Crypto Wallet Integration

Macro Browser provides seamless integration with cryptocurrency wallets, enabling direct interaction with Web3 applications and blockchain networks.

Crypto Wallet Integration

Overview

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Rather than building yet another crypto wallet that users need to manage, Macro Browser focuses on providing a smooth interface with existing wallets. This approach gives users flexibility while maintaining security.

Connection Methods

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1. External Wallet Connection

Connect popular external wallets directly to Macro Browser:

• MetaMask: Industry-standard Ethereum wallet

• Coinbase Wallet: User-friendly option with wide adoption

• WalletConnect: Connect to mobile wallets via QR code

• Ledger/Trezor: Hardware wallet support for enhanced security

• Other EIP-1193 Compatible Wallets: Support for standard Ethereum wallet interfaces

2. Built-in Lightweight Wallet

For users who prefer an all-in-one solution, Macro Browser includes a built-in lightweight wallet:

• Basic functionality: Send, receive, and store tokens

• Local secure storage: Private keys encrypted on your device

• Seed phrase backup: Standard recovery options

• Multiple network support: Connect to various Ethereum-compatible networks

Web3 Capabilities

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dApp Interaction

Macro Browser provides native support for decentralized applications:

• Provider API: Standard Web3 provider for dApp connectivity

• Transaction Signing: Secure signing of blockchain transactions

• Message Signing: Support for message signing (EIP-712, personal_sign)

• Chain Switching: Easy network switching for multi-chain dApps

Network Support

Connect to multiple blockchain networks:

• Ethereum Mainnet: Primary Ethereum network

• Layer 2 Networks: Optimism, Arbitrum, zkSync, etc.

• Sidechains: Polygon, Gnosis Chain, etc.

• Alternative EVM Chains: Binance Smart Chain, Avalanche, etc.

• Testnets: Goerli, Sepolia, Mumbai, etc.

• Custom Networks: Add custom RPC endpoints

Security Features

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Transaction Protection

• Clear Approval UI: Transactions are presented in a clear, understandable format

• Gas Estimation: Accurate gas fee estimates before transaction approval

• Phishing Protection: Warnings for suspicious contracts or websites

• Spending Limits: Optional limits on transaction amounts

• Contract Verification: Verification of contract source code when available

Privacy Enhancements

• Connection Isolation: dApp connections are isolated by domain

• Privacy Mode: Control which accounts are exposed to websites

• Request Filtering: Filter unnecessary Web3 requests

• Chain ID Validation: Prevent cross-chain replay attacks

Key Management

• Secure Storage: Encrypted storage of sensitive wallet data

• Key Derivation: Industry-standard key derivation methods

• Memory Protection: Private key never exposed in plain text in memory

• Auto-locking: Session timeout for added security

User Interface

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Connection Management

Manage your wallet connections through a dedicated interface:

• Connection Status: See which wallets are currently connected

• Quick Connect/Disconnect: Toggle wallet connections with one click

• Chain Selector: Change networks directly from the toolbar

• Account Switcher: Switch between multiple accounts

Transaction Dashboard

Monitor your transaction activity:

• Pending Transactions: View currently pending transactions

• Transaction History: See recent transaction activity (in-memory only)

• Receipt Verification: Verify transaction completion

• Gas Analytics: Monitor gas costs over time

Balance Overview

View your balances without leaving the browser:

• Token Balances: See all your token balances at a glance

• Token Details: View detailed information about each token

• Price Information: Current market values in your preferred currency

• Portfolio View: Overall portfolio valuation

Technical Implementation

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Macro Browser integrates with crypto wallets through standardized interfaces:

// Example of wallet provider integration
import { providers } from 'ethers';
import MetaMaskOnboarding from '@metamask/onboarding';

// Create a Web3 provider
const provider = new providers.Web3Provider(window.ethereum);

// Request account access
async function connectWallet() {
  try {
    // Request account access if needed
    const accounts = await provider.send('eth_requestAccounts', []);
    return accounts[0];
  } catch (error) {
    // User denied account access
    console.error('User denied account access');

    // If MetaMask is not installed, start onboarding process
    if (!MetaMaskOnboarding.isMetaMaskInstalled()) {
      const onboarding = new MetaMaskOnboarding();
      onboarding.startOnboarding();
    }
    return null;
  }
}

// Sign a transaction
async function signTransaction(transaction) {
  const signer = provider.getSigner();
  return await signer.sendTransaction(transaction);
}

Development Resources

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For developers building Web3 applications that interact with Macro Browser:

• Standard Compliance: Macro Browser follows EIP-1193 and other relevant Ethereum standards

• Provider API: The window.ethereum object is available for dApp connectivity

• Chain Management: Support for EIP-3085 (wallet_addEthereumChain) and EIP-3326 (wallet_switchEthereumChain)

• Signature Standards: Support for various signing methods (eth_sign, personal_sign, eth_signTypedData)