├── .gitignore ├── LICENSE ├── README.md ├── build.gradle ├── build ├── kotlin-build │ └── version.txt └── tmp │ └── jar │ └── MANIFEST.MF ├── gradle └── wrapper │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── out └── production │ └── resources │ └── log4j2.xml ├── settings.gradle └── src ├── main ├── java │ └── com │ │ └── github │ │ └── yurivin │ │ └── blockjane │ │ ├── BlockJane.java │ │ ├── block │ │ ├── Block.java │ │ ├── GenesisBlock.java │ │ └── iBlock.java │ │ ├── blockchain │ │ ├── SimpleBlockchain.java │ │ └── iBlockchain.java │ │ ├── exception │ │ └── InvalidBlockchainStateException.java │ │ ├── hash │ │ ├── SHA256.java │ │ ├── iAlgo.java │ │ └── multihash │ │ │ ├── MerkleRoot.java │ │ │ └── iMultiHash.java │ │ ├── identity │ │ ├── PublicKeyIdentity.java │ │ └── iIdentity.java │ │ ├── infrastracture │ │ ├── Chaining.java │ │ └── Environment.java │ │ ├── proof │ │ ├── PoW.java │ │ └── iProof.java │ │ ├── serializers │ │ ├── CollectionSerializer.java │ │ └── iBlockSerializer.java │ │ ├── signature │ │ ├── ECDSASignature.java │ │ └── iSignature.java │ │ └── utils │ │ └── StringUtils.java └── resources │ └── log4j2.xml └── test └── java └── com └── github └── yurivin └── blockjane ├── TestBlock.java ├── TestBlockJane.java └── TestSignature.java /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled class file 2 | *.class 3 | 4 | # Log file 5 | *.log 6 | 7 | # BlueJ files 8 | *.ctxt 9 | 10 | # Mobile Tools for Java (J2ME) 11 | .mtj.tmp/ 12 | 13 | # Package Files # 14 | *.jar 15 | *.war 16 | *.ear 17 | *.zip 18 | *.tar.gz 19 | *.rar 20 | 21 | # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml 22 | hs_err_pid* 23 | 24 | .idea 25 | .gradle 26 | build 27 | /logs 28 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. For the purposes of this definition, 18 | "control" means (i) the power, direct or indirect, to cause the 19 | direction or management of such entity, whether by contract or 20 | otherwise, or (ii) ownership of fifty percent (50%) or more of the 21 | outstanding shares, or (iii) beneficial ownership of such entity. 22 | 23 | "You" (or "Your") shall mean an individual or Legal Entity 24 | exercising permissions granted by this License. 25 | 26 | "Source" form shall mean the preferred form for making modifications, 27 | including but not limited to software source code, documentation 28 | source, and configuration files. 29 | 30 | "Object" form shall mean any form resulting from mechanical 31 | transformation or translation of a Source form, including but 32 | not limited to compiled object code, generated documentation, 33 | and conversions to other media types. 34 | 35 | "Work" shall mean the work of authorship, whether in Source or 36 | Object form, made available under the License, as indicated by a 37 | copyright notice that is included in or attached to the work 38 | (an example is provided in the Appendix below). 39 | 40 | "Derivative Works" shall mean any work, whether in Source or Object 41 | form, that is based on (or derived from) the Work and for which the 42 | editorial revisions, annotations, elaborations, or other modifications 43 | represent, as a whole, an original work of authorship. For the purposes 44 | of this License, Derivative Works shall not include works that remain 45 | separable from, or merely link (or bind by name) to the interfaces of, 46 | the Work and Derivative Works thereof. 47 | 48 | "Contribution" shall mean any work of authorship, including 49 | the original version of the Work and any modifications or additions 50 | to that Work or Derivative Works thereof, that is intentionally 51 | submitted to Licensor for inclusion in the Work by the copyright owner 52 | or by an individual or Legal Entity authorized to submit on behalf of 53 | the copyright owner. For the purposes of this definition, "submitted" 54 | means any form of electronic, verbal, or written communication sent 55 | to the Licensor or its representatives, including but not limited to 56 | communication on electronic mailing lists, source code control systems, 57 | and issue tracking systems that are managed by, or on behalf of, the 58 | Licensor for the purpose of discussing and improving the Work, but 59 | excluding communication that is conspicuously marked or otherwise 60 | designated in writing by the copyright owner as "Not a Contribution." 61 | 62 | "Contributor" shall mean Licensor and any individual or Legal Entity 63 | on behalf of whom a Contribution has been received by Licensor and 64 | subsequently incorporated within the Work. 65 | 66 | 2. Grant of Copyright License. Subject to the terms and conditions of 67 | this License, each Contributor hereby grants to You a perpetual, 68 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 69 | copyright license to reproduce, prepare Derivative Works of, 70 | publicly display, publicly perform, sublicense, and distribute the 71 | Work and such Derivative Works in Source or Object form. 72 | 73 | 3. Grant of Patent License. Subject to the terms and conditions of 74 | this License, each Contributor hereby grants to You a perpetual, 75 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 76 | (except as stated in this section) patent license to make, have made, 77 | use, offer to sell, sell, import, and otherwise transfer the Work, 78 | where such license applies only to those patent claims licensable 79 | by such Contributor that are necessarily infringed by their 80 | Contribution(s) alone or by combination of their Contribution(s) 81 | with the Work to which such Contribution(s) was submitted. If You 82 | institute patent litigation against any entity (including a 83 | cross-claim or counterclaim in a lawsuit) alleging that the Work 84 | or a Contribution incorporated within the Work constitutes direct 85 | or contributory patent infringement, then any patent licenses 86 | granted to You under this License for that Work shall terminate 87 | as of the date such litigation is filed. 