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Block: Move NetworkParameters::createGenesis to Block

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Its a factory method for creating Blocks, so it really belongs
there. Moving it there will also help us move further along
our path to reduced mutability in the Block class.
This commit is contained in:
Sean Gilligan 2021-09-01 11:31:35 -07:00 committed by Andreas Schildbach
parent 05c911115e
commit c31d071a04
2 changed files with 25 additions and 29 deletions
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25
core/src/main/java/org/bitcoinj/core/Block.java
View File

@ -261,7 +261,30 @@ public class Block extends Message {
parseTransactions(offset + HEADER_SIZE);
length = cursor - offset;
}
static Block createGenesis(NetworkParameters n) {
Block genesisBlock = new Block(n, BLOCK_VERSION_GENESIS);
Transaction t = new Transaction(n);
try {
// A script containing the difficulty bits and the following message:
//
// "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks"
byte[] bytes = Utils.HEX.decode
("04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73");
t.addInput(new TransactionInput(n, t, bytes));
ByteArrayOutputStream scriptPubKeyBytes = new ByteArrayOutputStream();
Script.writeBytes(scriptPubKeyBytes, Utils.HEX.decode
("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f"));
scriptPubKeyBytes.write(ScriptOpCodes.OP_CHECKSIG);
t.addOutput(new TransactionOutput(n, t, FIFTY_COINS, scriptPubKeyBytes.toByteArray()));
} catch (Exception e) {
// Cannot happen.
throw new RuntimeException(e);
}
genesisBlock.addTransaction(t);
return genesisBlock;
}
public int getOptimalEncodingMessageSize() {
if (optimalEncodingMessageSize != 0)
return optimalEncodingMessageSize;

29
core/src/main/java/org/bitcoinj/core/NetworkParameters.java
View File

@ -17,9 +17,6 @@
package org.bitcoinj.core;
import org.bitcoinj.core.Block;
import org.bitcoinj.core.StoredBlock;
import org.bitcoinj.core.VerificationException;
import org.bitcoinj.net.discovery.*;
import org.bitcoinj.params.*;
import org.bitcoinj.script.*;
@ -29,7 +26,6 @@ import org.bitcoinj.store.BlockStoreException;
import org.bitcoinj.utils.MonetaryFormat;
import javax.annotation.*;
import java.io.*;
import java.math.*;
import java.util.*;
@ -103,30 +99,7 @@ public abstract class NetworkParameters {
protected volatile transient MessageSerializer defaultSerializer = null;
protected NetworkParameters() {
genesisBlock = createGenesis(this);
}
private static Block createGenesis(NetworkParameters n) {
Block genesisBlock = new Block(n, Block.BLOCK_VERSION_GENESIS);
Transaction t = new Transaction(n);
try {
// A script containing the difficulty bits and the following message:
//
// "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks"
byte[] bytes = Utils.HEX.decode
("04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73");
t.addInput(new TransactionInput(n, t, bytes));
ByteArrayOutputStream scriptPubKeyBytes = new ByteArrayOutputStream();
Script.writeBytes(scriptPubKeyBytes, Utils.HEX.decode
("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f"));
scriptPubKeyBytes.write(ScriptOpCodes.OP_CHECKSIG);
t.addOutput(new TransactionOutput(n, t, FIFTY_COINS, scriptPubKeyBytes.toByteArray()));
} catch (Exception e) {
// Cannot happen.
throw new RuntimeException(e);
}
genesisBlock.addTransaction(t);
return genesisBlock;
genesisBlock = Block.createGenesis(this);
}
public static final int TARGET_TIMESPAN = 14 * 24 * 60 * 60; // 2 weeks per difficulty cycle, on average.