allanclempe / ether-wallet-flutter Goto Github PK

A ethereum digital wallet written in dart and flutter framework.

License: MIT License

Objective-C 0.05% Dart 93.07% Ruby 1.63% Kotlin 0.15% Swift 0.49% HTML 4.61%

ether-wallet-flutter's Introduction

Ethereum wallet using an ERC-20 smart contract.

A digital wallet app developed in dart and flutter. The idea is to help developers to understand how to build dApps using blockchain and associated technologies. This app can transfer tokens from one wallet to another through an ERC-20 Ethereum contract.

What's being used

Built in Flutter framework
QR code scanner to scan addresses
Web3Dart to interact with Ethereum blockchain
Flutter hooks to manage widget life-cycle.
Solidity smart contract

Wallet	Change network	Transfer tokens

Getting started

How to watch/build autogenerated files

$ flutter packages pub run build_runner build   # to build
$ flutter packages pub run build_runner watch   # to watch

How to run the app

$ flutter pub get packages
$ flutter packages pub run build_runner build
$ flutter run

running on the browser

$ flutter run -d web-server

How to run tests

$ flutter test

Wallet balance

For those who don't want to play with smart contracts yet, you can claim some test tokens by following links below, or check this repo to understand how to deploy your own contract.

Transfer test TOKENS to your wallet:

After setting up your wallet, you will need some tokens to play with. Use the link below to transfer some tokens to your wallet.

https://faucet.clempe.dev

Transfer test Ether to your wallet

To process transactions on the network, you will also need coins to pay the transaction fees (gas). Use one of the following links to claim some coins depending on the network you are working on:

Goerli: https://goerlifaucet.com/
Polygon (old MATIC): https://faucet.polygon.technology/
BSC: https://testnet.binance.org/faucet-smart

The smart contract

Link for the smart contract used for this project https://github.com/allanclempe/ether-wallet-contract

Buy me a coffee

If you enjoy my work, a small donation would be greatly appreciated.

BTC	ETH

bc1qkvjec6dhr94jvlvqqjpuv7n3vz8j0h89nle6n3	0xE4B2ca20D15109b0a2Eef933678C496A1a798173

License

dart wallet cryto flutter eth smart contracts - by Allan Clempe

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ether-wallet-flutter's Issues

is it possible to create wallet avalanche avax test network ??

Hi, first of all I m really thankful that you shared this valuable work with us.
I m looking for some documents, works etc that I can create a wallet in avalanche test net, until now I could not find anything.
My purpose is make app single point of contact that users interact contracts without needing any other solutions.

if any Idea you can share, I will be so greatfull. Regards.

Invalid JSON RPC response

https://faucet.clempe.dev/ show below error when I want to transfer token

Invalid JSON RPC response: "<html>\r\n<head><title>504 Gateway Time-out</title></head>\r\n<body>\r\n<center><h1>504 
Gateway Time-out</h1></center>\r\n</body>\r\n</html>\r\n"

How can this problem be solved?

Transfer Money using Ethereum (Ropsten) Does not Work

Hey Clempe, it seems the transfer money using Ropsten does not work. is there a bug in the latest commit?

BIP39 gives different private key

Hello,

can you please explain below:

I create a new 12-word phrase from the app
I debug in order to get the private key
I use the exact 12 words in https://iancoleman.io/bip39/
I see that the entropy and BIP39 seed are exactly the same as the ones being created in the app
BUT... the private key generated by the above website is not the same as the one generated in the app, hence leading to a different address!

Specifically

@override
  String getPrivateKey(String mnemonic) { <-- entropy is also OK!
    String seed = bip39.mnemonicToSeedHex(mnemonic); <--OK!
    KeyData master = ED25519_HD_KEY.getMasterKeyFromSeed(seed); <-- I don't know about this
    final privateKey = HEX.encode(master.key); <--WRONG!
    print("private: $privateKey");
    return privateKey;
  }

So, why do we have this difference?
Is the address that is generated through the app the 1st address available (path m/44'/0'/0'/0/0) or is it sth else?

Thanks,
Zois

Different address generated than official wallets

Why addresses generated from mnemonic seeds from this example is different from official wallets like Coinbase Wallet?

listenTransfer is not working

Initially many many congrats on your work!
My issue is that in listenTransfer the events StreamSubscription gets bad, because of
Unhandled exception: bad state: stream has already been listened to
So although the transaction is completed ok, because I check it on etherscan, the app gets stuck in the processing loading indicator.
Any ideas?

Thanks!

RPCError : got code -32000 with msg

Hey there ,
Getting this error for transfering. I have test eth.

Allows users to add as many tokens as they want

It is suggested to add a token that allows users to add whatever tokens they want.

web support?

Flutter web support?

It works well

Hi,
Just want to thank you for your work. The framework you created is awesome to work on. The code works well and I am integrating it into my app as a way to pay tokens(ERC20) over ethereum blockchain, of course with some tweaks.

how we can get public key of an ethereum account? is there any way to do that?

How to configure Firebase

Got this:

6.13.0 - [Firebase/Core][I-COR000004] App with name __FIRAPP_DEFAULT does not exist.
6.13.0 - [Firebase/Core][I-COR000012] Could not locate configuration file: 'GoogleService-Info.plist'.

No License Specified

Great codebase, but with No License specified, it won't be possible to use or contribute to the project.

Adding a simple ETH transaction

I am playing around with the web3dart lib, and what I 'd like to do is add a simple ETH transfer, without contract. I saw the way to do it here
https://github.com/simolus3/web3dart/blob/master/example/simple_transaction.dart
but I was wondering how we can actually use the way you are using in the contract related one, so as to have a loading page and listen to the transaction.
Can we actually do that? Because for the contract one, we emit an event Transfer so we listen to that. Do you know if Ethereum itself has a similar event so we can listen to and update the UI accordingly?
Any ideas?

Thanks again!

Realtime balance update

Hi,
Good job and amazing work with the project.

I want to know is there a way we can update the wallet balance without refreshing the page in realtime?

Websocket Error

Hey! Awesome app! I am however getting an error which says Unhandled Exception: WebSocketChannelException: WebSocketChannelException: WebSocketException: Connection to 'https://ropsten.infura.io:0/ws#' was not upgraded to websocket. Is there a quick fix for this? Also where do I get the ERC20 token which this app supports?