Trust Wallet Technical Architecture

// EVM Network Configuration
const EVMNetworks = {
  ethereum: {
    chainId: 1,
    rpc: "https://ethereum.publicnode.com",
    explorer: "https://etherscan.io"
  },
  bsc: {
    chainId: 56,
    rpc: "https://bsc-dataseed.binance.org",
    explorer: "https://bscscan.com"
  },
  polygon: {
    chainId: 137,
    rpc: "https://polygon-rpc.com",
    explorer: "https://polygonscan.com"
  }
}

// Non-EVM Network Adapters
const NonEVMNetworks = {
  bitcoin: {
    addressType: "P2WPKH",
    curve: "secp256k1",
    derivation: "m/84'/0'/0'"
  },
  cosmos: {
    addressPrefix: "cosmos",
    curve: "secp256k1", 
    derivation: "m/44'/118'/0'/0"
  },
  solana: {
    curve: "ed25519",
    derivation: "m/44'/501'"
  }
}

// HD Wallet Implementation
class HDWallet {
  constructor(entropy) {
    // Generate seed from entropy
    this.seed = pbkdf2(entropy, 'mnemonic', 2048, 64, 'sha512');
    this.masterKey = hmacSha512('ed25519 seed', this.seed);
  }
  
  deriveKey(path) {
    // BIP-44 derivation: m/44'/coin_type'/account'/change/index
    return this.derivePath(path);
  }
  
  encrypt(privateKey, password) {
    // AES-256-GCM encryption
    const salt = crypto.randomBytes(32);
    const key = scrypt(password, salt, 32);
    const cipher = crypto.createCipher('aes-256-gcm', key);
    return cipher.update(privateKey) + cipher.final();
  }
}

// WalletConnect v2 Implementation
class WalletConnectHandler {
  async initializeSession(uri) {
    const session = await this.client.connect({
      uri,
      requiredNamespaces: {
        eip155: {
          methods: ['eth_sendTransaction', 'personal_sign'],
          chains: ['eip155:1', 'eip155:56'],
          events: ['accountsChanged', 'chainChanged']
        }
      }
    });
    return session;
  }
  
  async signTransaction(request) {
    // Validate request
    const validated = await this.validateRequest(request);
    
    // Show user confirmation UI
    const approved = await this.requestUserApproval(validated);
    
    if (approved) {
      return await this.wallet.signTransaction(request.params);
    }
    throw new Error('User rejected request');
  }
}