Web3 Integration

Overview

Viction is fully compatible with Ethereum’s Web3 ecosystem. You can use popular Web3 libraries like Web3.js, ethers.js, and Web3.py to interact with the Viction blockchain.

Network Configuration

Mainnet

const VICTION_MAINNET = {
  chainId: 88,
  chainName: 'Viction',
  rpcUrls: ['https://rpc.viction.xyz'],
  nativeCurrency: {
    name: 'Viction',
    symbol: 'VIC',
    decimals: 18
  },
  blockExplorerUrls: ['https://vicscan.xyz']
};

Testnet

const VICTION_TESTNET = {
  chainId: 89,
  chainName: 'Viction Testnet',
  rpcUrls: ['https://rpc-testnet.viction.xyz'],
  nativeCurrency: {
    name: 'Viction',
    symbol: 'VIC',
    decimals: 18
  },
  blockExplorerUrls: ['https://testnet.vicscan.xyz']
};

Web3.js Integration

Installation

npm install web3

Basic Setup

const Web3 = require('web3');

// HTTP Provider
const web3 = new Web3('https://rpc.viction.xyz');

// WebSocket Provider (for subscriptions)
const web3ws = new Web3('wss://ws.viction.xyz');

// Local node
const web3local = new Web3('http://localhost:8545');

Common Operations

Get Account Balance

async function getBalance(address) {
  const balance = await web3.eth.getBalance(address);
  console.log('Balance:', web3.utils.fromWei(balance, 'ether'), 'VIC');
}

getBalance('0x...');

Send Transaction

async function sendTransaction() {
  const account = web3.eth.accounts.privateKeyToAccount('0x...');
  web3.eth.accounts.wallet.add(account);
  
  const tx = {
    from: account.address,
    to: '0x...',
    value: web3.utils.toWei('1', 'ether'),
    gas: 21000,
    gasPrice: await web3.eth.getGasPrice()
  };
  
  const receipt = await web3.eth.sendTransaction(tx);
  console.log('Transaction hash:', receipt.transactionHash);
}

Interact with Smart Contract

const contractABI = [...];
const contractAddress = '0x...';

const contract = new web3.eth.Contract(contractABI, contractAddress);

// Read contract data
async function readContract() {
  const result = await contract.methods.getValue().call();
  console.log('Value:', result);
}

// Write to contract
async function writeContract() {
  const account = web3.eth.accounts.privateKeyToAccount('0x...');
  web3.eth.accounts.wallet.add(account);
  
  const tx = contract.methods.setValue(123);
  const gas = await tx.estimateGas({ from: account.address });
  
  const receipt = await tx.send({
    from: account.address,
    gas: gas
  });
  
  console.log('Transaction:', receipt.transactionHash);
}

// Subscribe to new blocks
web3ws.eth.subscribe('newBlockHeaders', (error, blockHeader) => {
  if (!error) {
    console.log('New block #', blockHeader.number);
  }
});

// Subscribe to contract events
const subscription = contract.events.Transfer({
  filter: { from: '0x...' },
  fromBlock: 'latest'
}, (error, event) => {
  if (!error) {
    console.log('Transfer event:', event.returnValues);
  }
});

Ethers.js Integration

Installation

npm install ethers

Basic Setup

const { ethers } = require('ethers');

// Connect to Viction
const provider = new ethers.JsonRpcProvider('https://rpc.viction.xyz');

// WebSocket provider
const wsProvider = new ethers.WebSocketProvider('wss://ws.viction.xyz');

// With custom network
const customProvider = new ethers.JsonRpcProvider('https://rpc.viction.xyz', {
  chainId: 88,
  name: 'viction'
});

Common Operations

Get Account Balance

async function getBalance(address) {
  const balance = await provider.getBalance(address);
  console.log('Balance:', ethers.formatEther(balance), 'VIC');
}

Create Wallet and Send Transaction

async function sendTransaction() {
  const wallet = new ethers.Wallet('0x...', provider);
  
  const tx = {
    to: '0x...',
    value: ethers.parseEther('1.0')
  };
  
  const transaction = await wallet.sendTransaction(tx);
  console.log('Transaction hash:', transaction.hash);
  
  const receipt = await transaction.wait();
  console.log('Confirmed in block:', receipt.blockNumber);
}

Interact with Smart Contract

const contractABI = [...];
const contractAddress = '0x...';

const contract = new ethers.Contract(contractAddress, contractABI, provider);

// Read contract
async function readContract() {
  const value = await contract.getValue();
  console.log('Value:', value.toString());
}