88 | 89 | 4. Redistribution. You may reproduce and distribute copies of the 90 | Work or Derivative Works thereof in any medium, with or without 91 | modifications, and in Source or Object form, provided that You 92 | meet the following conditions: 93 | 94 | (a) You must give any other recipients of the Work or 95 | Derivative Works a copy of this License; and 96 | 97 | (b) You must cause any modified files to carry prominent notices 98 | stating that You changed the files; and 99 | 100 | (c) You must retain, in the Source form of any Derivative Works 101 | that You distribute, all copyright, patent, trademark, and 102 | attribution notices from the Source form of the Work, 103 | excluding those notices that do not pertain to any part of 104 | the Derivative Works; and 105 | 106 | (d) If the Work includes a "NOTICE" text file as part of its 107 | distribution, then any Derivative Works that You distribute must 108 | include a readable copy of the attribution notices contained 109 | within such NOTICE file, excluding those notices that do not 110 | pertain to any part of the Derivative Works, in at least one 111 | of the following places: within a NOTICE text file distributed 112 | as part of the Derivative Works; within the Source form or 113 | documentation, if provided along with the Derivative Works; or, 114 | within a display generated by the Derivative Works, if and 115 | wherever such third-party notices normally appear. The contents 116 | of the NOTICE file are for informational purposes only and 117 | do not modify the License. You may add Your own attribution 118 | notices within Derivative Works that You distribute, alongside 119 | or as an addendum to the NOTICE text from the Work, provided 120 | that such additional attribution notices cannot be construed 121 | as modifying the License. 122 | 123 | You may add Your own copyright statement to Your modifications and 124 | may provide additional or different license terms and conditions 125 | for use, reproduction, or distribution of Your modifications, or 126 | for any such Derivative Works as a whole, provided Your use, 127 | reproduction, and distribution of the Work otherwise complies with 128 | the conditions stated in this License. 129 | 130 | 5. Submission of Contributions. Unless You explicitly state otherwise, 131 | any Contribution intentionally submitted for inclusion in the Work 132 | by You to the Licensor shall be under the terms and conditions of 133 | this License, without any additional terms or conditions. 134 | Notwithstanding the above, nothing herein shall supersede or modify 135 | the terms of any separate license agreement you may have executed 136 | with Licensor regarding such Contributions. 137 | 138 | 6. Trademarks. This License does not grant permission to use the trade 139 | names, trademarks, service marks, or product names of the Licensor, 140 | except as required for reasonable and customary use in describing the 141 | origin of the Work and reproducing the content of the NOTICE file. 142 | 143 | 7. Disclaimer of Warranty. Unless required by applicable law or 144 | agreed to in writing, Licensor provides the Work (and each 145 | Contributor provides its Contributions) on an "AS IS" BASIS, 146 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 147 | implied, including, without limitation, any warranties or conditions 148 | of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A 149 | PARTICULAR PURPOSE. You are solely responsible for determining the 150 | appropriateness of using or redistributing the Work and assume any 151 | risks associated with Your exercise of permissions under this License. 152 | 153 | 8. Limitation of Liability. In no event and under no legal theory, 154 | whether in tort (including negligence), contract, or otherwise, 155 | unless required by applicable law (such as deliberate and grossly 156 | negligent acts) or agreed to in writing, shall any Contributor be 157 | liable to You for damages, including any direct, indirect, special, 158 | incidental, or consequential damages of any character arising as a 159 | result of this License or out of the use or inability to use the 160 | Work (including but not limited to damages for loss of goodwill, 161 | work stoppage, computer failure or malfunction, or any and all 162 | other commercial damages or losses), even if such Contributor 163 | has been advised of the possibility of such damages. 164 | 165 | 9. Accepting Warranty or Additional Liability. While redistributing 166 | the Work or Derivative Works thereof, You may choose to offer, 167 | and charge a fee for, acceptance of support, warranty, indemnity, 168 | or other liability obligations and/or rights consistent with this 169 | License. However, in accepting such obligations, You may act only 170 | on Your own behalf and on Your sole responsibility, not on behalf 171 | of any other Contributor, and only if You agree to indemnify, 172 | defend, and hold each Contributor harmless for any liability 173 | incurred by, or claims asserted against, such Contributor by reason 174 | of your accepting any such warranty or additional liability. 175 | 176 | END OF TERMS AND CONDITIONS 177 | 178 | APPENDIX: How to apply the Apache License to your work. 179 | 180 | To apply the Apache License to your work, attach the following 181 | boilerplate notice, with the fields enclosed by brackets "[]" 182 | replaced with your own identifying information. (Don't include 183 | the brackets!) The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # java-blockchain-blockjane-framework-library 2 | BlockJane - Flexible blockchain framework for Java development 3 | 4 | ### Donate 5 | * LTC - LbcTExZ9EEUNp61dwDnJgYKAKoQq29vhEw 6 | * BTC - 1N6iBNAYiX5ybxdCWTJ9LMZDuQcXDQCLu9 7 | * ETH - 0x0d8a2920ccdb08959f2df1f939db5accd2558dfe 8 | * XEM - NBKENJ-Q5IS6C-NZEO6F-T5BM5S-K2IZZI-D5UCHJ-K3SF 9 | * NEO - ARLBymMsUDYyqe7QEpxsJGYCKTeZZ8UiQP 10 | ## Whitelist of BlockJane 11 | BlocJane ia a Java Blockchain library created for flexible and fast blockchain development for enterprise needs. 12 | 13 | ## Features 14 | 1. To create a chain of blocks and add a data in every block. Use it as a storage that provides data integrity and historical links to previous blocks. 15 | 2. Validate that data in blockchain is valid and every block is the same as it was created. If one block will be chainged, next blcok will show hash desintegration. Functionality provided by 16 | 3. Create Identities with privateKey and publicKey. May be used like wallets or KYC. 17 | 4. Signature. 18 | 5. MultiHash. 19 | 20 | ## TODO list 21 | 1. Make that when we change some blockchain properties Blockchain save info about nes state and time block of changing state. Also save initial state in blockchain. We need this to make possible validation of all blockchain after chaging properties like proofType, hashing algo, nonce and others. 22 | 2. Realize api to add data to new block 23 | 3. Write test for invalid chain hashes. When isChainValid method will give error of chain validation. 