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BlockChain.cpp
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#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <time.h>
#include <stdarg.h>
#include <string>
#include <vector>
#include <unordered_set>
#include "BlockChain.h" // The header for this system
#include "Base58.h" // A helper interface to
#include "BitcoinAddress.h"
#include "RIPEMD160.h"
#include "SHA256.h"
#include "logging.h"
//
// Written by John W. Ratcliff : mailto: [email protected]
//
// Website: http://codesuppository.blogspot.com/
//
// Source contained in this project includes portions of source code from other open source projects; though that source may have
// been modified to be included here. Original notices are left in where appropriate.
//
// Some of the hash and bignumber implementations are based on source code find in the 'cbitcoin' project; though it has been modified here to remove all memory allocations.
//
// http://cbitcoin.com/
//
// If you find this code snippet useful; you can tip me at this bitcoin address:
//
// BITCOIN TIP JAR: "1NY8SuaXfh8h5WHd4QnYwpgL1mNu9hHVBT"
//
#ifdef _MSC_VER // Disable the stupid ass absurd warning messages from Visual Studio telling you that using stdlib and stdio is 'not valid ANSI C'
#pragma warning(disable:4996)
#pragma warning(disable:4718)
#pragma warning(disable:4458 4456)
#endif
// These defines set the limits this parser expects to ever encounter on the blockchain data stream.
// In a debug build there are asserts to make sure these limits are never exceeded.
// These limits work for the blockchain current as of July 1, 2013.
// The limits can be revised when and if necessary.
#define MAX_BLOCK_SIZE (1024*1024)*32 // never expect to have a block larger than 32mb
#define MAX_BLOCK_TRANSACTION 32768 // never expect more than 32768 transactions per block.
#define MAX_BLOCK_INPUTS 32768 // never expect more than 32768 total inputs
#define MAX_BLOCK_OUTPUTS 32768 // never expect more than 32768 total outputs
#define MAX_REASONABLE_SCRIPT_LENGTH (1024*32) // would never expect any script to be more than 16k in size; that would be very unusual!
#define MAX_REASONABLE_INPUTS 32678 // really can't imagine any transaction ever having more than 32768 inputs
#define MAX_REASONABLE_OUTPUTS 32768 // really can't imagine any transaction ever having more than 32768 outputs
namespace BLOCK_CHAIN
{
enum ScriptOpcodes
