* initial commit

flutter/.gitignore

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+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+../.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+.packages
+build/

flutter/.metadata

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+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 5464c5bac742001448fe4fc0597be939379f88ea
+  channel: stable
+
+project_type: package

flutter/CHANGELOG.md

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+## 0.0.1
+
+* TODO: Describe initial release.

flutter/analysis_options.yaml

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+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

flutter/example/example.dart

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+// Copyright (c), Magic Labs
+// All rights reserved. Use of this source code is governed by a
+// MIT license that can be found in the LICENSE file.
+
+import 'package:blockchain_signer/signer/remote/remote_signer.dart';
+import 'package:blockchain_signer/signer/response/signed_result.dart';
+
+///
+/// This is a simple example of using blockchain signer interface to sign
+/// given payloads. The payload will be sent to designated wallet provider for signature
+///
+Future<void> main() async {
+  TezosSigner signer = TezosSigner(provider);
+
+  await signer.init();
+
+  /// operation in hex
+  const operationInHex = 'a356d122';
+  /// watermark in bytes
+  const watermarkInBytes = Uint8List.fromList(crypto.hexDecode('03'));
+  SignedResult res = await signer.sign(operationInHex, watermarkInBytes);
+
+  /// This creates a signature object from taquito
+  /// https://github.com/ecadlabs/taquito/blob/e5c9dcc54b5a806dbe7c0d0a2e8232a8bcde2074/packages/taquito-signer/src/ec-key.ts#L62
+  print(res.sig);
+  print(res.sbytes);
+  print(res.bytes);
+  print(res.prefixSig);
+}
+
+///
+/// This is a simple example of using blockchain signer interface to build
+/// Tezos remote signer module on the wallet provider side
+///
+class TezosSigner extends BlockchainModule implements RemoteSigner {
+  TezosSigner(RpcProvider provider)
+      : super(provider);
+
+  late String _pk;
+  late String _pkh;
+
+  static TezosSigner? instance;
+
+  @override
+  String get address => _pkh;
+
+  @override
+  String get publicKey => _pk;
+
+
+  @override
+  String get secretKey =>
+      throw UnsupportedError('Secret key is not available');
+
+  /// sends unsigned payload to the Signer and wait for it to be signed
+  ///
+  /// @param [op] Operation to sign
+  /// @param [magicByte] Magic bytes 1 for block, 2 for endorsement, 3 for generic, 5 for the PACK format of michelson
+  Future<void> init() async {
+    await response = sendToProvider(method: TezosMethod.taquito_getPublicKeyAndHash, params: []);
+    _pk = response.result.pk;
+    _pkh = response.result.pkh;
+  }
+  @override
+  Future<SignedResult> sign(String op, Uint8List magicByte) async {
+    final params = {"bytes": op, "watermark": magicByte};
+
+    await response = sendToProvider(method: TezosMethod.taquito_sign, params: [params]);
+    return response;
+  }
+}
+

flutter/lib/blockchain_signer.dart

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+library blockchain_signer;
+
+export 'signer/remote/remote_signer.dart';

flutter/lib/signer/remote/remote_signer.dart

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+import 'dart:typed_data';
+import 'package:blockchain_signer/signer/signer.dart';
+import '../response/signed_result.dart';
+
+/// Remote Sign
+/// A remote signer layer that provides signature service from non-custodial key management solutions
+abstract class RemoteSigner extends Signer {
+  @override
+  Future<SignedResult> sign(String op, Uint8List bytes);
+
+  @override
+  String? get publicKey;
+
+  @override
+  String? get address;
+
+  @override
+  String? get secretKey;
+
+  // <Bool>verifySignature
+}

flutter/lib/signer/response/signed_result.dart

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+import 'package:json_annotation/json_annotation.dart';
+
+part 'signed_result.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class SignedResult {
+  // https://github.com/ecadlabs/taquito/blob/e5c9dcc54b5a806dbe7c0d0a2e8232a8bcde2074/packages/taquito-utils/src/taquito-utils.ts#L56
+  // signature is hex 64
+
+  /// b58c encoded signature from bytes hash
+  String sig; // b58cencode(signature, prefix.sig),
+  String prefixSig; // b58cencode(signature, pref[this.curve].sig),
+  String bytes; // Original bytes
+  String sbytes; // bytes + hex signature
+
+  SignedResult(
+      {required this.bytes,
+      required this.sig,
+      required this.prefixSig,
+      required this.sbytes});
+
+  factory SignedResult.fromJson(Map<String, dynamic> json) =>
+      _$SignedResultFromJson(json);
+
+  Map<String, dynamic> toJson() => _$SignedResultToJson(this);
+}

flutter/lib/signer/signer.dart

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+import 'dart:typed_data';
+import 'package:blockchain_signer/signer/response/signed_result.dart';
+
+/// Basic Signer that provides developers with signing interfaces for any blockchain.
+/// This is not yet the final version yet. Anything would be subjected to change
+///
+abstract class Signer {
+  Future<SignedResult> sign(String op, Uint8List bytes);
+
+  String? get publicKey;
+  String? get address;
+  String? get secretKey;
+
+// <Bool>verifySignature
+}

flutter/prepublish.sh

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+#!/bin/bash
+
+prepublishCheck (){
+
+  echo "=== Formatting source package $1 ==="
+  flutter format "$1"
+  tempFolderPath="./$1_copy/"
+
+  echo
+  echo "=== Start prepublish check $1 ==="
+
+  cp -r "./$1" "$tempFolderPath"
+  dart pub global run pana "$tempFolderPath"
+  rm -r "$tempFolderPath"
+
+  echo
+  echo "=== Prepublish Check for $1 is completed! === "
+  echo
+}
+
+prepublishCheck "lib"

flutter/pubspec.yaml

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+name: blockchain_signer
+description: A flutter universal blockchain signer protocol for third-party library to enable Remote signing and third part wallet provider
+version: 0.1.0
+homepage: https://github.com/magiclabs/blockchain-mobile-signer
+repository: https://github.com/magiclabs/blockchain-mobile-signer
+
+environment:
+  sdk: ">=2.16.2 <3.0.0"
+  flutter: ">=1.17.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  json_annotation: ^4.5.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^1.0.0
+  build_runner: ^2.1.11
+  json_serializable: ^6.2.0
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter.
+flutter:
+
+  # To add assets to your package, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+  #
+  # For details regarding assets in packages, see
+  # https://flutter.dev/assets-and-images/#from-packages
+  #
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware.
+
+  # To add custom fonts to your package, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts in packages, see
+  # https://flutter.dev/custom-fonts/#from-packages

flutter/test/blockchain_signer_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:blockchain_signer/blockchain_signer.dart';
+
+void main() {
+}