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Polkadot-Dart

Polkadot-Dart is a Dart-lang library to use access API of Polkadot network.

This library contains a set of crypto libraries and implementations of utils.

Table of content

1. Polkadot-Dart
   1. Table of content
   2. Status
      1. Milestone 1: finished
      2. Milestone 2: Under development
      3. Milestone 3: Awaits
   3. Manually Build
      1. Enviorment Settings
      2. Read before build
      3. LLVM and clang
      4. Flutter and Dart
      5. NDK and Android SDK
      6. Everything you need for rust
      7. Build rust lib to .so and .a manually
   4. Testing Guide
      1. Run a single unit test
      2. Run all tests
      3. Generate coverage
      4. Integration tests
      5. Mobile phone tests example

Status

Milestone 1: finished

Milestone 2: Under development

Milestone 3: Awaits

Manually Build

Enviorment Settings

• dart sdk: '>=2.7.0 < 3.0.0'
• flutter: '>=1.20.0 < 2.0.0'
• rust nightly latest
• MacOs or Linux

There are a few settings that needed before manually build, here is the guide. We will try to make a .make file afterwards to simply the process.

Read before build

1. There are dynamic libs to be build during the process.

2. This repository use CI to generate dynamic libs, tests are ensured passed, better not build them yourself.

LLVM and clang

With Macos (because we need to build iOS)

brew upgrade && brew install llvm

Flutter and Dart

1. Follow Download and Install guide

2. Verify your flutter version and env settings, make sure everything works

   flutter doctor -v
   

NDK and Android SDK

1. Android SDK(After Flutter is installed)

2. Download NDK and set NDK_HOME to env.

   export NDK_HOME=~/ndk/android-ndk-r21b
   # or if you use `ndk-bundle` of Android SDK locally, for macos:
   export ANDROID_HOME=~/Library/Android/sdk
   export ANDROID_NDK_HOME=~/Library/Android/sdk/ndk-bundle
   export NDK_HOME=~/Library/Android/sdk/ndk-bundle
   
   # and for linux, its like
   export NDK_HOME=/home/${User}/dev/android/ndk-bundle
   

Everything you need for rust

1. Install rust-lang and cargo, install here

2. All others are in /scripts folder, the steps below are not neccesary , just in-case something's missing.

   • Install cargo-lipo(for ios building) and cbindgen

   cargo install cargo-lipo && cargo install --force cbindgen
   

   • Install Android and iOS targets:

   rustup target add aarch64-linux-android armv7-linux-androideabi x86_64-linux-android i686-linux-android aarch64-apple-ios x86_64-apple-ios
   

Build rust lib to .so and .a manually

1. Build rust binding

./scripts/clean.sh && ./scripts/init.sh && ./scripts/build.sh

2. You can locate files in the android and ios folder.
   • Android: android/src/main/jniLibs/
   • iOS: ios
   • MacOS: macos (Caution: Build it on macos only)
   • Linux: linux (Caution: Build it on linux only)
   • Windows: windows (unavailable for now)

Testing Guide

Caution!! Do Not use flutter test directly

Run a single unit test

All test scripts are in /test folder. The folder structure matches the lib struture.

For example: A .dart file name hex.dart In lib folder, that is lib/utils/hex.dart In test folder, that is test/utils/hex.dart To test it, in root folder run flutter test test/utils/hex.dart

Run all tests

The polkadot_dart_test.dart is the entry of all unit tests, simply run:

flutter test test/polkadot_dart_test.dart

Generate coverage

1. if on MacOS, install lcov first:

   brew install lcov
   

2. if on Linux:

   sudo apt install lcov
   

3. then run:

   ./scripts/runTest.sh
   

Integration tests

TODO

Mobile phone tests example

Later