flutter_paw_ffi 2.0.3

Low-level library for the PAW digital currency. Supports signatures, key generation, and more. Uses C functions for ed25519 and blake2b.

example/lib/main.dart

import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:flutter_paw_ffi/flutter_nano_ffi.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String address;

  @override
  void initState() {
    super.initState();
    // Generating a random seed
    String seed = NanoSeeds.generateSeed();
    // Getting private key at index-0 of this seed
    String privateKey = NanoKeys.seedToPrivate(seed, 0);
    // Getting public key from this private key
    String pubKey = NanoKeys.createPublicKey(privateKey);
    // Getting address (nano_, ban_) from this pubkey
    address = NanoAccounts.createAccount(NanoAccountType.NANO, pubKey);
    // Validating address
    NanoAccounts.isValid(NanoAccountType.NANO, address);

    // Creating a block
    int accountType = NanoAccountType.NANO;
    String account =
        'xrb_3igf8hd4sjshoibbbkeitmgkp1o6ug4xads43j6e4gqkj5xk5o83j8ja9php';
    String previous = '0';
    String representative =
        'xrb_3p1asma84n8k84joneka776q4egm5wwru3suho9wjsfyuem8j95b3c78nw8j';
    BigInt balance = BigInt.parse('1');
    String link =
        '1EF0AD02257987B48030CC8D38511D3B2511672F33AF115AD09E18A86A8355A8';
    String calculatedHash = NanoBlocks.computeStateHash(
        accountType, account, previous, representative, balance, link);
    // Signing a block
    NanoSignatures.signBlock(calculatedHash, privateKey);

    // Encrypting and decrypting a seed
    Uint8List encrypted = NanoCrypt.encrypt(seed, 'thisisastrongpassword');
    // String representation:
    String encryptedSeedHex = NanoHelpers.byteToHex(encrypted);
    // Decrypting (if incorrect password, will throw an exception)
    Uint8List decrypted = NanoCrypt.decrypt(
        NanoHelpers.hexToBytes(encryptedSeedHex), 'thisisastrongpassword');
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Flutter nano FFI'),
        ),
        body: Center(
          child: Text(address),
        ),
      ),
    );
  }
}