{
  "payment_type": "client_expense_funding",
  "ledger_entry_type": "client_expense_funding_apply",
  "authorization": "Determine the permitted receiving account and confirm the client's expense authorization before collecting funds.",
  "amounts": "Positive integer strings in USD cents, resolved server-side from approved records.",
  "identity": "Authenticate the payer and resolve the Ledger and business record server-side.",
  "idempotency": "Persist one stable key and exact payload per operation. Recover existing operations after timeouts.",
  "concurrency": "Serialize application approvals per record; the apply entry condition prevents a negative available balance.",
  "settlement": "Verify Payment status on the server. Never post native settlement entries manually.",
  "domain_rules": {
    "Account classification": "The firm determines whether funds belong in an operating or trust account before using this flow.",
    "Matter separation": "Keep each collection bound to its authorized matter and expense record.",
    "Expert scope changes": "Approve revised expert work before allocating additional client funding."
  }
}