The Avalanche Bridge (AB) enables seamless transfer of ERC20 tokens between Ethereum and Avalanche's C-Chain. This comprehensive guide addresses all frequently asked questions about bridge functionality, security, fees, and troubleshooting.
Key Safety Information
👉 Always access the Avalanche Bridge through the official UI to prevent permanent fund loss. Critical warnings:
- Never send funds directly to bridge contract addresses - Use only the approved interface
- Avoid smart contract wallets - Current incompatibility may result in irreversible losses
- Verify all transactions - Cross-check your wallet balance if UI displays inconsistencies
Supported wallets include MetaMask (desktop only), Coinbase Wallet, and other standard Ethereum wallets.
User Preparation Checklist
- Desktop Setup Recommended: Mobile MetaMask has known bridge transaction bugs
- AVAX for Fees: Maintain sufficient Avalanche native token for transaction costs
- Token Visibility: Add wrapped tokens (.e suffix) manually to your wallet
- Minimum Transfer: $75+ transfers qualify for AVAX airdrop (0.1 AVAX max)
Bridge Transaction Process
Transfer Timeline
| Network | Approx. Processing Time |
|---|---|
| Ethereum | 10-15 minutes |
| Avalanche | Seconds |
Troubleshooting Stuck Transactions
- Ethereum Tx: Speed up via MetaMask if <35 confirmations
- Avalanche Tx: Check wallet balance directly - may be UI delay
- Gas Issues: Wait for lower gas prices if fees exceed transfer value
Supported Assets
- ERC20 tokens only (appear as [TOKEN].e on Avalanche)
- Wrapped variants of ETH/BTC (WETH, WBTC)
- No native ETH/BTC or NFT transfers currently
👉 For real-time gas estimates and token prices, the bridge uses Chainlink oracles with padded GWEI for reliable inclusion.
Fee Structure
| Direction | Fee Basis | Example |
|---|---|---|
| Ethereum → Avalanche | Fixed $3 equivalent | 0.0015 ETH for $3000 ETH |
| Avalanche → Ethereum | Variable gas + $15 buffer | $30 + $15 = $45 |
Note: Fees deducted in-kind from transferred tokens
Security Framework
The bridge implements trustless design through:
- 4-Party Warden System: Requires 3/4 approvals for transfers
- Intel SGX Enclaves: Secure key management
- Halborn-Audited Code: Verified security protocols
Frequently Asked Questions
Why don't I see my bridged tokens?
- Add the token contract manually in MetaMask
- Check Proof of Assets for correct .e token
Can I send to different addresses?
No - Bridge only supports same-address transfers. Send separately after bridging.
How to convert old AEB tokens?
Use the conversion portal to exchange 1:1 for AB tokens
Where to trade bridged tokens?
Major Avalanche DEXs like Pangolin support .e token pairs
Ecosystem Integration
Projects can request listing:
Email [email protected] with:
- Project description
- Logo (.svg format)
- Relevant links
Promotional banners require specific dimensions:
- Desktop: 1155×440px
- Mobile: 720×337px
For technical documentation and contract addresses, visit the Avalanche Bridge GitHub.
👉 Start your secure cross-chain transfers today with Avalanche Bridge's optimized infrastructure and competitive fees.