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‎.gitignore

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# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
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# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
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# User-specific stuff
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.idea/**/workspace.xml
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.idea/**/tasks.xml
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.idea/**/usage.statistics.xml
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.idea/**/dictionaries
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.idea/**/shelf
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commit.bat
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# Generated files
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.idea/**/contentModel.xml
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# Sensitive or high-churn files
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.idea/**/dataSources/
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.idea/**/dataSources.ids
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.idea/**/dataSources.local.xml
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.idea/**/sqlDataSources.xml
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.idea/**/dynamic.xml
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.idea/**/uiDesigner.xml
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.idea/**/dbnavigator.xml
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# Gradle
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.idea/**/gradle.xml
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.idea/**/libraries
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.gradle/
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build/
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# Gradle and Maven with auto-import
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# When using Gradle or Maven with auto-import, you should exclude module files,
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# since they will be recreated, and may cause churn. Uncomment if using
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# auto-import.
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.idea/modules.xml
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.idea/*.iml
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.idea/modules
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*.iml
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# CMake
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cmake-build-*/
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# Mongo Explorer plugin
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.idea/**/mongoSettings.xml
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# File-based project format
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*.iws
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# IntelliJ
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out/
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# mpeltonen/sbt-idea plugin
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.idea_modules/
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# JIRA plugin
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atlassian-ide-plugin.xml
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# Cursive Clojure plugin
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.idea/replstate.xml
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# Crashlytics plugin (for Android Studio and IntelliJ)
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com_crashlytics_export_strings.xml
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crashlytics.properties
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crashlytics-build.properties
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fabric.properties
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# Editor-based Rest Client
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.idea/httpRequests
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# Android studio 3.1+ serialized cache file
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.idea/caches/build_file_checksums.ser
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# Application specific
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*.spv
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*.jrnl
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*.sqlite
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# Eclipse
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.settings
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.classpath
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.project

‎.travis.yml

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language: java
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jdk:
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- openjdk8
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sudo: false
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before_cache:
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- rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
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- rm -fr $HOME/.gradle/caches/*/plugin-resolution/
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cache:
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directories:
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- $HOME/.gradle/caches/
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- $HOME/.gradle/wrapper/
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before_install:
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- chmod +x gradlew
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install:
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- ./gradlew assemble
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script:
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- ./gradlew check
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‎LICENSE

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MIT License
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VeriBlock Blockchain Project
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Copyright (c) 2017-2018 VeriBlock, Inc
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Copyright (c) 2018-2019 Xenios SEZC
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All Rights Reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎README.md

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# VeriBlock Integration Library
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## Overview
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Altchains adopting Bitcoin security through VeriBlock will use the VeriBlock Integration Point
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to record and maintain SPV-level knowledge of VeriBlock (and by extension, Bitcoin). VTB
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payloads contained in PoP transactions on the altchain are
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provided to the VeriBlock integration point, from which it constructs the SPV view. During
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fork resolution over a keystone boundary, the altchain will consult the integration point to
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determine the timeliness of publications of its keystone periods to the VeriBlock blockchain.
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During normal operation, the integration point maintains a deterministic SPV-level view of
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VeriBlock based entirely on the VTB publications it has been provided. It maintains an
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association of these VTB payloads with their enclosing altchain block (by block number), so
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that altchain reorganizations can undo the state changes the unapplied blocks made to the
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integration point’s view of VeriBlock.
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During fork resolution, the integration point is temporarily updated with VTB information
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contained within the challenging fork to ensure the integration point’s view includes
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information stored in both forks. After fork resolution, the altchain sends a command to the
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integration point to clear the temporarily-added VTB payloads, which returns the integration
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point’s view to one which only reflects VTB payloads in the main chain. In the event that the
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challenging fork is selected, the altchain still sends the clear command, and then un-applies
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VTB payloads in the previously-main chain back to the forking point, and applies the new
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VTB payloads from the new fork.
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Appendix B of the document [Proof-of-Proof and VeriBlock Blockchain Protocol Consensus Algorithm and Economic Incentivization](https://mirror1.veriblock.org/Proof-of-Proof_and_VeriBlock_Blockchain_Protocol_Consensus_Algorithm_and_Economic_Incentivization_v1.0.pdf) contains details about the library's API and expected uses.

