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

Interlay is a decentralized Bitcoin bridge powered by Polkadot Relay chain.

INTR holders own and govern the protocol. Interlay’s investors include IOSG Ventures, Hypersphere Ventures, D1 Ventures, etc.

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Interlay

# Interlay Block time Methodology

> **Archived 2026-07-23.** Token Terminal stopped tracking Interlay after the project announced it is winding down operations. The methodology below describes how this metric was calculated while the chain was tracked; historical values remain accurate and accessible.

## 1. Overview

Block time measures the average time interval between consecutive blocks on the Interlay blockchain network, calculated daily. This metric provides insights into network performance, mining/validation efficiency, and overall blockchain health. The calculation determines how long it takes on average for the network to produce new blocks, measured in milliseconds and averaged across each day.

## 2. Data sources

- **Interlay blockchain block data**: Raw block records from the Interlay network containing block numbers and timestamps for each block produced on the chain
- **Block timestamps**: Precise timestamps indicating when each block was mined or validated on the Interlay network
- **Block numbers**: Sequential block identifiers that establish the chronological order of blocks on the Interlay chain

## 3. Step-by-step calculation

### Component A: Block data preparation
- **Purpose**: Extract and prepare block timestamp and number data for time interval calculations
- **Logic**: Retrieve block timestamps and block numbers from Interlay blockchain data, filtering out the genesis block (block number 0) which is timestamped at the Unix epoch and would skew calculations. Apply incremental loading logic to process only recent blocks when updating the metric.
- **Key fields**: `block_timestamp` representing when each block was produced, `block_number` providing sequential ordering of blocks

### Component B: Consecutive block pairing
- **Purpose**: Create pairs of consecutive blocks to enable time difference calculations
- **Logic**: Use a lag window function ordered by block number to associate each block with the timestamp of the immediately preceding block. This creates pairs of consecutive blocks where time intervals can be measured.
- **Key fields**: `block_timestamp` for current block, `previous_timestamp` for the preceding block, `block_number` for ordering

### Component C: Block time interval calculation
- **Purpose**: Calculate the time difference between consecutive blocks
- **Logic**: Compute the time difference in milliseconds between each block and its predecessor using timestamp subtraction. Truncate timestamps to daily boundaries to enable daily aggregation. Exclude the first block in the sequence since it has no predecessor.
- **Key fields**: `timestamp` truncated to day level, `block_time` representing milliseconds between consecutive blocks

### Final aggregation
- **Combining components**: Average all block time intervals within each day to produce a single daily block time metric
- **Currency conversion**: Not applicable for this time-based metric
- **Time aggregation**: Group by daily timestamp boundaries and calculate the mean block time across all blocks produced within each day
- **Final calculation**: The final metric represents the average time in milliseconds between consecutive blocks for each day, providing insight into Interlay network performance and consistency. The result includes standard metadata fields like chain identifier (`interlay`), market sector (`blockchains_l1`), and business segment (`blockchain`) through the finalize_metric_block_time macro.

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

avg(block_timestamp - previous_block_timestamp)

InterlayINTR

Archived

Block time

Block time

Competitive landscape

Chain breakdown