# flutter_transaction

**Repository Path**: simplelove520/flutter_transaction

## Basic Information

- **Project Name**: flutter_transaction
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2026-02-12
- **Last Updated**: 2026-02-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 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

```dart
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:

```dart
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()

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

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

```