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TimestampInherent

pop_fork::inherent

Struct TimestampInherent 

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pub struct TimestampInherent { /* private fields */ }
Expand description

Timestamp inherent provider.

Generates the timestamp.set(now) inherent extrinsic that advances the chain’s timestamp by the slot duration.

§Slot Duration Detection

The provider attempts to detect the slot duration dynamically using the following fallback chain:

  1. AuraApi_slot_duration runtime API (Aura-based chains)
  2. Babe::ExpectedBlockTime metadata constant (Babe-based chains)
  3. Configured default slot duration (default: 6 seconds)

§Dynamic Metadata Lookup

The pallet and call indices are looked up dynamically from the runtime metadata, making this provider work across different runtimes without manual configuration.

Implementations§

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impl TimestampInherent

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pub fn new(slot_duration_ms: u64) -> Self

Create a new timestamp inherent provider.

§Arguments
  • slot_duration_ms - Slot duration in milliseconds
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pub fn default_relay() -> Self

Create with default settings for relay chains (6-second slots).

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pub fn default_para() -> Self

Create with default settings for parachains (12-second slots).

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pub fn timestamp_now_key() -> Vec<u8> ⓘ

Compute the storage key for Timestamp::Now.

The key is constructed as: twox_128("Timestamp") ++ twox_128("Now")

§Returns

A 32-byte storage key.

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pub async fn get_slot_duration_from_runtime( executor: &RuntimeExecutor, storage: &LocalStorageLayer, metadata: &Metadata, fallback: u64, ) -> u64

Get slot duration from the runtime, falling back to the provided default.

This function uses a three-tier detection mechanism:

  1. AuraApi_slot_duration runtime API (Aura-based chains)
  2. Babe::ExpectedBlockTime metadata constant (Babe-based chains)
  3. Fallback to the provided default value
§Arguments
  • executor - Runtime executor for calling runtime APIs
  • storage - Storage layer for state access
  • metadata - Runtime metadata for constant lookup
  • fallback - Default slot duration if detection fails (in milliseconds)
§Returns

The slot duration in milliseconds.

Trait Implementations§

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impl Default for TimestampInherent

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl InherentProvider for TimestampInherent

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fn identifier(&self) -> &'static str

Identifier for this inherent provider (for debugging/logging).
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fn provide<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, parent: &'life1 Block, executor: &'life2 RuntimeExecutor, ) -> Pin<Box<dyn Future<Output = Result<Vec<Vec<u8>>, BlockBuilderError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Generate inherent extrinsics for a new block. Read more
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fn warmup<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, parent: &'life1 Block, executor: &'life2 RuntimeExecutor, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Pre-cache expensive computations to speed up the first provide() call. Read more
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fn invalidate_cache(&self)

Invalidate cached runtime-derived values. Read more

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