Code formatting
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@ -1,14 +1,12 @@
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package jmaa.pbc;
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import java.util.List;
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import com.partisiablockchain.BlockchainAddress;
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import com.partisiablockchain.crypto.KeyPair;
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import java.math.BigInteger;
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import java.util.ArrayList;
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import com.partisiablockchain.BlockchainAddress;
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import com.partisiablockchain.crypto.BlockchainPublicKey;
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import com.partisiablockchain.crypto.KeyPair;
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import java.util.List;
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/** Search for PBC vanity addresses.
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*/
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/** Search for PBC vanity addresses. */
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public final class PbcVanityAddressSearcher {
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private static final int NUM_THREADS = 8;
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@ -16,16 +14,17 @@ public final class PbcVanityAddressSearcher {
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private static final long INITIAL_PING_INTERVAL = 10_000;
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public static void main(String[] args) throws InterruptedException {
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final AddressRequirements requirements = parseArgumentsToRequirements(args);
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final AddressRequirements requirements = parseArgumentsToRequirements(args);
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searchForPrivateKeyWithVanityAddress(requirements);
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}
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private static void searchForPrivateKeyWithVanityAddress(AddressRequirements addressRequirements) throws InterruptedException {
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System.out.println("Searching for private key: %s".formatted(addressRequirements));
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System.out.println("Difficulty: 1/%s".formatted(addressRequirements.difficulty()));
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private static void searchForPrivateKeyWithVanityAddress(AddressRequirements addressRequirements)
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throws InterruptedException {
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System.out.println("Searching for private key: %s".formatted(addressRequirements));
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System.out.println("Difficulty: 1/%s".formatted(addressRequirements.difficulty()));
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List<Thread> searchers = new ArrayList<>();
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for(int threadIdx=0;threadIdx<NUM_THREADS ;threadIdx++) {
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for (int threadIdx = 0; threadIdx < NUM_THREADS; threadIdx++) {
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final Thread searcher = new Thread(new AddressSearcherThread(threadIdx, addressRequirements));
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searcher.start();
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searchers.add(searcher);
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@ -42,49 +41,58 @@ public final class PbcVanityAddressSearcher {
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* @param threadIx Id of thread
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* @param addressRequirements Requirements for the current search.
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*/
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private record AddressSearcherThread(int threadIdx, AddressRequirements addressRequirements) implements Runnable {
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private record AddressSearcherThread(int threadIdx, AddressRequirements addressRequirements)
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implements Runnable {
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@Override
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public void run() {
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long start = System.nanoTime();
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long pingInterval = INITIAL_PING_INTERVAL;
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for(int iterationIdx=1;iterationIdx<MAX_ITERATIONS_PER_THREAD;iterationIdx++) {
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// Generate random keypair
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for (int iterationIdx = 1; iterationIdx < MAX_ITERATIONS_PER_THREAD; iterationIdx++) {
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// Generate random keypair
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final KeyPair keyPair = new KeyPair();
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final BlockchainAddress address = keyPair.getPublic().createAddress();
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// Output if vain enough
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if(addressRequirements.satisfiedBy(address)) {
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System.out.println("[%2d:%10d] match: addr=%s - pk=%s".formatted(threadIdx, iterationIdx, address.writeAsString(), keyPair.getPrivateKey().toString(16)));
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if (addressRequirements.satisfiedBy(address)) {
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System.out.println(
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"[%2d:%10d] match: addr=%s - pk=%s"
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.formatted(
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threadIdx,
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iterationIdx,
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address.writeAsString(),
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keyPair.getPrivateKey().toString(16)));
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}
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// Ping
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if (iterationIdx % pingInterval == 0) {
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if (iterationIdx % pingInterval == 0) {
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final long now = System.nanoTime();
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final long duration = (now - start) / 1_000_000_000;
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System.out.println("[%2d:%10d] ping at %d sec".formatted(threadIdx, iterationIdx, duration));
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System.out.println(
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"[%2d:%10d] ping at %d sec".formatted(threadIdx, iterationIdx, duration));
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pingInterval = pingInterval * 2;
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}
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}
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}
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}
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private static AddressRequirements parseArgumentsToRequirements(String[] args) {
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String prefix = "00";
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String suffix = "";
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for (int idx = 0; idx < args.length; idx++) {
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final String word = args[idx];
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System.out.println("%s : %s".formatted(idx, word));
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if ("--prefix".equals(word)) {
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prefix = args[++idx];;
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} else if ("--suffix".equals(word)) {
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suffix = args[++idx];
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} else {
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throw new RuntimeException("Unknown argument: " + word);
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}
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private static AddressRequirements parseArgumentsToRequirements(String[] args) {
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String prefix = "00";
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String suffix = "";
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for (int idx = 0; idx < args.length; idx++) {
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final String word = args[idx];
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System.out.println("%s : %s".formatted(idx, word));
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if ("--prefix".equals(word)) {
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prefix = args[++idx];
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;
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} else if ("--suffix".equals(word)) {
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suffix = args[++idx];
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} else {
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throw new RuntimeException("Unknown argument: " + word);
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}
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}
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return new AddressRequirements(prefix, suffix);
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return new AddressRequirements(prefix, suffix);
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}
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/**
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@ -95,25 +103,21 @@ public final class PbcVanityAddressSearcher {
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*/
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private record AddressRequirements(String prefix, String suffix) {
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public AddressRequirements {
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if (!prefix.startsWith("00")) {
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throw new IllegalArgumentException("Vanity prefix must start with 00.");
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}
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public AddressRequirements {
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if (!prefix.startsWith("00")) {
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throw new IllegalArgumentException("Vanity prefix must start with 00.");
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}
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}
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/**
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* Whether the given address satisfies the requirements.
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*/
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public boolean satisfiedBy(BlockchainAddress address) {
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final String addressAsString = address.writeAsString();
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return addressAsString.startsWith(prefix) && addressAsString.endsWith(suffix);
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}
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/** Whether the given address satisfies the requirements. */
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public boolean satisfiedBy(BlockchainAddress address) {
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final String addressAsString = address.writeAsString();
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return addressAsString.startsWith(prefix) && addressAsString.endsWith(suffix);
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}
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/**
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* Attempts to measure the "one-in-X" factor.
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*/
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public BigInteger difficulty() {
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return BigInteger.ONE.shiftLeft(4*(prefix.length()-2 + suffix.length()));
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}
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/** Attempts to measure the "one-in-X" factor. */
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public BigInteger difficulty() {
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return BigInteger.ONE.shiftLeft(4 * (prefix.length() - 2 + suffix.length()));
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}
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}
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}
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