{
OP_0 = 0x00,
OP_PUSHDATA1 = 0x4c,
OP_PUSHDATA2 = 0x4d,
OP_PUSHDATA4 = 0x4e,
OP_1NEGATE = 0x4f,
OP_RESERVED = 0x50,
OP_1 = 0x51,
OP_2 = 0x52,
OP_3 = 0x53,
OP_4 = 0x54,
OP_5 = 0x55,
OP_6 = 0x56,
OP_7 = 0x57,
OP_8 = 0x58,
OP_9 = 0x59,
OP_10 = 0x5a,
OP_11 = 0x5b,
OP_12 = 0x5c,
OP_13 = 0x5d,
OP_14 = 0x5e,
OP_15 = 0x5f,
OP_16 = 0x60,
OP_NOP = 0x61,
OP_VER = 0x62,
OP_IF = 0x63,
OP_NOTIF = 0x64,
OP_VERIF = 0x65,
OP_VERNOTIF = 0x66,
OP_ELSE = 0x67,
OP_ENDIF = 0x68,
OP_VERIFY = 0x69,
OP_RETURN = 0x6a,
OP_TOALTSTACK = 0x6b,
OP_FROMALTSTACK = 0x6c,
OP_2DROP = 0x6d,
OP_2DUP = 0x6e,
OP_3DUP = 0x6f,
OP_2OVER = 0x70,
OP_2ROT = 0x71,
OP_2SWAP = 0x72,
OP_IFDUP = 0x73,
OP_DEPTH = 0x74,
OP_DROP = 0x75,
OP_DUP = 0x76,
OP_NIP = 0x77,
OP_OVER = 0x78,
OP_PICK = 0x79,
OP_ROLL = 0x7a,
OP_ROT = 0x7b,
OP_SWAP = 0x7c,
OP_TUCK = 0x7d,
OP_CAT = 0x7e, // Currently disabled
OP_SUBSTR = 0x7f, // Currently disabled
OP_LEFT = 0x80, // Currently disabled
OP_RIGHT = 0x81, // Currently disabled
OP_SIZE = 0x82, // Currently disabled
OP_INVERT = 0x83, // Currently disabled
OP_AND = 0x84, // Currently disabled
OP_OR = 0x85, // Currently disabled
OP_XOR = 0x86, // Currently disabled
OP_EQUAL = 0x87,
OP_EQUALVERIFY = 0x88,
OP_RESERVED1 = 0x89,
OP_RESERVED2 = 0x8a,
OP_1ADD = 0x8b,
OP_1SUB = 0x8c,
OP_2MUL = 0x8d, // Currently disabled
OP_2DIV = 0x8e, // Currently disabled
OP_NEGATE = 0x8f,
OP_ABS = 0x90,
OP_NOT = 0x91,
OP_0NOTEQUAL = 0x92,
OP_ADD = 0x93,
OP_SUB = 0x94,
OP_MUL = 0x95, // Currently disabled
OP_DIV = 0x96, // Currently disabled
OP_MOD = 0x97, // Currently disabled
OP_LSHIFT = 0x98, // Currently disabled
OP_RSHIFT = 0x99, // Currently disabled
OP_BOOLAND = 0x9a,
OP_BOOLOR = 0x9b,
OP_NUMEQUAL = 0x9c,
OP_NUMEQUALVERIFY = 0x9d,
OP_NUMNOTEQUAL = 0x9e,
OP_LESSTHAN = 0x9f,
OP_GREATERTHAN = 0xa0,
OP_LESSTHANOREQUAL = 0xa1,
OP_GREATERTHANOREQUAL = 0xa2,
OP_MIN = 0xa3,
OP_MAX = 0xa4,
OP_WITHIN = 0xa5,
OP_RIPEMD160 = 0xa6,
OP_SHA1 = 0xa7,
OP_SHA256 = 0xa8,
OP_HASH160 = 0xa9,
OP_HASH256 = 0xaa,
OP_CODESEPARATOR = 0xab,
OP_CHECKSIG = 0xac,
OP_CHECKSIGVERIFY = 0xad,
OP_CHECKMULTISIG = 0xae,
OP_CHECKMULTISIGVERIFY = 0xaf,
OP_NOP1 = 0xb0,
OP_NOP2 = 0xb1,
OP_NOP3 = 0xb2,
OP_NOP4 = 0xb3,
OP_NOP5 = 0xb4,
OP_NOP6 = 0xb5,
OP_NOP7 = 0xb6,
OP_NOP8 = 0xb7,
OP_NOP9 = 0xb8,
OP_NOP10 = 0xb9,
OP_SMALLINTEGER = 0xfa,
OP_PUBKEYS = 0xfb,
OP_PUBKEYHASH = 0xfd,
OP_PUBKEY = 0xfe,
OP_INVALIDOPCODE = 0xff
};
// Some globals for error reporting.
