Collators aggregate parachain transactions block candidates and producing state transition proofs for validators based on those blocks.

Kilt is digital identity solution powered by Polkadot Relay chain.

KILT holders own and govern the protocol.

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Kilt

# Kilt Block time Methodology

## 1. Overview

Block time measures the average time interval between consecutive blocks on the Kilt blockchain, calculated as a daily average and expressed in milliseconds. This metric indicates the blockchain's block production efficiency and consistency. The calculation determines the time elapsed between each block and its predecessor, then averages these intervals across each day.

## 2. Data sources

- **Kilt blockchain block data**: Raw block records from the Kilt blockchain containing block numbers and timestamps for each produced block
- **Block metadata**: Block timestamp information that records when each block was created and added to the blockchain

## 3. Step-by-step calculation

### Component A: Block data extraction
- **Purpose**: Retrieves basic block information from the Kilt blockchain
- **Logic**: Extracts `block_timestamp` and `block_number` from raw Kilt blockchain block data. Filters out the genesis block (block number 0) since it has a timestamp at the start of Unix time which would skew calculations. For incremental updates, only processes blocks from recent days based on the configured lookback period.
- **Key fields**: `block_timestamp` (when the block was created), `block_number` (sequential block identifier)

### Component B: Timestamp pairing
- **Purpose**: Pairs each block with its predecessor's timestamp to enable time difference calculations
- **Logic**: Uses a lag window function ordered by block number to retrieve the previous block's timestamp for each current block. This creates pairs of consecutive blocks needed to calculate the time elapsed between them.
- **Key fields**: `block_timestamp` (current block time), `previous_timestamp` (preceding block time), `block_number`

### Component C: Block time calculation
- **Purpose**: Calculates the actual time interval between consecutive blocks
- **Logic**: Computes the timestamp difference between each block and its predecessor using millisecond precision. Truncates block timestamps to daily boundaries for aggregation. Excludes the first block in the sequence since it has no predecessor.
- **Key fields**: `timestamp` (day-truncated block timestamp), `block_time` (milliseconds between consecutive blocks)

### Component D: Daily aggregation
- **Purpose**: Aggregates individual block times into daily averages
- **Logic**: Groups block time measurements by day and calculates the average block time for each day. Adds standard metadata including chain identifier (`kilt`), market sector (`blockchains_l2`), and business segment (`blockchain`). Sets product identifier to null since this is a chain-level metric.
- **Key fields**: `timestamp` (daily boundary), `block_time` (average milliseconds per block for that day)

### Final aggregation
- **Combining components**: The daily averages flow through the `finalize_metric_block_time` macro which likely applies standardization, additional metadata, and formatting consistency
- **Currency conversion**: Not applicable for this time-based metric
- **Time aggregation**: Block times are aggregated to daily averages, with timestamps truncated to day boundaries
- **Final calculation**: The final metric represents the average time in milliseconds between consecutive blocks for each day on the Kilt blockchain

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

avg(block_timestamp - previous_block_timestamp)

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Block time

Block time

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