Bridge-less ERC cross-chain Transfers

In Kaon, we have designed a system that facilitates secure and efficient cross-chain transfers without the need for intermediary bridges. This process is managed by specialized listeners and a set of clearly defined steps.

The Listeners

• Monitoring: The listener continuously monitors incoming messages and transactions.

• Expected Parameters: It holds the expected parameters of incoming transactions from the Bitcoin Network or other chains.

• Lifespan and Gas: The listener has a defined gas amount that determines its lifespan, which can be refilled as necessary.

• Triggering: When triggered, the listener creates a new UTXO transaction in Kaon using parameters from both its creation and the incoming transaction, utilizing its stored gas as the transaction fee.

Locks and Vouchers

• Collator Mempool: The new EVM transaction is added to the EVM chain part’s mempool by the collator nodes.

• Triggering the Listener: The listener is triggered based on parameter recognition and verification.

• Token Lock Handling:

  • If the transaction involves a token lock (indicating liquidity entering the chain from outside), a voucher (NFT) is created to identify the exact lock.

• Token Unlock Handling:

  • If the transaction involves token unlocking, the corresponding voucher is detected and destroyed.

• Transaction Composition and Signing: The transaction is composed and signed using the Threshold Signature Scheme (TSS).

• ERC Token Exchange: The voucher is subsequently exchanged for the corresponding ERC tokens.

• Transaction Acceptance: The final step ensures the acceptance and validation of the transaction, completing the cross-chain transfer process.