24 | 4. Add transaction history to the wallet 25 | 5. P2p node connection 26 | 6. Node discovery functionality. Simplest is by having 'ip:port' in config file. & Get from config server. & Get from other nodes. & Get from Torrent like network 27 | 7. Multi node proofType functionality 28 | 8. Smart contracts for JVM languages. Groovy & Kotlin & Scala $ Jyton & Jruby 29 | 9. Smart contracts fo javascript. Is it also exists on JVM? 30 | 10. At list one database serializer 31 | 32 | 33 | ## Links 34 | 35 | ### Beginners blockchain 36 | 1. Blockchain tutorial part 1: https://github.com/CryptoKass/NoobChain-Tutorial-Part-1 37 | 2. Blockchain tutorial part 2: https://github.com/CryptoKass/NoobChain-Tutorial-Part-2 38 | 3. List of other awesome blockchain tutorials: https://github.com/openblockchains/awesome-blockchains 39 | 4. Papers on blockchain (found by rjc): https://github.com/bellaj/Blockchain 40 | 5. Crypto wallet example: https://github.com/Levalicious/CryptoWallet 41 | 6. Peer to Peer sources: https://github.com/kgryte/awesome-peer-to-peer 42 | 7. Simple Java Blockchain: https://github.com/dottorm/SimpleBlockChain 43 | 8. Java Blockchain Example: https://github.com/TechPrimers/java-blockchain-example 44 | 9. Blockchain chaincode for Java developers from IBM: https://www.ibm.com/developerworks/library/j-chaincode-for-java-developers/j-chaincode-for-java-developers-pdf.pdf 45 | 10. SimpleBlockchain C#: https://github.com/thabart/SimpleBlockChain 46 | 47 | ### Smart contracts 48 | 1. Hello world Smart contract (Solidity tutorial): https://www.ethereum.org/greeter 49 | 2. Begginers guide - smart contracts (solidity video tutorial): https://www.youtube.com/watch?v=R_CiemcFKis 50 | 3. Neo Smart Contracts (C# tutorial): https://www.linkedin.com/pulse/neo-smart-contract-development-m%C3%A1t%C3%A9-moln%C3%A1r 51 | 52 | ### Production tools 53 | Using the right tools : 54 | 1. Coinbase API (useful for developing apps for bitcoin/ltc/eth): https://developers.coinbase.com/ 55 | 2. Remix - Browser based solidity editor (write and test ethereum smart contracts): https://remix.ethereum.org/ 56 | 3. BitcoinJ Java source code (have a browse through the bitcoinj repo): https://github.com/bitcoin-labs/bitcoinj-minimal/tree/master/core 57 | 4. HyperLedger fabric (permissioned blockchain framework): https://hyperledger.org/projects/fabric 58 | 5. HyperLedger sawtooth (blockchain with smart contract support): https://sawtooth.hyperledger.org/docs/core/releases/latest/introduction.html 59 | 6. Bouncey castle cryptographic library (Java library): https://www.bouncycastle.org/latest_releases.html 60 | 61 | 62 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | buildscript { 2 | ext.kotlin_version = '1.2.10' 3 | 4 | repositories { 5 | mavenCentral() 6 | } 7 | dependencies { 8 | classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" 9 | } 10 | } 11 | 12 | group 'github.com.yurivin.java.blockchain.blockjane' 13 | version '0.1.1' 14 | 15 | apply plugin: 'groovy' 16 | apply plugin: 'java' 17 | apply plugin: 'kotlin' 18 | apply plugin: 'idea' 19 | 20 | sourceCompatibility = 1.8 21 | 22 | repositories { 23 | mavenCentral() 24 | maven { url "https://plugins.gradle.org/m2/" } 25 | } 26 | 27 | dependencies { 28 | compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version" // to support smart contracts on kotlin 29 | compile 'org.codehaus.groovy:groovy-all:2.3.11' //to support smart contracts on groovy 30 | compile 'org.slf4j:slf4j-api:1.6.1' 31 | testCompile group: 'junit', name: 'junit', version: '4.12' 32 | compile 'org.apache.logging.log4j:log4j-api:2.9.1' 33 | compile 'org.apache.logging.log4j:log4j-slf4j-impl:2.9.1' 34 | compile 'org.apache.logging.log4j:log4j-to-slf4j:2.0-beta6' 35 | compile 'com.fasterxml.jackson.core:jackson-core:2.9.4' 36 | compile 'com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.9.4' 37 | compile 'org.bouncycastle:bcprov-jdk15on:1.59' 38 | } 39 | 40 | compileKotlin { 41 | kotlinOptions.jvmTarget = "1.8" 42 | } 43 | compileTestKotlin { 44 | kotlinOptions.jvmTarget = "1.8" 45 | } -------------------------------------------------------------------------------- /build/kotlin-build/version.txt: -------------------------------------------------------------------------------- 1 | 11001 -------------------------------------------------------------------------------- /build/tmp/jar/MANIFEST.MF: -------------------------------------------------------------------------------- 1 | Manifest-Version: 1.0 2 | 3 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Mon Mar 12 17:46:56 MSK 2018 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-4.0-all.zip 7 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Attempt to set APP_HOME 10 | # Resolve links: $0 may be a link 11 | PRG="$0" 12 | # Need this for relative symlinks. 13 | while [ -h "$PRG" ] ; do 14 | ls=`ls -ld "$PRG"` 15 | link=`expr "$ls" : '.*-> \(.*\)$'` 16 | if expr "$link" : '/.*' > /dev/null; then 17 | PRG="$link" 18 | else 19 | PRG=`dirname "$PRG"`"/$link" 20 | fi 21 | done 22 | SAVED="`pwd`" 23 | cd "`dirname \"$PRG\"`/" >/dev/null 24 | APP_HOME="`pwd -P`" 25 | cd "$SAVED" >/dev/null 26 | 27 | APP_NAME="Gradle" 28 | APP_BASE_NAME=`basename "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS="" 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn () { 37 | echo "$*" 38 | } 39 | 40 | die () { 41 | echo 42 | echo "$*" 43 | echo 44 | exit 1 45 | } 46 | 47 | # OS specific support (must be 'true' or 'false'). 48 | cygwin=false 49 | msys=false 50 | darwin=false 51 | nonstop=false 52 | case "`uname`" in 53 | CYGWIN* ) 54 | cygwin=true 55 | ;; 56 | Darwin* ) 57 | darwin=true 58 | ;; 59 | MINGW* ) 60 | msys=true 61 | ;; 62 | NONSTOP* ) 63 | nonstop=true 64 | ;; 65 | esac 66 | 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 68 | 69 | # Determine the Java command to use to start the JVM. 70 | if [ -n "$JAVA_HOME" ] ; then 71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 72 | # IBM's JDK on AIX uses strange locations for the executables 73 | JAVACMD="$JAVA_HOME/jre/sh/java" 74 | else 75 | JAVACMD="$JAVA_HOME/bin/java" 76 | fi 77 | if [ ! -x "$JAVACMD" ] ; then 78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 79 | 80 | Please set the JAVA_HOME variable in your environment to match the 81 | location of your Java installation." 82 | fi 83 | else 84 | JAVACMD="java" 85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 86 | 87 | Please set the JAVA_HOME variable in your environment to match the 88 | location of your Java installation." 89 | fi 90 | 91 | # Increase the maximum file descriptors if we can. 