There are always 4 arguments on stack when `recv_internal` is called. By declaring `recv_internal` with less than 4 arguments you force FunC to ignore most deep variables (they still will be there, but your code will be unaware for the whole TVM execution). ------ **in_msg_full** - cell with raw message cell that contains all the flags and additional fields **in_msg_body** - slice that only contain body of the message Please check https://ton.org/docs/learn/tvm-instructions/tvm-overview#initialization-of-tvm for more informations.

There are always 4 arguments on stack when `recv_internal` is called. By declaring `recv_internal` with less than 4 arguments you force FunC to ignore most deep variables (they still will be there, but your code will be unaware for the whole TVM execution). Please check https://ton.org/docs/learn/tvm-instructions/tvm-overview#initialization-of-tvm for more informations.