nkn_sdk_flutter

Description:

nkn sdk flutter

nkn-sdk-flutter #
Usage #
install #
void main() {
WidgetsFlutterBinding.ensureInitialized();
Wallet.install();
Client.install();
runApp(MyApp());
}
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Wallet #
Create wallet:
Wallet wallet = await Wallet.create(null, config: WalletConfig(password: '123'));
print(wallet.address);
print(wallet.seed);
print(wallet.publicKey);
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Export wallet to JSON string, where sensitive contents are encrypted by password provided in config:
wallet.keystore;
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By default the wallet will use RPC server provided by nkn.org. Any NKN full node can serve as a RPC server. To create a wallet using customized RPC server:
Wallet wallet = await Wallet.create(null, config: WalletConfig(password: '123', seedRPCServerAddr: ['http://seed.nkn.org:30003']));
print(wallet.address);
print(wallet.seed);
print(wallet.publicKey);
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Load wallet from JSON string, note that the password needs to be the same as the one provided when creating wallet:
Wallet wallet = await Wallet.restore(w.keystore,
config: WalletConfig(password: '123'));
print(wallet.address);
print(wallet.seed);
print(wallet.publicKey);

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Query asset balance for this wallet:
double balance = await wallet.getBalance();
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Transfer asset to some address:
String txHash = await wallet.transfer(NKN_ADDRESS, '1.23');
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Client #
NKN Client provides low level p2p messaging through NKN network.
Create a client with a generated key pair:
var client = await Client.create(WALLET_SEED);
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Listen for connection established:
client.onConnect.listen((event) {
print(event.node);
});
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Receive data from other clients
client.onMessage.listen((event) {
print(event.type);
print(event.encrypted);
print(event.messageId);
print(event.data);
print(event.src);
});
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Send text message to other clients
await client.sendText([CLIENT_ADDRESS], jsonEncode({'contentType': 'text', 'content': 'Hello'}));
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publish a message to a specified topic (see wallet section for subscribing to topics):
await client.publishText(TOPIC, jsonEncode({'contentType': 'text', 'content': 'Hello'}));
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Pub/Sub
var res = await client.subscribe(topic: TOPIC);
var res = await client.unsubscribe(topic: TOPIC);
var res = await client.getSubscribersCount(topic: TOPIC);
var res = await client.getSubscription(topic: TOPIC, subscriber: CLIENT_ADDRESS);
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