As the Ethereum ecosystem expands, custom networks and sidechains—blockchains compatible with Ethereum—have become popular for building new technologies. These networks allow users to transfer tokens or value between chains seamlessly. MetaMask plays a pivotal role in facilitating these cross-network interactions. However, navigating sidechains comes with risks. This guide outlines best practices to avoid common pitfalls when using EVM-compatible chains.
Best Practices
1. Conduct Due Diligence
- Not all networks are safe. Custom networks often prioritize speed and cost over security. Research risks before transferring significant value.
- Trust the network provider. Malicious providers can manipulate blockchain data, censor transactions, or log your activity.
2. Verify Custom Network Information
- Use ChainID Network to add networks automatically. Alternatively, follow MetaMask’s manual setup guide.
- Cross-check network details. Refer to our verification guide to ensure legitimacy.
3. Use Trusted Bridges for Cross-Network Transfers
- MetaMask cannot track inter-network transactions. Understand how bridges operate and only use established portals.
- 👉 Explore secure bridging options for asset transfers.
4. Never Send Tokens Directly Between Networks
- Direct transfers cause irreversible loss. Custom networks are distinct from Ethereum Mainnet—assets exist per-chain unless bridged.
- Always use bridges. Learn more in our bridge field guide.
5. Recognize Technical Support Limits
- MetaMask supports third-party dapps but doesn’t troubleshoot their protocols. Seek help from the dapp’s community (e.g., Discord, forums).
- Protocols like decentralized exchanges may lack centralized support. Proceed with caution.
6. Understand Network-Specific Gas Fees
- Fees are paid in the native token of the network (e.g., BNB for Binance, POL for Polygon).
- Ensure sufficient native tokens for transactions.
FAQs
How do I switch networks in MetaMask?
MetaMask’s v12.0 update auto-switches networks when connected to multiple dapps (Extension only).
Can I bridge assets to Arbitrum using MetaMask?
Yes! Follow our Arbitrum bridging guide.
What tokens are needed for gas on Polygon?
Polygon uses POL (formerly MATIC). Always hold enough for transactions.
Does MetaMask support Polkadot?
No, MetaMask is EVM-compatible and doesn’t support Polkadot’s non-EVM chain.
Troubleshooting
Need help? 👉 Visit our troubleshooting hub for common issues.
Keywords:
- Custom networks
- Sidechains
- MetaMask
- EVM-compatible
- Gas fees
- Bridges
- Cross-chain transfers
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