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Add genesis block and block encoding

This commit is contained in:
nicksavers 2014-05-15 14:03:30 +02:00
parent 41862c44a1
commit 02bce31d63
4 changed files with 156 additions and 97 deletions
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95
ethereumj-core/src/main/java/org/ethereum/core/Block.java
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@ -1,6 +1,7 @@
package org.ethereum.core;
import org.ethereum.crypto.HashUtil;
import org.ethereum.util.RLP;
import org.ethereum.util.RLPElement;
import org.ethereum.util.RLPItem;
import org.ethereum.util.RLPList;
@ -25,7 +26,6 @@ public class Block {
private static int GAS_LIMIT = (int) Math.pow(10, 6);
private RLPList rawData;
private byte[] encodedBlock;
private boolean parsed = false;
private byte[] hash;
@ -77,14 +77,10 @@ public class Block {
this.parsed = false;
}
public Block(byte[] encodedBlock) {
this.encodedBlock = encodedBlock;
}
public Block(byte[] parentHash, byte[] unclesHash, byte[] coinbase,
byte[] stateRoot, byte[] txTrieRoot, byte[] difficulty,
long timestamp, long number, long minGasPrice, long gasLimit,
long gasUsed, byte[] extraData, byte[] nonce,
long number, long minGasPrice, long gasLimit, long gasUsed,
long timestamp, byte[] extraData, byte[] nonce,
List<Transaction> transactionsList, List<Block> uncleList) {
this.parentHash = parentHash;
this.unclesHash = unclesHash;
@ -92,11 +88,11 @@ public class Block {
this.stateRoot = stateRoot;
this.txTrieRoot = txTrieRoot;
this.difficulty = difficulty;
this.timestamp = timestamp;
this.number = number;
this.minGasPrice = minGasPrice;
this.gasLimit = gasLimit;
this.gasUsed = gasUsed;
this.timestamp = timestamp;
this.extraData = extraData;
this.nonce = nonce;
this.transactionsList = transactionsList;
@ -105,7 +101,7 @@ public class Block {
}
// [parent_hash, uncles_hash, coinbase, state_root, tx_trie_root,
// difficulty, timestamp, number, minGasPrice, gasLimit, gasUsed,
// difficulty, number, minGasPrice, gasLimit, gasUsed, timestamp,
// extradata, nonce]
private void parseRLP() {
@ -113,37 +109,38 @@ public class Block {
this.hash = HashUtil.sha3(params.getRLPData());
RLPList header = (RLPList) params.get(0);
this.parentHash = ((RLPItem) params.get(0)).getData();
this.unclesHash = ((RLPItem) params.get(1)).getData();
this.coinbase = ((RLPItem) params.get(2)).getData();
this.stateRoot = ((RLPItem) params.get(3)).getData();
this.txTrieRoot = ((RLPItem) params.get(4)).getData();
this.difficulty = ((RLPItem) params.get(5)).getData();
this.parentHash = ((RLPItem) header.get(0)).getData();
this.unclesHash = ((RLPItem) header.get(1)).getData();
this.coinbase = ((RLPItem) header.get(2)).getData();
this.stateRoot = ((RLPItem) header.get(3)).getData();
this.txTrieRoot = ((RLPItem) header.get(4)).getData();
this.difficulty = ((RLPItem) header.get(5)).getData();
byte[] tsBytes = ((RLPItem) params.get(6)).getData();
byte[] nrBytes = ((RLPItem) params.get(7)).getData();
byte[] gpBytes = ((RLPItem) params.get(8)).getData();
byte[] glBytes = ((RLPItem) params.get(9)).getData();
byte[] guBytes = ((RLPItem) params.get(10)).getData();
byte[] tsBytes = ((RLPItem) header.get(6)).getData();
byte[] nrBytes = ((RLPItem) header.get(7)).getData();
byte[] gpBytes = ((RLPItem) header.get(8)).getData();
byte[] glBytes = ((RLPItem) header.get(9)).getData();
byte[] guBytes = ((RLPItem) header.get(10)).getData();
this.timestamp = (new BigInteger(tsBytes)).longValue();
this.number = (new BigInteger(nrBytes)).longValue();
this.timestamp = tsBytes == null ? 0 : (new BigInteger(tsBytes)).longValue();
this.number = nrBytes == null ? 0 : (new BigInteger(nrBytes)).longValue();
this.minGasPrice = gpBytes == null ? 0 : (new BigInteger(gpBytes)).longValue();
this.gasLimit = glBytes == null ? 0 : (new BigInteger(glBytes)).longValue();
this.gasUsed = guBytes == null ? 0 : (new BigInteger(guBytes)).longValue();
this.extraData = ((RLPItem) params.get(11)).getData();
this.nonce = ((RLPItem) params.get(12)).getData();
this.extraData = ((RLPItem) header.get(11)).getData();
this.nonce = ((RLPItem) header.get(12)).getData();
// parse transactions
