Environment Configuration

All configuration methods use the builder pattern with LiteSVM::default().

with_compute_budget

pub fn with_compute_budget(self, compute_budget: ComputeBudget) -> Self

Set compute unit limits and heap size.

use solana_compute_budget::compute_budget::ComputeBudget;

let mut svm = LiteSVM::default()
    .with_compute_budget(ComputeBudget {
        compute_unit_limit: 1_400_000,
        heap_size: 256 * 1024,
        ..ComputeBudget::default()
    });

with_sigverify

pub fn with_sigverify(self, sigverify: bool) -> Self

Enable or disable signature verification. Default: true.

// Disable for faster tests
let mut svm = LiteSVM::default()
    .with_sigverify(false);

with_blockhash_check

pub fn with_blockhash_check(self, check: bool) -> Self

Enable or disable blockhash validation. Default: true.

// Disable to use any blockhash
let mut svm = LiteSVM::default()
    .with_blockhash_check(false);

with_transaction_history

pub fn with_transaction_history(self, capacity: usize) -> Self

Set number of transactions to keep in history. Default: 0.

// Keep last 100 transactions
let mut svm = LiteSVM::default()
    .with_transaction_history(100);

with_log_bytes_limit

pub fn with_log_bytes_limit(self, limit: Option<usize>) -> Self

Set maximum bytes for transaction logs. Default: Some(10_000).

// Unlimited logs
let mut svm = LiteSVM::default()
    .with_log_bytes_limit(None);

// Custom limit (50KB)
let mut svm = LiteSVM::default()
    .with_log_bytes_limit(Some(50_000));

with_lamports

pub fn with_lamports(self, lamports: u64) -> Self

Set initial lamports for fee collection. Default: 1_000_000_000.

let mut svm = LiteSVM::default()
    .with_lamports(10_000_000_000);

with_default_programs

pub fn with_default_programs(self) -> Self

Include default SPL programs (Token, Associated Token, etc.).

let mut svm = LiteSVM::default()
    .with_default_programs();

with_sysvars

pub fn with_sysvars(self) -> Self

Includes default sysvars (Clock, Rent, EpochSchedule, SlotHashes, StakeHistory, etc.).

let mut svm = LiteSVM::default()
    .with_sysvars();

with_feature_set

pub fn with_feature_set(self, feature_set: FeatureSet) -> Self

Configure Solana feature set for testing specific runtime features.

use agave_feature_set::FeatureSet;

let mut svm = LiteSVM::default()
    .with_feature_set(FeatureSet::all_enabled());

with_precompiles

#[cfg(feature = "precompiles")]
pub fn with_precompiles(self) -> Self

Includes standard precompile programs (ed25519, secp256k1, secp256r1).

let mut svm = LiteSVM::default()
    .with_precompiles();

Requires the precompiles feature flag:

[dev-dependencies]
litesvm = { version = "0.11", features = ["precompiles"] }

with_feature_accounts

pub fn with_feature_accounts(self) -> Self

Include feature gate accounts in the test environment. This ensures feature-gated Solana runtime behavior is accurately reflected in your tests.

let mut svm = LiteSVM::default()
    .with_feature_accounts();

register-tracing feature

The register-tracing feature enables detailed SBF register tracing during transaction execution. It implies the invocation-inspect-callback feature.

[dev-dependencies]
litesvm = { version = "0.11", features = ["register-tracing"] }

Use LiteSVM::new_debuggable(true) to create an instance with register tracing enabled:

#[cfg(feature = "register-tracing")]
let mut svm = LiteSVM::new_debuggable(true);

When enabled, set the SBF_TRACE_DISASSEMBLE environment variable to also dump disassembly output alongside register traces:

SBF_TRACE_DISASSEMBLE=1 cargo test

set_invocation_inspect_callback

pub fn set_invocation_inspect_callback<C: InvocationInspectCallback + 'static>(&mut self, callback: C)

Register a callback that fires before and after each program invocation. Requires the invocation-inspect-callback feature.

[dev-dependencies]
litesvm = { version = "0.11", features = ["invocation-inspect-callback"] }

use litesvm::{LiteSVM, types::InvocationInspectCallback};
use solana_svm::invoke_context::InvokeContext;
use solana_svm_transaction::svm_message::SVMMessage;

struct MyInspector;

impl InvocationInspectCallback for MyInspector {
    fn before_invocation(
        &self,
        _svm: &LiteSVM,
        _tx: &impl SVMMessage,
        _program_indices: &[u16],
        _invoke_context: &InvokeContext,
    ) {
        println!("Before program invocation");
    }

    fn after_invocation(
        &self,
        _svm: &LiteSVM,
        _invoke_context: &InvokeContext,
        _enable_register_tracing: bool,
    ) {
        println!("After program invocation");
    }
}

let mut svm = LiteSVM::new();
svm.set_invocation_inspect_callback(MyInspector);

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