static uint32_t gBlockTime = 0;
static uint32_t gBlockIndex = 0;
static uint32_t gTransactionIndex = 0;
static uint32_t gOutputIndex = 0;
static bool gIsWarning = false;
static bool gReportTransactionHash = false;
static const char *gDummyKeyAscii = "1BadkEyPaj5oW2Uw4nY5BkYbPRYyTyqs9A";
static uint8_t gDummyKey[25];
static const char *gZeroByteAscii = "1zeroBTYRExUcufrTkwg27LsAvrhehtCJ";
static uint8_t gZeroByte[25];
static bool inline isASCII(char c)
{
bool ret = false;
if ((c >= 32 && c < 127) || c == 13)
{
ret = true;
}
return ret;
}
// A 256 bit hash
class Hash256
{
public:
Hash256(void)
{
mWord0 = 0;
mWord1 = 0;
mWord2 = 0;
mWord3 = 0;
}
Hash256(const Hash256 &h)
{
mWord0 = h.mWord0;
mWord1 = h.mWord1;
mWord2 = h.mWord2;
mWord3 = h.mWord3;
}
inline Hash256(const uint8_t *src)
{
mWord0 = *(const uint64_t *)(src);
mWord1 = *(const uint64_t *)(src + 8);
mWord2 = *(const uint64_t *)(src + 16);
mWord3 = *(const uint64_t *)(src + 24);
}
inline uint32_t getHash(void) const
{
const uint32_t *h = (const uint32_t *)&mWord0;
return h[0] ^ h[1] ^ h[2] ^ h[3] ^ h[4] ^ h[5] ^ h[6] ^ h[7];
}
inline bool operator==(const Hash256 &h) const
{
return mWord0 == h.mWord0 && mWord1 == h.mWord1 && mWord2 == h.mWord2 && mWord3 == h.mWord3;
}
uint64_t mWord0;
uint64_t mWord1;
uint64_t mWord2;
uint64_t mWord3;
};
class BlockHeader : public Hash256
{
public:
BlockHeader(void)
{
mFileIndex = 0;
mFileOffset = 0;
mBlockLength = 0;
}
BlockHeader(const Hash256 &h) : Hash256(h)
{
mFileIndex = 0;
mFileOffset = 0;
mBlockLength = 0;
}
// Here the == operator is used to see if the hash values match
bool operator==(const BlockHeader &other) const
{
const Hash256 &a = *this;
const Hash256 &b = other;
return a == b;
}
uint32_t mFileIndex;
uint32_t mFileOffset;
uint32_t mBlockLength;
uint8_t mPreviousBlockHash[32];
};
class FileLocation : public Hash256
{
public:
FileLocation(void)
{
}
FileLocation(const Hash256 &h, uint32_t fileIndex, uint32_t fileOffset, uint32_t fileLength, uint32_t transactionIndex) : Hash256(h)
{
mFileIndex = fileIndex;
mFileOffset = fileOffset;
mFileLength = fileLength;
mTransactionIndex = transactionIndex;
}
// Here the == operator is used to see if the hash values match
bool operator==(const BlockHeader &other) const
{
const Hash256 &a = *this;
const Hash256 &b = other;
return a == b;
}
uint32_t mFileIndex;
uint32_t mFileOffset;
uint32_t mFileLength;
uint32_t mTransactionIndex;
};
struct BlockPrefix
{
uint32_t mVersion; // The block version number.
uint8_t mPreviousBlock[32]; // The 32 byte (256 bit) hash of the previous block in the blockchain
uint8_t mMerkleRoot[32]; // The 32 bye merkle root hash
uint32_t mTimeStamp; // The block time stamp
uint32_t mBits; // The block bits field.
uint32_t mNonce; // The block random number 'nonce' field.
};
#define MAGIC_ID 0xD9B4BEF9
#define ONE_BTC 100000000
#define ONE_MBTC (ONE_BTC/1000)
} // end of BLOCK_CHAIN namespace
// A template to compute the hash value for a BlockHeader
namespace std
{
template <>
struct hash<BLOCK_CHAIN::BlockHeader>
{
std::size_t operator()(const BLOCK_CHAIN::BlockHeader &k) const
{
return std::size_t(k.getHash());
}
};
template <>
struct hash<BLOCK_CHAIN::FileLocation>
{
std::size_t operator()(const BLOCK_CHAIN::FileLocation &k) const
{
return std::size_t(k.getHash());
}
};
}
namespace BLOCK_CHAIN
{
class BlockImpl : public BlockChain::Block
{
public:
// Read one byte from the block-chain input stream.
inline uint8_t readU8(void)
{
assert((mBlockRead + sizeof(uint8_t)) <= mBlockEnd);
uint8_t ret = *(uint8_t *)mBlockRead;
mBlockRead += sizeof(uint8_t);
return ret;
}
// Read two bytes from the block-chain input stream.
inline uint16_t readU16(void)
{
assert((mBlockRead + sizeof(uint16_t)) <= mBlockEnd);
uint16_t ret = *(uint16_t *)mBlockRead;
mBlockRead += sizeof(uint16_t);
return ret;
}
// Read four bytes from the block-chain input stream.
inline uint32_t readU32(void)
{
assert((mBlockRead + sizeof(uint32_t)) <= mBlockEnd);
uint32_t ret = *(uint32_t *)mBlockRead;
mBlockRead += sizeof(uint32_t);
return ret;
}
// Read eight bytes from the block-chain input stream.
inline uint64_t readU64(void)
{
assert((mBlockRead + sizeof(uint64_t)) <= mBlockEnd);
uint64_t ret = *(uint64_t *)mBlockRead;
mBlockRead += sizeof(uint64_t);
return ret;
}
// Return the current stream pointer representing a 32byte hash and advance the read pointer accordingly
inline const uint8_t *readHash(void)
{
const uint8_t *ret = mBlockRead;
assert((mBlockRead + 32) <= mBlockEnd);
mBlockRead += 32;
return ret;
}
// reads a variable length integer.