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 93 | MAX_FD_LIMIT=`ulimit -H -n` 94 | if [ $? -eq 0 ] ; then 95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 96 | MAX_FD="$MAX_FD_LIMIT" 97 | fi 98 | ulimit -n $MAX_FD 99 | if [ $? -ne 0 ] ; then 100 | warn "Could not set maximum file descriptor limit: $MAX_FD" 101 | fi 102 | else 103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 104 | fi 105 | fi 106 | 107 | # For Darwin, add options to specify how the application appears in the dock 108 | if $darwin; then 109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 110 | fi 111 | 112 | # For Cygwin, switch paths to Windows format before running java 113 | if $cygwin ; then 114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 116 | JAVACMD=`cygpath --unix "$JAVACMD"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Escape application args 158 | save () { 159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 160 | echo " " 161 | } 162 | APP_ARGS=$(save "$@") 163 | 164 | # Collect all arguments for the java command, following the shell quoting and substitution rules 165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 166 | 167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 169 | cd "$(dirname "$0")" 170 | fi 171 | 172 | exec "$JAVACMD" "$@" 173 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | set DIRNAME=%~dp0 12 | if "%DIRNAME%" == "" set DIRNAME=. 13 | set APP_BASE_NAME=%~n0 14 | set APP_HOME=%DIRNAME% 15 | 16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 17 | set DEFAULT_JVM_OPTS= 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windows variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | 53 | :win9xME_args 54 | @rem Slurp the command line arguments. 55 | set CMD_LINE_ARGS= 56 | set _SKIP=2 57 | 58 | :win9xME_args_slurp 59 | if "x%~1" == "x" goto execute 60 | 61 | set CMD_LINE_ARGS=%* 62 | 63 | :execute 64 | @rem Setup the command line 65 | 66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 67 | 68 | @rem Execute Gradle 69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 70 | 71 | :end 72 | @rem End local scope for the variables with windows NT shell 73 | if "%ERRORLEVEL%"=="0" goto mainEnd 74 | 75 | :fail 76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 77 | rem the _cmd.exe /c_ return code! 78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 79 | exit /b 1 80 | 81 | :mainEnd 82 | if "%OS%"=="Windows_NT" endlocal 83 | 84 | :omega 85 | -------------------------------------------------------------------------------- /out/production/resources/log4j2.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name = 'BlockJane' 2 | 3 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/BlockJane.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane; 2 | 3 | import com.github.yurivin.blockjane.infrastracture.Chaining; 4 | import com.github.yurivin.blockjane.infrastracture.Environment; 5 | import com.github.yurivin.blockjane.identity.iIdentity; 6 | import org.slf4j.Logger; 7 | import org.slf4j.LoggerFactory; 8 | 9 | import java.lang.reflect.Method; 10 | import java.security.PublicKey; 11 | 12 | public class BlockJane { 13 | 14 | private final Logger log = LoggerFactory.getLogger(getClass()); 15 | 16 | private boolean running; 17 | private final Environment env; 18 | 19 | public BlockJane(Environment env) { 20 | if(env == null) { 21 | throw new IllegalStateException("BlockJane environment should be not null"); 22 | } 23 | this.env = env; 24 | } 25 | 26 | public void run() { 27 | running = true; 28 | Thread chaining = new Thread(new Chaining(this)); 29 | chaining.start(); 30 | } 31 | 32 | public void addBlockData(String data) { 33 | env.blockchain.addBlockData(data); 34 | } 35 | 36 | public iIdentity getWallet(PublicKey publicKey) { 37 | return env.identities.get(publicKey); 38 | } 39 | 40 | public iIdentity createWallet() { 41 | try { 42 | Method m = env.identityType.getMethod("instantiate", Environment.class); 43 | return (iIdentity)m.invoke(null,env); 44 | } catch (Exception e) { 45 | throw new RuntimeException("Error creating identity", e); 46 | } 47 | } 48 | 49 | public boolean isRunning() { 50 | return running; 51 | } 52 | 53 | public Environment getEnv() { 54 | return env; 55 | } 56 | 57 | public void setRunning(boolean running) { 58 | this.running = running; 59 | } 60 | } 61 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/block/Block.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.block; 2 | 3 | import com.fasterxml.jackson.annotation.JsonIgnore; 4 | import com.github.yurivin.blockjane.infrastracture.Environment; 5 | import org.slf4j.Logger; 6 | import org.slf4j.LoggerFactory; 7 | 8 | import java.util.Date; 9 | 10 | public class Block implements iBlock { 11 | 12 | private final Logger log = LoggerFactory.getLogger(getClass()); 13 | 14 | protected Block(Environment env, String data) { 15 | this.env = env; 16 | this.timeStamp = new Date().getTime(); 17 | this.data = data; 18 | this.previousBlock = null; 19 | this.hash = env.proofType.proof(); 20 | this.id = 1L; 21 | } 22 | 23 | public Block(String data, iBlock previousBlock) { 24 | this.env = previousBlock.getEnv(); 25 | this.timeStamp = new Date().getTime(); 26 | this.data = data; 27 | this.previousBlock = previousBlock; 28 | this.hash = previousBlock.getEnv().proofType.proof(); 29 | this.id = previousBlock.getId() + 1; 30 | } 31 | 32 | public Block(String data, iBlock previousBlock, Environment env) { 33 | this.env = env != null ? env : previousBlock.getEnv(); 34 | this.timeStamp = new Date().getTime(); 35 | this.data = data; 36 | this.previousBlock = previousBlock; 37 | env.proofType.setBlockData(data); 38 | this.hash = env.proofType.proof(); 39 | this.id = previousBlock.getId() + 1; 40 | } 41 | 42 | private final Long id; 43 | private final String hash; 44 | @JsonIgnore 45 | private final iBlock previousBlock; 46 | private final String data; //our data will be a simple message. 47 | private final long timeStamp; //as number of milliseconds since 1/1/1970 in UTC. 48 | @JsonIgnore 49 | private final Environment env; 50 | 51 | @Override 52 | public String getHash() { 53 | return hash; 54 | } 55 | 56 | @Override 57 | public Environment getEnv() { 58 | return env; 59 | } 60 | 61 | @Override 62 | public Long getId() { 63 | return id; 64 | } 65 | 66 | @Override 67 | public iBlock getPreviousBlock() { 68 | return previousBlock; 69 | } 70 | 71 | @Override 72 | public String getData() { 73 | return data; 74 | } 75 | } 76 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/block/GenesisBlock.