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23 01 25

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Сделал ещё более два поля в общем формате блоков блокчейна (перед самим блоком данных) и перед его цп

(все тесты проходят)
This commit is contained in:
AidarKC 2026-01-23 17:49:13 +03:00
parent 9f1ca37977
commit 580695b486
3 changed files with 176 additions and 58 deletions
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198
shine-server-blockchain/src/main/java/blockchain/BchBlockEntry.java
View File

@ -9,36 +9,65 @@ import java.util.Arrays;
import java.util.Objects; import java.util.Objects;
/** /**
* BchBlockEntry — универсальный блок нового формата. * BchBlockEntry — универсальный блок формата SHiNE (Frame v0).
* *
* RAW (BigEndian) = preimage: * =========================================================================
* [32] prevHash32 (SHA-256) hash предыдущего блока (цепочка) * FRAME v0 — ФИКСИРОВАННЫЙ ФОРМАТ БЛОКА (ДОКУМЕНТ ПРОТОКОЛА)
* [4] blockSize (int) = размер preimage (в байтах), БЕЗ signature64 * =========================================================================
* [4] blockNumber (int) глобальный номер блока (>=0)
* [8] timestamp (long) unix seconds
* *
* [2] type (short) тип сообщения * Все числа BigEndian.
* [2] subType (short) подтип сообщения
* [2] version (short) версия формата сообщения
* *
* PREIMAGE (входит в blockSize, подписывается):
* [2] frameCode (uint16) код/версия рамки:
* - 0x0000 = Frame v0 (текущий)
* [32] prevHash32 (bytes) SHA-256(preimage) предыдущего блока (цепочка)
* [4] blockSize (int32) размер preimage (в байтах), ВКЛЮЧАЯ frameCode,
* НО БЕЗ sigMarker и БЕЗ signature64
* [4] blockNumber (int32) глобальный номер блока (>=0)
* [8] timestamp (int64) unix seconds
* [2] type (uint16) тип сообщения
* [2] subType (uint16) подтип сообщения
* [2] version (uint16) версия формата сообщения
* [N] bodyBytes (bytes) тело сообщения (БЕЗ type/subType/version) * [N] bodyBytes (bytes) тело сообщения (БЕЗ type/subType/version)
* *
* TAIL (НЕ входит в blockSize): * TAIL (НЕ входит в blockSize, НЕ подписывается в Frame v0):
* [64] signature64 (Ed25519) подпись над hash32 * [2] sigMarker (uint16) маркер подписи:
* - 0x0100 (256) = далее подпись Ed25519 64 байта
* [64] signature64 (bytes) Ed25519 signature над hash32
* *
* hash32 ВНУТРИ БЛОКА НЕ ХРАНИМ. * hash32 НЕ хранится в блоке.
* hash32 вычисляется при парсинге: * hash32 вычисляется при парсинге:
* preimage = первые blockSize байт * preimage = первые blockSize байт
* hash32 = SHA-256(preimage) * hash32 = SHA-256(preimage)
*
* Правила MVP-парсера (Frame v0):
* - frameCode должен быть строго 0x0000, иначе REJECT.
* - sigMarker должен быть строго 0x0100, иначе REJECT.
* - подпись обязана присутствовать всегда (sigMarker+signature64).
* - НИКАКИХ fallback-веток “если маркер другой, то подписи нет/другой хвост”.
*
* Важно по безопасности:
* - sigMarker в v0 не входит в подписываемые байты → его можно подменить,
* поэтому единственная безопасная логика: "если не 0x0100 — reject".
* =========================================================================
*/ */
public final class BchBlockEntry { public final class BchBlockEntry {
public static final int SIGNATURE_LEN = 64; public static final int SIGNATURE_LEN = 64;
public static final int HASH_LEN = 32; public static final int HASH_LEN = 32;
public static final int FRAME_CODE_LEN = 2;
public static final int SIG_MARKER_LEN = 2;
/** Frame v0 */
public static final int FRAME_CODE_V0 = 0x0000;
/** sigMarker: 256 = 0x0100 */
public static final int SIG_MARKER_ED25519 = 0x0100;
/** /**
* Максимальный допустимый размер блока (preimage+signature), чтобы не уложить сервер по памяти/диску. * Максимальный допустимый размер блока (fullBytes = preimage + sigMarker + signature),
* 4 МБ — нормальный “потолок” под тексты/метаданные, и при этом защищает от мусора/атаки. * чтобы не уложить сервер по памяти/диску.
