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BtcUtils.h
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BtcUtils.h
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////////////////////////////////////////////////////////////////////////////////
// //
// Copyright (C) 2011-2014, Armory Technologies, Inc. //
// Distributed under the GNU Affero General Public License (AGPL v3) //
// See LICENSE or http://www.gnu.org/licenses/agpl.html //
// //
////////////////////////////////////////////////////////////////////////////////
#ifndef _BTCUTILS_H_
#define _BTCUTILS_H_
#include <stdio.h>
#include <iostream>
#include <vector>
#include <list>
#include <string>
#include <sstream>
#include <assert.h>
#include <cmath>
#include <time.h>
#include <algorithm>
#include <stdexcept>
#include "BinaryData.h"
#include "cryptlib.h"
#include "sha.h"
#include "ripemd.h"
#include "UniversalTimer.h"
#include "log.h"
#define HEADER_SIZE 80
#define COIN 100000000ULL
#define NBLOCKS_REGARDED_AS_RESCAN 144
#define MIN_CONFIRMATIONS 6
#define COINBASE_MATURITY 120
#define TX_0_UNCONFIRMED 0
#define TX_NOT_EXIST -1
#define TX_OFF_MAIN_BRANCH -2
#define HashString BinaryData
#define HashStringRef BinaryDataRef
#ifdef _DEBUG
#define PDEBUG(s) (cout << s << endl)
#define PDEBUG2(s1, s2) (cout << s1 << " " << s2 << endl)
#define PDEBUG3(s1, s2, s3) (cout << s1 << " " << s2 << " " << s3 << endl)
#else
#define PDEBUG(s)
#define PDEBUG2(s1, s2)
#define PDEBUG3(s1, s2, s3)
#endif
#define FILE_DOES_NOT_EXIST UINT64_MAX
#define TESTNET_MAGIC_BYTES "0b110907"
#define TESTNET_GENESIS_HASH_HEX "43497fd7f826957108f4a30fd9cec3aeba79972084e90ead01ea330900000000"
#define TESTNET_GENESIS_TX_HASH_HEX "3ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a"
#define MAINNET_MAGIC_BYTES "f9beb4d9"
#define MAINNET_GENESIS_HASH_HEX "6fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d6190000000000"
#define MAINNET_GENESIS_TX_HASH_HEX "3ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a"
#define BITMASK(X) (2**X - 1)
#define HASH160PREFIX WRITE_UINT8_LE((uint8_t)SCRIPT_PREFIX_HASH160)
#define P2SHPREFIX WRITE_UINT8_LE((uint8_t)SCRIPT_PREFIX_P2SH)
#define MSIGPREFIX WRITE_UINT8_LE((uint8_t)SCRIPT_PREFIX_MULTISIG)
#define NONSTDPREFIX WRITE_UINT8_LE((uint8_t)SCRIPT_PREFIX_NONSTD)
// Really, these defs are just for making it painfully clear in the
// code what you are attempting to compare. I'm constantly messing
// up == and != when trying to read through the code.