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.block; 2 | 3 | import com.github.yurivin.blockjane.block.Block; 4 | import com.github.yurivin.blockjane.infrastracture.Environment; 5 | 6 | public class GenesisBlock extends Block { 7 | /** 8 | * Different class for genesis block created to exclude of possibility 9 | * create a regular block with previous hash different from previous block transactionHash. 10 | * @param env 11 | * @param data 12 | */ 13 | public GenesisBlock(Environment env, String data) { 14 | super(env, data); 15 | } 16 | 17 | } 18 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/block/iBlock.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.block; 2 | 3 | import com.github.yurivin.blockjane.infrastracture.Environment; 4 | 5 | public interface iBlock { 6 | 7 | String getHash(); 8 | Environment getEnv(); 9 | Long getId(); 10 | iBlock getPreviousBlock(); 11 | String getData(); 12 | } 13 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/blockchain/SimpleBlockchain.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.blockchain; 2 | 3 | import com.fasterxml.jackson.core.JsonProcessingException; 4 | import com.fasterxml.jackson.databind.ObjectMapper; 5 | import com.github.yurivin.blockjane.block.Block; 6 | import com.github.yurivin.blockjane.block.GenesisBlock; 7 | import com.github.yurivin.blockjane.block.iBlock; 8 | import com.github.yurivin.blockjane.infrastracture.Environment; 9 | import org.slf4j.Logger; 10 | import org.slf4j.LoggerFactory; 11 | 12 | import java.util.ArrayList; 13 | import java.util.List; 14 | import java.util.Queue; 15 | import java.util.concurrent.ConcurrentLinkedQueue; 16 | 17 | public class SimpleBlockchain implements iBlockchain { 18 | 19 | private final Logger log = LoggerFactory.getLogger(getClass()); 20 | 21 | private ObjectMapper mapper = new ObjectMapper(); 22 | 23 | /** 24 | * This property should be not accessible out from this class. 25 | * It will cause blockchain integrity violation because blocks hash 26 | * inheritance will be broken. 27 | */ 28 | private final List blocksCache; 29 | public Environment env; 30 | /** 31 | * This property should be not accessible out from this class. 32 | * It will cause blockchain integrity violation because blocks hash 33 | * inheritance will be broken. 34 | */ 35 | private iBlock lastBlock; 36 | /** 37 | * Queue of data to add in to new blocks; 38 | */ 39 | private Queue blockDataQueue = new ConcurrentLinkedQueue<>(); 40 | 41 | 42 | public SimpleBlockchain() { 43 | this.blocksCache = new ArrayList<>(); 44 | } 45 | 46 | 47 | @Override 48 | public boolean newBlock() throws JsonProcessingException { 49 | iBlock newBlock = null; 50 | if (lastBlock == null) { 51 | newBlock = new GenesisBlock(env, "Genesis block data"); 52 | } else { 53 | newBlock = new Block(blockDataQueue.poll(), lastBlock, env); 54 | log.info("New block created: " + mapper.writeValueAsString(newBlock)); 55 | } 56 | lastBlock = newBlock; 57 | blocksCache.add(newBlock); 58 | return serialize(newBlock); 59 | } 60 | 61 | private boolean serialize(iBlock newBlock) { 62 | boolean serialized = false; 63 | List toRemoveList = new ArrayList<>(); 64 | if (blocksCache.size() > 0) { 65 | for (iBlock block : blocksCache) { 66 | serialized = env.blockSerializer.serialize(newBlock); 67 | if (!serialized) { 68 | break; 69 | } else { 70 | toRemoveList.add(block); 71 | } 72 | } 73 | blocksCache.removeAll(toRemoveList); 74 | } 75 | return serialized; 76 | } 77 | 78 | @Override 79 | public Environment setEnvironment(Environment env) { 80 | this.env = env; 81 | return this.env; 82 | } 83 | 84 | @Override 85 | public iBlock getLastBlock() { 86 | return lastBlock; 87 | } 88 | 89 | /** 90 | * Method to check chain integrity. 91 | * 92 | * @return 93 | */ 94 | @Override 95 | public Boolean isCachedChainValid() { 96 | return env.blockSerializer.isChainValid(blocksCache); 97 | } 98 | 99 | @Override 100 | public void addBlockData(String data) { 101 | blockDataQueue.add(data); 102 | } 103 | 104 | 105 | } 106 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/blockchain/iBlockchain.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.blockchain; 2 | 3 | import com.fasterxml.jackson.core.JsonProcessingException; 4 | import com.github.yurivin.blockjane.block.iBlock; 5 | import com.github.yurivin.blockjane.infrastracture.Environment; 6 | 7 | public interface iBlockchain { 8 | 9 | /** 10 | * Method to add block in to blockchain. 11 | * Should return 'true' if all pending blocks successfully serialized or saved in cash memory. 12 | * Saving in cache memory may can lead to the loss of blocks when the system falls. 13 | * If there is some problem with serialization, blockchain works properly, 14 | * but serializes all pending block when it is possible. 15 | * @return 16 | */ 17 | boolean newBlock() throws JsonProcessingException; 18 | 19 | Environment setEnvironment(Environment env); 20 | iBlock getLastBlock(); 21 | 22 | /** 23 | * Method to check the integrity of blockchain 24 | * @return 25 | */ 26 | Boolean isCachedChainValid(); 27 | 28 | /** 29 | * Method to add data to new block; 30 | * @param data 31 | */ 32 | void addBlockData(String data); 33 | } 34 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/exception/InvalidBlockchainStateException.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.exception; 2 | 3 | public class InvalidBlockchainStateException extends RuntimeException { 4 | 5 | public InvalidBlockchainStateException(String message) { 6 | super(message); 7 | } 8 | 9 | InvalidBlockchainStateException(String message, Throwable cause) { 10 | super(message, cause); 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/hash/SHA256.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.hash; 2 | 3 | import com.github.yurivin.blockjane.hash.iAlgo; 4 | import org.jetbrains.annotations.NotNull; 5 | 6 | import java.io.UnsupportedEncodingException; 7 | import java.security.MessageDigest; 8 | import java.security.NoSuchAlgorithmException; 9 | 10 | public class SHA256 implements iAlgo { 11 | @Override 12 | public String apply(String input) { 13 | try { 14 | return genHash(input); 15 | } 16 | catch(Exception e) { 17 | throw new RuntimeException(e); 18 | } 19 | } 20 | 21 | @NotNull 22 | private String genHash(String input) throws NoSuchAlgorithmException, UnsupportedEncodingException { 23 | MessageDigest digest = MessageDigest.getInstance("SHA-256"); 24 | //Applies sha256 to our input, 25 | byte[] hash = digest.digest(input.getBytes("UTF-8")); 26 | StringBuffer hexString = new StringBuffer(); // This will contain hash as hexidecimal 27 | for (int i = 0; i < hash.length; i++) { 28 | String hex = Integer.toHexString(0xff & hash[i]); 29 | if(hex.length() == 1) hexString.append('0'); 30 | hexString.append(hex); 31 | } 32 | return hexString.toString(); 33 | } 34 | } 35 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/hash/iAlgo.