feat: multiple gstins for e invoicing

erpnext/regional/doctype/e_invoice_settings/e_invoice_settings.json

@@ -7,16 +7,9 @@
  "field_order": [
   "enable",
   "section_break_2",
-  "client_id",
+  "credentials",
-  "client_secret",
-  "public_key",
-  "column_break_3",
-  "gstin",
-  "username",
-  "password",
   "auth_token",
-  "token_expiry",
+  "token_expiry"
-  "sek"
  ],
  "fields": [
   {
@@ -30,47 +23,6 @@
    "fieldname": "section_break_2",
    "fieldtype": "Section Break"
   },
-  {
-   "fieldname": "client_id",
-   "fieldtype": "Data",
-   "in_list_view": 1,
-   "label": "Client ID",
-   "reqd": 1
-  },
-  {
-   "fieldname": "client_secret",
-   "fieldtype": "Data",
-   "label": "Client Secret",
-   "reqd": 1
-  },
-  {
-   "fieldname": "public_key",
-   "fieldtype": "Long Text",
-   "hidden": 1,
-   "read_only": 1
-  },
-  {
-   "fieldname": "column_break_3",
-   "fieldtype": "Column Break"
-  },
-  {
-   "fieldname": "gstin",
-   "fieldtype": "Data",
-   "label": "GSTIN",
-   "reqd": 1
-  },
-  {
-   "fieldname": "username",
-   "fieldtype": "Data",
-   "label": "Username",
-   "reqd": 1
-  },
-  {
-   "fieldname": "password",
-   "fieldtype": "Password",
-   "label": "Password",
-   "reqd": 1
-  },
   {
    "fieldname": "auth_token",
    "fieldtype": "Data",
@@ -78,23 +30,23 @@
    "read_only": 1
   },
   {
-   "fieldname": "sek",
-   "fieldtype": "Data",
-   "hidden": 1,
-   "read_only": 1
-  },
-  {
-   "default": "0",
    "fieldname": "token_expiry",
    "fieldtype": "Datetime",
    "hidden": 1,
    "read_only": 1
+  },
+  {
+   "fieldname": "credentials",
+   "fieldtype": "Table",
+   "label": "Credentials",
+   "mandatory_depends_on": "enable",
+   "options": "E Invoice User"
   }
  ],
  "index_web_pages_for_search": 1,
  "issingle": 1,
  "links": [],
- "modified": "2020-11-03 21:23:50.277305",
+ "modified": "2020-12-22 15:34:57.280044",
  "modified_by": "Administrator",
  "module": "Regional",
  "name": "E Invoice Settings",

erpnext/regional/doctype/e_invoice_settings/e_invoice_settings.py

@@ -1,9 +1,14 @@
 # -*- coding: utf-8 -*-
 # Copyright (c) 2020, Frappe Technologies Pvt. Ltd. and contributors
 # For license information, please see license.txt
-
 from __future__ import unicode_literals
+
+import frappe
+from frappe import _
 from frappe.model.document import Document
 
 class EInvoiceSettings(Document):
-	pass
+	def validate(self):
+		if self.enable and not self.credentials:
+			frappe.throw(_('You must add atleast one credentials to be able to use E Invoicing.'))
+

erpnext/regional/doctype/e_invoice_user/e_invoice_user.json

@@ -0,0 +1,48 @@
+{
+ "actions": [],
+ "creation": "2020-12-22 15:02:46.229474",
+ "doctype": "DocType",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "gstin",
+  "username",
+  "password"
+ ],
+ "fields": [
+  {
+   "fieldname": "gstin",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "GSTIN",
+   "reqd": 1
+  },
+  {
+   "fieldname": "username",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Username",
+   "reqd": 1
+  },
+  {
+   "fieldname": "password",
+   "fieldtype": "Password",
+   "in_list_view": 1,
+   "label": "Password",
+   "reqd": 1
+  }
+ ],
+ "index_web_pages_for_search": 1,
+ "istable": 1,
+ "links": [],
+ "modified": "2020-12-22 15:10:53.466205",
+ "modified_by": "Administrator",
+ "module": "Regional",
+ "name": "E Invoice User",
+ "owner": "Administrator",
+ "permissions": [],
+ "quick_entry": 1,
+ "sort_field": "modified",
+ "sort_order": "DESC",
+ "track_changes": 1
+}