// See the documentation from here: https://en.bitcoin.it/wiki/Protocol_specification#Variable_length_integer
inline uint32_t readVariableLengthInteger(void)
{
uint32_t ret = 0;
uint8_t v = readU8();
if (v < 0xFD) // If it's less than 0xFD use this value as the unsigned integer
{
ret = (uint32_t)v;
}
else
{
uint16_t v = readU16();
if (v < 0xFFFF)
{
ret = (uint32_t)v;
}
else
{
uint32_t v = readU32();
if (v < 0xFFFFFFFF)
{
ret = (uint32_t)v;
}
else
{
assert(0); // never expect to actually encounter a 64bit integer in the block-chain stream; it's outside of any reasonable expected value
uint64_t v = readU64();
ret = (uint32_t)v;
}
}
}
return ret;
}
// Get the current read buffer address and advance the stream buffer by this length; used to get the address of input/output scripts
inline const uint8_t * getReadBufferAdvance(uint32_t readLength)
{
const uint8_t *ret = mBlockRead;
mBlockRead += readLength;
assert(mBlockRead <= mBlockEnd);
return ret;
}
// Read a transaction input
bool readInput(BlockChain::BlockInput &input)
{
bool ret = true;
input.transactionHash = readHash(); // read the transaction hash
input.transactionIndex = readU32(); // read the transaction index
input.responseScriptLength = readVariableLengthInteger(); // read the length of the script
assert(input.responseScriptLength < MAX_REASONABLE_SCRIPT_LENGTH);
if (input.responseScriptLength >= 8192)
{
logMessage("Block: %d : Unreasonably large input script length of %d bytes.\r\n", gBlockIndex, input.responseScriptLength);
}
if (input.responseScriptLength < MAX_REASONABLE_SCRIPT_LENGTH)
{
input.responseScript = input.responseScriptLength ? getReadBufferAdvance(input.responseScriptLength) : NULL; // get the script buffer pointer; and advance the read location
input.sequenceNumber = readU32();
}
else
{
logMessage("Block %d : Outrageous sized input script of %d bytes! Shutting down.\r\n", gBlockIndex, input.responseScriptLength);
exit(1);
}
return ret;
}
void getAsciiAddress(BlockChain::BlockOutput &o)
{
o.asciiAddress[0] = 0;
char temp[256];
switch (o.keyType)
{
case BlockChain::KT_MULTISIG:
sprintf(o.asciiAddress, "MultiSig[%d]", o.signatureCount);
break;
case BlockChain::KT_STEALTH:
strcat(o.asciiAddress, "*STEALTH*");
break;
case BlockChain::KT_SCRIPT_HASH:
strcat(o.asciiAddress, "*SCRIPT_HASH*");
break;
default:
break;
}
for (uint32_t i = 0; i < MAX_MULTISIG; i++)
{
if (o.publicKey[i])
{
if (i)
{
strcat(o.asciiAddress, ":");
}
bitcoinAddressToAscii(o.addresses[i].address, temp, 256);
strcat(o.asciiAddress, temp);
}
else
{
break;
}
}
// If this is a multi-sig address, *then* we need to generate a multisig address for it.
