Cardano USDC Message Processor

[serejke]

Overview

Khalani protocol messages received from Khalani chain are authorized by the ISM minting policy residing on Cardano.
These messages carry Khalani protocol payload specific to user story (bridging tokens from other chains, exiting liquidity, etc) and should end up with USDC token minted on Cardano.

The current architecture of the Hyperlane x Cardano integration requires 2 transactions:

1. Hyperlane relayer's ISM authorized message is delivered to the "USDC DApp" recipient address as UTXO.
2. Off-chain component indexes the authorized messages and submits the final processing transaction.
   This task is to create that component — Cardano USDC Message Processor.

Task

Cardano USDC Message Processor indexes Khalani protocol messages, decodes the payload (Cardano USDC recipient, amount) and submits the USDC minting transaction according to the payload.

Anyone can be an operator of the Cardano USDC Message Processor, similar to how anyone can run a Hyperlane relayer.
The on-chain USDC minting policy contract should be designed accordingly.