new payment by id method + shell scripts update + mntx removed

interface/api.yaml

@@ -93,6 +93,8 @@ paths:
     $ref: ./api/payments/by_quote.yaml
   /payments/by-multiquote/{organizations_ref}:
     $ref: ./api/payments/by_multiquote.yaml
+  /payments/object/{payments_ref}:
+    $ref: ./api/payments/object.yaml
   /payments/{organizations_ref}:
     $ref: ./api/payments/list.yaml
   /payments/documents/operation/{organizations_ref}:

interface/api/parameters/payments_ref.yaml

@@ -0,0 +1,10 @@
+components:
+  parameters:
+    PaymentsRef:
+      name: payments_ref
+      in: path
+      required: true
+      description: Stable payment reference.
+      schema:
+        type: string
+        minLength: 1

interface/api/payments/object.yaml

@@ -0,0 +1,31 @@
+get:
+  tags: [Payments]
+  summary: Get payment by reference
+  description: Returns a single payment by `payments_ref`.
+  operationId: paymentsGet
+  security:
+    - bearerAuth: []
+  parameters:
+    - $ref: ../parameters/payments_ref.yaml#/components/parameters/PaymentsRef
+  responses:
+    '200':
+      description: Payment data
+      content:
+        application/json:
+          schema:
+            allOf:
+              - $ref: ../response/response.yaml#/components/schemas/BaseResponse
+              - type: object
+                properties:
+                  data:
+                    $ref: ./response/payment.yaml#/components/schemas/PaymentData
+    '400':
+      $ref: ../response/operation.yaml#/components/responses/BadRequest
+    '401':
+      $ref: ../response/operation.yaml#/components/responses/Unauthorized
+    '403':
+      $ref: ../response/operation.yaml#/components/responses/Forbidden
+    '404':
+      $ref: ../response/operation.yaml#/components/responses/NotFound
+    '500':
+      $ref: ../response/operation.yaml#/components/responses/InternalServerError