#define KEY_NOT_IN_MAP(KEY,MAP) (MAP.find(KEY) == MAP.end())
#define KEY_IN_MAP(KEY,MAP) (MAP.find(KEY) != MAP.end())
#define ITER_NOT_IN_MAP(ITER,MAP) (ITER == MAP.end())
#define ITER_IN_MAP(ITER,MAP) (ITER != MAP.end())
class BinaryData;
class BinaryDataRef;
typedef enum
{
TXOUT_SCRIPT_STDHASH160,
TXOUT_SCRIPT_STDPUBKEY65,
TXOUT_SCRIPT_STDPUBKEY33,
TXOUT_SCRIPT_MULTISIG,
TXOUT_SCRIPT_P2SH,
TXOUT_SCRIPT_NONSTANDARD,
} TXOUT_SCRIPT_TYPE;
typedef enum
{
TXIN_SCRIPT_STDUNCOMPR,
TXIN_SCRIPT_STDCOMPR,
TXIN_SCRIPT_COINBASE,
TXIN_SCRIPT_SPENDPUBKEY,
TXIN_SCRIPT_SPENDMULTI,
TXIN_SCRIPT_SPENDP2SH,
TXIN_SCRIPT_NONSTANDARD
} TXIN_SCRIPT_TYPE;
typedef enum
{
SCRIPT_PREFIX_HASH160=0x00,
SCRIPT_PREFIX_P2SH=0x05,
SCRIPT_PREFIX_MULTISIG=0xfe,
SCRIPT_PREFIX_NONSTD=0xff,
} SCRIPT_PREFIX;
enum OPCODETYPE
{
// push value
OP_0=0,
OP_FALSE=OP_0,
OP_PUSHDATA1=76,
OP_PUSHDATA2,
OP_PUSHDATA4,
OP_1NEGATE,
OP_RESERVED,
OP_1,
OP_TRUE=OP_1,
OP_2,
OP_3,
OP_4,
OP_5,
OP_6,
OP_7,
OP_8,
OP_9,
OP_10,
OP_11,
OP_12,
OP_13,
OP_14,
OP_15,
OP_16,
// control
OP_NOP,
OP_VER,
OP_IF,
OP_NOTIF,
OP_VERIF,
OP_VERNOTIF,
OP_ELSE,
OP_ENDIF,
OP_VERIFY,
OP_RETURN,
// stack ops
OP_TOALTSTACK,
OP_FROMALTSTACK,
OP_2DROP,
OP_2DUP,
OP_3DUP,
OP_2OVER,
OP_2ROT,
OP_2SWAP,
OP_IFDUP,
OP_DEPTH,
OP_DROP,
OP_DUP,
OP_NIP,
OP_OVER,
OP_PICK,
OP_ROLL,
OP_ROT,
OP_SWAP,
OP_TUCK,
// splice ops
OP_CAT,
OP_SUBSTR,
OP_LEFT,
OP_RIGHT,
OP_SIZE,
// bit logic
OP_INVERT,
OP_AND,
OP_OR,
OP_XOR,
OP_EQUAL,
OP_EQUALVERIFY,
OP_RESERVED1,
OP_RESERVED2,
// numeric
OP_1ADD,
OP_1SUB,
OP_2MUL,
OP_2DIV,
OP_NEGATE,
OP_ABS,
OP_NOT,
OP_0NOTEQUAL,
OP_ADD,
OP_SUB,
OP_MUL,
OP_DIV,
OP_MOD,
OP_LSHIFT,
OP_RSHIFT,
OP_BOOLAND,
OP_BOOLOR,
OP_NUMEQUAL,
OP_NUMEQUALVERIFY,
OP_NUMNOTEQUAL,
OP_LESSTHAN,
OP_GREATERTHAN,
OP_LESSTHANOREQUAL,
OP_GREATERTHANOREQUAL,
OP_MIN,
OP_MAX,
OP_WITHIN,
// crypto
OP_RIPEMD160,
OP_SHA1,
OP_SHA256,
OP_HASH160,
OP_HASH256,
OP_CODESEPARATOR,
OP_CHECKSIG,
OP_CHECKSIGVERIFY,
OP_CHECKMULTISIG,
OP_CHECKMULTISIGVERIFY,
// expansion
OP_NOP1,
OP_NOP2,
OP_NOP3,
OP_NOP4,
OP_NOP5,
OP_NOP6,
OP_NOP7,
OP_NOP8,
OP_NOP9,
OP_NOP10,
// template matching params
OP_PUBKEYHASH = 0xfd,
OP_PUBKEY = 0xfe,
OP_INVALIDOPCODE = 0xff,
};
class BlockDeserializingException : public runtime_error
{
public:
BlockDeserializingException(const string &what="")
: runtime_error(what)
{ }
};
// This class holds only static methods.
