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

Polkadex is a fully non-custodial peer-to-peer orderbook-based cryptocurrency exchange for the DeFi ecosystem powered by Polkadot Relay chain.

PDEX holders own and govern the protocol. Polkadex’s investors include OKX Ventures, Outlier Ventures, Kenetic, etc.

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Blockchains (L2)

Polkadex

# Polkadex Block time Methodology

## 1. Overview

Block time measures the average time interval between consecutive blocks on the Polkadex blockchain, expressed in milliseconds and aggregated daily. Blockchain performance and network health are reflected by this metric through the tracking of block production consistency and speed. Sequential block timestamps are analyzed to determine time differences, which are then aggregated to daily averages.

## 2. Data sources

- **Blockchain events**: Block timestamps and block numbers from Polkadex blockchain data, covering Polkadex
- **External data**: Chain availability configuration used to filter results

## 3. Step-by-step calculation

### Component A: Block data preparation

- **Purpose**: Extract and filter relevant block information for time interval calculations
- **Logic**: Block timestamps and block numbers are retrieved from Polkadex blockchain data. Blocks are filtered to include data prior to January 10, 2025. The genesis block (where `block_number` is 0) is excluded since it has an artificial timestamp at the Unix epoch start.
- **Key fields**: `block_timestamp` (when each block was produced), `block_number` (sequential block identifier)

### Component B: Sequential timestamp preparation

- **Purpose**: Prepare consecutive block timestamps for time difference calculations
- **Logic**: The timestamp of the preceding block is retrieved for each current block, ordered by block number. Pairs of consecutive block timestamps are created to calculate the time intervals between block production.
- **Key fields**: `block_timestamp` (current block time), `previous_timestamp` (preceding block time), `block_number` (for ordering)

### Component C: Block interval calculations

- **Purpose**: Calculate time differences between consecutive blocks
- **Logic**: The time difference in milliseconds between each block and its predecessor is computed. Block timestamps are truncated to day boundaries for daily aggregation. The first block in the sequence is excluded since it lacks a preceding timestamp for comparison.
- **Key fields**: `timestamp` (day-level timestamp), `block_time` (milliseconds between consecutive blocks)

### Component D: Final aggregation and standardization

- **Purpose**: Group block intervals and apply network-level filters
- **Logic**: Block intervals are grouped by day and the average block time in milliseconds is calculated for each day. Daily boundaries are determined by truncating block timestamps to the day level, with all blocks produced within each day contributing to that day's average. Results include standard metadata identifying Polkadex as an L2 blockchain in the blockchain business segment. The finalized metric is standardized and filtered based on chain availability to ensure data quality standards are met.
- **Key fields**: `timestamp`, `block_time`, `chain_id`, `market_sector_id`

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

avg(block_timestamp - previous_block_timestamp)

PolkadexPDEX

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Block time

Block time

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