Manage book transfers

Trigger: A buyer and seller agree to transfer ownership of petroleum products within a shared storage facility or pipeline without physical movement.

1. Receive book transfer agreement details
2. Verify counterparty credit and contract terms
3. Confirm product availability at the specified facility
4. Adjust inventory ledgers to execute the ownership change
5. Issue book transfer confirmations to both parties
6. Reconcile updated balances with facility operator statements

Outcome: Inventory ledgers are updated to reflect the change in product ownership and transfer confirmations are pushed to accounting for settlement.