*/ */
public static final int MAX_BLOCK_FULL_BYTES = 4 * 1024 * 1024; public static final int MAX_BLOCK_FULL_BYTES = 4 * 1024 * 1024;
@ -48,9 +77,16 @@ public final class BchBlockEntry {
*/ */
public static final long MAX_FUTURE_SECONDS = 60; public static final long MAX_FUTURE_SECONDS = 60;
/** Размер фиксированного RAW-заголовка без body */ /**
public static final int RAW_HEADER_SIZE = * Размер фиксированной части PREIMAGE (без bodyBytes).
32 // prevHash32 *
* PREIMAGE header:
* frameCode(2) + prevHash32(32) + blockSize(4) + blockNumber(4) + timestamp(8)
* + type(2) + subType(2) + version(2)
*/
public static final int PREIMAGE_HEADER_SIZE =
2 // frameCode
+ 32 // prevHash32
+ 4 // blockSize + 4 // blockSize
+ 4 // blockNumber + 4 // blockNumber
+ 8 // timestamp + 8 // timestamp
@ -58,28 +94,34 @@ public final class BchBlockEntry {
+ 2 // subType + 2 // subType
+ 2; // version + 2; // version
// --- HEADER (RAW) --- /** Минимальный полный размер блока (без bodyBytes). */
public final byte[] prevHash32; // 32 public static final int MIN_FULL_BYTES =
public final int blockSize; // preimage size PREIMAGE_HEADER_SIZE + SIG_MARKER_LEN + SIGNATURE_LEN;
public final int blockNumber; // >=0
// --- HEADER (PREIMAGE) ---
public final int frameCode; // uint16 (v0=0)
public final byte[] prevHash32; // 32
public final int blockSize; // preimage size (включая frameCode)
public final int blockNumber; // >=0
public final long timestamp; public final long timestamp;
public final short type; public final short type;
public final short subType; public final short subType;
public final short version; public final short version;
// --- BODY (RAW) --- // --- BODY (PREIMAGE) ---
public final byte[] bodyBytes; public final byte[] bodyBytes;
/** Распарсенное тело (создаётся сразу при парсинге блока). */ /** Распарсенное тело (создаётся сразу при парсинге блока). */
public final BodyRecord body; public final BodyRecord body;
// --- TAIL --- // --- TAIL ---
private final byte[] signature64; // 64 public final int sigMarker; // uint16 (v0: 0x0100)
private final byte[] signature64; // 64
// --- derived --- // --- derived ---
private final byte[] hash32; // 32, computed private final byte[] hash32; // 32, computed
private final byte[] preimage; // blockSize bytes private final byte[] preimage; // blockSize bytes
private final byte[] fullBytes; // preimage + signature private final byte[] fullBytes; // preimage + sigMarker + signature
/* ===================================================================== */ /* ===================================================================== */
/* ====================== Конструктор из байт ========================== */ /* ====================== Конструктор из байт ========================== */
@ -88,8 +130,8 @@ public final class BchBlockEntry {
public BchBlockEntry(byte[] fullBytes) { public BchBlockEntry(byte[] fullBytes) {
Objects.requireNonNull(fullBytes, "fullBytes == null"); Objects.requireNonNull(fullBytes, "fullBytes == null");
if (fullBytes.length < RAW_HEADER_SIZE + SIGNATURE_LEN) { if (fullBytes.length < MIN_FULL_BYTES) {
throw new IllegalArgumentException("Block too short"); throw new IllegalArgumentException("Block too short: " + fullBytes.length + " < " + MIN_FULL_BYTES);
} }
if (fullBytes.length > MAX_BLOCK_FULL_BYTES) { if (fullBytes.length > MAX_BLOCK_FULL_BYTES) {
throw new IllegalArgumentException("Block too large: " + fullBytes.length + " > " + MAX_BLOCK_FULL_BYTES); throw new IllegalArgumentException("Block too large: " + fullBytes.length + " > " + MAX_BLOCK_FULL_BYTES);
@ -97,47 +139,77 @@ public final class BchBlockEntry {
