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diff --git a/addons/payment_payumoney/models/__init__.py b/addons/payment_payumoney/models/__init__.py
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+++ b/addons/payment_payumoney/models/__init__.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import payment
diff --git a/addons/payment_payumoney/models/payment.py b/addons/payment_payumoney/models/payment.py
new file mode 100644
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+++ b/addons/payment_payumoney/models/payment.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import hashlib
+
+from werkzeug import urls
+
+from odoo import api, fields, models, _
+from odoo.addons.payment.models.payment_acquirer import ValidationError
+from odoo.tools.float_utils import float_compare
+
+import logging
+
+_logger = logging.getLogger(__name__)
+
+
+class PaymentAcquirerPayumoney(models.Model):
+    _inherit = 'payment.acquirer'
+
+    provider = fields.Selection(selection_add=[
+        ('payumoney', 'PayUmoney')
+    ], ondelete={'payumoney': 'set default'})
+    payumoney_merchant_key = fields.Char(string='Merchant Key', required_if_provider='payumoney', groups='base.group_user')
+    payumoney_merchant_salt = fields.Char(string='Merchant Salt', required_if_provider='payumoney', groups='base.group_user')
+
+    def _get_payumoney_urls(self, environment):
+        """ PayUmoney URLs"""
+        if environment == 'prod':
+            return {'payumoney_form_url': 'https://secure.payu.in/_payment'}
+        else:
+            return {'payumoney_form_url': 'https://sandboxsecure.payu.in/_payment'}
+
+    def _payumoney_generate_sign(self, inout, values):
+        """ Generate the shasign for incoming or outgoing communications.
+        :param self: the self browse record. It should have a shakey in shakey out
+        :param string inout: 'in' (odoo contacting payumoney) or 'out' (payumoney
+                             contacting odoo).
+        :param dict values: transaction values
+
+        :return string: shasign
+        """
+        if inout not in ('in', 'out'):
+            raise Exception("Type must be 'in' or 'out'")
+
+        if inout == 'in':
+            keys = "key|txnid|amount|productinfo|firstname|email|udf1|||||||||".split('|')
+            sign = ''.join('%s|' % (values.get(k) or '') for k in keys)
+            sign += self.payumoney_merchant_salt or ''
+        else:
+            keys = "|status||||||||||udf1|email|firstname|productinfo|amount|txnid".split('|')
+            sign = ''.join('%s|' % (values.get(k) or '') for k in keys)
+            sign = self.payumoney_merchant_salt + sign + self.payumoney_merchant_key
+
+        shasign = hashlib.sha512(sign.encode('utf-8')).hexdigest()
+        return shasign
+
+    def payumoney_form_generate_values(self, values):
+        self.ensure_one()
+        base_url = self.get_base_url()
+        payumoney_values = dict(values,
+                                key=self.payumoney_merchant_key,
+                                txnid=values['reference'],
+                                amount=values['amount'],
+                                productinfo=values['reference'],
+                                firstname=values.get('partner_name'),
+                                email=values.get('partner_email'),
+                                phone=values.get('partner_phone'),
+                                service_provider='payu_paisa',
+                                surl=urls.url_join(base_url, '/payment/payumoney/return'),
+                                furl=urls.url_join(base_url, '/payment/payumoney/error'),
+                                curl=urls.url_join(base_url, '/payment/payumoney/cancel')
+                                )
+
+        payumoney_values['udf1'] = payumoney_values.pop('return_url', '/')
+        payumoney_values['hash'] = self._payumoney_generate_sign('in', payumoney_values)
+        return payumoney_values
+
+    def payumoney_get_form_action_url(self):
+        self.ensure_one()
+        environment = 'prod' if self.state == 'enabled' else 'test'
+        return self._get_payumoney_urls(environment)['payumoney_form_url']
+
+
+class PaymentTransactionPayumoney(models.Model):
+    _inherit = 'payment.transaction'
+
+    @api.model
+    def _payumoney_form_get_tx_from_data(self, data):
+        """ Given a data dict coming from payumoney, verify it and find the related
+        transaction record. """
+        reference = data.get('txnid')
+        pay_id = data.get('mihpayid')
+        shasign = data.get('hash')
+        if not reference or not pay_id or not shasign:
+            raise ValidationError(_('PayUmoney: received data with missing reference (%s) or pay_id (%s) or shasign (%s)') % (reference, pay_id, shasign))
+
+        transaction = self.search([('reference', '=', reference)])
+
+        if not transaction:
+            error_msg = (_('PayUmoney: received data for reference %s; no order found') % (reference))
+            raise ValidationError(error_msg)
+        elif len(transaction) > 1:
+            error_msg = (_('PayUmoney: received data for reference %s; multiple orders found') % (reference))
+            raise ValidationError(error_msg)
+
+        #verify shasign
+        shasign_check = transaction.acquirer_id._payumoney_generate_sign('out', data)
+        if shasign_check.upper() != shasign.upper():
+            raise ValidationError(_('PayUmoney: invalid shasign, received %s, computed %s, for data %s') % (shasign, shasign_check, data))
+        return transaction
+
+    def _payumoney_form_get_invalid_parameters(self, data):
+        invalid_parameters = []
+
+        if self.acquirer_reference and data.get('mihpayid') != self.acquirer_reference:
+            invalid_parameters.append(
+                ('Transaction Id', data.get('mihpayid'), self.acquirer_reference))
+        #check what is buyed
+        if float_compare(float(data.get('amount', '0.0')), self.amount, 2) != 0:
+            invalid_parameters.append(
+                ('Amount', data.get('amount'), '%.2f' % self.amount))
+
+        return invalid_parameters
+
+    def _payumoney_form_validate(self, data):
+        status = data.get('status')
+        result = self.write({
+            'acquirer_reference': data.get('payuMoneyId'),
+            'date': fields.Datetime.now(),
+        })
+        if status == 'success':
+            self._set_transaction_done()
+        elif status != 'pending':
+            self._set_transaction_cancel()
+        else:
+            self._set_transaction_pending()
+        return result