feat: add arkworks wrapper for bn128 operations #9

AllFi · 2023-09-20T13:59:12Z

This PR introduces LibarkworksWrapper that uses rust implementation from arkworks to provide necessary functions for BN128Addition, BN128Multiplication, and BN128Pairing precompiles.

This PR is the first step to resolve this issue. A preliminary discussion of this PR can be found here.

1. add rust crate with functions required for bn128 precompiles 2. make the necessary adjustments to include this crate in libsnarkjni 3. implement LibarkworksWrapper 4. add tests

halibobo1205 · 2023-09-25T07:02:06Z

3.10.0-1160.36.2.el7.x86_64 # 1 SMP Wed Jul 21 11:57:15 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

"Could not load library. Reasons: [java.lang.LinkageError: Unable to load library zksnarkjni, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-7289434056439766101.so, java.lang.LinkageError: Unable to load library from /home/java-tron/.hawtjni/zksnarkjni/libzksnarkjni-8327699144273145661.so]" type="java.lang.UnsatisfiedLinkError">java.lang.UnsatisfiedLinkError: Could not load library. Reasons: [java.lang.LinkageError: Unable to load library zksnarkjni, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-7289434056439766101.so, java.lang.LinkageError: Unable to load library from /home/java-tron/.hawtjni/zksnarkjni/libzksnarkjni-8327699144273145661.so]
at org.tron.common.zksnark.LibarkworksTest.libarkworksAddG1(LibarkworksTest.java:89)

halibobo1205 · 2023-09-25T07:45:47Z

@AllFi By the way, can you provide a version for arm64?
One more thing, strip can remove this debugging information and other data included in the executable which is not necessary for execution in order to reduce the size of the executable.
file libzksnarkjni.so
libzksnarkjni.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=a130c4231641dde2848aad767b53b9cf094c5b8c, not stripped
ll libzksnarkjni.so
8914960 Sep 25 15:39 libzksnarkjni.so
After stripped
file libzksnarkjni.so
libzksnarkjni.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=a130c4231641dde2848aad767b53b9cf094c5b8c, stripped
ll libzksnarkjni.so
3002048 Sep 25 15:40 libzksnarkjni.so

AllFi · 2023-09-25T11:45:09Z

Hello, @halibobo1205! Is it necessary to use a specific version of glibc for the arm64 build?

halibobo1205 · 2023-09-25T11:48:55Z

3.10.0-1160.36.2.el7.x86_64 # 1 SMP Wed Jul 21 11:57:15 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

"Could not load library. Reasons: [java.lang.LinkageError: Unable to load library zksnarkjni, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-7289434056439766101.so, java.lang.LinkageError: Unable to load library from /home/java-tron/.hawtjni/zksnarkjni/libzksnarkjni-8327699144273145661.so]" type="java.lang.UnsatisfiedLinkError">java.lang.UnsatisfiedLinkError: Could not load library. Reasons: [java.lang.LinkageError: Unable to load library zksnarkjni, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-7289434056439766101.so, java.lang.LinkageError: Unable to load library from /home/java-tron/.hawtjni/zksnarkjni/libzksnarkjni-8327699144273145661.so] at org.tron.common.zksnark.LibarkworksTest.libarkworksAddG1(LibarkworksTest.java:89)

@AllFi The error occurs on an x86 server.

halibobo1205 · 2023-09-25T11:50:45Z

Hello, @halibobo1205! Is it necessary to use a specific version of glibc for the arm64 build?

@AllFi , not required, because java-tron doesn't support arm64 currently.

1. strip linux64/libzksnarkjni.so 2. fix memcpy.c for aarch64 target 3. update linux64/aarch64/libsnarkjni.so

1. build libzksnarkjni.so on CentOS 7 2. update linux64/libzksnarkjni.so

AllFi · 2023-09-25T15:51:19Z

I managed to reproduce this error on CentOS 7:

[root@centos-s-2vcpu-2gb-lon1-01 zksnark-java-sdk]# uname -s -r
Linux 3.10.0-1160.45.1.el7.x86_64
[root@centos-s-2vcpu-2gb-lon1-01 zksnark-java-sdk]# ldd --version
ldd (GNU libc) 2.17

I rebuilt libzksnarkjni.so on this machine, and now it works properly. It also works on my Linux laptop.