ByteBuffer bb = ByteBuffer.wrap(fullBytes).order(ByteOrder.BIG_ENDIAN); ByteBuffer bb = ByteBuffer.wrap(fullBytes).order(ByteOrder.BIG_ENDIAN);
// [2] frameCode
this.frameCode = Short.toUnsignedInt(bb.getShort());
if (this.frameCode != FRAME_CODE_V0) {
throw new IllegalArgumentException(String.format(
"Bad frameCode: 0x%04X (expected 0x%04X)", this.frameCode, FRAME_CODE_V0
));
}
// [32] prevHash32
this.prevHash32 = new byte[32]; this.prevHash32 = new byte[32];
bb.get(this.prevHash32); bb.get(this.prevHash32);
// [4] blockSize
this.blockSize = bb.getInt(); this.blockSize = bb.getInt();
if (blockSize < RAW_HEADER_SIZE) { if (blockSize < PREIMAGE_HEADER_SIZE) {
throw new IllegalArgumentException("blockSize too small: " + blockSize); throw new IllegalArgumentException("blockSize too small: " + blockSize + " < " + PREIMAGE_HEADER_SIZE);
}
if (blockSize + SIGNATURE_LEN != fullBytes.length) {
throw new IllegalArgumentException("blockSize mismatch: blockSize=" + blockSize + " fullLen=" + fullBytes.length);
}
if (blockSize + SIGNATURE_LEN > MAX_BLOCK_FULL_BYTES) {
throw new IllegalArgumentException("Block too large by blockSize: " + (blockSize + SIGNATURE_LEN) + " > " + MAX_BLOCK_FULL_BYTES);
} }
// fullLen must match exactly: blockSize + sigMarker(2) + signature(64)
int expectedFullLen = blockSize + SIG_MARKER_LEN + SIGNATURE_LEN;
if (expectedFullLen != fullBytes.length) {
throw new IllegalArgumentException("blockSize mismatch: blockSize=" + blockSize
+ " expectedFullLen=" + expectedFullLen
+ " fullLen=" + fullBytes.length);
}
if (expectedFullLen > MAX_BLOCK_FULL_BYTES) {
throw new IllegalArgumentException("Block too large by blockSize: " + expectedFullLen + " > " + MAX_BLOCK_FULL_BYTES);
}
// [4] blockNumber
this.blockNumber = bb.getInt(); this.blockNumber = bb.getInt();
if (this.blockNumber < 0) { if (this.blockNumber < 0) {
throw new IllegalArgumentException("blockNumber < 0: " + this.blockNumber); throw new IllegalArgumentException("blockNumber < 0: " + this.blockNumber);
} }
// [8] timestamp
this.timestamp = bb.getLong(); this.timestamp = bb.getLong();
// запрет “в будущее” больше чем на 1 минуту // запрет “в будущее” больше чем на 1 минуту
long now = Instant.now().getEpochSecond(); long now = Instant.now().getEpochSecond();
if (this.timestamp > now + MAX_FUTURE_SECONDS) { if (this.timestamp > now + MAX_FUTURE_SECONDS) {
throw new IllegalArgumentException("timestamp is too far in future: ts=" + this.timestamp + " now=" + now + " maxFutureSec=" + MAX_FUTURE_SECONDS); throw new IllegalArgumentException("timestamp is too far in future: ts=" + this.timestamp
+ " now=" + now + " maxFutureSec=" + MAX_FUTURE_SECONDS);
} }
// [2][2][2] type/subType/version
this.type = bb.getShort(); this.type = bb.getShort();
this.subType = bb.getShort(); this.subType = bb.getShort();
this.version = bb.getShort(); this.version = bb.getShort();
int bodyLen = blockSize - RAW_HEADER_SIZE; // [N] bodyBytes
if (bodyLen < 0) throw new IllegalArgumentException("Invalid body length: " + bodyLen); int bodyLen = blockSize - PREIMAGE_HEADER_SIZE;
if (bodyLen < 0) {
throw new IllegalArgumentException("Invalid body length: " + bodyLen);
}
this.bodyBytes = new byte[bodyLen]; this.bodyBytes = new byte[bodyLen];
bb.get(this.bodyBytes); bb.get(this.bodyBytes);
// TAIL: [2] sigMarker
this.sigMarker = Short.toUnsignedInt(bb.getShort());
if (this.sigMarker != SIG_MARKER_ED25519) {
throw new IllegalArgumentException(String.format(
"Bad sigMarker: 0x%04X (expected 0x%04X)", this.sigMarker, SIG_MARKER_ED25519
));
}
// TAIL: [64] signature64
this.signature64 = new byte[SIGNATURE_LEN]; this.signature64 = new byte[SIGNATURE_LEN];
