[Flutter/Dart] Support Dart: Use Dart FFI #1264

hhstore · 2020-12-07T06:06:15Z

hhstore
Dec 7, 2020

Support Dart:

since i want to use wallet-core in dart.
so i try to use dart:ffi to make it.
but i am not quite familiar with wallet-core.
anyone who wants to help me? or any suggestions on where to start first?
i would really appreciate it.

my fork:

https://github.com/better-dart/trustwallet-core/tree/dart/ffi-base-on-v2.3.9
dev-branch: dart/ffi-base-on-v2.3.9
i will add dart:ffi to support dart here.

dart ffi:

libs:

https://github.com/dart-lang/ffi
https://github.com/dart-lang/ffigen
- a tool to auto gen binding codes.

usage: c++ with ffi

https://github.com/dart-lang/tflite_native

Maybe these are the things I need?

docs:

 pod 'TrustWalletCore'

android: https://developer.trustwallet.com/wallet-core/integration-guide/android-guide

jni load:

init {
    System.loadLibrary("TrustWalletCore")
}

go: https://developer.trustwallet.com/wallet-core/integration-guide/server-side

*.h

https://github.com/trustwallet/wallet-core/blob/81a5b234f6/include/TrustWalletCore/TWHDWallet.h

jni:

https://github.com/trustwallet/wallet-core/blob/81a5b234f6/jni/cpp/TWJNI.h

gen proto ?

iOS:

https://github.com/trustwallet/wallet-core/blob/81a5b234f6/tools/ios-build

Android:

https://github.com/trustwallet/wallet-core/blob/81a5b234f6/tools/android-build

code gen:

https://github.com/trustwallet/wallet-core/blob/99af2f62cd/codegen/lib/code_generator.rb

hhstore · 2020-12-07T09:50:44Z

hhstore
Dec 7, 2020
Author

The latest progress:

https://github.com/better-dart/wallet-core/blob/dart%2Fffi-base-on-v2.3.9/dart/README.md
the dart binding file has been successfully generated, and I am testing it.

pubspec.yaml

https://github.com/better-dart/wallet-core/blob/dart%2Fffi-base-on-v2.3.9/dart/pubspec.yaml

dart binding file:

https://github.com/better-dart/wallet-core/blob/dart%2Fffi-base-on-v2.3.9/dart/lib/wallet_core_bindings.dart#L7
this is the generate binding codes.

0 replies

hewigovens · 2020-12-07T15:36:38Z

hewigovens
Dec 7, 2020

Are you building dart bindings on top of existing iOS/android lib?

0 replies

hhstore · 2020-12-08T04:03:09Z

hhstore
Dec 8, 2020
Author

Are you building dart bindings on top of existing iOS/android lib?

i think i need iOS/Android dynamic library.
but i not sure, if Android wallet-core.aar is what i needed? or i should build a dynamic library by myself?
from this doc, https://developer.trustwallet.com/wallet-core/developing-the-library/releasing
- https://bintray.com/trust/wallet-core/com.trustwallet.wallet-core
i find android wallet-core.aar file.
i still working on how to add android wallet-core.aar to my flutter project and call it via dart binding codes, since the docs related to dart:ffi are really rare.
in this process, I encountered some problems, some errors. i'm working on it.

about dart ffi usage:

https://flutter.dev/docs/development/platform-integration/c-interop#step-3-load-the-code-using-the-ffi-library

rust + ffi + flutter:

i find a rust ffi binding usage here: https://github.com/Hentioe/mikack-ffi
- https://github.com/Hentioe/mikack-ffi/blob/master/Makefile#L42
this a rust ffi usage, use for a flutter project. i think i'm going to do something like this.

0 replies

hewigovens · 2020-12-17T03:54:19Z

hewigovens
Dec 17, 2020

Hey, what's status of dart binding? I think you can skip building process and unzip aar from here https://bintray.com/trust/wallet-core/com.trustwallet.wallet-core/2.4.1

0 replies

jayateertha043 · 2020-12-27T19:23:44Z

jayateertha043
Dec 27, 2020

Hey,
I was also looking for the same integration ,if you managed to integrate trust wallet into flutter kindly let me know

Thanks and regards
Jayateertha G

0 replies

jayateertha043 · 2020-12-27T19:24:48Z

jayateertha043
Dec 27, 2020

Can't we just put the aar files into android/lib/ folder and interact with them using method channel ?

0 replies

hhstore · 2020-12-29T04:31:39Z

hhstore
Dec 29, 2020
Author

@hewigovens

It's not going well.
I encountered some native-related problems, which I can't solve at the moment.
Due to time constraints, I am temporarily using the dart native library instead.
However, I will still consider replacing it with trustwallet-core.
I would still try the FFI or channel method to bind the trustwallet-core.