I tried to build the aarch64 version of the library, but encountered this issue:

No symbol version section for versioned symbol `memcpy@GLIBC_2.2.5'

I applied a workaround from https://chromium.googlesource.com/external/github.com/google/protobuf/+/HEAD/ruby/ext/google/protobuf_c/wrap_memcpy.c in the cpp/src/memcpy.c file. With this adjustment, it works fine now.

Could you please confirm if the issue has been resolved?

halibobo1205 · 2023-09-26T07:44:13Z

@AllFi Hi, re-check on CentOS 7 x86_64, it works well.
As for the error, No symbol version section for versioned symbol 'memcpy@GLIBC_2.2.5', you can try it on linux 7 arm64, I've done it before. Feedback is appreciated when you try it!

r0wdy1 · 2023-09-26T07:59:44Z

As for the error, No symbol version section for versioned symbol 'memcpy@GLIBC_2.2.5', you can try it on linux 7 arm64, I've done it before. Feedback is appreciated when you try it!

Do you expect any more fixes? It seems that everything works

halibobo1205 · 2023-09-26T08:35:04Z

@r0wdy1 Hi,
system info : Linux 1804bbf650cf 5.10.104-linuxkit #1 SMP PREEMPT Wed Mar 9 19:01:25 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
docker info : arm64v8/centos:7
error log :

[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ zksnark-java-sdk ---
[INFO]
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.tron.common.zksnark.LibsodiumTest
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.087 s <<< FAILURE! - in org.tron.common.zksnark.LibsodiumTest
[ERROR] org.tron.common.zksnark.LibsodiumTest  Time elapsed: 0.086 s  <<< ERROR!
java.lang.UnsatisfiedLinkError: Could not load library. Reasons: [java.lang.LinkageError: Unable to load library zksnarkjni, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-6153043888255349959.so, java.lang.LinkageError: Unable to load library from /root/.hawtjni/zksnarkjni/libzksnarkjni-2395993998654073025.so, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-7507480833451540567.so, java.lang.LinkageError: Unable to load library from /root/.hawtjni/zksnarkjni/libzksnarkjni-9121779718342590029.so]
	at org.tron.common.zksnark.LibsodiumTest.librustzcashInitZksnarkParams(LibsodiumTest.java:44)

[INFO] Running org.tron.common.zksnark.LibarkworksTest
[ERROR] Tests run: 5, Failures: 0, Errors: 5, Skipped: 0, Time elapsed: 0.028 s <<< FAILURE! - in org.tron.common.zksnark.LibarkworksTest
[ERROR] libarkworksAddG1(org.tron.common.zksnark.LibarkworksTest)  Time elapsed: 0.025 s  <<< ERROR!
java.lang.UnsatisfiedLinkError: Could not load library. Reasons: [java.lang.LinkageError: Unable to load library zksnarkjni, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-2045370397893314252.so, java.lang.LinkageError: Unable to load library from /root/.hawtjni/zksnarkjni/libzksnarkjni-1571081008738642458.so, java.lang.LinkageError: Unable to load library from /tmp/libzksnarkjni-51807199268131437.so, java.lang.LinkageError: Unable to load library from /root/.hawtjni/zksnarkjni/libzksnarkjni-256481120846540177.so]
	at org.tron.common.zksnark.LibarkworksTest.libarkworksAddG1(LibarkworksTest.java:89)

[ERROR] libarkworksMulG1(org.tron.common.zksnark.LibarkworksTest)  Time elapsed: 0.001 s  <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class org.tron.common.zksnark.LibarkworksWrapper
	at org.tron.common.zksnark.LibarkworksTest.libarkworksMulG1(LibarkworksTest.java:118)

[ERROR] libarkworksG1IsValid(org.tron.common.zksnark.LibarkworksTest)  Time elapsed: 0 s  <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class org.tron.common.zksnark.LibarkworksWrapper
	at org.tron.common.zksnark.LibarkworksTest.libarkworksG1IsValid(LibarkworksTest.java:17)

[ERROR] libarkworksPairingCheck(org.tron.common.zksnark.LibarkworksTest)  Time elapsed: 0.002 s  <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class org.tron.common.zksnark.LibarkworksWrapper
	at org.tron.common.zksnark.LibarkworksTest.libarkworksPairingCheck(LibarkworksTest.java:138)

