CTxDestination address;
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if (include_address && ExtractDestination(script, address)) {
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out.pushKV("address", EncodeDestination(address));
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}
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}
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void ScriptPubKeyToUniv(const CScript& scriptPubKey,
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UniValue& out, bool fIncludeHex)
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{
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txnouttype type;
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std::vector<CTxDestination> addresses;
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int nRequired;
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out.pushKV("asm", ScriptToAsmStr(scriptPubKey));
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if (fIncludeHex)
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out.pushKV("hex", HexStr(scriptPubKey.begin(), scriptPubKey.end()));
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if (!ExtractDestinations(scriptPubKey, type, addresses, nRequired)) {
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out.pushKV("type", GetTxnOutputType(type));
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return;
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}
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out.pushKV("reqSigs", nRequired);
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out.pushKV("type", GetTxnOutputType(type));
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UniValue a(UniValue::VARR);
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for (const CTxDestination& addr : addresses) {
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a.push_back(EncodeDestination(addr));
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}
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out.pushKV("addresses", a);
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}
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void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry, bool include_hex, int serialize_flags)
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{
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entry.pushKV("txid", tx.GetHash().GetHex());
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entry.pushKV("hash", tx.GetWitnessHash().GetHex());
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entry.pushKV("version", tx.nVersion);
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entry.pushKV("size", (int)::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION));
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entry.pushKV("vsize", (GetTransactionWeight(tx) + WITNESS_SCALE_FACTOR - 1) / WITNESS_SCALE_FACTOR);
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entry.pushKV("weight", GetTransactionWeight(tx));
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entry.pushKV("locktime", (int64_t)tx.nLockTime);
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UniValue vin(UniValue::VARR);
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for (unsigned int i = 0; i < tx.vin.size(); i++) {
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const CTxIn& txin = tx.vin[i];
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UniValue in(UniValue::VOBJ);
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if (tx.IsCoinBase())
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in.pushKV("coinbase", HexStr(txin.scriptSig.begin(), txin.scriptSig.end()));
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else {
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in.pushKV("txid", txin.prevout.hash.GetHex());
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in.pushKV("vout", (int64_t)txin.prevout.n);
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UniValue o(UniValue::VOBJ);
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o.pushKV("asm", ScriptToAsmStr(txin.scriptSig, true));
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o.pushKV("hex", HexStr(txin.scriptSig.begin(), txin.scriptSig.end()));
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in.pushKV("scriptSig", o);
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if (!tx.vin[i].scriptWitness.IsNull()) {
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UniValue txinwitness(UniValue::VARR);
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for (const auto& item : tx.vin[i].scriptWitness.stack) {
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txinwitness.push_back(HexStr(item.begin(), item.end()));
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}
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in.pushKV("txinwitness", txinwitness);
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}
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}
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in.pushKV("sequence", (int64_t)txin.nSequence);
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vin.push_back(in);
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}
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entry.pushKV("vin", vin);
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UniValue vout(UniValue::VARR);
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for (unsigned int i = 0; i < tx.vout.size(); i++) {
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const CTxOut& txout = tx.vout[i];
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UniValue out(UniValue::VOBJ);
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out.pushKV("value", ValueFromAmount(txout.nValue));
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out.pushKV("n", (int64_t)i);
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UniValue o(UniValue::VOBJ);
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ScriptPubKeyToUniv(txout.scriptPubKey, o, true);
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out.pushKV("scriptPubKey", o);
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vout.push_back(out);
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}
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entry.pushKV("vout", vout);
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if (!hashBlock.IsNull())
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entry.pushKV("blockhash", hashBlock.GetHex());
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if (include_hex) {
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entry.pushKV("hex", EncodeHexTx(tx, serialize_flags)); // The hex-encoded transaction. Used the name "hex" to be consistent with the verbose output of "getrawtransaction".
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}
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}
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