Bridge-less Token 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 a 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.

Contract-to-Contract Call

• Specific message type proxies a call from one smart contract to another smart contract.

• The process works as a chain of calls. A smart contract call is relayed through a transaction to our router (a proxying smart contract that serves as an execution table of tables).

• The initial smart contract call is sent to the router. This router serves as an intermediary that ensures the call is directed to the correct destination.

• Our collator node picks up the transaction from the router. The collator then routes the transaction to the appropriate destination, ensuring the integrity and security of the call.

• The chain of calls is executed in a manner similar to how an ordinary smart contract would function. Each call in the chain is processed sequentially, ensuring that all conditions and parameters are met.