‎alt-integration-adapter-java/.gitignore

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# Gradle
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.idea/**/gradle.xml
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.idea/**/libraries
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.gradle/
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build/
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# Application specific
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*.spv
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*.jrnl
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tmp/
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data/
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*.log
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webservice.properties
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generated/
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# Eclipse
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.settings
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.classpath
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.project
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bin/

‎alt-integration-adapter-java/build.gradle

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plugins {
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id "java"
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id "java-library"
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}
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repositories {
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flatDir {
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dirs '../libs'
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}
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}
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version = '0.1.2'
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dependencies {
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testImplementation 'junit:junit:4.12'
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compile group: 'io.grpc', name: 'grpc-protobuf', version: '1.23.0'
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compile group: 'io.grpc', name: 'grpc-stub', version: '1.23.0'
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implementation name: 'integration-grpc-java-1.0'
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compile project(':core')
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compile project(':reference-lib')
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}

‎alt-integration-adapter-java/src/main/java/org/veriblock/protoconverters/AddressProtoConverter.java

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// VeriBlock Blockchain Project
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// Copyright 2017-2018 VeriBlock, Inc
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// Copyright 2018-2019 Xenios SEZC
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// All rights reserved.
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// https://www.veriblock.org
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// Distributed under the MIT software license, see the accompanying
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// file LICENSE or http://www.opensource.org/licenses/mit-license.php.
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package org.veriblock.protoconverters;
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import org.veriblock.sdk.Address;
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import integration.api.grpc.VeriBlockMessages;
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public final class AddressProtoConverter {
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private AddressProtoConverter() {} //never
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public static Address fromProto(VeriBlockMessages.Address protoData) {
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Address result = new Address(protoData.getAddress());
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return result;
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}
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public static VeriBlockMessages.Address toProto(Address data) {
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VeriBlockMessages.Address.Builder result = VeriBlockMessages.Address.newBuilder();
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result = result.setAddress(data.toString());
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return result.build();
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}
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}

‎alt-integration-adapter-java/src/main/java/org/veriblock/protoconverters/AltPublicationProtoConverter.java

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// VeriBlock Blockchain Project
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// Copyright 2017-2018 VeriBlock, Inc
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// Copyright 2018-2019 Xenios SEZC
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// All rights reserved.
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// https://www.veriblock.org
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// Distributed under the MIT software license, see the accompanying
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// file LICENSE or http://www.opensource.org/licenses/mit-license.php.
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package org.veriblock.protoconverters;
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import java.util.ArrayList;
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import java.util.List;
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import org.veriblock.sdk.AltPublication;
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import org.veriblock.sdk.VeriBlockBlock;
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import org.veriblock.sdk.VeriBlockMerklePath;
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import org.veriblock.sdk.VeriBlockTransaction;
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import integration.api.grpc.VeriBlockMessages;
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public final class AltPublicationProtoConverter {
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private AltPublicationProtoConverter() {} //never
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public static AltPublication fromProto(VeriBlockMessages.AltPublication protoData) {
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VeriBlockTransaction transaction = VeriBlockTransactionProtoConverter.fromProto(protoData.getTransaction());
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VeriBlockMerklePath merklePath = VeriBlockMerklePathProtoConverter.fromProto(protoData.getMerklePath());
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VeriBlockBlock containingBlock = VeriBlockBlockProtoConverter.fromProto(protoData.getContainingBlock());
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List<VeriBlockBlock> context = VeriBlockBlockProtoConverter.fromProto(protoData.getContextList());
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AltPublication result = new AltPublication(transaction, merklePath, containingBlock, context);
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return result;
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}
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public static List<AltPublication> fromProto(List<VeriBlockMessages.AltPublication> protoData) {
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List<AltPublication> result = new ArrayList<AltPublication>();
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for(VeriBlockMessages.AltPublication output : protoData) {
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result.add(fromProto(output));
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}
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return result;
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}
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public static VeriBlockMessages.AltPublication toProto(AltPublication data) {
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VeriBlockMessages.VeriBlockTransaction transaction = VeriBlockTransactionProtoConverter.toProto(data.getTransaction());
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String merklePath = data.getMerklePath().toCompactString();
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VeriBlockMessages.VeriBlockBlock containingBlock = VeriBlockBlockProtoConverter.toProto(data.getContainingBlock());
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List<VeriBlockMessages.VeriBlockBlock> context = VeriBlockBlockProtoConverter.toProto(data.getContext());
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VeriBlockMessages.AltPublication.Builder result = VeriBlockMessages.AltPublication.newBuilder();
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result = result.setTransaction(transaction)
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.setMerklePath(merklePath)
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.setContainingBlock(containingBlock)
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.addAllContext(context);
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return result.build();
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}
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public static List<VeriBlockMessages.AltPublication> toProto(List<AltPublication> data) {
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List<VeriBlockMessages.AltPublication> result = new ArrayList<>();
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for(AltPublication output : data) {
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result.add(toProto(output));
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}
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return result;
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}
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}

