Magento and payeer module = Invalid Signature?

Question

Magento

Hello! I installed the payeer module on Magento , entered the data and when paying, "Invalid Signature" pops up. The essence of this error is that Magento does not prescribe decimal places, and an incorrect signature is obtained.
Example.
This produces magento:

http://payeer.com/merchant/?
m_shop=********&
m_orderid=100000024&
m_amount=1160&
m_curr=RUB&
m_desc=0J7Qv9C70LDRgtCwINC00L7RgdGC0LDQstC60Lgg0L3QsCBkYWRkeW1hcmtldC5ydQ%3D%3D&
m_sign=7CEC8AA7B90768BFD2A4B54440ED5940EA1D4A7230878803EBF8A4F340120412

And this is how payeer gives out, that is, as it should be:

http://payeer.com/merchant/?
m_shop=********&
m_orderid=100000024&
m_amount=1160.00&
m_curr=RUB&
m_desc=0J7Qv9C70LDRgtCwINC00L7RgdGC0LDQstC60Lgg0L3QsCBkYWRkeW1hcmtldC5ydQ%3D%3D&
m_sign=2000718785B861B60058FC6C2EECB69FD147730BBA33D6E60DDFBC8BBD804B18&
lang=ru

Pay attention to 1160 vs 1160.00
I've been scratching my head for the 3rd day. Tell me your thoughts, please ...
PS: The module can be downloaded from here - https://payeer.com/upload/iblock/a14/magento.zip
Registration there does not take much time, you do not need to enter almost any passport data, you can specify " left" for testing, they don't pay much attention to it.

Answer 1

After several days of communication with the TP, they corrected the module, now everything works.
Thanks for answers.

Answer 2

Most likely, it is not Magenta that prescribes the wrong number (incomplete), but the module. You need to look for the reason there. Do you have 2 digits in the decimal part on the product page?
I have two:

Answer 3

Here you need to check with a debugger.
Model DL_Payeer_Model_Method_Dlpayeer method preparePaymentData See
that cost formatting is used. You need to check why it doesn't work in your case