// NOTE: added default ctor and a few non-static, to support SWIG
// (-classic SWIG doesn't support static methods)
class BtcUtils
{
public:
// Block of code to be called by SWIG -- i.e. made available to python
BtcUtils(void) {}
BinaryData hash256(BinaryData const & str) {return getHash256(str);}
BinaryData hash160(BinaryData const & str) {return getHash160(str);}
static BinaryData BadAddress_;
static BinaryData EmptyHash_;
/////////////////////////////////////////////////////////////////////////////
static BinaryData BadAddress(void) { return BadAddress_; }
static BinaryData EmptyHash(void) { return EmptyHash_; }
/////////////////////////////////////////////////////////////////////////////
static pair<uint64_t, uint8_t> readVarInt(BinaryRefReader & brr)
{
uint64_t outVal;
uint32_t outLen;
outVal = readVarInt(brr.getCurrPtr(), &outLen);
brr.advance(outLen);
return pair<uint64_t, uint8_t>(outVal, (uint8_t)outLen);
}
/////////////////////////////////////////////////////////////////////////////
static uint64_t readVarInt(uint8_t const * strmPtr, uint32_t* lenOutPtr=NULL)
{
uint8_t firstByte = strmPtr[0];
if(firstByte < 0xfd)
{
if(lenOutPtr != NULL)
*lenOutPtr = 1;
return firstByte;
}
if(firstByte == 0xfd)
{
if(lenOutPtr != NULL)
*lenOutPtr = 3;
return READ_UINT16_LE(strmPtr+1);
}
else if(firstByte == 0xfe)
{
if(lenOutPtr != NULL)
*lenOutPtr = 5;
return READ_UINT32_LE(strmPtr+1);
}
else //if(firstByte == 0xff)
{
if(lenOutPtr != NULL)
*lenOutPtr = 9;
return READ_UINT64_LE(strmPtr+1);
}
}
/////////////////////////////////////////////////////////////////////////////
static uint64_t readVarInt(uint8_t const * strmPtr, size_t remaining, uint32_t* lenOutPtr=NULL)
{
if (remaining < 1)
throw BlockDeserializingException();
uint8_t firstByte = strmPtr[0];
if(firstByte < 0xfd)
{
if(lenOutPtr != NULL)
*lenOutPtr = 1;
return firstByte;
}
if(firstByte == 0xfd)
{
if (remaining < 3)
throw BlockDeserializingException();
if(lenOutPtr != NULL)
*lenOutPtr = 3;
return READ_UINT16_LE(strmPtr+1);
}
else if(firstByte == 0xfe)
{
if (remaining < 5)
throw BlockDeserializingException();
if(lenOutPtr != NULL)
*lenOutPtr = 5;
return READ_UINT32_LE(strmPtr+1);
}
else //if(firstByte == 0xff)
{
if (remaining < 9)
throw BlockDeserializingException();
if(lenOutPtr != NULL)
*lenOutPtr = 9;
return READ_UINT64_LE(strmPtr+1);
}
}
/////////////////////////////////////////////////////////////////////////////
static inline uint32_t readVarIntLength(uint8_t const * strmPtr)
{
uint8_t firstByte = strmPtr[0];
if(firstByte < 0xfd)
return 1;
switch(firstByte)
{
case 0xfd: return 3;
case 0xfe: return 5;
case 0xff: return 9;
}
return -1; // we should never get here
}
/////////////////////////////////////////////////////////////////////////////
static inline uint32_t calcVarIntSize(uint64_t regularInteger)
{
if(regularInteger < 0xfd)
return 1;
else if(regularInteger <= 0xffff)
return 3;
else if(regularInteger <= 0xffffffff)
return 5;
else
return 9;
}
/////////////////////////////////////////////////////////////////////////////
static uint64_t GetFileSize(char const * filename)
{
return GetFileSize(string(filename));
}
/////////////////////////////////////////////////////////////////////////////
static uint64_t GetFileSize(string filename)
{
ifstream is(OS_TranslatePath(filename.c_str()), ios::in|ios::binary);
if(!is.is_open())
return FILE_DOES_NOT_EXIST;
is.seekg(0, ios::end);
uint64_t filesize = (size_t)is.tellg();
is.close();
return filesize;
}
/////////////////////////////////////////////////////////////////////////////
static string numToStrWCommas(int64_t fullNum)
{
uint64_t num = fullNum;
num *= (fullNum < 0 ? -1 : 1);