‎alt-integration-adapter-java/src/main/java/org/veriblock/protoconverters/BitcoinBlockProtoConverter.java

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// VeriBlock Blockchain Project
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// Copyright 2017-2018 VeriBlock, Inc
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// Copyright 2018-2019 Xenios SEZC
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// All rights reserved.
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// https://www.veriblock.org
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// Distributed under the MIT software license, see the accompanying
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// file LICENSE or http://www.opensource.org/licenses/mit-license.php.
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package org.veriblock.protoconverters;
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import java.util.ArrayList;
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import java.util.List;
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import org.veriblock.sdk.BitcoinBlock;
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import org.veriblock.sdk.Sha256Hash;
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import com.google.protobuf.ByteString;
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import integration.api.grpc.VeriBlockMessages;
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public final class BitcoinBlockProtoConverter {
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private BitcoinBlockProtoConverter() {} //never
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public static BitcoinBlock fromProto(VeriBlockMessages.BitcoinBlock protoData) {
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int version = protoData.getVersion();
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Sha256Hash previousBlock = Sha256Hash.wrap(protoData.getPreviousBlock().toByteArray(), protoData.getPreviousBlock().size());
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Sha256Hash merkleRoot = Sha256Hash.wrap(protoData.getMerkleRoot().toByteArray(), protoData.getMerkleRoot().size());
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int timestamp = protoData.getTimestamp();
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int bits = protoData.getBits();
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int nonce = protoData.getNonce();
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BitcoinBlock result = new BitcoinBlock(version, previousBlock, merkleRoot, timestamp, bits, nonce);
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return result;
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}
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public static List<BitcoinBlock> fromProto(List<VeriBlockMessages.BitcoinBlock> protoData) {
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List<BitcoinBlock> result = new ArrayList<BitcoinBlock>();
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for(VeriBlockMessages.BitcoinBlock output : protoData) {
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result.add(fromProto(output));
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}
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return result;
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}
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public static VeriBlockMessages.BitcoinBlock toProto(BitcoinBlock data) {
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int version = data.getVersion();
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byte[] previousBlock = data.getPreviousBlock().getBytes();
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byte[] merkleRoot = data.getMerkleRoot().getBytes();
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int timestamp = data.getTimestamp();
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int bits = data.getBits();
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int nonce = data.getNonce();
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VeriBlockMessages.BitcoinBlock.Builder result = VeriBlockMessages.BitcoinBlock.newBuilder();
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result = result.setVersion(version)
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.setPreviousBlock(ByteString.copyFrom(previousBlock))
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.setMerkleRoot(ByteString.copyFrom(merkleRoot))
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.setTimestamp(timestamp)
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.setBits(bits)
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.setNonce(nonce);
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return result.build();
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}
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public static List<VeriBlockMessages.BitcoinBlock> toProto(List<BitcoinBlock> data) {
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List<VeriBlockMessages.BitcoinBlock> result = new ArrayList<>();
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for(BitcoinBlock output : data) {
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result.add(toProto(output));
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}
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return result;
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}
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}

‎alt-integration-adapter-java/src/main/java/org/veriblock/protoconverters/BitcoinTransactionProtoConverter.java

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// VeriBlock Blockchain Project
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// Copyright 2017-2018 VeriBlock, Inc
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// Copyright 2018-2019 Xenios SEZC
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// All rights reserved.
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// https://www.veriblock.org
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// Distributed under the MIT software license, see the accompanying
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// file LICENSE or http://www.opensource.org/licenses/mit-license.php.
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package org.veriblock.protoconverters;
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import org.veriblock.sdk.BitcoinTransaction;
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import com.google.protobuf.ByteString;
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import integration.api.grpc.VeriBlockMessages;
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public final class BitcoinTransactionProtoConverter {
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private BitcoinTransactionProtoConverter() {} //never
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public static BitcoinTransaction fromProto(VeriBlockMessages.BitcoinTransaction protoData) {
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BitcoinTransaction result = new BitcoinTransaction(protoData.getRaw().toByteArray());
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return result;
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}
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public static VeriBlockMessages.BitcoinTransaction toProto(BitcoinTransaction data) {
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VeriBlockMessages.BitcoinTransaction.Builder result = VeriBlockMessages.BitcoinTransaction.newBuilder();
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result = result.setRaw(ByteString.copyFrom(data.getRawBytes()));
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return result.build();
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}
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}

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