Creating and linking LAS and PO

1. Create a pending Ledger Account Settlement through the Create Ledger Account Settlement API. The settlement object is in processing status initially;
2. Once the Ledger Account Settlement is processed successfully, Modern Treasury sends a ledger_account_settlement.finished_processing webhook, which contains status, amount, direction, ledger_transaction_id among other fields;
3. Create a Payment Order through the Create Payment Order API and set the ledger_transaction_id parameter to the LAS's ledger_transaction_id. The LAS and the PO are now linked together through a common Ledger Transaction.

Status updates

When the Payment Order is completed: Modern Treasury updates the Ledger Account Settlement and the Ledger Transaction to posted and sends ledger_account_settlement.posted and ledger_transaction.posted webhooks.

When the Payment Order is canceled, denied, or failed: The Ledger Account Settlement stays in pending. You could either fix and redraft the Payment Order, or explicitly archive the Ledger Account Settlement so that the Ledger Entries are available for future Settlements to pick up. Note that once a Ledger Account Settlement is archived, it cannot be restored.

When the Payment Order is returned or reversed: The Ledger Account Settlement is updated to pending, and it's ledger_transaction is updated to the latest pending ledger_transaction given that Ledger Transactions are immutable once posted.

Look up an LAS's linked PO

A Ledger Account Settlement and a Payment Order are linked together through their common Ledger Transaction. In order to look up the linked PO from an LAS, you would:

1. Get the ledger_transaction_id of the Ledger Account Settlement;
2. Retrieve the Ledger Transaction by calling the Get Ledger Transaction API with its ID. The Ledger Transaction's ledgerable_type is payment_order, the ledgerable_id is the Payment Order ID.

Look up a PO's linked LAS

A Ledger Account Settlement and a Payment Order are linked together through their common Ledger Transaction. In order to look up the linked LAS from a PO, you would:

1. Get the ledger_transaction_id of the Payment Order;
2. Query the Ledger Account Settlements by passing in the ledger_transaction_id parameter. There should only be one LAS returned.