[ERROR] libarkworksG2IsValid(org.tron.common.zksnark.LibarkworksTest)  Time elapsed: 0 s  <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class org.tron.common.zksnark.LibarkworksWrapper
	at org.tron.common.zksnark.LibarkworksTest.libarkworksG2IsValid(LibarkworksTest.java:44)

[INFO] Running org.tron.common.zksnark.LibrustzcashTest
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.011 s <<< FAILURE! - in org.tron.common.zksnark.LibrustzcashTest
[ERROR] org.tron.common.zksnark.LibrustzcashTest  Time elapsed: 0.011 s  <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class org.tron.common.zksnark.LibrustzcashWrapper
	at org.tron.common.zksnark.LibrustzcashTest.librustzcashInitZksnarkParams(LibrustzcashTest.java:17)

[INFO]
[INFO] Results:
[INFO]
[ERROR] Errors:
[ERROR]   LibarkworksTest.libarkworksAddG1:89 ? UnsatisfiedLink Could not load library. ...
[ERROR]   LibarkworksTest.libarkworksG1IsValid:17 NoClassDefFound Could not initialize c...
[ERROR]   LibarkworksTest.libarkworksG2IsValid:44 NoClassDefFound Could not initialize c...
[ERROR]   LibarkworksTest.libarkworksMulG1:118 NoClassDefFound Could not initialize clas...
[ERROR]   LibarkworksTest.libarkworksPairingCheck:138 NoClassDefFound Could not initiali...
[ERROR]   LibrustzcashTest.librustzcashInitZksnarkParams:17 NoClassDefFound Could not in...
[ERROR]   LibsodiumTest.librustzcashInitZksnarkParams:44 ? UnsatisfiedLink Could not loa...
[INFO]
[ERROR] Tests run: 7, Failures: 0, Errors: 7, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

Then ,i rebuild it, there's still an error.

[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ zksnark-java-sdk ---
[INFO]
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.tron.common.zksnark.LibsodiumTest
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.374 s - in org.tron.common.zksnark.LibsodiumTest
[INFO] Running org.tron.common.zksnark.LibarkworksTest
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.805s
[INFO] Finished at: Tue Sep 26 08:28:59 UTC 2023
[INFO] Final Memory: 23M/271M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project zksnark-java-sdk: There are test failures.
[ERROR]
[ERROR] Please refer to /tmp/zksnark-java-sdk/target/surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
[ERROR] Command was /bin/sh -c cd /tmp/zksnark-java-sdk/target && /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.342.b07-1.el7_9.aarch64/jre/bin/java -javaagent:/root/.m2/repository/org/jacoco/org.jacoco.agent/0.8.8/org.jacoco.agent-0.8.8-runtime.jar=destfile=/tmp/zksnark-java-sdk/target/jacoco.exec -ea -jar /tmp/zksnark-java-sdk/target/surefire/surefirebooter1731445495970835878.jar /tmp/zksnark-java-sdk/target/surefire 2023-09-26T08-28-58_365-jvmRun1 surefire6294069238496356915tmp surefire_01543138630964026371tmp
[ERROR] Error occurred in starting fork, check output in log
[ERROR] Process Exit Code: 127
[ERROR] Crashed tests:
[ERROR] org.tron.common.zksnark.LibarkworksTest
[ERROR] org.apache.maven.surefire.booter.SurefireBooterForkException: The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
[ERROR] Command was /bin/sh -c cd /tmp/zksnark-java-sdk/target && /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.342.b07-1.el7_9.aarch64/jre/bin/java -javaagent:/root/.m2/repository/org/jacoco/org.jacoco.agent/0.8.8/org.jacoco.agent-0.8.8-runtime.jar=destfile=/tmp/zksnark-java-sdk/target/jacoco.exec -ea -jar /tmp/zksnark-java-sdk/target/surefire/surefirebooter1731445495970835878.jar /tmp/zksnark-java-sdk/target/surefire 2023-09-26T08-28-58_365-jvmRun1 surefire6294069238496356915tmp surefire_01543138630964026371tmp
[ERROR] Error occurred in starting fork, check output in log
[ERROR] Process Exit Code: 127
[ERROR] Crashed tests:
[ERROR] org.tron.common.zksnark.LibarkworksTest
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:669)
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:282)
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:245)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeProvider(AbstractSurefireMojo.java:1183)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeAfterPreconditionsChecked(AbstractSurefireMojo.java:1011)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.execute(AbstractSurefireMojo.java:857)
[ERROR] at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
[ERROR] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
[ERROR] at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
[ERROR] at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
[ERROR] at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
[ERROR] at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERROR] at java.lang.reflect.Method.invoke(Method.java:498)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:414)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:357)
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

