Migrating from ERC20 tokens to native mainnet tokens is a common process for blockchain projects. Here's a detailed guide covering three primary implementation methods, key considerations, and best practices.
Understanding Token Migration
Most blockchain projects initially issue ERC20 tokens on Ethereum for fundraising before launching their mainnet. The migration process involves transferring these tokens to the native blockchain while maintaining security and preventing loss or duplication.
Key Migration Requirements
- Address Mapping: Establish secure ETH address → mainnet address relationships
- Balance Verification: Accurately record ERC20 token balances
- Token Distribution: Transfer equivalent mainnet tokens to verified addresses
- Token Destruction: Safely retire the original ERC20 tokens
Method 1: Address Mapping Smart Contracts
The most secure approach involves deploying a dedicated smart contract to collect address mappings.
Implementation Example: EOS Mapping Contract
👉 EOS Crowdsale Contract demonstrates this method with:
function register(string key) {
assert(today() <= numberOfDays + 1);
assert(bytes(key).length <= 64);
keys[msg.sender] = key;
LogRegister(msg.sender, key);
}Key features include:
- Private key verification prevents unauthorized mapping
- Time-limited registration window
- Public logging of all mappings
Method 2: Exchange-Assisted Migration (TRX Model)
Exchanges can simplify the process by handling technical details for users:
- Users deposit ERC20 tokens to designated exchange wallets
- Exchange automatically creates mainnet addresses
- Exchange distributes native tokens post-migration
Advantages:
- Minimal user technical knowledge required
- Reduced error potential
Disadvantages:
- Requires trust in exchange security
- Users must create exchange accounts
Method 3: Dedicated Wallet Solutions (Qtum Approach)
Specialized wallets provide integrated migration tools:
- Support both Ethereum and mainnet protocols
- Guide users through key generation
- Automatically handle contract interactions
👉 Qtum migration example shows this user-friendly alternative to exchange-based methods.
Token Destruction Mechanisms
After migration completion, projects must properly retire ERC20 tokens:
1. Pre-programmed Destruction (EOS Model)
function stop() auth note {
stopped = true;
}- One-time complete shutdown
- Requires forward planning
2. Manual Burn via Transfer
- Tokens sent to unrecoverable addresses
- Requires user participation
- Often done in batches
FAQ Section
Q: How long does token migration typically take?
A: Most projects allocate 30-90 days for migration, with some allowing late submissions through manual review.
Q: Can I migrate tokens without the original ETH private key?
A: No - private key ownership proves token ownership. Lost keys mean inaccessible funds.
Q: What happens if I send tokens to wrong addresses?
A: Recovery depends on project policies. Some offer manual review processes for provable errors.
Q: Are there tax implications for token migration?
A: Tax treatment varies by jurisdiction. Consult a tax professional regarding your specific situation.
Migration Best Practices
- Test with small amounts before full migration
- Verify all addresses multiple times
- Monitor official channels for deadline updates
- Keep migration records for future reference
The token migration process bridges temporary fundraising solutions with permanent blockchain infrastructure. By understanding these three primary methods, projects can implement secure, user-friendly transitions while maintaining asset integrity.