vector<uint32_t> triplets;
do
{
int bottom3 = (num % 1000);
triplets.push_back( bottom3 );
num = (num - bottom3) / 1000;
} while(num>=1);
stringstream out;
out << (fullNum < 0 ? "-" : "");
uint32_t nt = triplets.size()-1;
char t[4];
for(uint32_t i=0; i<=nt; i++)
{
if(i==0)
sprintf(t, "%d", triplets[nt-i]);
else
sprintf(t, "%03d", triplets[nt-i]);
out << string(t);
if(i != nt)
out << ",";
}
return out.str();
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData PackBits(list<bool> const & vectBool)
{
BinaryData out( (vectBool.size()+7) / 8 );
for(uint32_t i=0; i<out.getSize(); i++)
out[i] = 0;
uint32_t i=0;
list<bool>::const_iterator iter;
for(iter = vectBool.begin();
iter != vectBool.end();
iter++, i++)
{
if(*iter)
out[i/8] |= (1<<(7-i%8));
}
return out;
}
/////////////////////////////////////////////////////////////////////////////
static list<bool> UnpackBits(BinaryData bits, uint32_t nBits)
{
list<bool> out;
for(uint32_t i=0; i<nBits; i++)
{
uint8_t bit = bits[i/8] & (1 << (7-i%8));
out.push_back(bit>0);
}
return out;
}
/////////////////////////////////////////////////////////////////////////////
static void getHash256(uint8_t const * strToHash,
uint32_t nBytes,
BinaryData & hashOutput)
{
CryptoPP::SHA256 sha256_;
if(hashOutput.getSize() != 32)
hashOutput.resize(32);
sha256_.CalculateDigest(hashOutput.getPtr(), strToHash, nBytes);
sha256_.CalculateDigest(hashOutput.getPtr(), hashOutput.getPtr(), 32);
}
/////////////////////////////////////////////////////////////////////////////
static void getHash256_NoSafetyCheck(
uint8_t const * strToHash,
uint32_t nBytes,
BinaryData & hashOutput)
{
CryptoPP::SHA256 sha256_;
sha256_.CalculateDigest(hashOutput.getPtr(), strToHash, nBytes);
sha256_.CalculateDigest(hashOutput.getPtr(), hashOutput.getPtr(), 32);
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData getHash256(uint8_t const * strToHash,
uint32_t nBytes)
{
CryptoPP::SHA256 sha256_;
BinaryData hashOutput(32);
sha256_.CalculateDigest(hashOutput.getPtr(), strToHash, nBytes);
sha256_.CalculateDigest(hashOutput.getPtr(), hashOutput.getPtr(), 32);
return hashOutput;
}
/////////////////////////////////////////////////////////////////////////////
static void getHash256(BinaryData const & strToHash,
BinaryData & hashOutput)
{
getHash256(strToHash.getPtr(), strToHash.getSize(), hashOutput);
}
/////////////////////////////////////////////////////////////////////////////
static void getHash256(BinaryDataRef strToHash,
BinaryData & hashOutput)
{
getHash256(strToHash.getPtr(), strToHash.getSize(), hashOutput);
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData getHash256(BinaryData const & strToHash)
{
BinaryData hashOutput(32);
getHash256(strToHash.getPtr(), strToHash.getSize(), hashOutput);
return hashOutput;
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData getHash256(BinaryDataRef strToHash)
{
BinaryData hashOutput(32);
getHash256(strToHash.getPtr(), strToHash.getSize(), hashOutput);
return hashOutput;
}
/////////////////////////////////////////////////////////////////////////////
static void getHash160(uint8_t const * strToHash,
uint32_t nBytes,
BinaryData & hashOutput)
{
CryptoPP::SHA256 sha256_;
CryptoPP::RIPEMD160 ripemd160_;
BinaryData bd32(32);
if(hashOutput.getSize() != 20)
hashOutput.resize(20);
sha256_.CalculateDigest(bd32.getPtr(), strToHash, nBytes);
ripemd160_.CalculateDigest(hashOutput.getPtr(), bd32.getPtr(), 32);
}
/////////////////////////////////////////////////////////////////////////////
static void getHash160_NoSafetyCheck(
uint8_t const * strToHash,
uint32_t nBytes,
BinaryData & hashOutput)
{
CryptoPP::SHA256 sha256_;
