Persisted transaction posting (embedded schema).

Storage-layer counterpart of Beancount.Directives.Posting. Embedded inside Beancount.Schemas.Transaction via embeds_many/3; it has no table of its own and no file_order (ordering follows the enclosing transaction).

Fields

• account - account the posting affects, e.g. "Assets:Bank".
• amount - posting quantity as Decimal.t(), or nil for an elided leg.
• currency - commodity of amount, or nil when elided.
• cost - embedded Beancount.Schemas.CostSpec for lot cost, or nil.
• price - price annotation map (@/@@), or nil.
• flag - optional per-posting flag, e.g. "!".
• metadata - arbitrary key/value map.

Example

%Beancount.Schemas.Posting{
  account: "Assets:Stocks",
  amount: Decimal.new("10"),
  currency: "AAPL",
  cost: %Beancount.Schemas.CostSpec{per_amount: Decimal.new("150"), per_currency: "USD"},
  price: nil,
  flag: nil,
  metadata: %{}
}