RLPList transactions = (RLPList) rawData.get(1);
RLPList transactions = (RLPList) params.get(1);
for (RLPElement rlpTx : transactions){
Transaction tx = new Transaction((RLPList)rlpTx);
this.transactionsList.add(tx);
}
// parse uncles
RLPList uncleBlocks = (RLPList) rawData.get(2);
RLPList uncleBlocks = (RLPList) params.get(2);
for (RLPElement rawUncle : uncleBlocks){
Block blockData = new Block((RLPList)rawUncle);
this.uncleList.add(blockData);
@ -153,7 +150,7 @@ public class Block {
public byte[] getHash(){
if (!parsed) parseRLP();
return hash;
return HashUtil.sha3(this.getEncoded());
}
public Block getParent() {
@ -224,16 +221,22 @@ public class Block {
public List<Transaction> getTransactionsList() {
if (!parsed) parseRLP();
if (transactionsList == null) {
this.transactionsList = new ArrayList<Transaction>();
}
return transactionsList;
}
public List<Block> getUncleList() {
if (!parsed) parseRLP();
if (uncleList == null) {
this.uncleList = new ArrayList<Block>();
}
return uncleList;
}
// [parent_hash, uncles_hash, coinbase, state_root, tx_trie_root,
// difficulty, timestamp, number, minGasPrice, gasLimit, gasUsed,
// difficulty, number, minGasPrice, gasLimit, gasUsed, timestamp,
// extradata, nonce]
@Override
public String toString() {
@ -247,11 +250,11 @@ public class Block {
", stateHash=" + Utils.toHexString(stateRoot) +
", txTrieHash=" + Utils.toHexString(txTrieRoot) +
", difficulty=" + Utils.toHexString(difficulty) +
", timestamp=" + timestamp +
", number=" + number +
", minGasPrice=" + minGasPrice +
", gasLimit=" + gasLimit +
", gasUsed=" + gasUsed +
", timestamp=" + timestamp +
", extraData=" + Utils.toHexString(extraData) +
", nonce=" + Utils.toHexString(nonce) +
']';
@ -284,11 +287,35 @@ public class Block {
}
public byte[] getEncoded() {
if (this.encodedBlock == null) parseRLP();
return this.encodedBlock;
}
byte[] parentHash = RLP.encodeElement(this.parentHash);
byte[] unclesHash = RLP.encodeElement(this.unclesHash);
byte[] coinbase = RLP.encodeElement(this.coinbase);
byte[] stateRoot = RLP.encodeElement(this.stateRoot);
byte[] txTrieRoot = RLP.encodeElement(this.txTrieRoot);
byte[] difficulty = RLP.encodeElement(this.difficulty);
byte[] number = RLP.encodeBigInteger(BigInteger.valueOf(this.number));
byte[] minGasPrice = RLP.encodeBigInteger(BigInteger.valueOf(this.minGasPrice));
byte[] gasLimit = RLP.encodeBigInteger(BigInteger.valueOf(this.gasLimit));
byte[] gasUsed = RLP.encodeBigInteger(BigInteger.valueOf(this.gasUsed));
byte[] timestamp = RLP.encodeBigInteger(BigInteger.valueOf(this.timestamp));
byte[] extraData = RLP.encodeElement(this.extraData);
byte[] nonce = RLP.encodeElement(this.nonce);
public byte[] hash() {
return HashUtil.sha3(this.getEncoded());
byte[] header = RLP.encodeList(parentHash, unclesHash, coinbase,
stateRoot, txTrieRoot, difficulty, number,
minGasPrice, gasLimit, gasUsed, timestamp, extraData, nonce);
byte[] transactions = RLP.encodeList();
byte[] uncles = RLP.encodeList();
return RLP.encodeList(header, transactions, uncles);
// TODO: Alternative clean way to encode, using RLP.encode() after it's optimized
// Object[] header = new Object[] { parentHash, unclesHash, coinbase,
// stateRoot, txTrieRoot, difficulty, number, minGasPrice,
// gasLimit, gasUsed, timestamp, extraData, nonce };
// Object[] transactions = this.getTransactionsList().toArray();
// Object[] uncles = this.getUncleList().toArray();
// return RLP.encode(new Object[] { header, transactions, uncles });
}
}

35
ethereumj-core/src/main/java/org/ethereum/core/Genesis.java Normal file
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@ -0,0 +1,35 @@
package org.ethereum.core;
import java.math.BigInteger;
import org.ethereum.crypto.HashUtil;
import org.ethereum.util.RLP;
import org.spongycastle.util.encoders.Hex;
public class Genesis extends Block {
private static byte[] zeroHash256 = new byte[32];
private static byte[] zeroHash160 = new byte[20];
private static byte[] sha3EmptyList = HashUtil.sha3(RLP.encodeList());
private static byte[] parentHash = zeroHash256;
private static byte[] unclesHash = sha3EmptyList;
private static byte[] coinbase = zeroHash160;