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.hash; 2 | 3 | public interface iAlgo { 4 | 5 | public String apply(String input); 6 | } 7 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/hash/multihash/MerkleRoot.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.hash.multihash; 2 | 3 | import com.github.yurivin.blockjane.infrastracture.Environment; 4 | 5 | import java.util.ArrayList; 6 | import java.util.List; 7 | 8 | public class MerkleRoot implements iMultiHash { 9 | 10 | public MerkleRoot(Environment env) { 11 | this.env = env; 12 | } 13 | 14 | private final Environment env; 15 | @Override 16 | public String apply(List hashes) { 17 | return null; 18 | } 19 | 20 | public String getMerkleRoot(List previousTreeLayer) { 21 | int count = previousTreeLayer.size(); 22 | 23 | List treeLayer = previousTreeLayer; 24 | while(count > 1) { 25 | treeLayer = new ArrayList(); 26 | for(int i=1; i < previousTreeLayer.size(); i++) { 27 | treeLayer.add(env.hashAlgo.apply(previousTreeLayer.get(i-1) + previousTreeLayer.get(i))); 28 | } 29 | count = treeLayer.size(); 30 | previousTreeLayer = treeLayer; 31 | } 32 | String merkleRoot = (treeLayer.size() == 1) ? treeLayer.get(0) : ""; 33 | return merkleRoot; 34 | } 35 | } 36 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/hash/multihash/iMultiHash.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.hash.multihash; 2 | 3 | import java.util.List; 4 | 5 | public interface iMultiHash { 6 | 7 | String apply(List hashes); 8 | } 9 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/identity/PublicKeyIdentity.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.identity; 2 | 3 | import com.github.yurivin.blockjane.infrastracture.Environment; 4 | import org.slf4j.Logger; 5 | import org.slf4j.LoggerFactory; 6 | 7 | import java.math.BigDecimal; 8 | import java.security.*; 9 | import java.security.spec.ECGenParameterSpec; 10 | 11 | import static com.github.yurivin.blockjane.utils.StringUtils.getStringFromKey; 12 | 13 | /** 14 | * Cryptography used - https://en.wikipedia.org/wiki/Elliptic-curve_cryptography 15 | */ 16 | 17 | public class PublicKeyIdentity implements iIdentity { 18 | 19 | private final Logger log = LoggerFactory.getLogger(getClass()); 20 | 21 | public PublicKeyIdentity(Environment env){ 22 | this.env = env; 23 | generateKeyPair(); 24 | } 25 | 26 | private PrivateKey privateKey; 27 | /** 28 | * Public key acts as an address in this identity 29 | */ 30 | private PublicKey publicKey; 31 | 32 | private Environment env; 33 | 34 | @Override 35 | public PublicKey getIdentityAddress() { 36 | return publicKey; 37 | } 38 | @Override 39 | public PublicKey getPublicKey() { 40 | return publicKey; 41 | } 42 | @Override 43 | public byte[] generateSignature(String data, PublicKey recipient) { 44 | data = getStringFromKey(publicKey) + getStringFromKey(recipient) + data.toString(); 45 | return env.signature.apply(privateKey,data); 46 | } 47 | 48 | /** 49 | * This method is used to create wallet instance in blockchain. 50 | * Every wallet should realize it. 51 | * @param env 52 | * @return 53 | */ 54 | public static iIdentity instantiate(Environment env) { 55 | return new PublicKeyIdentity(env); 56 | } 57 | 58 | private void generateKeyPair() { 59 | if(Security.getProvider("BC") == null) { 60 | Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); 61 | } 62 | try { 63 | KeyPairGenerator keyGen = KeyPairGenerator.getInstance("ECDSA","BC"); 64 | SecureRandom random = SecureRandom.getInstance("SHA1PRNG"); 65 | ECGenParameterSpec ecSpec = new ECGenParameterSpec("prime192v1"); 66 | // Initialize the key generator and generate a KeyPair 67 | keyGen.initialize(ecSpec, random); //256 bytes provides an acceptable security level 68 | KeyPair keyPair = keyGen.generateKeyPair(); 69 | // Set the public and private keys from the keyPair 70 | privateKey = keyPair.getPrivate(); 71 | publicKey = keyPair.getPublic(); 72 | }catch(Exception e) { 73 | throw new RuntimeException("Error generating keyPair for Wallet",e); 74 | } 75 | } 76 | 77 | 78 | } 79 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/identity/iIdentity.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.identity; 2 | 3 | import java.security.PublicKey; 4 | 5 | public interface iIdentity { 6 | 7 | PublicKey getIdentityAddress(); 8 | PublicKey getPublicKey(); 9 | byte[] generateSignature(String data, PublicKey recipient); 10 | 11 | } 12 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/infrastracture/Chaining.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.infrastracture; 2 | 3 | import com.github.yurivin.blockjane.BlockJane; 4 | import org.slf4j.Logger; 5 | import org.slf4j.LoggerFactory; 6 | 7 | public class Chaining implements Runnable { 8 | 9 | private final Logger log = LoggerFactory.getLogger(getClass()); 10 | 11 | private BlockJane blockJane; 12 | 13 | public Chaining(BlockJane blockJane) { 14 | this.blockJane = blockJane; 15 | } 16 | @Override 17 | public void run() { 18 | try { 19 | while (blockJane.isRunning()) { 20 | if (!blockJane.getEnv().blockchain.newBlock()) { 21 | throw new IllegalStateException("Node is broken. Can't create block"); 22 | } 23 | } 24 | } catch(Exception e) { 25 | log.error("Error in blockchain thread.", e); 26 | } 27 | } 28 | } 29 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/infrastracture/Environment.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.infrastracture; 2 | 3 | import com.github.yurivin.blockjane.blockchain.SimpleBlockchain; 4 | import com.github.yurivin.blockjane.blockchain.iBlockchain; 5 | import com.github.yurivin.blockjane.proof.PoW; 6 | import com.github.yurivin.blockjane.proof.iProof; 7 | import com.github.yurivin.blockjane.hash.SHA256; 8 | import com.github.yurivin.blockjane.hash.iAlgo; 9 | import com.github.yurivin.blockjane.serializers.CollectionSerializer; 10 | import com.github.yurivin.blockjane.serializers.iBlockSerializer; 11 | import com.github.yurivin.blockjane.signature.ECDSASignature; 12 | import com.github.yurivin.blockjane.signature.iSignature; 13 | import com.github.yurivin.blockjane.identity.PublicKeyIdentity; 14 | import com.github.yurivin.blockjane.identity.iIdentity; 15 | 16 | import java.security.PublicKey; 17 | import java.util.Map; 18 | import java.util.UUID; 19 | 20 | public class Environment { 21 | 22 | public Environment () { 23 | this.hashAlgo = new SHA256(); 24 | setBlockchain(new SimpleBlockchain()); 25 | this.blockSerializer = new CollectionSerializer(40); 26 | this.setProofType(new PoW()); 27 | this.identityType = PublicKeyIdentity.class; 28 | this.signature = new ECDSASignature(); 29 | } 30 | 31 | public Environment (iAlgo algo, iBlockchain blockchain, iBlockSerializer blockSerializer, iProof proofType, 32 | Class identityType, iSignature signature) { 33 | this.hashAlgo = algo; 34 | this.blockchain = blockchain; 35 | this.blockSerializer = blockSerializer; 36 | this.proofType = proofType; 37 | this.identityType = identityType; 38 | this.signature = signature; 39 | } 40 | 41 | public iAlgo hashAlgo; 42 | public iBlockchain blockchain; 43 | public iBlockSerializer blockSerializer; 44 | public iProof proofType; 45 | public Class identityType; 46 | public Map identities; 47 | public Long nodeStartupTime = System.currentTimeMillis(); 48 | public UUID nodeStartupUuid = UUID.randomUUID(); 49 | public iSignature signature; 50 | 51 | public void setBlockchain(iBlockchain blockchain) { 52 | this.blockchain = blockchain; 53 | blockchain.setEnvironment(this); 54 | } 55 | 56 | public void setProofType(iProof proofType) { 57 | this.proofType = proofType; 58 | proofType.setEnvironment(this); 59 | } 60 | } 61 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/proof/PoW.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.proof; 2 | 3 | import com.github.yurivin.blockjane.infrastracture.Environment; 4 | import org.slf4j.Logger; 5 | import org.slf4j.LoggerFactory; 6 | 7 | import java.util.Date; 8 | 9 | public class PoW implements iProof { 10 | 11 | private final Logger log = LoggerFactory.getLogger(getClass()); 12 | 13 | /** 14 | * The "nonce" field whose value is set so that the hash of the block will contain a run of leading zeros. 15 | */ 16 | private int nonce; 17 | private Environment env; 18 | private String blockData; 19 | private volatile int delayFactor = 3; 20 | 21 | @Override 22 | public String proof() { 23 | String hash = null; 24 | String target = new String(new char[delayFactor]).replace('\0', '0'); //Create a string with difficulty * "0" 25 | while (hash == null || !hash.substring(0, delayFactor).equals(target)) { 26 | nonce++; 27 | hash = calculateHash(); 28 | } 29 | log.info("Block hash found: " + hash); 30 | return hash; 31 | } 32 | 33 | @Override 34 | public void setBlockData(String data) { 35 | this.blockData = data; 36 | } 37 | 38 | @Override 39 | public void setEnvironment(Environment env) { 40 | this.env = env; 41 | } 42 | 43 | private String calculateHash() { 44 | String calculatedHash = "0"; 45 | if (env.blockchain.getLastBlock() != null) { 46 | calculatedHash = env.hashAlgo.apply( 47 | env.blockchain.getLastBlock().getHash() + 48 | Long.toString(new Date().getTime()) + 49 | nonce + 50 | blockData 51 | ); 52 | } else { 53 | calculatedHash = env.hashAlgo.apply( 54 | Long.toString(new Date().getTime()) + 55 | nonce + 56 | blockData 57 | ); 58 | } 59 | return calculatedHash; 60 | } 61 | 62 | @Override 63 | public int getDelayFactor() { 64 | return delayFactor; 65 | } 66 | 67 | @Override 68 | public void setDelayFactor(int delayFactor) { 69 | this.delayFactor = delayFactor; 70 | } 71 | } 72 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/proof/iProof.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.proof; 2 | 3 | 4 | import com.github.yurivin.blockjane.infrastracture.Environment; 5 | 6 | public interface iProof { 7 | /** 8 | * Method should return values which should be 9 | * @return 10 | */ 11 | String proof(); 12 | void setBlockData(String data); 13 | void setEnvironment(Environment env); 14 | /** 15 | * Get delayFactor. 16 | * Affects block creation time. 17 | * See more in SetDelayFactor method comment 18 | */ 19 | int getDelayFactor(); 20 | 21 | /** 22 | * Set delayFactor. 23 | * Some thing like difficulty for Pow algorithm. 24 | * Should affect block hash creation time. 25 | * For PoS or maybe other proof types it may be just delay value in seconds or milliseconds. 26 | * @param delayFactor 27 | */ 28 | void setDelayFactor(int delayFactor); 29 | } 30 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/serializers/CollectionSerializer.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.serializers; 2 | 3 | import com.github.yurivin.blockjane.block.iBlock; 4 | import com.github.yurivin.blockjane.exception.InvalidBlockchainStateException; 5 | import org.slf4j.Logger; 6 | import org.slf4j.LoggerFactory; 7 | 8 | import java.util.ArrayList; 9 | import java.util.List; 10 | 11 | public class CollectionSerializer implements iBlockSerializer { 12 | 13 | private final Logger log = LoggerFactory.getLogger(getClass()); 14 | 15 | private final List serializedBlocks; 16 | private int maxSize; 17 | public CollectionSerializer(int maxSize) { 18 | this.maxSize = maxSize; 19 | this.serializedBlocks = new ArrayList<>(maxSize); 20 | } 21 | 22 | @Override 23 | public boolean serialize(iBlock block) { 24 | try { 25 | if(serializedBlocks.size() > maxSize) { 26 | throw new InvalidBlockchainStateException("Riched max size of blockchain: " + maxSize); 27 | } 28 | serializedBlocks.add(block); 29 | return true; 30 | } catch(Exception e) { 31 | log.error("Error during serializing blocks", e); 32 | return false; 33 | } 34 | } 35 | 36 | @Override 37 | public Boolean isSerializedChainValid() { 38 | 39 | return isChainValid(serializedBlocks); 40 | } 41 | 42 | public Boolean isChainValid(List blocks) { 43 | //loop through blockchain to check hashes: 44 | for(int i=1; i < blocks.size(); i++) { 45 | iBlock currentBlock = blocks.get(i); 46 | //compare registered hash and calculated hash: 47 | if(!currentBlock.getHash().equals(currentBlock.getEnv().proofType.proof()) ){ 48 | log.error("Current Hashes not equal for block id: " + currentBlock.getHash()); 49 | return false; 50 | } 51 | } 52 | log.info("Validating blockchain: Chain is valid"); 53 | return true; 54 | } 55 | 56 | /** 57 | * Method for testing purposes 58 | * @return 59 | */ 60 | public List getSerializedBlocks() { 61 | return serializedBlocks; 62 | } 63 | } 64 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/serializers/iBlockSerializer.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.serializers; 2 | 3 | import com.github.yurivin.blockjane.block.iBlock; 4 | 5 | import java.util.List; 6 | 7 | public interface iBlockSerializer { 8 | 9 | /** 10 | * Returns true if block was serialized. 11 | * Return false if block was not successfully serialized. 12 | * @param block 13 | * @return 14 | */ 15 | boolean serialize(iBlock block); 16 | 17 | /** 18 | * Method to check serialized chain validity. 