settpay_sdk 1.0.3 settpay_sdk: ^1.0.3 copied to clipboard
Flutter SDK for building SettPay Plugins (SPs).
{settpay-sdk} #
SettPay Plugin SDK (SP-SDK) #
Flutter SDK for building SettPay Plugins (SPs). SDK for integrating blockchain network as a plugin.
Building a settpay_plugin dart package. #
1. Create your plugin repo #
create a dart package
flutter create --template=package sp_polkadot
cd sp_polkadot
add dependencies in pubspec.yaml
dependencies:
settpay_sdk: ^1.0.0
and install the dependencies.
flutter pub get
2. Build your polkadot-js wrapper #
The App use a polkadot-js/api
instance running in a hidden webView
to connect to remote node.
Example:
- SettPay.JS: https://github.com/setheum-js/settpay.js
3. Implement your plugin class #
Modify the plugin entry file(eg. sp_polkadot.dart),
create a PluginFoo
class extending SettPayPlugin
:
class PluginPolkadot extends SettPayPlugin {
/// define your own plugin
}
3.1. override SettPayPlugin.basic
@override
final basic = PluginBasicData(
name: 'polkadot',
ss58: 0,
primaryColor: Colors.deepPurple,
gradientColor: Colors.blue,
// The `bg.png` will be displayed as texture on a block with theme color,
// so it should have a transparent or dark background color.
backgroundImage: AssetImage('packages/sp_polkadot/assets/images/bg.png'),
icon:
Image.asset('packages/sp_polkadot/assets/images/logo.png'),
// The `logo_gray.png` should have a gray color `#9e9e9e`.
iconDisabled: Image.asset(
'packages/sp_polkadot/assets/images/logo_gray.png'),
isTestNet: false,
);
3.2. override SettPayPlugin.tokenIcons
Define the icon widgets so the SettPay App can display tokens of your para-chain with token icons.
@override
final Map<String, Widget> tokenIcons = {
'KSM': Image.asset(
'packages/sp_polkadot/assets/images/tokens/KSM.png'),
'DOT': Image.asset(
'packages/sp_polkadot/assets/images/tokens/DOT.png'),
};
3.3. override SettPayPlugin.nodeList
const node_list = [
{
'name': 'Kusama (Polkadot Canary, hosted by Parity)',
'ss58': 2,
'endpoint': 'wss://kusama-rpc.polkadot.io',
},
];
@override
List<NetworkParams> get nodeList {
return node_list.map((e) => NetworkParams.fromJson(e)).toList();
}
3.4. override SettPayPlugin.getNavItems(BuildContext, Keyring)
Define your custom navigation-item in BottomNavigationBar
of SettPay App.
The HomeNavItem.content
is the page content widget displayed while your navItem was selected.
@override
List<HomeNavItem> getNavItems(BuildContext context, Keyring keyring) {
return [
HomeNavItem(
text: 'Polkadot',
icon: SvgPicture.asset(
'packages/sp_polkadot/assets/images/logo.svg',
color: Theme.of(context).disabledColor,
),
iconActive: SvgPicture.asset(
'packages/sp_polkadot/assets/images/logo.svg'),
content: PolkadotEntry(this, keyring),
)
];
}
3.5. override SettPayPlugin.getRoutes(Keyring)
Define navigation route for your plugin pages.
@override
Map<String, WidgetBuilder> getRoutes(Keyring keyring) {
return {
TxConfirmPage.route: (_) =>
TxConfirmPage(this, keyring, _service.getPassword),
CurrencySelectPage.route: (_) => CurrencySelectPage(this),
AccountQrCodePage.route: (_) => AccountQrCodePage(this, keyring),
TokenDetailPage.route: (_) => TokenDetailPage(this, keyring),
TransferPage.route: (_) => TransferPage(this, keyring),
// other pages
// ...
};
}
3.6. override SettPayPlugin.loadJSCode()
method
Load the polkadot-js/api
wrapper you built in step 2.
@override
Future<String> loadJSCode() => rootBundle.loadString(
'packages/sp_polkadot/lib/js_service_polkadot/dist/main.js');
3.7. override plugin life-circle methods
- onWillStart(), you may want to prepare your plugin state data here.
- onStarted(), remote node connected, you may fetch data from network.
- onAccountChanged(), user just changed account, you may clear cache of the prev account and query data for new account.
// TODO: Add Example (Examples): // - sp_polkadot
4. Fetch data and build pages #
We use https://pub.dev/packages/mobx as the App state management tool. So the directories in a plugin looks like this:
__ lib
|__ pages (the UI)
|__ store (the MobX store)
|__ service (the Actions fired by UI to mutate the store)
|__ ...
To query data through SettPayPlugin.sdk.api
:
(settpay/sp_polkadot/lib/service/gov.dart
)
Future<List> queryReferendums() async {
final data = await api.gov.queryReferendums(keyring.current.address);
store.gov.setReferendums(data);
return data;
}
To query data by calling JS directly:
(settpay/sp_polkadot/lib/service/gov.dart
)
Future<void> updateBestNumber() async {
final int bestNumber = await api.service.webView
.evalJavascript('api.derive.chain.bestNumber()');
store.gov.setBestNumber(bestNumber);
}
While we set data to MobX store, the MobX Observer Flutter Widget will rebuild with new data.
5. Run your pages in example/
app #
You may want to run an example app in dev while building your plugin pages.
// TODO: Add Example (Examples): // - sp_polkadot
Updating Submodule #
git submodule update --remote
updates the submodules from remote origin.