CryptoPP::RIPEMD160 ripemd160_;
BinaryData bd32(32);
sha256_.CalculateDigest(bd32.getPtr(), strToHash, nBytes);
ripemd160_.CalculateDigest(hashOutput.getPtr(), bd32.getPtr(), 32);
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData getHash160(uint8_t const * strToHash,
uint32_t nBytes)
{
BinaryData hashOutput(20);
getHash160(strToHash, nBytes, hashOutput);
return hashOutput;
}
/////////////////////////////////////////////////////////////////////////////
static void getHash160(BinaryDataRef strToHash,
BinaryData & hashOutput)
{
getHash160(strToHash.getPtr(), strToHash.getSize(), hashOutput);
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData getHash160(BinaryDataRef strToHash)
{
BinaryData hashOutput(20);
getHash160(strToHash.getPtr(), strToHash.getSize(), hashOutput);
return hashOutput;
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData getHash160(BinaryData const & strToHash)
{
BinaryData hashOutput(20);
getHash160(strToHash.getPtr(), strToHash.getSize(), hashOutput);
return hashOutput;
}
/////////////////////////////////////////////////////////////////////////////
// I need a non-static, non-overloaded method to be able to use this in SWIG
BinaryData getHash160_SWIG(BinaryData const & strToHash)
{
return getHash160(strToHash);
}
/////////////////////////////////////////////////////////////////////////////
// I need a non-static, non-overloaded method to be able to use this in SWIG
BinaryData ripemd160_SWIG(BinaryData const & strToHash)
{
CryptoPP::RIPEMD160 ripemd160_;
BinaryData bd20(20);
ripemd160_.CalculateDigest(bd20.getPtr(), strToHash.getPtr(), strToHash.getSize());
return bd20;
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData calculateMerkleRoot(vector<BinaryData> const & txhashlist)
{
vector<BinaryData> mtree = calculateMerkleTree(txhashlist);
return mtree[mtree.size()-1];
}
/////////////////////////////////////////////////////////////////////////////
static vector<BinaryData> calculateMerkleTree(vector<BinaryData> const & txhashlist)
{
// Don't know in advance how big this list will be, make a list too big
// and copy the result to the right size list afterwards
uint32_t numTx = txhashlist.size();
vector<BinaryData> merkleTree(3*numTx);
CryptoPP::SHA256 sha256_;
BinaryData hashInput(64);
BinaryData hashOutput(32);
for(uint32_t i=0; i<numTx; i++)
merkleTree[i] = txhashlist[i];
uint32_t thisLevelStart = 0;
uint32_t nextLevelStart = numTx;
uint32_t levelSize = numTx;
while(levelSize>1)
{
for(uint32_t j=0; j<(levelSize+1)/2; j++)
{
uint8_t* half1Ptr = hashInput.getPtr();
uint8_t* half2Ptr = hashInput.getPtr()+32;
if(j < levelSize/2)
{
merkleTree[thisLevelStart+(2*j) ].copyTo(half1Ptr, 32);
merkleTree[thisLevelStart+(2*j)+1].copyTo(half2Ptr, 32);
}
else
{
merkleTree[nextLevelStart-1].copyTo(half1Ptr, 32);
merkleTree[nextLevelStart-1].copyTo(half2Ptr, 32);
}
sha256_.CalculateDigest(hashOutput.getPtr(), hashInput.getPtr(), 64);
sha256_.CalculateDigest(hashOutput.getPtr(), hashOutput.getPtr(), 32);
merkleTree[nextLevelStart+j] = hashOutput;
}
levelSize = (levelSize+1)/2;
thisLevelStart = nextLevelStart;
nextLevelStart = nextLevelStart+levelSize;
}
// nextLevelStart is the size of the merkle tree
merkleTree.erase(merkleTree.begin()+nextLevelStart, merkleTree.end());
return merkleTree;
}
/////////////////////////////////////////////////////////////////////////////
// ALL THESE METHODS ASSUME THERE IS A FULL TX/TXIN/TXOUT BEHIND THE PTR
// The point of these methods is to calculate the length of the object,
// hence we don't know in advance how big the object actually will be, so
// we can't provide it as an input for safety checking...