19 | * @return 20 | */ 21 | Boolean isSerializedChainValid(); 22 | 23 | /** 24 | * Method to check chain validity. 25 | * May be used for serialized and cached chains. 26 | * @param blocks 27 | * @return 28 | */ 29 | Boolean isChainValid(List blocks); 30 | } 31 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/signature/ECDSASignature.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.signature; 2 | 3 | import java.security.*; 4 | 5 | public class ECDSASignature implements iSignature { 6 | 7 | @Override 8 | public byte[] apply(PrivateKey privateKey, String input) { 9 | Signature dsa; 10 | byte[] output = new byte[0]; 11 | try { 12 | dsa = Signature.getInstance("ECDSA", "BC"); 13 | dsa.initSign(privateKey); 14 | byte[] strByte = input.getBytes(); 15 | dsa.update(strByte); 16 | byte[] realSig = dsa.sign(); 17 | output = realSig; 18 | } catch (Exception e) { 19 | throw new RuntimeException(e); 20 | } 21 | return output; 22 | } 23 | 24 | @Override 25 | public boolean verify(PublicKey publicKey, String data, byte[] signature) { 26 | try { 27 | Signature ecdsaVerify = Signature.getInstance("ECDSA", "BC"); 28 | ecdsaVerify.initVerify(publicKey); 29 | ecdsaVerify.update(data.getBytes()); 30 | return ecdsaVerify.verify(signature); 31 | }catch(Exception e) { 32 | throw new RuntimeException(e); 33 | } 34 | } 35 | } 36 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/signature/iSignature.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.signature; 2 | 3 | import java.security.PrivateKey; 4 | import java.security.PublicKey; 5 | 6 | public interface iSignature { 7 | 8 | byte[] apply(PrivateKey privateKey, String input); 9 | 10 | boolean verify(PublicKey publicKey, String data, byte[] signature); 11 | } 12 | -------------------------------------------------------------------------------- /src/main/java/com/github/yurivin/blockjane/utils/StringUtils.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane.utils; 2 | 3 | import java.security.Key; 4 | import java.util.Base64; 5 | 6 | public class StringUtils { 7 | 8 | public static String getStringFromKey(Key key) { 9 | return Base64.getEncoder().encodeToString(key.getEncoded()); 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /src/main/resources/log4j2.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /src/test/java/com/github/yurivin/blockjane/TestBlock.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane; 2 | 3 | import com.github.yurivin.blockjane.block.Block; 4 | import com.github.yurivin.blockjane.block.iBlock; 5 | import com.github.yurivin.blockjane.infrastracture.Environment; 6 | import com.github.yurivin.blockjane.block.GenesisBlock; 7 | import org.junit.Assert; 8 | import org.junit.Test; 9 | 10 | public class TestBlock { 11 | 12 | @Test 13 | public void testBlock() { 14 | Environment env = new Environment(); 15 | Block genesisBlock = new GenesisBlock(env, "Hi I'm a first block"); 16 | iBlock block = new Block("Hi I'm second block", genesisBlock); 17 | Assert.assertEquals(genesisBlock.getHash(), block.getPreviousBlock().getHash()); 18 | } 19 | } 20 | -------------------------------------------------------------------------------- /src/test/java/com/github/yurivin/blockjane/TestBlockJane.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane; 2 | 3 | import com.fasterxml.jackson.core.JsonProcessingException; 4 | import com.fasterxml.jackson.databind.ObjectMapper; 5 | import com.github.yurivin.blockjane.infrastracture.Environment; 6 | import com.github.yurivin.blockjane.identity.PublicKeyIdentity; 7 | import com.github.yurivin.blockjane.identity.iIdentity; 8 | import org.junit.Assert; 9 | import org.junit.Test; 10 | 11 | import java.util.logging.Logger; 12 | 13 | public class TestBlockJane { 14 | 15 | private final Logger LOG = Logger.getLogger(this.getClass().getName()); 16 | private ObjectMapper mapper = new ObjectMapper(); 17 | 18 | @Test 19 | public void mainTest() throws InterruptedException, JsonProcessingException { 20 | //Test Blockchain run 21 | Environment env = new Environment(); 22 | BlockJane blockJane = new BlockJane(env); 23 | blockJane.run(); 24 | //Test add data to the block 25 | blockJane.addBlockData("Test block data"); 26 | blockJane.addBlockData("Other test block data"); 27 | Thread.sleep(300); 28 | blockJane.setRunning(false); 29 | //Assert blocks were created 30 | Assert.assertNotNull(blockJane.getEnv().blockchain.getLastBlock()); 31 | //Assert that chain is valid. All blocks hashes are chained. 32 | Assert.assertTrue(blockJane.getEnv().blockchain.isCachedChainValid()); 33 | //Test identity creation 34 | iIdentity wallet = blockJane.createWallet(); 35 | Assert.assertNotNull(wallet); 36 | Assert.assertEquals(wallet.getClass(), PublicKeyIdentity.class); 37 | } 38 | 39 | } 40 | -------------------------------------------------------------------------------- /src/test/java/com/github/yurivin/blockjane/TestSignature.java: -------------------------------------------------------------------------------- 1 | package com.github.yurivin.blockjane; 2 | 3 | import com.github.yurivin.blockjane.identity.PublicKeyIdentity; 4 | import com.github.yurivin.blockjane.identity.iIdentity; 5 | import com.github.yurivin.blockjane.infrastracture.Environment; 6 | import org.junit.Assert; 7 | import org.junit.Test; 8 | 9 | import java.math.BigDecimal; 10 | import java.security.PublicKey; 11 | import java.security.Security; 12 | 13 | import static com.github.yurivin.blockjane.utils.StringUtils.getStringFromKey; 14 | 15 | public class TestSignature { 16 | 17 | @Test 18 | public void testECDSA() { 19 | Environment env = new Environment(); 20 | //Setup Bouncey castle as a Security Provider 21 | Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); 22 | //Create the new identities 23 | iIdentity walletA = new PublicKeyIdentity(env); 24 | iIdentity walletB = new PublicKeyIdentity(env); 25 | String data = "15"; 26 | byte[] signature = walletA.generateSignature(data, walletB.getPublicKey()); 27 | //Verify the signature works and verify it from the public key 28 | Assert.assertTrue(verifiySignature(signature, data, walletA.getPublicKey(), walletB.getPublicKey(), env)); 29 | } 30 | 31 | public boolean verifiySignature(byte[] signature, String data, PublicKey sender, PublicKey recipient,Environment env) { 32 | data = getStringFromKey(sender) + getStringFromKey(recipient) + data; 33 | return env.signature.verify(sender, data, signature); 34 | } 35 | } 36 | --------------------------------------------------------------------------------