# Timestamp

### Calls

#### set

Set the current time.

This call should be invoked exactly once per block. It will panic at the finalization phase, if this call hasn't been invoked by that time.

The timestamp should be greater than the previous one by the amount specified by `MinimumPeriod`.

The dispatch origin for this call must be `Inherent`.

**Namespace**

```
api.tx.timestamp.set
```

**Type**

```typescript
function set(
  now: Compact<u64>
)
```

### Storage

#### didUpdate

Did the timestamp get updated in this block?

**Namespace**

```
api.query.timestamp.didUpdate
```

**Type**

```typescript
function didUpdate(

): bool
```

#### now

Current time for the current block.

**Namespace**

```
api.query.timestamp.now
```

**Type**

```typescript
function now(

): u64
```

undefinedundefined## Constants

#### minimumPeriod

The minimum period between blocks. Beware that this is different to the *expected* period that the block production apparatus provides. Your chosen consensus system will generally work with this to determine a sensible block time. e.g. For Aura, it will be double this period on default settings.

**Namespace**

```
api.consts.timestamp.minimumPeriod
```

**Type**

```typescript
type minimumPeriod = u64
```
