LBTC GMP Mint Tracing

Step-by-step guide for tracing LBTC minting transactions through multiple blockchain systems.

Step 1: Identify MessageDelivered Event

Locate an LBTC minting transaction on Etherscan. Find the MessageDelivered event and confirm that the caller is the AssetRouter address.

Step 2: Query the Ledger

Use the nonce value from the event to search the Ledger blockchain:

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

Replace 77 with your actual nonce value.

Step 3: Find UTXOSpent Event

Locate the UTXOSpent event in the Ledger transaction results.

Step 4: Decode the Transaction ID

1. Take the tx_id value from the UTXOSpent event
2. Convert from Base64 to hexadecimal format
3. Reverse the byte ordering (little-endian to big-endian conversion)
4. The resulting big-endian value is your Bitcoin transaction ID (txid)

Step 5: Get the Output Reference

The vout number from the UTXOSpent event identifies the specific output in the Bitcoin transaction.