paymentlib/payway/dto/transaction_refund_request.rs
use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Debug, Clone)]
#[serde(rename_all = "camelCase")]
pub struct TransactionRefundRequest {
pub single_use_token_id: Option<String>,
pub parent_transaction_id: i64,
pub transaction_type: String,
pub principal_amount: f64,
}