Account Management

Methods for funding, reading, and writing accounts.

Airdrop

func (s *LiteSVM) Airdrop(pubkey solana.PublicKey, lamports uint64) error

Fund an account with lamports. Implemented as a real system-program transfer from the internal faucet, so the recipient must be able to hold the resulting balance.

priv, err := solana.NewRandomPrivateKey()
if err != nil {
    t.Fatal(err)
}
payer := priv.PublicKey()

// Airdrop 5 SOL
if err := svm.Airdrop(payer, 5_000_000_000); err != nil {
    t.Fatal(err)
}

Balance

func (s *LiteSVM) Balance(pubkey solana.PublicKey) (uint64, bool, error)

Return the account's SOL balance. The second value is false when the account does not exist - distinct from "account exists with zero lamports".

lamports, ok, err := svm.Balance(payer)
if err != nil {
    t.Fatal(err)
}
if !ok {
    t.Log("account does not exist")
} else {
    t.Logf("balance: %d lamports (%.3f SOL)", lamports, float64(lamports)/1e9)
}

GetAccount

func (s *LiteSVM) GetAccount(pubkey solana.PublicKey) *Account

Retrieve an opaque account handle, or nil if the account does not exist. Always Close the handle (or rely on the finalizer).

acct := svm.GetAccount(payer)
if acct == nil {
    t.Fatal("account missing")
}
defer acct.Close()

_ = acct.Lamports()    // uint64
_ = acct.Owner()       // solana.PublicKey
_ = acct.Executable()  // bool
_ = acct.RentEpoch()   // uint64
_ = acct.Data()        // []byte (copy)

Account methods

Method	Returns	Description
`Lamports()`	`uint64`	SOL balance
`Owner()`	`solana.PublicKey`	Owning program
`Executable()`	`bool`	Whether the account is executable
`RentEpoch()`	`uint64`	Rent epoch
`Data()`	`[]byte`	Copy of the account data
`Close()`	-	Release the underlying Rust handle

NewAccount

func NewAccount(lamports uint64, data []byte, owner solana.PublicKey, executable bool, rentEpoch uint64) (*Account, error)

Construct an Account value to pass to SetAccount. The caller still owns the returned handle and must Close it.

payload := []byte{1, 2, 3, 4}
rent, err := svm.MinimumBalanceForRentExemption(len(payload))
if err != nil {
    t.Fatal(err)
}

acct, err := litesvm.NewAccount(rent, payload, ownerProgramID, false, 0)
if err != nil {
    t.Fatal(err)
}
defer acct.Close()

SetAccount

func (s *LiteSVM) SetAccount(pubkey solana.PublicKey, acct *Account) error

Store a copy of acct at pubkey. The SVM keeps its own copy; the caller still owns acct and must Close it.

if err := svm.SetAccount(targetAddr, acct); err != nil {
    t.Fatal(err)
}

SetAccount is significantly faster than executing transactions when you just need to seed many accounts for a test. Make sure the lamports value is at least the rent-exempt minimum for the data size.

MinimumBalanceForRentExemption

func (s *LiteSVM) MinimumBalanceForRentExemption(dataLen int) (uint64, error)

Compute the lamports required for an account of the given data length to be rent-exempt.

for _, size := range []int{0, 100, 1024} {
    min, err := svm.MinimumBalanceForRentExemption(size)
    if err != nil {
        t.Fatal(err)
    }
    t.Logf("%4d bytes -> %d lamports", size, min)
}

Program Management

AddProgram

func (s *LiteSVM) AddProgram(programID solana.PublicKey, bytes []byte) error

Load an SBF program from in-memory bytes.

bytes, err := os.ReadFile("./target/deploy/my_program.so")
if err != nil {
    t.Fatal(err)
}
if err := svm.AddProgram(programID, bytes); err != nil {
    t.Fatal(err)
}

AddProgramFromFile

func (s *LiteSVM) AddProgramFromFile(programID solana.PublicKey, path string) error

Load an SBF program from a .so file path.

if err := svm.AddProgramFromFile(programID, "./target/deploy/my_program.so"); err != nil {
    t.Fatal(err)
}

AddProgramWithLoader

func (s *LiteSVM) AddProgramWithLoader(programID solana.PublicKey, bytes []byte, loaderID solana.PublicKey) error

Load an SBF program under a specific loader. Useful when testing against a non-default BPF loader version.

Batch Account Setup

For tests that need many seeded accounts, loop over SetAccount:

const N = 10
for i := 0; i < N; i++ {
    pk := solana.NewWallet().PublicKey()
    data := []byte{byte(i)}
    rent, err := svm.MinimumBalanceForRentExemption(len(data))
    if err != nil {
        t.Fatal(err)
    }

    acct, err := litesvm.NewAccount(rent, data, owner, false, 0)
    if err != nil {
        t.Fatal(err)
    }
    if err := svm.SetAccount(pk, acct); err != nil {
        acct.Close()
        t.Fatal(err)
    }
    acct.Close()
}

Always Close the *Account returned by NewAccount once the SVM has stored its copy via SetAccount - the SVM does not take ownership of the handle.

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