Zeit & Sysvars

Methoden zur Zeitmanipulation und zum Zugriff auf Systemvariablen.

Aktivieren Sie zunächst die Sysvars mit client.svm.withSysvars(), bevor Sie auf Sysvar-Methoden zugreifen.

Clock-Manipulation

warpToSlot

warpToSlot(slot: bigint): LiteSVM

Den Clock auf einen bestimmten slot vorrücken.

client.svm.withSysvars();

// Check current slot
const before = client.svm.getClock();
console.log("Current slot:", before.slot);

// Warp forward
client.svm.warpToSlot(10000n);

const after = client.svm.getClock();
console.log("New slot:", after.slot);

getClock

getClock(): Clock

Die aktuellen Clock-Sysvar-Werte abrufen.

const clock = client.svm.getClock();

console.log("Slot:", clock.slot);
console.log("Epoch:", clock.epoch);
console.log("Unix timestamp:", clock.unixTimestamp);
console.log("Epoch start timestamp:", clock.epochStartTimestamp);
console.log("Leader schedule epoch:", clock.leaderScheduleEpoch);

setClock

setClock(clock: Clock): LiteSVM

Den Clock-Sysvar überschreiben. Clock abrufen, dessen Felder ändern und dann zurückschreiben. Verwenden Sie dies, wenn Sie eine genaue Kontrolle über mehrere Clock-Felder benötigen – zum Beispiel zum Setzen des epoch oder Unix-Zeitstempels, was warpToSlot nicht aktualisiert.

const clock = client.svm.getClock();
clock.slot = 1000n;
clock.epoch = 10n;
clock.unixTimestamp = 1735689600n;
client.svm.setClock(clock);

warpToSlot aktualisiert nur slot. Verwenden Sie setClock, wenn Ihr Programm epoch oder unix_timestamp aus dem Clock-Sysvar liest.

Clock-Eigenschaften

Property	Type	Description
`slot`	`bigint`	Aktuelle slot-Nummer
`epoch`	`bigint`	Aktuelle epoch-Nummer
`unixTimestamp`	`bigint`	Unix-Zeitstempel in Sekunden
`epochStartTimestamp`	`bigint`	Beginn des aktuellen epoch
`leaderScheduleEpoch`	`bigint`	Leader-Schedule-epoch

Rent

getRent

getRent(): Rent

Den rent-Sysvar abrufen.

const rent = client.svm.getRent();

console.log("Lamports per byte-year:", rent.lamportsPerByteYear);
console.log("Exemption threshold:", rent.exemptionThreshold);
console.log("Burn percent:", rent.burnPercent);

minimumBalanceForRentExemption

minimumBalanceForRentExemption(dataLen: bigint): bigint

Berechne die minimale Anzahl an lamports, die für eine rent-Befreiung benötigt wird.

// Calculate for different data sizes
for (const size of [0n, 100n, 1000n]) {
  const min = client.svm.minimumBalanceForRentExemption(size);
  console.log(`${size} bytes: ${min} lamports`);
}

Epoch Schedule

getEpochSchedule

getEpochSchedule(): EpochSchedule

Rufe die epoch schedule sysvar ab.

const epochSchedule = client.svm.getEpochSchedule();

console.log("Slots per epoch:", epochSchedule.slotsPerEpoch);
console.log(
  "Leader schedule slot offset:",
  epochSchedule.leaderScheduleSlotOffset
);
console.log("Warmup:", epochSchedule.warmup);
console.log("First normal epoch:", epochSchedule.firstNormalEpoch);
console.log("First normal slot:", epochSchedule.firstNormalSlot);

Epoch Rewards

getEpochRewards

getEpochRewards(): EpochRewards

Rufe die epoch rewards sysvar ab.

const rewards = client.svm.getEpochRewards();

console.log("Active:", rewards.active);
console.log("Total rewards:", rewards.totalRewards);
console.log("Distributed rewards:", rewards.distributedRewards);
console.log("Total points:", rewards.totalPoints);
console.log("Num partitions:", rewards.numPartitions);
console.log(
  "Distribution starting block height:",
  rewards.distributionStartingBlockHeight
);

Slot-Informationen

getSlotHashes

getSlotHashes(): SlotHash[]

Rufe aktuelle slot-Hashes ab.

const slotHashes = client.svm.getSlotHashes();

console.log("Slot hashes count:", slotHashes.length);
if (slotHashes.length > 0) {
  console.log("First hash:", {
    slot: slotHashes[0].slot,
    hash: slotHashes[0].hash
  });
}

getSlotHistory

getSlotHistory(): SlotHistory

Rufe den slot-Verlauf ab.

const slotHistory = client.svm.getSlotHistory();
console.log("Next slot:", slotHistory.nextSlot);

getLastRestartSlot / setLastRestartSlot

getLastRestartSlot(): bigint
setLastRestartSlot(slot: bigint): LiteSVM

Den letzten Neustart-slot abrufen oder festlegen.

const lastRestart = client.svm.getLastRestartSlot();
console.log("Last restart slot:", lastRestart);

client.svm.setLastRestartSlot(500n);

Stake-Verlauf

getStakeHistory

getStakeHistory(): StakeHistory

Den Stake-Verlauf abrufen.

const stakeHistory = client.svm.getStakeHistory();
// Returns array of { epoch, entry: { effective, activating, deactivating } }

Testen zeitabhängiger Logik

Verwenden Sie warpToSlot, um zeitabhängiges Programmverhalten zu testen:

import { createClient, generateKeyPairSigner } from "@solana/kit";
import { litesvm } from "@solana/kit-plugin-litesvm";
import { signer } from "@solana/kit-plugin-signer";

async function testTimeLockedVault() {
  const mySigner = await generateKeyPairSigner();
  const client = createClient().use(signer(mySigner)).use(litesvm());
  client.svm.withSysvars();

  const unlockSlot = 10000n;

  // Setup: Create time-locked account
  // ... set up your account state ...

  // Test 1: Try to withdraw before unlock (should fail)
  const beforeClock = client.svm.getClock();
  console.log("Current slot:", beforeClock.slot);
  // ... attempt withdrawal, expect failure ...

  // Warp time forward past unlock slot
  client.svm.warpToSlot(unlockSlot + 1n);

  // Test 2: Try to withdraw after unlock (should succeed)
  const afterClock = client.svm.getClock();
  console.log("New slot:", afterClock.slot);
  // ... attempt withdrawal, expect success ...
}

Inhaltsverzeichnis