foundry-zksync book

zkVm

Signature

function zkVm(bool enable) external pure;

Description

Enables/Disables ZKsync context for transact/call and create instructions within a test or script execution.

Switching VMs is a intensive process that translates the entire storage back-and-forth between EVM and zkEVM, and as such must be used sparingly in a test to switch between contexts.

See Execution Overview for further details.

See zkVmSkip for a one-off and much simpler operation.

Examples

/// contract LeetContract {
///     constructor(uint8 value) public {
///         // do something
///     }
/// }

vmExt.zkVm(true);
new LeetContract(1); // deployed in zkEVM
new LeetContract(2); // deployed in zkEVM

vmExt.zkVm(false);
new LeetContract(3); // deployed in EVM
new LeetContract(4); // deployed in EVM