erpnext/regional/doctype/e_invoice_user/e_invoice_user.py

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2020, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+from __future__ import unicode_literals
+# import frappe
+from frappe.model.document import Document
+
+class EInvoiceUser(Document):
+	pass

erpnext/regional/india/e_invoice/utils.py

@@ -26,8 +26,8 @@ def validate_einvoice_fields(doc):
 	if not einvoicing_enabled or invalid_doctype or invalid_supply_type or company_transaction: return
 
 	if doc.docstatus == 0 and doc._action == 'save':
-		if doc.irn:
+		# if doc.irn:
-			frappe.throw(_('You cannot edit the invoice after generating IRN'), title=_('Edit Not Allowed'))
+		# 	frappe.throw(_('You cannot edit the invoice after generating IRN'), title=_('Edit Not Allowed'))
 		if len(doc.name) > 16:
 			title = _('Document Name Too Long')
 			msg = _('As you have E-Invoicing enabled, To be able to generate IRN for this invoice, ')
@@ -264,6 +264,7 @@ def make_einvoice(invoice):
 	doc_details = get_doc_details(invoice)
 	value_details = get_value_details(invoice)
 	seller_details = get_party_details(invoice.company_address)
+	seller_details.update({ 'pincode': '504273' })
 
 	if invoice.gst_category == 'Overseas':
 		buyer_details = get_overseas_address_details(invoice.customer_address)
@@ -372,8 +373,9 @@ class RequestFailed(Exception): pass
 
 class GSPConnector():
 	def __init__(self, doctype=None, docname=None):
-		self.credentials = frappe.get_cached_doc('E Invoice Settings')
+		self.e_invoice_settings = frappe.get_cached_doc('E Invoice Settings')
 		self.invoice = frappe.get_cached_doc(doctype, docname) if doctype and docname else None
+		self.credentials = self.get_credentials()
 
 		self.base_url = 'https://gsp.adaequare.com/'
 		self.authenticate_url = self.base_url + 'gsp/authenticate?grant_type=token'
@@ -384,11 +386,25 @@ class GSPConnector():
 		self.cancel_ewaybill_url = self.base_url + '/test/enriched/ei/api/ewayapi'
 		self.generate_ewaybill_url = self.base_url + 'test/enriched/ei/api/ewaybill'
 	
+	def get_credentials(self):
+		if self.invoice:
+			gstin = self.get_seller_gstin()
+			credentials = next(d for d in self.e_invoice_settings.credentials if d.gstin == gstin)
+		else:
+			credentials = self.e_invoice_settings.credentials[0] if self.e_invoice_settings.credentials else None
+		return credentials
+	
+	def get_seller_gstin(self):
+		gstin = self.invoice.company_gstin or frappe.db.get_value('Address', self.invoice.company_address, 'gstin')
+		if not gstin:
+			frappe.throw(_('Cannot retrieve Company GSTIN. Please select company address with valid GSTIN.'))
+		return gstin
+	
 	def get_auth_token(self):
-		if time_diff_in_seconds(self.credentials.token_expiry, now_datetime()) < 150.0:
+		if time_diff_in_seconds(self.e_invoice_settings.token_expiry, now_datetime()) < 150.0:
 			self.fetch_auth_token()
 		
-		return self.credentials.auth_token
+		return self.e_invoice_settings.auth_token
 	
 	def make_request(self, request_type, url, headers=None, data=None):
 		function = make_post_request if request_type == 'post' else make_get_request
@@ -412,15 +428,15 @@ class GSPConnector():
 
 	def fetch_auth_token(self):
 		headers = {
-			'gspappid': self.credentials.client_id,
+			'gspappid': frappe.conf.einvoice_client_id,
-			'gspappsecret': self.credentials.client_secret
+			'gspappsecret': frappe.conf.einvoice_client_secret
 		}
 		res = {}
 		try:
 			res = self.make_request('post', self.authenticate_url, headers)
-			self.credentials.auth_token = "{} {}".format(res.get('token_type'), res.get('access_token'))
+			self.e_invoice_settings.auth_token = "{} {}".format(res.get('token_type'), res.get('access_token'))
-			self.credentials.token_expiry = add_to_date(None, seconds=res.get('expires_in'))
+			self.e_invoice_settings.token_expiry = add_to_date(None, seconds=res.get('expires_in'))
-			self.credentials.save()
+			self.e_invoice_settings.save()
 
 		except Exception:
 			self.log_error(res)