Add examples folder (leonardocustodio#363)

* Add examples folder

* remove test folder

.gitignore

@@ -25,7 +25,6 @@ coverage/
 .history
 .svn/
 coverage.lcov
-demo
 
 # IntelliJ related
 *.iml
@@ -59,4 +58,4 @@ lib/generated_plugin_registrant.dart
 # - https://fvm.app/docs/getting_started/configuration/
 # - https://seanconnolly.dev/flutter-version-management
 .fvm/flutter_sdk
-packages/demo
+packages/demo_old

examples/.gitignore

@@ -0,0 +1,4 @@
+# https://dart.dev/guides/libraries/private-files
+# Created by `dart pub`
+.dart_tool/
+lib/generated

examples/CHANGELOG.md

@@ -0,0 +1,3 @@
+## 1.0.0
+
+- Initial version.

examples/README.md

@@ -0,0 +1,17 @@
+Here you can find a example project running Polkadart in a Flutter app.
+
+First you need to generate the types to the network you want to work with.
+You can see in pubspec.yaml those lines:
+```
+polkadart:
+  output_dir: lib/generated
+  chains:
+    polkadot: wss://rpc.polkadot.io
+```
+
+Feel free to change to whatever network you want. After that you can generate the classes by running:
+`dart run polkadart_cli:generate -v`
+
+Finally to run this example you can do:
+`dart run bin/demo.dart`
+

examples/analysis_options.yaml

@@ -0,0 +1,30 @@
+# This file configures the static analysis results for your project (errors,
+# warnings, and lints).
+#
+# This enables the 'recommended' set of lints from `package:lints`.
+# This set helps identify many issues that may lead to problems when running
+# or consuming Dart code, and enforces writing Dart using a single, idiomatic
+# style and format.
+#
+# If you want a smaller set of lints you can change this to specify
+# 'package:lints/core.yaml'. These are just the most critical lints
+# (the recommended set includes the core lints).
+# The core lints are also what is used by pub.dev for scoring packages.
+
+include: package:lints/recommended.yaml
+
+# Uncomment the following section to specify additional rules.
+
+# linter:
+#   rules:
+#     - camel_case_types
+
+# analyzer:
+#   exclude:
+#     - path/to/excluded/files/**
+
+# For more information about the core and recommended set of lints, see
+# https://dart.dev/go/core-lints
+
+# For additional information about configuring this file, see
+# https://dart.dev/guides/language/analysis-options

examples/bin/demo.dart

@@ -0,0 +1,77 @@
+import 'package:convert/convert.dart';
+import '../lib/generated/polkadot/polkadot.dart';
+import '../lib/generated/polkadot/types/sp_runtime/multiaddress/multi_address.dart';
+import 'package:polkadart/polkadart.dart'
+    show AuthorApi, Extrinsic, Provider, SigningPayload, StateApi;
+import 'package:polkadart_keyring/polkadart_keyring.dart';
+
+Future<void> main(List<String> arguments) async {
+  final provider = Provider.fromUri(Uri.parse('wss://rpc.polkadot.io'));
+  final api = Polkadot(provider);
+
+  final stateApi = StateApi(provider);
+
+  final runtimeVersion = await stateApi.getRuntimeVersion();
+
+  final specVersion = runtimeVersion.specVersion;
+
+  final transactionVersion = runtimeVersion.transactionVersion;
+
+  final block = await provider.send('chain_getBlock', []);
+
+  final blockNumber = int.parse(block.result['block']['header']['number']);
+
+  final blockHash = (await provider.send('chain_getBlockHash', []))
+      .result
+      .replaceAll('0x', '');
+
+  final genesisHash = (await provider.send('chain_getBlockHash', [0]))
+      .result
+      .replaceAll('0x', '');
+
+  final keyring = await KeyPair.fromMnemonic(
+      "resource mirror lecture smooth midnight muffin position cup pepper fruit vanish also//0"); // This is a random key
+
+  final publicKey = hex.encode(keyring.publicKey.bytes);
+  print('Public Key: $publicKey');
+  final dest = $MultiAddress().id(hex.decode(publicKey));
+  final runtimeCall = api.tx.balances.transferAll(dest: dest, keepAlive: true);
+  final encodedCall = hex.encode(runtimeCall.encode());
+  print('Encoded call: $encodedCall');
+
+  final payloadToSign = SigningPayload(
+    method: encodedCall,
+    specVersion: specVersion,
+    transactionVersion: transactionVersion,
+    genesisHash: genesisHash,
+    blockHash: blockHash,
+    blockNumber: blockNumber,
+    eraPeriod: 64,
+    nonce: 0, // Supposing it is this wallet first transaction
+    tip: 0,
+  );
+
+  final payload = payloadToSign.encode(api.registry);
+  print('Payload: ${hex.encode(payload)}');
+
+  final signature = keyring.sign(payload);
+  final hexSignature = hex.encode(signature);
+  print('Signature: $hexSignature');
+
+  final extrinsic = Extrinsic(
+    signer: publicKey,
+    method: encodedCall,
+    signature: hexSignature,
+    eraPeriod: 64,
+    blockNumber: blockNumber,
+    nonce: 0,
+    tip: 0,
+  ).encode(api.registry);
+
+  final hexExtrinsic = hex.encode(extrinsic);
+  print('Extrinsic: $hexExtrinsic');
+
+  final author = AuthorApi(provider);
+  author.submitAndWatchExtrinsic(
+      extrinsic, (p0) => print("Extrinsic result: ${p0.type} - {${p0.value}}"));
+}

examples/pubspec.yaml

@@ -0,0 +1,27 @@
+name: polkadart_example
+description: A sample command-line application.
+version: 1.0.0
+publish_to: 'none'
+
+environment:
+  sdk: ^3.0.0
+
+# Add regular dependencies here.
+dependencies:
+  convert: ^3.1.1
+  polkadart: ^0.2.0
+  polkadart_cli: ^0.2.0
+  polkadart_keyring: ^0.2.0
+  polkadart_scale_codec: ^1.1.0
+  ss58: ^1.1.0
+  substrate_bip39: ^0.2.0
+  substrate_metadata: ^1.1.0
+
+dev_dependencies:
+  lints: ^2.0.0
+  test: ^1.21.0
+
+polkadart:
+  output_dir: lib/generated
+  chains:
+    polkadot: wss://rpc.polkadot.io