revert

The revert function is automatically imported into every program from the prelude and it takes a u64 as an exit code.

The function will behave differently depending on the context in which it is used:

• When used inside a predicate the function will panic and crash the program
• Otherwise it will revert the virtual machine

Example

To manually force a revert we need to provide an exit code. To be able to distinguish one revert from another different exit codes can be used in different places.

    revert(42);