Initial commit

pom.xml

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>jmaa</groupId>
+  <artifactId>pbc-vanity-address</artifactId>
+  <packaging>jar</packaging>
+  <version>4.0.0</version>
+
+  <licenses>
+    <license>
+      <name>AGPL-3.0-or-later</name>
+      <url>https://www.gnu.org/licenses/agpl.txt</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+
+  <repositories>
+    <repository>
+      <id>gitlab-partisiablockchain</id>
+      <url>https://gitlab.com/api/v4/groups/12499775/-/packages/maven/</url>
+    </repository>
+  </repositories>
+
+  <parent>
+    <groupId>com.partisiablockchain</groupId>
+    <artifactId>pom</artifactId>
+    <version>4.57.0</version>
+  </parent>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.secata.tools</groupId>
+      <artifactId>coverage</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.partisiablockchain.core</groupId>
+      <artifactId>blockchain</artifactId>
+      <version>4.74.0</version>
+    </dependency>
+    <dependency>
+      <groupId>ch.qos.logback</groupId>
+      <artifactId>logback-classic</artifactId>
+      <version>1.4.12</version>
+    </dependency>
+  </dependencies>
+
+  <properties>
+    <maven.compiler.source>17</maven.compiler.source>
+    <maven.compiler.target>17</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+</project>

src/main/jmaa/pbc/PbcVanityAddressSearcher.java

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+package jmaa.pbc;
+
+/** Search for PBC vanity addresses.
+ *
+ * <p>Based on Jesper Balman Gravgaard's original version.
+ */
+public final class PbcVanityAddressSearcher {
+
+  /** The vanity prefix to hunt for. */
+  public static final String VANITY_PREFIX = "00badc0de";
+
+  @Test
+  void randomKeys() throws InterruptedException {
+    List<Thread> searchers = new ArrayList<>();
+    for(int i=0;i<8;i++) {
+      final Thread searcher = new Thread(new KeySearcher(i));
+      searcher.start();
+      searchers.add(searcher);
+    }
+
+    for (Thread searcher : searchers) {
+      searcher.join();
+    }
+
+  }
+
+  record KeySearcher(int id) implements Runnable {
+
+    @Override
+    public void run() {
+      long start = System.nanoTime();
+      for(int i=0;i<100_000_000;i++) {
+        final KeyPair keyPair = new KeyPair();
+        final BlockchainPublicKey publicKey = keyPair.getPublic();
+        final BlockchainAddress address = publicKey.createAddress();
+        if(address.writeAsString().startsWith(VANITY_PREFIX)) {
+          System.out.println("["+id+"] match: "+address.writeAsString()+ " - "+keyPair.getPrivateKey().toString(16));
+        }
+        if (i % 1_000_000 == 0) {
+          final long now = System.nanoTime();
+          final long duration = (now - start) / 1_000_000;
+          System.out.print("["+id+":"+i+"] "+duration+"    ");
+          start = now;
+        }
+        if ((id==0) && (i % 1_000_000 == 10_000)) {
+          System.out.println();
+        }
+      }
+    }
+  }
+
+}