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Dart library to connect to Ethereum clients. Send transactions and interact with smart contracts!

apiHandler #

A dart library that connects to interact with the Ethereum blockchain. It connects to an Ethereum node to send transactions, interact with smart contracts and much more!

Features #

  • Connect to an Ethereum node with the rpc-api, call common methods
  • Send signed Ethereum transactions
  • Generate private keys, setup new Ethereum addresses
  • Call functions on smart contracts and listen for contract events

TODO #

  • Code generation based on smart contract ABI for easier interaction
  • Encode all supported solidity types, although only (u)fixed, which are not commonly used, are not supported at the moment.

Usage #

Credentials and Wallets #

In order to send transactions on the Ethereum network, some credentials are required. The library supports raw private keys and v3 wallet files.

Only support rinkeby testnet now #

import 'package:transaction/web3dart.dart';
// You can setup private keys first
web3dart.initEthClient(privateKey:'d1bdc683fbeb9fa0b4ceb26adb39eaffb21b16891ea28e4cf1bc3118fdd39295');

Sending transactions #

Of course, this library supports creating, signing and sending Ethereum transactions:

import 'package:web3dart/web3dart.dart';
/// send ETH Token Transaction
web3dart.sendETHFromMainnet(amount: EtherAmount.fromUnitAndValue(EtherUnit.finney, 1),toAddress:'0xA3B4dE5E90A18512BD82c1A640AC99b39ef2258A');

/// send ERC20 Token Transaction
/// if usdt Decimals is 18 than 1000000000000000000 = 1 amount  for example: BigInt.from(1000000000000000000)
web3dart.sendERC20FromMainnet(contractAddress: '0x7e0480ca9fd50eb7a3855cf53c347a1b4d6a2ff5',amount: BigInt.from(1000000000000000000),toAddress:'0xA3B4dE5E90A18512BD82c1A640AC99b39ef2258A');

get TopErc20CoinPrice() #

import 'package:transaction/model/coinPrice.dart';
import 'package:transaction/transaction.dart';
import 'dart:async';

/// getTopErc20CoinPrice
CoinPriceList coinPrice = await transaction.getTopErc20CoinPrice();
    print("result:$coinPrice");

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Dart library to connect to Ethereum clients. Send transactions and interact with smart contracts!

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License

MIT (LICENSE)

Dependencies

apihandler, flutter, http, web3dart

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