# X Layer Block time Methodology

## 1. Overview

Block time is defined as the average time it takes for a new block to be added to the blockchain. The speed at which the network processes transactions and updates its state is reflected by this metric. For X Layer, network performance and operational consistency are monitored through these daily measurements.

## 2. Data sources

- **Blockchain events**: Block timestamps and block numbers from block headers, covering X Layer

## 3. Step-by-step calculation

### Component A: Block data extraction and filtering

- **Purpose**: To extract block timestamps and numbers while excluding the genesis block
- **Logic**: Block timestamps and block numbers are extracted from block headers. The genesis block (block number 0) is filtered out to prevent distortion of the time intervals.
- **Key fields**: `timestamp` (block generation time), `number` (sequential block identifier)

### Component B: Block interval calculation

- **Purpose**: To determine the time elapsed between consecutive blocks
- **Logic**: The time difference between each block and its immediate predecessor is calculated in milliseconds. These individual block intervals are then grouped by day based on the block timestamp.
- **Key fields**: `timestamp` (block generation time), `number` (sequential block identifier)

### Component C: Daily average aggregation

- **Purpose**: To compute the daily average block time for the network
- **Logic**: The block intervals calculated in milliseconds are averaged for each calendar day. The resulting daily average block times are mapped to X Layer. Missing days are filled with zeros if no blocks are produced, and a chain availability filter is applied to ensure data freshness.
- **Key fields**: `timestamp` (day-truncated timestamp), `block_time` (average block time in milliseconds)

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

avg(block_timestamp - previous_block_timestamp)

Block time

X Layer

Block time

Block time

Chain breakdown