if (o.keyType == BlockChain::KT_MULTISIG)
{
uint8_t hash[20];
computeRIPEMD160(&o.addresses, 25 * MAX_MULTISIG, hash);
bitcoinRIPEMD160ToAddress(hash, o.multisig.address);
}
}
const char * getKeyType(BlockChain::KeyType k)
{
const char *ret = "UNKNOWN";
switch (k)
{
case BlockChain::KT_RIPEMD160:
ret = "RIPEMD160";
break;
case BlockChain::KT_UNCOMPRESSED_PUBLIC_KEY:
ret = "UNCOMPRESSED_PUBLIC_KEY";
break;
case BlockChain::KT_COMPRESSED_PUBLIC_KEY:
ret = "COMPRESSED_PUBLIC_KEY";
break;
case BlockChain::KT_TRUNCATED_COMPRESSED_KEY:
ret = "TRUNCATED_COMPRESSED_KEY";
break;
case BlockChain::KT_MULTISIG:
ret = "MULTISIG";
break;
case BlockChain::KT_STEALTH:
ret = "STEALTH";
break;
case BlockChain::KT_ZERO_LENGTH:
ret = "ZERO_LENGTH";
break;
case BlockChain::KT_SCRIPT_HASH:
ret = "SCRIPT_HASH";
break;
default:
break;
}
return ret;
}
// Read an output block
bool readOutput(BlockChain::BlockOutput &output)
{
bool ret = true;
new (&output) BlockChain::BlockOutput;
output.value = readU64(); // Read the value of the transaction
blockReward += output.value;
output.challengeScriptLength = readVariableLengthInteger();
assert(output.challengeScriptLength < MAX_REASONABLE_SCRIPT_LENGTH);
if (output.challengeScriptLength >= 8192)
{
logMessage("Block %d : Unreasonably large output script length of %d bytes.\r\n", gBlockIndex, output.challengeScriptLength);
}
else if (output.challengeScriptLength > MAX_REASONABLE_SCRIPT_LENGTH)
{
logMessage("Block %d : output script too long %d bytes!\r\n", gBlockIndex, output.challengeScriptLength);
exit(1);
}
output.challengeScript = output.challengeScriptLength ? getReadBufferAdvance(output.challengeScriptLength) : NULL; // get the script buffer pointer and advance the read location
if (output.challengeScript)
{
uint8_t lastInstruction = output.challengeScript[output.challengeScriptLength - 1];
if (output.challengeScriptLength == 67 && output.challengeScript[0] == 65 && output.challengeScript[66] == OP_CHECKSIG)
{
output.publicKey[0] = output.challengeScript + 1;
output.keyType = BlockChain::KT_UNCOMPRESSED_PUBLIC_KEY;
}
if (output.challengeScriptLength == 40 && output.challengeScript[0] == OP_RETURN)
{
output.publicKey[0] = &output.challengeScript[1];
output.keyType = BlockChain::KT_STEALTH;
}
else if (output.challengeScriptLength == 66 && output.challengeScript[65] == OP_CHECKSIG)
{
output.publicKey[0] = output.challengeScript;
output.keyType = BlockChain::KT_UNCOMPRESSED_PUBLIC_KEY;
}
else if (output.challengeScriptLength == 35 && output.challengeScript[34] == OP_CHECKSIG)
{
output.publicKey[0] = &output.challengeScript[1];
output.keyType = BlockChain::KT_COMPRESSED_PUBLIC_KEY;
}
else if (output.challengeScriptLength == 33 && output.challengeScript[0] == 0x20)
{
output.publicKey[0] = &output.challengeScript[1];
output.keyType = BlockChain::KT_TRUNCATED_COMPRESSED_KEY;
}
else if (output.challengeScriptLength == 23 &&
output.challengeScript[0] == OP_HASH160 &&
output.challengeScript[1] == 20 &&
output.challengeScript[22] == OP_EQUAL)
{
output.publicKey[0] = output.challengeScript + 2;
output.keyType = BlockChain::KT_SCRIPT_HASH;
}
else if (output.challengeScriptLength >= 25 &&
output.challengeScript[0] == OP_DUP &&
output.challengeScript[1] == OP_HASH160 &&
output.challengeScript[2] == 20)
{
output.publicKey[0] = output.challengeScript + 3;
output.keyType = BlockChain::KT_RIPEMD160;
}
else if (output.challengeScriptLength == 5 &&
output.challengeScript[0] == OP_DUP &&
output.challengeScript[1] == OP_HASH160 &&
output.challengeScript[2] == OP_0 &&
