![Fintechee.io seller process to sell digital products](https://fintechee.io/wp-content/uploads/2022/08/fintechee_inventory_seller_process-1.png)
- Refer to C/C++/Mql VeriSig example at https://github.com/fintechees/Expert-Advisor-Studio/tree/master/EA/Plugin-for-MQL/testverisig.cpp .
- Add the source codes associated to VeriSig to your source codes.
- Access Fintechee.io inventory for seller to generate public/private key pair(Only the public key will be displayed).
![Fintechee.io inventory for seller](https://fintechee.io/wp-content/uploads/2022/08/fintechee_inventory_for_seller-1024x518.png)
![Fintechee.io inventory for seller](https://fintechee.io/wp-content/uploads/2022/08/fintechee_inventory_seller_1-1024x651.png)
![Public key generated by Fintechee.io inventory](https://fintechee.io/wp-content/uploads/2022/08/fintechee_inventory_seller_2-1024x729.png)
- Replace the value of APPLICATION_PUBLIC_KEY with the public key that you generated.
string APPLICATION_PUBLIC_KEY = "";
- Download C/C++/Mql compiler from https://github.com/fintechees/Expert-Advisor-Cpp-Compiler and compile your source codes at Fintechee.com/web-trader .
![Fintechee.com WEB Trader C CPP Mql Compiler](https://fintechee.io/wp-content/uploads/2022/08/fintechee_webtrader_compiler-1024x428.png)
- Upload the compiled files(js, wasm) and the guide(txt) to Fintechee.io inventory for seller and then create a product at Fintechee.io seller dashboad.
![Fintechee.io inventory for seller](https://fintechee.io/wp-content/uploads/2022/08/fintechee_inventory_seller_3-1024x727.png)
![Fintechee.io seller dashboard](https://fintechee.io/wp-content/uploads/2022/08/fintechee_seller_deshboard-1024x616.png)
- Fintechee reviews your product details and approves listing your product.