private static byte[] stateRoot = // TODO: Get stateRoot from actual state
Hex.decode("2f4399b08efe68945c1cf90ffe85bbe3ce978959da753f9e649f034015b8817d");
private static byte[] txTrieRoot = zeroHash256;
private static byte[] difficulty = BigInteger.valueOf((long) Math.pow(2, 22)).toByteArray();
private static long number = 0;
private static long minGasPrice = 0;
private static long gasLimit = 1000000;
private static long gasUsed = 0;
private static long timestamp = 0;
private static byte[] extraData = new byte[0];
private static byte[] nonce = HashUtil.sha3(new byte[]{42});
public Genesis() {
super(parentHash, unclesHash, coinbase, stateRoot,
txTrieRoot, difficulty, number, minGasPrice, gasLimit, gasUsed,
timestamp, extraData, nonce, null, null);
}
}

39
ethereumj-core/src/test/java/org/ethereum/block/BlockTest.java
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@ -2,7 +2,9 @@ package org.ethereum.block;
import org.spongycastle.util.encoders.Hex;
import org.ethereum.core.Block;
import org.ethereum.core.Genesis;
import org.ethereum.crypto.HashUtil;
import org.ethereum.util.ByteUtil;
import org.ethereum.util.RLP;
import org.ethereum.util.RLPList;
import org.junit.Test;
@ -11,6 +13,7 @@ import static org.junit.Assert.*;
import java.io.IOException;
import java.math.BigInteger;
import java.nio.ByteBuffer;
public class BlockTest {
@ -120,17 +123,12 @@ public class BlockTest {
public void testGenesisFromRLP(){
// from RLP encoding
byte[] genesisBytes = Hex.decode(CPP_PoC5_GENESIS_HEX_RLP_ENCODED);
Block genesis = new Block(genesisBytes);
assertEquals(CPP_PoC5_GENESIS_HEX_HASH, Hex.toHexString(genesis.hash()));
Block genesis = new Block(RLP.decode2(genesisBytes));
assertEquals(CPP_PoC5_GENESIS_HEX_HASH, Hex.toHexString(genesis.getHash()));
}
@Test
public void testGenesisFromNew() {
System.out.println(CPP_PoC5_GENESIS_HEX_RLP_ENCODED);
Object genesisItems = RLP.decode(Hex.decode(CPP_PoC5_GENESIS_HEX_RLP_ENCODED), 0).getDecoded();
// TODO: verify genesis items with expected values
/* From: https://ethereum.etherpad.mozilla.org/11
Genesis block is:
(
@ -149,30 +147,9 @@ public class BlockTest {
B32(sha3(B(42)))
)
*/
byte[] parentHash = new byte[32]; System.out.println(Hex.toHexString(parentHash));
byte[] unclesHash = HashUtil.sha3(new byte[0]); System.out.println(Hex.toHexString(unclesHash));
byte[] coinbase = new byte[20]; System.out.println(Hex.toHexString(coinbase));
byte[] stateRoot = Hex.decode(CPP_PoC5_GENESIS_STATE_ROOT_HEX_HASH); System.out.println(Hex.toHexString(stateRoot));
byte[] txTrieRoot = new byte[32]; System.out.println(Hex.toHexString(txTrieRoot));
byte[] difficulty = doubleToByteArray(Math.pow(2, 22)); System.out.println(Hex.toHexString(difficulty));
long timestamp = 0; System.out.println(Long.toHexString(timestamp));
long number = 0; System.out.println(Long.toHexString(number));
long minGasPrice = 0; System.out.println(Long.toHexString(minGasPrice));
long gasLimit = 1000000; System.out.println(Long.toHexString(gasLimit));
long gasUsed = 0; System.out.println(Long.toHexString(gasUsed));
byte[] extraData = new byte[0]; System.out.println(Hex.toHexString(extraData));
byte[] nonce = HashUtil.sha3(new byte[]{42}); System.out.println(Hex.toHexString(nonce));
Block block = new Block(parentHash, unclesHash, coinbase, stateRoot, txTrieRoot, difficulty, number, minGasPrice, gasLimit, gasUsed, timestamp, extraData, nonce, null, null);
assertEquals(CPP_PoC5_GENESIS_HEX_RLP_ENCODED, Hex.toHexString(block.getEncoded()));
assertEquals(CPP_PoC5_GENESIS_HEX_HASH, block.hash());
}
private byte[] doubleToByteArray(double d) {
byte[] output = new byte[8];
long lng = Double.doubleToLongBits(d);
for(int i = 0; i < 8; i++) output[i] = (byte)((lng >> ((7 - i) * 8)) & 0xff);
return output;
Block genesis = new Genesis();
assertEquals(CPP_PoC5_GENESIS_HEX_RLP_ENCODED, Hex.toHexString(genesis.getEncoded()));
assertEquals(CPP_PoC5_GENESIS_HEX_HASH, Hex.toHexString(genesis.getHash()));
}
@Test /* create BlockData from part of real RLP BLOCKS message */

42
ethereumj-core/src/test/java/org/ethereum/util/RLPTest.java
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