output.challengeScript[3] == OP_EQUALVERIFY &&
output.challengeScript[4] == OP_CHECKSIG)
{
logMessage("WARNING: Unusual but expected output script. Block %s : Transaction: %s : OutputIndex: %s\r\n", formatNumber(gBlockIndex), formatNumber(gTransactionIndex), formatNumber(gOutputIndex));
gIsWarning = true;
}
else if (lastInstruction == OP_CHECKMULTISIG && output.challengeScriptLength > 25) // looks to be a multi-sig
{
const uint8_t *scanBegin = output.challengeScript;
const uint8_t *scanEnd = &output.challengeScript[output.challengeScriptLength - 2];
bool expectedPrefix = false;
bool expectedPostfix = false;
switch (*scanBegin)
{
case OP_0:
case OP_1:
case OP_2:
case OP_3:
case OP_4:
case OP_5:
expectedPrefix = true;
break;
default:
// assert(0); // unexpected
break;
}
switch (*scanEnd)
{
case OP_1:
case OP_2:
case OP_3:
case OP_4:
case OP_5:
expectedPostfix = true;
break;
default:
// assert(0); // unexpected
break;
}
if (expectedPrefix && expectedPostfix)
{
scanBegin++;
uint32_t keyIndex = 0;
while (keyIndex < 5 && scanBegin < scanEnd)
{
if (*scanBegin == 0x21)
{
output.keyType = BlockChain::KT_MULTISIG;
scanBegin++;
output.publicKey[keyIndex] = scanBegin;
scanBegin += 0x21;
uint32_t bitMask = 1 << keyIndex;
output.multiSigFormat |= bitMask; // turn this bit on if it is in compressed format
keyIndex++;
}
else if (*scanBegin == 0x41)
{
output.keyType = BlockChain::KT_MULTISIG;
scanBegin++;
output.publicKey[keyIndex] = scanBegin;
scanBegin += 0x41;
keyIndex++;
}
else
{
break; //
}
}
}
if (output.publicKey[0] == NULL)
{
logMessage("****MULTI_SIG WARNING: Unable to decipher multi-sig output. Block %s : Transaction: %s : OutputIndex: %s\r\n", formatNumber(gBlockIndex), formatNumber(gTransactionIndex), formatNumber(gOutputIndex));
gIsWarning = true;
}
}
else
{
// Ok..we are going to scan for this pattern.. OP_DUP, OP_HASH160, 0x14 then exactly 20 bytes after 0x88,0xAC
// 25...
if (output.challengeScriptLength > 25)
{
uint32_t endIndex = output.challengeScriptLength - 25;
for (uint32_t i = 0; i < endIndex; i++)
{
const uint8_t *scan = &output.challengeScript[i];
if (scan[0] == OP_DUP &&
scan[1] == OP_HASH160 &&
scan[2] == 20 &&
scan[23] == OP_EQUALVERIFY &&
scan[24] == OP_CHECKSIG)
{
output.publicKey[0] = &scan[3];
output.keyType = BlockChain::KT_RIPEMD160;
logMessage("WARNING: Unusual output script. Block %s : Transaction: %s : OutputIndex: %s\r\n", formatNumber(gBlockIndex), formatNumber(gTransactionIndex), formatNumber(gOutputIndex));
gIsWarning = true;
break;
}
}
}
}
if (output.publicKey[0] == NULL)
{
logMessage("==========================================\r\n");
logMessage("FAILED TO LOCATE PUBLIC KEY\r\n");
logMessage("ChallengeScriptLength: %d bytes long\r\n", output.challengeScriptLength);
for (uint32_t i = 0; i < output.challengeScriptLength; i++)
{
logMessage("%02x ", output.challengeScript[i]);
if (((i + 16) & 15) == 0)
{
logMessage("\r\n");
}
}
logMessage("\r\n");
logMessage("==========================================\r\n");
logMessage("\r\n");
}
}
else
{
logMessage("Block %d : has a zero byte length output script?\r\n", gBlockIndex);
gReportTransactionHash = true;
}
if (!output.publicKey[0])
{
if (output.challengeScriptLength == 0)
{
output.publicKey[0] = &gZeroByte[1];
}
else
{
output.publicKey[0] = &gDummyKey[1];
}
output.keyType = BlockChain::KT_RIPEMD160;
logMessage("WARNING: Failed to decode public key in output script. Block %s : Transaction: %s : OutputIndex: %s scriptLength: %s\r\n", formatNumber(gBlockIndex), formatNumber(gTransactionIndex), formatNumber(gOutputIndex), formatNumber(output.challengeScriptLength));
