feat: Refund payment (#6610)

Essentially the same as #6601 but for refunds

packages/core-flows/src/payment/steps/index.ts

@@ -1 +1,3 @@
 export * from "./capture-payment"
+export * from "./refund-payment"
+

packages/core-flows/src/payment/steps/refund-payment.ts

@@ -0,0 +1,23 @@
+import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+import { IPaymentModuleService } from "@medusajs/types"
+import { StepResponse, createStep } from "@medusajs/workflows-sdk"
+
+type StepInput = {
+  payment_id: string
+  created_by?: string
+  amount?: number
+}
+
+export const refundPaymentStepId = "refund-payment-step"
+export const refundPaymentStep = createStep(
+  refundPaymentStepId,
+  async (input: StepInput, { container }) => {
+    const paymentModule = container.resolve<IPaymentModuleService>(
+      ModuleRegistrationName.PAYMENT
+    )
+
+    const payment = await paymentModule.refundPayment(input)
+
+    return new StepResponse(payment)
+  }
+)

packages/core-flows/src/payment/workflows/index.ts

@@ -1 +1,3 @@
 export * from "./capture-payment"
+export * from "./refund-payment"
+

packages/core-flows/src/payment/workflows/refund-payment.ts

@@ -0,0 +1,17 @@
+import { WorkflowData, createWorkflow } from "@medusajs/workflows-sdk"
+import { refundPaymentStep } from "../steps/refund-payment"
+
+export const refundPaymentWorkflowId = "refund-payment-workflow"
+export const refundPaymentWorkflow = createWorkflow(
+  refundPaymentWorkflowId,
+  (
+    input: WorkflowData<{
+      payment_id: string
+      created_by?: string
+      amount?: number
+    }>
+  ) => {
+    const payment = refundPaymentStep(input)
+    return payment
+  }
+)