// Write to contract
async function writeContract() {
  const wallet = new ethers.Wallet('0x...', provider);
  const contractWithSigner = contract.connect(wallet);
  
  const tx = await contractWithSigner.setValue(123);
  await tx.wait();
  console.log('Transaction confirmed:', tx.hash);
}

Listen to Events

// Listen to contract events
contract.on('Transfer', (from, to, amount, event) => {
  console.log(`Transfer: ${from} -> ${to}, Amount: ${amount.toString()}`);
});

// Listen to new blocks
provider.on('block', (blockNumber) => {
  console.log('New block:', blockNumber);
});

Go Client Integration

Using ethclient Package

import (
    "context"
    "fmt"
    "math/big"
    
    "github.com/tomochain/tomochain/ethclient"
    "github.com/tomochain/tomochain/common"
)

func main() {
    // Connect to Viction node
    client, err := ethclient.Dial("https://rpc.viction.xyz")
    if err != nil {
        panic(err)
    }
    
    // Get latest block number
    blockNumber, err := client.BlockNumber(context.Background())
    if err != nil {
        panic(err)
    }
    fmt.Println("Latest block:", blockNumber)
    
    // Get balance
    address := common.HexToAddress("0x...")
    balance, err := client.BalanceAt(context.Background(), address, nil)
    if err != nil {
        panic(err)
    }
    fmt.Println("Balance:", balance)
}

Send Transaction

import (
    "github.com/tomochain/tomochain/core/types"
    "github.com/tomochain/tomochain/crypto"
)

func sendTransaction(client *ethclient.Client) error {
    privateKey, err := crypto.HexToECDSA("...")
    if err != nil {
        return err
    }
    
    fromAddress := crypto.PubkeyToAddress(privateKey.PublicKey)
    nonce, err := client.PendingNonceAt(context.Background(), fromAddress)
    if err != nil {
        return err
    }
    
    toAddress := common.HexToAddress("0x...")
    value := big.NewInt(1000000000000000000) // 1 VIC
    gasLimit := uint64(21000)
    gasPrice, err := client.SuggestGasPrice(context.Background())
    if err != nil {
        return err
    }
    
    tx := types.NewTransaction(nonce, toAddress, value, gasLimit, gasPrice, nil)
    
    chainID, err := client.NetworkID(context.Background())
    if err != nil {
        return err
    }
    
    signedTx, err := types.SignTx(tx, types.NewEIP155Signer(chainID), privateKey)
    if err != nil {
        return err
    }
    
    err = client.SendTransaction(context.Background(), signedTx)
    if err != nil {
        return err
    }
    
    fmt.Println("Transaction hash:", signedTx.Hash().Hex())
    return nil
}

Python Web3.py Integration

Installation

pip install web3

Basic Setup

from web3 import Web3

# Connect to Viction
w3 = Web3(Web3.HTTPProvider('https://rpc.viction.xyz'))

# Check connection
if w3.is_connected():
    print('Connected to Viction')
    print('Chain ID:', w3.eth.chain_id)

Common Operations

# Get balance
address = '0x...'
balance = w3.eth.get_balance(address)
print(f'Balance: {w3.from_wei(balance, "ether")} VIC')

# Send transaction
account = w3.eth.account.from_key('0x...')
tx = {
    'from': account.address,
    'to': '0x...',
    'value': w3.to_wei(1, 'ether'),
    'gas': 21000,
    'gasPrice': w3.eth.gas_price,
    'nonce': w3.eth.get_transaction_count(account.address),
    'chainId': 88
}

signed_tx = w3.eth.account.sign_transaction(tx, account.key)
tx_hash = w3.eth.send_raw_transaction(signed_tx.rawTransaction)
print(f'Transaction hash: {tx_hash.hex()}')

# Wait for receipt
receipt = w3.eth.wait_for_transaction_receipt(tx_hash)
print(f'Transaction confirmed in block {receipt.blockNumber}')

MetaMask Integration

Add Viction Network to MetaMask

async function addVictionNetwork() {
  try {
    await window.ethereum.request({
      method: 'wallet_addEthereumChain',
      params: [{
        chainId: '0x58', // 88 in hex
        chainName: 'Viction',
        nativeCurrency: {
          name: 'Viction',
          symbol: 'VIC',
          decimals: 18
        },
        rpcUrls: ['https://rpc.viction.xyz'],
        blockExplorerUrls: ['https://vicscan.xyz']
      }]
    });
  } catch (error) {
    console.error('Error adding network:', error);
  }
}

Connect Wallet

async function connectWallet() {
  if (typeof window.ethereum !== 'undefined') {
    const accounts = await window.ethereum.request({ 
      method: 'eth_requestAccounts' 
    });
    console.log('Connected account:', accounts[0]);
    return accounts[0];
  } else {
    alert('Please install MetaMask!');
  }
}