gReportTransactionHash = true;
gIsWarning = true;
}
switch (output.keyType)
{
case BlockChain::KT_RIPEMD160:
bitcoinRIPEMD160ToAddress(output.publicKey[0], output.addresses[0].address);
break;
case BlockChain::KT_SCRIPT_HASH:
bitcoinRIPEMD160ToScriptAddress(output.publicKey[0], output.addresses[0].address);
break;
case BlockChain::KT_STEALTH:
bitcoinRIPEMD160ToAddress(output.publicKey[0], output.addresses[0].address);
break;
case BlockChain::KT_UNCOMPRESSED_PUBLIC_KEY:
{
bitcoinPublicKeyToAddress(output.publicKey[0], output.addresses[0].address);
}
break;
case BlockChain::KT_COMPRESSED_PUBLIC_KEY:
{
bitcoinCompressedPublicKeyToAddress(output.publicKey[0], output.addresses[0].address);
}
break;
case BlockChain::KT_TRUNCATED_COMPRESSED_KEY:
{
uint8_t key[33];
key[0] = 0x2;
memcpy(&key, output.publicKey[0], 32);
bitcoinCompressedPublicKeyToAddress(key, output.addresses[0].address);
}
break;
case BlockChain::KT_MULTISIG:
{
for (uint32_t i = 0; i < MAX_MULTISIG; i++)
{
const uint8_t *key = output.publicKey[i];
if (key == NULL)
break;
uint32_t mask = 1 << i;
if (output.multiSigFormat & mask)
{
bitcoinCompressedPublicKeyToAddress(output.publicKey[i], output.addresses[i].address);
}
else
{
bitcoinPublicKeyToAddress(output.publicKey[i], output.addresses[i].address);
}
}
}
break;
default:
break;
}
output.keyTypeName = getKeyType(output.keyType);
getAsciiAddress(output);
// if ( output.keyType == BlockChain::KT_SCRIPT_HASH )
// {
// logMessage("ScriptHash: %s\r\n", output.asciiAddress );
// }
if (gReportTransactionHash)
{
gIsWarning = true;
}
return ret;
}
// Read a single transaction
bool readTransaction(BlockChain::BlockTransaction &transaction,
uint32_t &transactionIndex,
uint32_t tindex)
{
bool ret = false;
const uint8_t *transactionBegin = mBlockRead;
transaction.transactionVersionNumber = readU32(); // read the transaction version number; always expect it to be 1
if (transaction.transactionVersionNumber == 1 || transaction.transactionVersionNumber == 2)
{
}
else
{
gIsWarning = true;
logMessage("Encountered unusual and unexpected transaction version number of [%d] for transaction #%d\r\n", transaction.transactionVersionNumber, tindex);
}
transaction.inputCount = readVariableLengthInteger();
assert(transaction.inputCount < MAX_REASONABLE_INPUTS);
if (transaction.inputCount >= MAX_REASONABLE_INPUTS)
{
logMessage("Invalid number of inputs found! %d\r\n", transaction.inputCount);
exit(1);
}
transaction.inputs = &mInputs[totalInputCount];
totalInputCount += transaction.inputCount;
assert(totalInputCount < MAX_BLOCK_INPUTS);
if (totalInputCount >= MAX_BLOCK_INPUTS)
{
logMessage("Invalid number of block inputs: %d\r\n", totalInputCount);
exit(1);
}
if (totalInputCount < MAX_BLOCK_INPUTS)
{
for (uint32_t i = 0; i < transaction.inputCount; i++)
{
BlockChain::BlockInput &input = transaction.inputs[i];
ret = readInput(input); // read the input
if (!ret)
{
logMessage("Failed to read input!\r\n");
exit(1);
// break;
}
}
}
if (ret)
{
transaction.outputCount = readVariableLengthInteger();
assert(transaction.outputCount < MAX_REASONABLE_OUTPUTS);
if (transaction.outputCount > MAX_REASONABLE_OUTPUTS)
{
logMessage("Exceeded maximum reasonable outputs.\r\n");
exit(1);
}
transaction.outputs = &mOutputs[totalOutputCount];
totalOutputCount += transaction.outputCount;
assert(totalOutputCount < MAX_BLOCK_OUTPUTS);
if (totalOutputCount >= MAX_BLOCK_OUTPUTS)
{
logMessage("Invalid number of block outputs. %d\r\n", totalOutputCount);
exit(1);
}
