Logging
Logging is a way to record data as the program runs.
The standard library provides a logging
module which contains a generic log
function that is used to log a variable of any type.
Each call to log
appends 1 of 2 types of a receipt
to the list of receipts
Log
- Generated for non-reference types:
bool
,u8
,u16
,u32
, andu64
- Generated for non-reference types:
LogData
- Generated for reference types and
u256
- Generated for reference types and
The Rust & Typescript SDKs may be used to decode the data.
Example
To use the log
function we must import it from the standard library and pass in any generic type T
that we want to log.
fn log_data(number: u64) {
// generic T = `number` of type `u64`
log(number);
}
In the example above a u64
is used however we can pass in any generic type such as a struct, enum, string etc.