bb.get(this.signature64); bb.get(this.signature64);
// preimage = первые blockSize байт // preimage = первые blockSize байт (включая frameCode)
this.preimage = Arrays.copyOfRange(fullBytes, 0, blockSize); this.preimage = Arrays.copyOfRange(fullBytes, 0, blockSize);
// hash32 = sha256(preimage) // hash32 = sha256(preimage)
@ -148,7 +220,6 @@ public final class BchBlockEntry {
this.fullBytes = Arrays.copyOf(fullBytes, fullBytes.length); this.fullBytes = Arrays.copyOf(fullBytes, fullBytes.length);
// запрет мусора
if (bb.remaining() != 0) { if (bb.remaining() != 0) {
throw new IllegalArgumentException("Unexpected tail bytes, remaining=" + bb.remaining()); throw new IllegalArgumentException("Unexpected tail bytes, remaining=" + bb.remaining());
} }
@ -181,9 +252,11 @@ public final class BchBlockEntry {
// запрет “в будущее” больше чем на 1 минуту // запрет “в будущее” больше чем на 1 минуту
long now = Instant.now().getEpochSecond(); long now = Instant.now().getEpochSecond();
if (timestamp > now + MAX_FUTURE_SECONDS) { if (timestamp > now + MAX_FUTURE_SECONDS) {
throw new IllegalArgumentException("timestamp is too far in future: ts=" + timestamp + " now=" + now + " maxFutureSec=" + MAX_FUTURE_SECONDS); throw new IllegalArgumentException("timestamp is too far in future: ts=" + timestamp
+ " now=" + now + " maxFutureSec=" + MAX_FUTURE_SECONDS);
} }
this.frameCode = FRAME_CODE_V0;
this.prevHash32 = Arrays.copyOf(prevHash32, 32); this.prevHash32 = Arrays.copyOf(prevHash32, 32);
this.blockNumber = blockNumber; this.blockNumber = blockNumber;
this.timestamp = timestamp; this.timestamp = timestamp;
@ -191,11 +264,11 @@ public final class BchBlockEntry {
this.subType = subType; this.subType = subType;
this.version = version; this.version = version;
this.bodyBytes = Arrays.copyOf(bodyBytes, bodyBytes.length); this.bodyBytes = Arrays.copyOf(bodyBytes, bodyBytes.length);
this.signature64 = Arrays.copyOf(signature64, SIGNATURE_LEN);
this.blockSize = RAW_HEADER_SIZE + this.bodyBytes.length; // blockSize = размер preimage (включая frameCode)
this.blockSize = PREIMAGE_HEADER_SIZE + this.bodyBytes.length;
int fullLen = this.blockSize + SIGNATURE_LEN; int fullLen = this.blockSize + SIG_MARKER_LEN + SIGNATURE_LEN;
if (fullLen > MAX_BLOCK_FULL_BYTES) { if (fullLen > MAX_BLOCK_FULL_BYTES) {
throw new IllegalArgumentException("Block too large: " + fullLen + " > " + MAX_BLOCK_FULL_BYTES); throw new IllegalArgumentException("Block too large: " + fullLen + " > " + MAX_BLOCK_FULL_BYTES);
} }
@ -203,8 +276,13 @@ public final class BchBlockEntry {
// parse body по header + ОБЯЗАТЕЛЬНЫЙ check() // parse body по header + ОБЯЗАТЕЛЬНЫЙ check()
this.body = BodyRecordParser.parse(this.type, this.subType, this.version, this.bodyBytes); this.body = BodyRecordParser.parse(this.type, this.subType, this.version, this.bodyBytes);
// tail marker фиксирован
this.sigMarker = SIG_MARKER_ED25519;
this.signature64 = Arrays.copyOf(signature64, SIGNATURE_LEN);
// build preimage // build preimage
ByteBuffer pre = ByteBuffer.allocate(blockSize).order(ByteOrder.BIG_ENDIAN); ByteBuffer pre = ByteBuffer.allocate(blockSize).order(ByteOrder.BIG_ENDIAN);
pre.putShort((short) (FRAME_CODE_V0 & 0xFFFF));
pre.put(this.prevHash32); pre.put(this.prevHash32);
pre.putInt(this.blockSize); pre.putInt(this.blockSize);
pre.putInt(this.blockNumber); pre.putInt(this.blockNumber);
@ -217,24 +295,33 @@ public final class BchBlockEntry {
this.preimage = pre.array(); this.preimage = pre.array();
this.hash32 = BchCryptoVerifier.sha256(preimage); this.hash32 = BchCryptoVerifier.sha256(preimage);
