dart_web3_bridge

A cross-chain interoperability wrapper for the Dart Web3 ecosystem. Effortlessly move assets between Layer 1s, Layer 2s, and sidechains using a standardized interface.

🚀 Features

• Multi-Bridge Support: Native integration for Stargate, Layerswap, Hop, and Celer.
• Status Monitoring: Real-time tracking of cross-chain status (Initiated, Pending, Completed).
• L2 Optimized: Low-latency route discovery for Ethereum rollups (Base, Arbitrum, Optimism).
• Security Scopes: Built-in verification of destination chain IDs and asset compatibility.

Usage Flow

sequenceDiagram
    participant U as User
    participant B as BridgeClient
    participant SC as Source Chain
    participant R as Relay/Messenger
    participant DC as Dest Chain
    U->>B: requestQuote(L1->L2)
    B-->>U: Quote (Fees + Time)
    U->>SC: send funds to Bridge
    SC->>R: emit event
    R->>DC: fulfill assets
    DC-->>U: Assets Received

🏗️ Architecture

graph LR
    Source[Source Chain] --> Bridge[Bridge Protocol]
    Bridge --> Messaging[Messaging Layer e.g. LayerZero]
    Messaging --> Dest[Destination Chain]
    
    subgraph Tracking [Relay Logic]
        SourceTx[Source Tx Hash]
        Status[Scanner Service]
    end

📚 Technical Reference

Core Classes

🛡️ Security Considerations

• Bridge Vulnerabilities: Bridge protocols are high-risk targets. Regularly update the SDK to ensure you are using the latest, patched versions of protocol adapters.
• Slippage on Dest: If the bridge performs an internal swap on the destination chain, ensure you set a cautious minReceived amount.
• Address Mistypes: Always double-check that the destination address is valid for the target network type (especially when bridging between EVM and Non-EVM).

💻 Usage

Initiating an L2 to L2 Transfer

import 'package:dart_web3_bridge/dart_web3_bridge.dart';

void main() async {
  final bridge = BridgeClient(providers: [HopProvider()]);

  final quote = await bridge.getQuote(
    fromChain: Chains.arbitrum,
    toChain: Chains.optimism,
    asset: 'ETH',
    amount: EthUnit.ether('0.5'),
  );

  print('Fee: ${quote.fee}');
  print('Est. Time: ${quote.estimatedMinutes} min');

  final txHash = await bridge.execute(quote, signer: mySigner);
}

📦 Installation

dependencies:
  dart_web3_bridge: ^0.1.0