static uint32_t TxInCalcLength(uint8_t const * ptr)
{
uint32_t viLen;
uint32_t scrLen = (uint32_t)readVarInt(ptr+36, &viLen);
return (36 + viLen + scrLen + 4);
}
static uint32_t TxInCalcLength(uint8_t const * ptr, uint32_t size)
{
if (size < 37)
throw BlockDeserializingException();
uint32_t viLen;
uint32_t scrLen = (uint32_t)readVarInt(ptr+36, size-36, &viLen);
return (36 + viLen + scrLen + 4);
}
/////////////////////////////////////////////////////////////////////////////
static uint32_t TxOutCalcLength(uint8_t const * ptr)
{
uint32_t viLen;
uint32_t scrLen = (uint32_t)readVarInt(ptr+8, &viLen);
return (8 + viLen + scrLen);
}
/////////////////////////////////////////////////////////////////////////////
static uint32_t TxOutCalcLength(uint8_t const * ptr, uint32_t size)
{
if (size < 9)
throw BlockDeserializingException();
uint32_t viLen;
uint32_t scrLen = (uint32_t)readVarInt(ptr+8, size-8, &viLen);
return (8 + viLen + scrLen);
}
/////////////////////////////////////////////////////////////////////////////
static uint32_t TxCalcLength(uint8_t const * ptr,
uint32_t size,
vector<uint32_t> * offsetsIn=NULL,
vector<uint32_t> * offsetsOut=NULL)
{
BinaryRefReader brr(ptr, size);
if (brr.getSizeRemaining() < 4)
throw BlockDeserializingException();
// Tx Version;
brr.advance(4);
// TxIn List
uint32_t nIn = (uint32_t)brr.get_var_int();
if(offsetsIn != NULL)
{
offsetsIn->resize(nIn+1);
for(uint32_t i=0; i<nIn; i++)
{
(*offsetsIn)[i] = brr.getPosition();
brr.advance( TxInCalcLength(brr.getCurrPtr(), brr.getSizeRemaining()) );
}
(*offsetsIn)[nIn] = brr.getPosition(); // Get the end of the last
}
else
{
// Don't need to track the offsets, just leap over everything
for(uint32_t i=0; i<nIn; i++)
brr.advance( TxInCalcLength(brr.getCurrPtr(), brr.getSizeRemaining()) );
}
// Now extract the TxOut list
uint32_t nOut = (uint32_t)brr.get_var_int();
if(offsetsOut != NULL)
{
offsetsOut->resize(nOut+1);
for(uint32_t i=0; i<nOut; i++)
{
(*offsetsOut)[i] = brr.getPosition();
brr.advance( TxOutCalcLength(brr.getCurrPtr(), brr.getSizeRemaining()) );
}
(*offsetsOut)[nOut] = brr.getPosition();
}
else
{
for(uint32_t i=0; i<nOut; i++)
brr.advance( TxOutCalcLength(brr.getCurrPtr(), brr.getSizeRemaining()) );
}
brr.advance(4);
return brr.getPosition();
}
/////////////////////////////////////////////////////////////////////////////
static uint32_t StoredTxCalcLength(
uint8_t const * ptr,
bool fragged,
vector<uint32_t> * offsetsIn=NULL,
vector<uint32_t> * offsetsOut=NULL)
{
BinaryRefReader brr(ptr);
// Tx Version;
brr.advance(4);
// TxIn List
uint32_t nIn = (uint32_t)brr.get_var_int();
if(offsetsIn != NULL)
{
offsetsIn->resize(nIn+1);
for(uint32_t i=0; i<nIn; i++)
{
(*offsetsIn)[i] = brr.getPosition();
brr.advance( TxInCalcLength(brr.getCurrPtr()) );
}
(*offsetsIn)[nIn] = brr.getPosition(); // Get the end of the last