ByteBuffer full = ByteBuffer.allocate(blockSize + SIGNATURE_LEN).order(ByteOrder.BIG_ENDIAN); // build fullBytes: preimage + sigMarker + signature64
ByteBuffer full = ByteBuffer.allocate(fullLen).order(ByteOrder.BIG_ENDIAN);
full.put(this.preimage); full.put(this.preimage);
full.putShort((short) (SIG_MARKER_ED25519 & 0xFFFF));
full.put(this.signature64); full.put(this.signature64);
this.fullBytes = full.array(); this.fullBytes = full.array();
} }
/* ===================================================================== */
/* ============================ Getters ================================= */
/* ===================================================================== */
public byte[] getPreimageBytes() { public byte[] getPreimageBytes() {
return Arrays.copyOf(preimage, preimage.length); return Arrays.copyOf(preimage, preimage.length);
} }
/** Возвращает подпись Ed25519 (64 байта). */
public byte[] getSignature64() { public byte[] getSignature64() {
return Arrays.copyOf(signature64, SIGNATURE_LEN); return Arrays.copyOf(signature64, SIGNATURE_LEN);
} }
/** Возвращает hash32 = SHA-256(preimage). */
public byte[] getHash32() { public byte[] getHash32() {
return Arrays.copyOf(hash32, HASH_LEN); return Arrays.copyOf(hash32, HASH_LEN);
} }
/** Возвращает полный блок: preimage + sigMarker + signature. */
public byte[] toBytes() { public byte[] toBytes() {
return Arrays.copyOf(fullBytes, fullBytes.length); return Arrays.copyOf(fullBytes, fullBytes.length);
} }
@ -249,7 +336,8 @@ public final class BchBlockEntry {
} }
return "BchBlockEntry{" return "BchBlockEntry{"
+ "HDR{" + "FRAME{frameCode=0x" + hex4(frameCode)
+ "}, HDR{"
+ "blockSize=" + blockSize + "blockSize=" + blockSize
+ ", blockNumber=" + blockNumber + ", blockNumber=" + blockNumber
+ ", timestamp=" + timestamp + " (" + timeIso + ")" + ", timestamp=" + timestamp + " (" + timeIso + ")"
@ -259,19 +347,25 @@ public final class BchBlockEntry {
+ ", prevHash32(hex)=" + toHex(prevHash32) + ", prevHash32(hex)=" + toHex(prevHash32)
+ "}" + "}"
+ ", BODY{len=" + (bodyBytes == null ? -1 : bodyBytes.length) + "}" + ", BODY{len=" + (bodyBytes == null ? -1 : bodyBytes.length) + "}"
+ ", TAIL{signature64(hex)=" + toHex(signature64) + "}" + ", TAIL{sigMarker=0x" + hex4(sigMarker) + ", signature64(hex)=" + toHex(signature64) + "}"
+ ", DERIVED{hash32(hex)=" + toHex(hash32) + "}" + ", DERIVED{hash32(hex)=" + toHex(hash32) + "}"
+ "}"; + "}";
} }
private static String hex4(int v) {
String s = Integer.toHexString(v & 0xFFFF);
while (s.length() < 4) s = "0" + s;
return s;
}
private static String toHex(byte[] bytes) { private static String toHex(byte[] bytes) {
if (bytes == null) return "null"; if (bytes == null) return "null";
char[] HEX = "0123456789abcdef".toCharArray(); char[] HEX = "0123456789abcdef".toCharArray();
char[] out = new char[bytes.length * 2]; char[] out = new char[bytes.length * 2];
for (int i = 0; i < bytes.length; i++) { for (int i = 0; i < bytes.length; i++) {
int v = bytes[i] & 0xFF; int vv = bytes[i] & 0xFF;
out[i * 2] = HEX[v >>> 4]; out[i * 2] = HEX[vv >>> 4];
out[i * 2 + 1] = HEX[v & 0x0F]; out[i * 2 + 1] = HEX[vv & 0x0F];
} }
return new String(out); return new String(out);
} }

6
shine-server-blockchain/src/main/java/blockchain/BchCryptoVerifier.java
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@ -6,9 +6,11 @@ import java.security.MessageDigest;
import java.util.Objects; import java.util.Objects;
/** /**
* Новый верификатор по ТЗ: * Верификатор SHiNE (Frame v0):
*
* preimage = первые blockSize байт блока (ВКЛЮЧАЯ frameCode=0x0000),
* = всё до TAIL (sigMarker+signature).
