# Ajuna Substrate Average Relay Chain inclusion time Methodology

## 1. Overview

Average Relay Chain inclusion time measures the average duration between the production of a block on Ajuna Substrate and its subsequent inclusion in the Polkadot Relay Chain. This metric serves as a key indicator of consensus and finality latency within the multichain ecosystem. It is utilized to monitor the efficiency of the synchronization process between the parachain and the primary Relay Chain.

## 2. Data sources

- **Blockchain events**: `CandidateIncluded` events from `paraInclusion` pallets on Polkadot and block metadata from Ajuna Substrate, covering Polkadot and Ajuna Substrate
- **External data**: End-of-day price feeds are not utilized for this latency-based metric

## 3. Step-by-step calculation

### Component A: Relay Chain event extraction

- **Purpose**: Identify the moments when parachain block headers are recorded on the Polkadot Relay Chain
- **Logic**: `CandidateIncluded` events are parsed from the `paraInclusion` pallet on Polkadot. Data descriptors are extracted to identify the specific parachain identifier and the parachain block hash, which is represented by the header hash included in the Relay Chain extrinsic. The dataset is filtered to include only those events corresponding to the Ajuna Substrate identifier.
- **Key fields**: `block_timestamp` (inclusion time), `paraHead` (parachain block hash), `paraId` (parachain identifier)

### Component B: Parachain block production matching

- **Purpose**: Correlate Relay Chain inclusion events with the original production time on the parachain
- **Logic**: Parachain block data is retrieved from Ajuna Substrate. A join is performed between the Relay Chain events and the parachain block data using the parachain block hash as the unique key. This process pairs the timestamp of block production on Ajuna Substrate with the timestamp of its inclusion on Polkadot.
- **Key fields**: `timestamp` (production time), `block_hash` (unique block identifier)

### Component C: Latency calculation and aggregation

- **Purpose**: Determine the average daily inclusion latency in milliseconds
- **Logic**: For each matched block, the production timestamp is subtracted from the Relay Chain inclusion timestamp to calculate the inclusion time in milliseconds. These individual latency values are then aggregated and averaged across all blocks produced and included within a UTC day. Missing data points are handled through a zero-filling strategy to ensure continuity in the daily time series.
- **Key fields**: `relay_chain_timestamp`, `parachain_timestamp`, `avg_relaychain_inclusion_time`

*This methodology was automatically generated by Token Terminal's methodology analyzer.*

avg(relay_inclusion_timestamp - parachain_block_timestamp)

Average time between parachain block production and Relay Chain inclusion.

Average Relay Chain inclusion time

Blockchains (L1)

Ajuna is a gaming blockchain built on Polkadot, focused on enabling performance and scalability, for web3 gaming supporting the Unity and Unreal Engine game engines.

Ajuna Substrate

Archived

Average Relay Chain inclusion time

Average Relay Chain inclusion time

Chain breakdown