}
else
{
// Don't need to track the offsets, just leap over everything
for(uint32_t i=0; i<nIn; i++)
brr.advance( TxInCalcLength(brr.getCurrPtr()) );
}
// Now extract the TxOut list
uint32_t nOut = (uint32_t)brr.get_var_int();
if(fragged)
{
offsetsOut->resize(nOut+1);
for(uint32_t i=0; i<nOut+1; i++)
(*offsetsOut)[i] = brr.getPosition();
}
else
{
// Now extract the TxOut list
if(offsetsOut != NULL)
{
offsetsOut->resize(nOut+1);
for(uint32_t i=0; i<nOut; i++)
{
(*offsetsOut)[i] = brr.getPosition();
brr.advance( TxOutCalcLength(brr.getCurrPtr()) );
}
(*offsetsOut)[nOut] = brr.getPosition();
}
else
{
for(uint32_t i=0; i<nOut; i++)
brr.advance( TxOutCalcLength(brr.getCurrPtr()) );
}
}
brr.advance(4);
return brr.getPosition();
}
/////////////////////////////////////////////////////////////////////////////
// TXOUT_SCRIPT_STDHASH160,
// TXOUT_SCRIPT_STDPUBKEY65,
// TXOUT_SCRIPT_STDPUBKEY33,
// TXOUT_SCRIPT_MULTISIG,
// TXOUT_SCRIPT_P2SH,
// TXOUT_SCRIPT_NONSTANDARD,
static TXOUT_SCRIPT_TYPE getTxOutScriptType(BinaryDataRef s)
{
uint32_t sz = s.getSize();
if(sz < 23)
return TXOUT_SCRIPT_NONSTANDARD;
else if( sz == 25 &&
s[0] == 0x76 &&
s[1] == 0xa9 &&
s[2] == 0x14 &&
s[-2] == 0x88 &&
s[-1] == 0xac )
return TXOUT_SCRIPT_STDHASH160;
else if( sz == 67 &&
s[0] == 0x41 &&
s[1] == 0x04 &&
s[-1] == 0xac)
return TXOUT_SCRIPT_STDPUBKEY65;
else if( sz == 35 &&
s[0] == 0x21 &&
(s[1] == 0x02 || s[1] == 0x03) &&
s[-1] == 0xac)
return TXOUT_SCRIPT_STDPUBKEY33;
else if( sz == 23 &&
s[0] == 0xa9 &&
s[1] == 0x14 &&
s[-1] == 0x87)
return TXOUT_SCRIPT_P2SH;
else if( s[-1] == 0xae && isMultisigScript(s))
return TXOUT_SCRIPT_MULTISIG;
else
return TXOUT_SCRIPT_NONSTANDARD;
}
/////////////////////////////////////////////////////////////////////////////
// TXIN_SCRIPT_STDUNCOMPR
// TXIN_SCRIPT_STDCOMPR
// TXIN_SCRIPT_COINBASE
// TXIN_SCRIPT_SPENDPUBKEY
// TXIN_SCRIPT_SPENDMULTI
// TXIN_SCRIPT_SPENDP2SH
// TXIN_SCRIPT_NONSTANDARD
static TXIN_SCRIPT_TYPE getTxInScriptType(BinaryDataRef script,
BinaryDataRef prevTxHash)
{
if(script.getSize() == 0)
return TXIN_SCRIPT_NONSTANDARD;
if(prevTxHash == BtcUtils::EmptyHash_)
return TXIN_SCRIPT_COINBASE;
// Technically, this doesn't recognize all P2SH spends. Only
// spends of P2SH scripts that are, themselves, standard
BinaryData lastPush = getLastPushDataInScript(script);
if(getTxOutScriptType(lastPush) != TXOUT_SCRIPT_NONSTANDARD)
return TXIN_SCRIPT_SPENDP2SH;
if(script[0]==0x00)
{
// TODO: All this complexity to check TxIn type may be too slow when
// scanning the blockchain...will need to investigate later
vector<BinaryDataRef> splitScr = splitPushOnlyScriptRefs(script);
if(splitScr.size() == 0)
return TXIN_SCRIPT_NONSTANDARD;
// TODO: Maybe should identify whether the other pushed data
// in the script is a potential solution for the
// subscript... meh?