* *
* preimage = все байты блока без signature64
* hash32 = SHA-256(preimage) * hash32 = SHA-256(preimage)
* verify = Ed25519.verify(hash32, signature64, pubKey32) * verify = Ed25519.verify(hash32, signature64, pubKey32)
*/ */

30
src/test/java/test/it/blockchain/AddBlockSender.java
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@ -15,8 +15,9 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertNotNull;
/** /**
* AddBlockSender — под новый формат BchBlockEntry: * AddBlockSender — под новый формат BchBlockEntry (Frame v0):
* - block хранит только preimage + signature * - blockBytes = preimage + sigMarker(2) + signature64
* - preimage начинается с frameCode(2) = 0x0000
* - hash32 вычисляется как sha256(preimage) * - hash32 вычисляется как sha256(preimage)
* - signature = Ed25519.sign(hash32) * - signature = Ed25519.sign(hash32)
* *
@ -74,7 +75,9 @@ public final class AddBlockSender {
byte[] bodyBytes = body.toBytes(); byte[] bodyBytes = body.toBytes();
// ВАЖНО: preimage должен быть БАЙТ-В-БАЙТ таким же, как в BchBlockEntry
byte[] preimage = buildPreimage(prevHash32, blockNumber, tsSec, type, subType, version, bodyBytes); byte[] preimage = buildPreimage(prevHash32, blockNumber, tsSec, type, subType, version, bodyBytes);
byte[] hash32 = blockchain.BchCryptoVerifier.sha256(preimage); byte[] hash32 = blockchain.BchCryptoVerifier.sha256(preimage);
byte[] signature64 = utils.crypto.Ed25519Util.sign(hash32, loginPrivKey); byte[] signature64 = utils.crypto.Ed25519Util.sign(hash32, loginPrivKey);
@ -191,7 +194,7 @@ public final class AddBlockSender {
throw new IllegalArgumentException("Unknown body class: " + body.getClass()); throw new IllegalArgumentException("Unknown body class: " + body.getClass());
} }
// ---------- preimage builder (строго по BchBlockEntry) ---------- // ---------- preimage builder (строго по BchBlockEntry Frame v0) ----------
private static byte[] buildPreimage(byte[] prevHash32, private static byte[] buildPreimage(byte[] prevHash32,
int blockNumber, int blockNumber,
@ -201,17 +204,36 @@ public final class AddBlockSender {
short version, short version,
byte[] bodyBytes) { byte[] bodyBytes) {
int blockSize = BchBlockEntry.RAW_HEADER_SIZE + (bodyBytes == null ? 0 : bodyBytes.length); if (prevHash32 == null || prevHash32.length != 32) {
throw new IllegalArgumentException("prevHash32 must be 32 bytes");
}
int bodyLen = (bodyBytes == null ? 0 : bodyBytes.length);
int blockSize = BchBlockEntry.PREIMAGE_HEADER_SIZE + bodyLen;
java.nio.ByteBuffer bb = java.nio.ByteBuffer.allocate(blockSize).order(java.nio.ByteOrder.BIG_ENDIAN); java.nio.ByteBuffer bb = java.nio.ByteBuffer.allocate(blockSize).order(java.nio.ByteOrder.BIG_ENDIAN);
// [2] frameCode (v0)
bb.putShort((short) (BchBlockEntry.FRAME_CODE_V0 & 0xFFFF));
// [32] prevHash32
bb.put(prevHash32); bb.put(prevHash32);
// [4] blockSize (preimage size)
bb.putInt(blockSize); bb.putInt(blockSize);
// [4] blockNumber
bb.putInt(blockNumber); bb.putInt(blockNumber);
// [8] timestamp
bb.putLong(tsSec); bb.putLong(tsSec);
// [2][2][2] type/subType/version
bb.putShort(type); bb.putShort(type);
bb.putShort(subType); bb.putShort(subType);
bb.putShort(version); bb.putShort(version);
// [N] bodyBytes
if (bodyBytes != null) bb.put(bodyBytes); if (bodyBytes != null) bb.put(bodyBytes);
return bb.array(); return bb.array();