Send Transaction with MetaMask

async function sendTransactionWithMetaMask() {
  const accounts = await connectWallet();
  
  const transactionParameters = {
    from: accounts[0],
    to: '0x...',
    value: '0x' + (1e18).toString(16), // 1 VIC in wei
    gas: '0x5208', // 21000 in hex
  };
  
  try {
    const txHash = await window.ethereum.request({
      method: 'eth_sendTransaction',
      params: [transactionParameters],
    });
    console.log('Transaction hash:', txHash);
  } catch (error) {
    console.error('Transaction failed:', error);
  }
}

Best Practices

Error Handling

async function robustTransaction() {
  try {
    const tx = await web3.eth.sendTransaction({
      from: '0x...',
      to: '0x...',
      value: web3.utils.toWei('1', 'ether')
    });
    return tx;
  } catch (error) {
    if (error.code === 4001) {
      console.log('User rejected transaction');
    } else if (error.message.includes('insufficient funds')) {
      console.log('Insufficient balance');
    } else {
      console.error('Transaction error:', error);
    }
    throw error;
  }
}

Gas Estimation

async function estimateGas() {
  const tx = {
    from: '0x...',
    to: '0x...',
    value: web3.utils.toWei('1', 'ether')
  };
  
  const estimatedGas = await web3.eth.estimateGas(tx);
  const gasPrice = await web3.eth.getGasPrice();
  
  // Add 20% buffer
  const gasLimit = Math.floor(estimatedGas * 1.2);
  
  console.log('Estimated gas:', estimatedGas);
  console.log('Gas price:', web3.utils.fromWei(gasPrice, 'gwei'), 'Gwei');
  console.log('Recommended gas limit:', gasLimit);
}

Connection Management

class VictionConnection {
  constructor(rpcUrl) {
    this.web3 = new Web3(rpcUrl);
  }
  
  async ensureConnection() {
    try {
      await this.web3.eth.getBlockNumber();
      return true;
    } catch (error) {
      console.error('Connection failed:', error);
      return false;
    }
  }
  
  async reconnect(newRpcUrl) {
    this.web3.setProvider(new Web3.providers.HttpProvider(newRpcUrl));
    return this.ensureConnection();
  }
}

Development Tools

Hardhat Configuration

// hardhat.config.js
module.exports = {
  networks: {
    viction: {
      url: 'https://rpc.viction.xyz',
      chainId: 88,
      accounts: [process.env.PRIVATE_KEY]
    },
    victionTestnet: {
      url: 'https://rpc-testnet.viction.xyz',
      chainId: 89,
      accounts: [process.env.PRIVATE_KEY]
    }
  },
  solidity: '0.8.19'
};

Truffle Configuration

// truffle-config.js
module.exports = {
  networks: {
    viction: {
      provider: () => new HDWalletProvider(
        process.env.MNEMONIC,
        'https://rpc.viction.xyz'
      ),
      network_id: 88,
      gas: 8000000
    }
  },
  compilers: {
    solc: {
      version: '0.8.19'
    }
  }
};

​Overview

​Network Configuration

​Mainnet

​Testnet

​Web3.js Integration

​Installation

​Basic Setup

​Common Operations

​Get Account Balance

​Send Transaction

​Interact with Smart Contract

​Subscribe to Events

​Ethers.js Integration

​Installation

​Basic Setup

​Common Operations

​Get Account Balance

​Create Wallet and Send Transaction

​Interact with Smart Contract

​Listen to Events

​Go Client Integration

​Using ethclient Package

​Send Transaction

​Python Web3.py Integration

​Installation

​Basic Setup

​Common Operations

​MetaMask Integration

​Add Viction Network to MetaMask

​Connect Wallet

​Send Transaction with MetaMask

​Best Practices

​Error Handling

​Gas Estimation

​Connection Management

​Development Tools

​Hardhat Configuration

​Truffle Configuration

​Next Steps

Overview

Network Configuration

Mainnet

Testnet

Web3.js Integration

Installation

Basic Setup

Common Operations

Get Account Balance

Send Transaction

Interact with Smart Contract

Subscribe to Events

Ethers.js Integration

Installation

Basic Setup

Common Operations

Get Account Balance

Create Wallet and Send Transaction

Interact with Smart Contract

Listen to Events

Go Client Integration

Using ethclient Package

Send Transaction

Python Web3.py Integration

Installation

Basic Setup

Common Operations

MetaMask Integration

Add Viction Network to MetaMask

Connect Wallet

Send Transaction with MetaMask

Best Practices

Error Handling

Gas Estimation

Connection Management

Development Tools

Hardhat Configuration

Truffle Configuration

Next Steps