aniketambore/flutter-blockchain

Flutter and Blockchain DAPPS

flutter-blockchain's Issues

Asking for help in web3dart implementation

Hi there,

My name is Kartikey. I am an app developer studying in SRM Chennai 2nd year. Actually, from past couple of weeks, I was working on implementing blockchain in flutter and I came across your great article on medium about it but I am facing some errors in implementing web3dart in my project. I tried searching it on stack overflow , viewing all yt videos on it and talking to some people on linkedin about it but I found nothing to problems in my code

I checked your repositories and I found that I was using the same code but still getting problems in it. These are the following issues that I am facing

1. Whenever I call a smart contract that returns a value, it is showing me this error.
2. The second error is I am not able to receive any event logs that are emitted in the contract

I was wondering if you could help me resolve these issues.Thanks in advance

Unhandled Exception: RPCError: got code -32700

Get following error after submit the name.

E/flutter (18800): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: RPCError: got code -32700 with msg "Invalid signature v value".
E/flutter (18800): #0      JsonRPC.call (package:web3dart/json_rpc.dart:64:7)
E/flutter (18800): <asynchronous suspension>
E/flutter (18800): #1      Web3Client._makeRPCCall (package:web3dart/src/core/client.dart:53:20)
E/flutter (18800): <asynchronous suspension>
E/flutter (18800): #2      ContractLinking.setName (package:flutter_blockchain/contract_linking.dart:99:5)
E/flutter (18800): <asynchronous suspension>
E/flutter (18800): 

Stack trace

Error: Invalid signature v value
    at _ecdsaRecover (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:16048)
    at t.ecdsaRecover (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:16575)
    at t.computeFromAddress (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:16828)
    at t.computeIntrinsicsLegacyTx (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:17120)
    at LegacyTransaction.computeIntrinsics (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:206579)
    at new LegacyTransaction (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:203994)
    at Function.fromTxData (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:204701)
    at Function._fromData (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:207436)
    at Function.fromString (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:209622)
    at EthereumApi.eth_sendRawTransaction (/Applications/Ganache.app/Contents/Resources/static/node/node_modules/ganache/dist/node/1.js:2:88181)

Truffle v5.10.0 (core: 5.10.0)
Ganache v7.8.0
Solidity - 0.8.20 (solc-js)
Node v18.16.0
Web3.js v1.10.0

only loading screen appears

it was all working fine till " truffle migrate " and " truffle test " but after " flutter run " its building in my device but showing only hello world and a loading screen. Please help...
My code is same as
https://t.co/nXuWUhGfSx

Could contact you so,

I am student from vit pune. I really want an internship in blockchain. What should i do. I have learnt solidity. What projects should i build?

hello

cannot build

lib/components/wallet/balance.dart:29:48: Error: The getter 'body2' isn't defined for the class 'TextTheme'.

• 'TextTheme' is from 'package:flutter/src/material/text_theme.dart' ('/C:/flutter/packages/flutter/lib/src/material/text_theme.dart').
  Try correcting the name to the name of an existing getter, or defining a getter or field named 'body2'.
  style: Theme.of(context).textTheme.body2.apply(fontSizeDelta: 6),
  ^^^^^