AllFi · 2023-09-26T11:43:07Z

Hello, @halibobo1205! I managed to solve this by adding -pthread here:

	SET_TARGET_PROPERTIES( zksnarkjni PROPERTIES LINK_FLAGS "${LINK_FLAGS} -Wl,--wrap=memcpy -pthread" )

But I don't know if this solution is ok. I tried to build master branch in the arm64v8/centos:7 but I also got this error:

/usr/bin/ld: libzksnarkjni.so: No symbol version section for versioned symbol `memcpy@GLIBC_2.2.5'

So it seems the fix in the memcpy.c is still necessary.

What do you think the best way is to build it?

halibobo1205 · 2023-09-26T11:57:26Z

Hello, @halibobo1205! I managed to solve this by adding -pthread here:
	SET_TARGET_PROPERTIES( zksnarkjni PROPERTIES LINK_FLAGS "${LINK_FLAGS} -Wl,--wrap=memcpy -pthread" )
But I don't know if this solution is ok. I tried to build master branch in the arm64v8/centos:7 but I also got this error:
/usr/bin/ld: libzksnarkjni.so: No symbol version section for versioned symbol `memcpy@GLIBC_2.2.5'
So it seems the fix in the memcpy.c is still necessary.

What do you think the best way is to build it?

Sorry, I also tried again with M1 , it also failed. I may have tried to build successfully on M2 before, I can try again on M2, and if it still fails, will build it the way you suggested, but I'm not familiar with c and rust! Here's the repository for my previous build：https://github.com/halibobor/zksnark-java-sdk.

1. add -pthread flag to fix link error on arm 2. rebuild linux libs

halibobo1205 · 2023-09-26T13:03:03Z

@AllFi Sorry, I found the previous build log that shows memcpy@GLIBC_2.2.5 changed to memcpy@GLIBC_2.17.

halibobo1205

LGTM

AllFi · 2023-09-26T14:18:25Z

@AllFi Sorry, I found the previous build log that shows memcpy@GLIBC_2.2.5 changed to memcpy@GLIBC_2.17.

No problem, this solution also works for me with -pthread flag. I can replace my solution in memcpy.c with it if necessary. Thank you for your help!

feat: add arkworks wrapper for bn128 operations

413cb31

1. add rust crate with functions required for bn128 precompiles 2. make the necessary adjustments to include this crate in libsnarkjni 3. implement LibarkworksWrapper 4. add tests

AllFi mentioned this pull request Sep 20, 2023

feat(precompiles): optimize bn128 precompiles tronprotocol/java-tron#5507

Open

AllFi marked this pull request as ready for review September 20, 2023 15:45

AllFi mentioned this pull request Sep 20, 2023

Implement arkworks wrapper zkBob/zksnark-java-sdk#1

Draft

tomatoishealthy requested review from yanghang8612, Federico2014, 317787106, xxo1shine and halibobo1205 September 21, 2023 03:29

AllFi added 2 commits September 25, 2023 16:16

feat: update linux libs

f0aef8e

1. strip linux64/libzksnarkjni.so 2. fix memcpy.c for aarch64 target 3. update linux64/aarch64/libsnarkjni.so

feat: build libzksnarkjni.so on CentOS 7

ceb5b46

1. build libzksnarkjni.so on CentOS 7 2. update linux64/libzksnarkjni.so

feat: fix arm build on CentOS 7

a319f04

1. add -pthread flag to fix link error on arm 2. rebuild linux libs

halibobo1205 approved these changes Sep 26, 2023

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tomatoishealthy mentioned this pull request Oct 10, 2023

The upgrade for bn128 precompiles tronprotocol/java-tron#5529

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feat: add arkworks wrapper for bn128 operations #9

feat: add arkworks wrapper for bn128 operations #9

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feat: add arkworks wrapper for bn128 operations #9

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