Follow up:

The latest developments will be synchronized in the following 2 projects.

use FFI:

https://github.com/better-dart/trustwallet-core

use Platform Channels:

https://github.com/better-dart/flutter_trust_wallet_core
channel method

0 replies

hhstore · 2020-12-29T04:39:57Z

hhstore
Dec 29, 2020
Author

@jayateertha043

Using the channel method is a good choice.
To use the channel method, you need to write Android/iOS native codes, but I'm not familiar with native.
If you are familiar with native coding, you can try it.

0 replies

weishirongzhen · 2021-08-19T07:34:35Z

weishirongzhen
Aug 19, 2021

I'm impl a Flutter plugin to doing this, most method are wrap, will keep updating, welcome pull request

https://github.com/weishirongzhen/flutter_trust_wallet_core

9 replies

weishirongzhen Aug 20, 2021

You can use ios lib from official, but android lib need's to be set preset visibility to default and rebuild from source, otherwise ffi can not lookup function from android side.

hhstore Aug 20, 2021
Author

My mistake. just noticed the flutter version. already supported null safety is great.

Is there any way to solve the android aar problem?

hhstore Aug 20, 2021
Author

I'm running the example on my iPhone, and it seems to be working fine with flutter.2.2.3.

I will take the time to migrate my project (previously using web3dart), thank you very much.

hhstore Aug 20, 2021
Author

https://discord.com/invite/MnDA9pfWAW

btw, I have created a discord technical discussion group, feel free to join and discuss flutter related technologies.

hhstore · 2021-08-20T05:02:11Z

hhstore
Aug 20, 2021
Author

a PR here:

fix - for publish to pub.dev, remove ios frameworks and android aar files weishirongzhen/flutter_trust_wallet_core#13
I replaced the iOS/Android framework dependencies with the official sources.
I submitted a PR, solving the problem of publishing to pub.dev.
I tested it locally for iOS and it works fine, but there are some issues with the Android dependency changes.
However, you can choose to keep the android aar, and you can submit https://pub.dev/ directly
Or, you can choose to fix the Android error and then publish it.
I'm not familiar with native, I can't fix this error. I need some help. The error message is here.
example run error: in the android environment with changing the sdk dependency weishirongzhen/flutter_trust_wallet_core#12

Android aar file:

https://github.com/weishirongzhen/flutter_trust_wallet_core/blob/main/android/libs/trustwalletcore.aar
just 12.5MB. it's ok for publish to https://pub.dev/ now.

iOS frameworks:

@weishirongzhen @hewigovens

0 replies

hhstore · 2021-08-20T05:11:16Z

hhstore
Aug 20, 2021
Author

btw, I suggest merging it flutter_trust_wallet_core into the official repo.
It is convenient for more people to use it.

2 replies

weishirongzhen Aug 23, 2021

There still lots of things todo, especially AnySigner and Protobuf side. Still lack of Complete test case, code check，and so on.... After all this done, then I'll consider make a pull request to this repo.

hewigovens Nov 24, 2021

Added to readme: https://github.com/trustwallet/wallet-core#community

baahkusi · 2021-10-22T15:33:30Z

baahkusi
Oct 22, 2021

Impressive work @weishirongzhen . Also started a trustwallet-core flutter plugin using methodChannels @hhstore . The project is at a much younger stage as a proof of concept but starting to get more attention.

https://github.com/EjaraApp/trustdart

0 replies

Ce1ling · 2024-02-28T03:42:01Z

Ce1ling
Feb 28, 2024

Hey 👋, do you guys have any updates on this matter? I think it’s really important to make it support Flutter.

0 replies

Ruyeduardo · 2024-02-28T18:48:05Z

Ruyeduardo
Feb 28, 2024

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0 replies

[Flutter/Dart] Support Dart: Use Dart FFI #1264

Support Dart:

my fork:

dart ffi:

libs:

usage: c++ with ffi

Maybe these are the things I need?

docs:

*.h

jni:

gen proto ?

iOS:

Android:

code gen:

Replies: 14 comments · 11 replies

hhstore Dec 7, 2020 Author

The latest progress:

pubspec.yaml

dart binding file:

hhstore Dec 8, 2020 Author

about dart ffi usage:

rust + ffi + flutter:

hhstore Dec 29, 2020 Author

Follow up:

use FFI:

use Platform Channels:

hhstore Dec 29, 2020 Author

hhstore Aug 20, 2021 Author

hhstore Aug 20, 2021 Author

hhstore Aug 20, 2021 Author

hhstore Aug 20, 2021 Author

hhstore Aug 20, 2021 Author

a PR here:

Android aar file:

iOS frameworks:

hhstore Aug 20, 2021 Author

Replies: 14 comments 11 replies

hhstore
Dec 7, 2020
Author

hhstore
Dec 8, 2020
Author

hhstore
Dec 29, 2020
Author

hhstore
Dec 29, 2020
Author

hhstore Aug 20, 2021
Author

hhstore Aug 20, 2021
Author

hhstore Aug 20, 2021
Author

hhstore Aug 20, 2021
Author

hhstore
Aug 20, 2021
Author

hhstore
Aug 20, 2021
Author