LBTC GMP Mint Tracing

First, you need to get a transaction where LBTC minted or using Etherscan find MessageDelivered event.

Make sure the caller is the AssetRouter address.

Using nonce from event find related transaction on Ledger querying:

https://mainnet-rpc.lombard-fi.com/tx_search?query="ledger.gmp.MessageSent.nonce='\"77\"'"&prove=true

Find UTXOSpent event

Decode value of tx_id from Base64 to Hex.

Change the ordering of bytes.

The big endian result is txid. Vout from event is number of output.