# `Stripe.Params.Billing.MeterCreateParams.CustomerMapping`
[🔗](https://github.com/jeffhuen/tiger_stripe/blob/main/lib/stripe/params/billing/meter_create_params.ex#L34)

Nested parameters.

# `t`

```elixir
@type t() :: %Stripe.Params.Billing.MeterCreateParams.CustomerMapping{
  event_payload_key: String.t() | nil,
  type: String.t() | nil
}
```

* `event_payload_key` - The key in the meter event payload to use for mapping the event to a customer. Max length: 100.
* `type` - The method for mapping a meter event to a customer. Must be `by_id`. Possible values: `by_id`.

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*Consult [api-reference.md](api-reference.md) for complete listing*