//BinaryDataRef lastObj = splitScr[splitScr.size() - 1];
if(script[2]==0x30 && script[4]==0x02)
return TXIN_SCRIPT_SPENDMULTI;
}
if( !(script[1]==0x30 && script[3]==0x02) )
return TXIN_SCRIPT_NONSTANDARD;
uint32_t sigSize = script[2] + 4;
if(script.getSize() == sigSize)
return TXIN_SCRIPT_SPENDPUBKEY;
uint32_t keySizeFull = 66; // \x41 \x04 [X32] [Y32]
uint32_t keySizeCompr= 34; // \x41 \x02 [X32]
if(script.getSize() == sigSize + keySizeFull)
return TXIN_SCRIPT_STDUNCOMPR;
else if(script.getSize() == sigSize + keySizeCompr)
return TXIN_SCRIPT_STDCOMPR;
return TXIN_SCRIPT_NONSTANDARD;
}
/////////////////////////////////////////////////////////////////////////////
static BinaryData getTxOutRecipientAddr(BinaryDataRef const & script,
TXOUT_SCRIPT_TYPE type=TXOUT_SCRIPT_NONSTANDARD)
{
if(type==TXOUT_SCRIPT_NONSTANDARD)
type = getTxOutScriptType(script);
switch(type)
{
case(TXOUT_SCRIPT_STDHASH160): return script.getSliceCopy(3,20);
case(TXOUT_SCRIPT_STDPUBKEY65): return getHash160(script.getSliceRef(1,65));
case(TXOUT_SCRIPT_STDPUBKEY33): return getHash160(script.getSliceRef(1,33));
case(TXOUT_SCRIPT_P2SH): return script.getSliceCopy(2,20);
case(TXOUT_SCRIPT_MULTISIG): return BadAddress_;
case(TXOUT_SCRIPT_NONSTANDARD): return BadAddress_;
default: return BadAddress_;
}
}
/////////////////////////////////////////////////////////////////////////////
// We use this for LevelDB keys, to return same key if the same priv/pub
// pair is used, and also saving a few bytes for common script types
static BinaryData getTxOutScrAddr(BinaryDataRef script,
TXOUT_SCRIPT_TYPE type=TXOUT_SCRIPT_NONSTANDARD)
{
BinaryWriter bw;
if(type==TXOUT_SCRIPT_NONSTANDARD)
type = getTxOutScriptType(script);
switch(type)
{
case(TXOUT_SCRIPT_STDHASH160):
bw.put_uint8_t(SCRIPT_PREFIX_HASH160);
bw.put_BinaryData(script.getSliceCopy(3,20));
return bw.getData();
case(TXOUT_SCRIPT_STDPUBKEY65):
bw.put_uint8_t(SCRIPT_PREFIX_HASH160);
bw.put_BinaryData( getHash160(script.getSliceRef(1,65)));
return bw.getData();
case(TXOUT_SCRIPT_STDPUBKEY33):
bw.put_uint8_t(SCRIPT_PREFIX_HASH160);
bw.put_BinaryData( getHash160(script.getSliceRef(1,33)));
return bw.getData();
case(TXOUT_SCRIPT_P2SH):
bw.put_uint8_t(SCRIPT_PREFIX_P2SH);
bw.put_BinaryData(script.getSliceCopy(2,20));
return bw.getData();
case(TXOUT_SCRIPT_NONSTANDARD):
bw.put_uint8_t(SCRIPT_PREFIX_NONSTD);
bw.put_BinaryData(getHash160(script));
return bw.getData();