Function set_global_timer 

pub fn set_global_timer(timestamp: u64) -> u64

👎Deprecated since 0.18.0: Use global_timer_set instead

Sets global timer.

The canister can set a global timer to make the system schedule a call to the exported canister_global_timer Wasm method after the specified time. The time must be provided as nanoseconds since 1970-01-01.

The function returns the previous value of the timer. If no timer is set before invoking the function, then the function returns zero.

Passing zero as an argument to the function deactivates the timer and thus prevents the system from scheduling calls to the canister’s canister_global_timer Wasm method.