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core_write.cpp
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// Copyright (c) 2009-2015 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 "base58.h"
#include "primitives/transaction.h"
#include "script/script.h"
#include "script/standard.h"
#include "serialize.h"
#include "streams.h"
#include <univalue.h>
#include "util.h"
#include "utilmoneystr.h"
#include "utilstrencodings.h"
#include <boost/assign/list_of.hpp>
#include <boost/foreach.hpp>
using namespace std;
string FormatScript(const CScript& script)
{
string ret;
CScript::const_iterator it = script.begin();
opcodetype op;
while (it != script.end()) {
CScript::const_iterator it2 = it;
vector<unsigned char> vch;
if (script.GetOp2(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) {
string str(GetOpName(op));
if (str.substr(0, 3) == string("OP_")) {
ret += str.substr(3, string::npos) + " ";
continue;
}
}
if (vch.size() > 0) {
ret += strprintf("0x%x 0x%x ", HexStr(it2, it - vch.size()), HexStr(it - vch.size(), it));
} else {
ret += strprintf("0x%x ", HexStr(it2, it));
}
continue;
}
ret += strprintf("0x%x ", HexStr(it2, script.end()));
break;
}
return ret.substr(0, ret.size() - 1);
}
const map<unsigned char, string> mapSigHashTypes =
boost::assign::map_list_of
(static_cast<unsigned char>(SIGHASH_ALL), string("ALL"))
(static_cast<unsigned char>(SIGHASH_ALL|SIGHASH_ANYONECANPAY), string("ALL|ANYONECANPAY"))
(static_cast<unsigned char>(SIGHASH_NONE), string("NONE"))
(static_cast<unsigned char>(SIGHASH_NONE|SIGHASH_ANYONECANPAY), string("NONE|ANYONECANPAY"))
(static_cast<unsigned char>(SIGHASH_SINGLE), string("SINGLE"))
(static_cast<unsigned char>(SIGHASH_SINGLE|SIGHASH_ANYONECANPAY), string("SINGLE|ANYONECANPAY"))
;
/**
* 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.
*/
string ScriptToAsmStr(const CScript& script, const bool fAttemptSighashDecode)
{
string str;
opcodetype opcode;
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<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()) {
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, NULL)) {
const unsigned char chSigHashType = vch.back();
if (mapSigHashTypes.count(chSigHashType)) {
strSigHashDecode = "[" + mapSigHashTypes.find(chSigHashType)->second + "]";
vch.pop_back(); // remove the sighash type byte. it will be replaced by the decode.
}
}
str += HexStr(vch) + strSigHashDecode;
} else {
str += HexStr(vch);
}
}
} else {
str += GetOpName(opcode);
}
}
return str;
}
string EncodeHexTx(const CTransaction& tx)
{
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
ssTx << tx;
return HexStr(ssTx.begin(), ssTx.end());
}
void ScriptPubKeyToUniv(const CScript& scriptPubKey,
UniValue& out, bool fIncludeHex)
{
txnouttype type;
vector<CTxDestination> addresses;
int nRequired;
out.pushKV("asm", ScriptToAsmStr(scriptPubKey));
if (fIncludeHex)
out.pushKV("hex", HexStr(scriptPubKey.begin(), scriptPubKey.end()));
if (!ExtractDestinations(scriptPubKey, type, addresses, nRequired)) {
out.pushKV("type", GetTxnOutputType(type));
return;
}
out.pushKV("reqSigs", nRequired);
out.pushKV("type", GetTxnOutputType(type));
UniValue a(UniValue::VARR);
BOOST_FOREACH(const CTxDestination& addr, addresses)
a.push_back(CBitcoinAddress(addr).ToString());
out.pushKV("addresses", a);
}
void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry)
{
entry.pushKV("txid", tx.GetHash().GetHex());
entry.pushKV("version", tx.nVersion);
entry.pushKV("locktime", (int64_t)tx.nLockTime);
UniValue vin(UniValue::VARR);
BOOST_FOREACH(const CTxIn& txin, tx.vin) {
UniValue in(UniValue::VOBJ);
if (tx.IsCoinBase())
in.pushKV("coinbase", HexStr(txin.scriptSig.begin(), txin.scriptSig.end()));
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.begin(), txin.scriptSig.end()));
in.pushKV("scriptSig", o);
}
in.pushKV("sequence", (int64_t)txin.nSequence);
vin.push_back(in);
}
entry.pushKV("vin", vin);
UniValue vout(UniValue::VARR);
for (unsigned int i = 0; i < tx.vout.size(); i++) {
const CTxOut& txout = tx.vout[i];
UniValue out(UniValue::VOBJ);
UniValue outValue(UniValue::VNUM, FormatMoney(txout.nValue));
out.pushKV("value", outValue);
out.pushKV("n", (int64_t)i);
UniValue o(UniValue::VOBJ);
ScriptPubKeyToUniv(txout.scriptPubKey, o, true);
out.pushKV("scriptPubKey", o);
vout.push_back(out);
}
entry.pushKV("vout", vout);
if (!hashBlock.IsNull())
entry.pushKV("blockhash", hashBlock.GetHex());
entry.pushKV("hex", EncodeHexTx(tx)); // the hex-encoded transaction. used the name "hex" to be consistent with the verbose output of "getrawtransaction".
}

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core_write.cpp (7 KB)

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