if (totalOutputCount < MAX_BLOCK_OUTPUTS)
{
for (uint32_t i = 0; i < transaction.outputCount; i++)
{
gOutputIndex = i;
BlockChain::BlockOutput &output = transaction.outputs[i];
ret = readOutput(output);
if (!ret)
{
logMessage("Failed to read output.\r\n");
exit(1);
// break;
}
}
transaction.lockTime = readU32();
{
transaction.transactionLength = (uint32_t)(mBlockRead - transactionBegin);
transaction.fileIndex = fileIndex;
transaction.fileOffset = fileOffset + (uint32_t)(transactionBegin - mBlockData);
transaction.transactionIndex = transactionIndex;
transactionIndex++;
computeSHA256(transactionBegin, transaction.transactionLength, transaction.transactionHash);
computeSHA256(transaction.transactionHash, 32, transaction.transactionHash);
if (gReportTransactionHash)
{
logMessage("TRANSACTION HASH:");
printReverseHash(transaction.transactionHash);
logMessage("\r\n");
gReportTransactionHash = false;
}
}
}
}
return ret;
}
// @see this link for detailed documentation:
//
// http://james.lab6.com/2012/01/12/bitcoin-285-bytes-that-changed-the-world/
//
// read a single block from the block chain into memory
// Here is how a block is read.
//
// Step #1 : We read the block format version
// Step #2 : We read the hash of the previous block
// Step #3 : We read the merkle root hash
// Step #4 : We read the block time stamp
// Step #5 : We read a 'bits' field; internal use defined by the bitcoin software
// Step #6 : We read the 'nonce' value; a randum number generated during the mining process.
// Step #7 : We read the transaction count
// Step #8 : For/Each Transaction
// : (a) We read the transaction version number.
// : (b) We read the number of inputs.
//Step #8a : For/Each input
// : (a) Read the hash of the input transaction
// : (b) Read the input transaction index
// : (c) Read the response script length
// : (d) Read the response script data; parsed using the bitcoin scripting system; a little virtual machine.
// : Read the sequence number.
// : Read the number of outputs
//Step #8b : For/Each Output
// : (a) Read the value of the output in BTC fixed decimal; see docs.
// : (b) Read the length of the challenge script.
// : (c) Read the challenge script
//Step #9 Read the LockTime; a value currently always hard-coded to zero
bool processBlockData(const void *blockData, uint32_t blockLength, uint32_t &transactionIndex)
{
bool ret = true;
mBlockData = (const uint8_t *)blockData;
mBlockRead = mBlockData; // Set the block-read scan pointer.
mBlockEnd = &mBlockData[blockLength]; // Mark the end of block pointer
blockFormatVersion = readU32(); // Read the format version
previousBlockHash = readHash(); // get the address of the hash
merkleRoot = readHash(); // Get the address of the merkle root hash
gBlockTime = timeStamp = readU32(); // Get the timestamp
bits = readU32(); // Get the bits field
nonce = readU32(); // Get the 'nonce' random number.
transactionCount = readVariableLengthInteger(); // Read the number of transactions
assert(transactionCount < MAX_BLOCK_TRANSACTION);
if (transactionCount >= MAX_BLOCK_TRANSACTION)
{
logMessage("Too many transactions in the block: %d\r\n", transactionCount);
exit(1);
}
if (transactionCount < MAX_BLOCK_TRANSACTION)
{
transactions = mTransactions; // Assign the transactions buffer pointer
for (uint32_t i = 0; i < transactionCount; i++)
{
gTransactionIndex = i;
BlockChain::BlockTransaction &b = transactions[i];
if (!readTransaction(b, transactionIndex, i)) // Read the transaction; if it failed; then abort processing the block chain
{
ret = false;
break;
}
}
}