BOB batches users' transactions and submits them to Ethereum, paying a share of the transaction fees to Ethereum validators (expense).

BOB is an L2 smart contract platform for decentralized applications on Ethereum. BOB was founded by Alexei Zamyatin and Dominik Harz and launched in 2024.

BOB team & investors own and govern the protocol. BOB's investors include Castle Island Ventures, IOSG Ventures, Coinbase Ventures, etc.

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Blockchains (L2)

BOB (Build on Bitcoin)

# BOB (Build on Bitcoin) Block time Methodology

## 1. Overview

Average block time measures the mean time interval between consecutive blocks on the BOB Layer 2 blockchain, aggregated daily. This metric indicates the network's block production consistency and performance. The calculation determines how long, on average, it takes for the BOB network to produce each new block by analyzing the timestamp differences between consecutive blocks and averaging these intervals over daily periods.

## 2. Data sources

- **BOB blockchain block headers**: Raw block data from the BOB Layer 2 blockchain containing block timestamps and block numbers
- **BOB blockchain metadata**: Block infrastructure data including block production timing information

## 3. Step-by-step calculation

### Component A: Block data extraction
- **Purpose**: Retrieve basic block timing data from the BOB blockchain
- **Logic**: Extract `block_timestamp` and `block_number` fields from BOB blockchain block headers. Filter out the genesis block (block number 0) since it contains an artificial timestamp at the Unix epoch start that would skew calculations. For incremental updates, include a lookback period to ensure data completeness and handle any late-arriving block data.
- **Key fields**: `block_timestamp` (when the block was created), `block_number` (sequential block identifier)

### Component B: Consecutive block pairing
- **Purpose**: Pair each block with its immediate predecessor to enable time difference calculation
- **Logic**: Use a LAG window function ordered by `block_number` to associate each block with the timestamp of the previous block. This creates pairs of consecutive blocks where the time difference can be calculated. Blocks without a previous block (first block after genesis) are excluded from further calculation.
- **Key fields**: `block_timestamp` (current block time), `previous_timestamp` (previous block time from LAG function)

### Component C: Block interval calculation
- **Purpose**: Calculate the actual time taken between consecutive block productions
- **Logic**: Compute the time difference in milliseconds between each block and its predecessor using timestamp difference functions. Truncate block timestamps to daily granularity to enable daily aggregation. Only include blocks that have a valid previous timestamp to ensure accurate interval calculations.
- **Key fields**: `block_time` (milliseconds between consecutive blocks), `timestamp` (daily truncated timestamp)

### Component D: Daily aggregation
- **Purpose**: Calculate the average block time for each day
- **Logic**: Group all block intervals by day and calculate the average block time across all blocks produced within each daily period. Add metadata including chain identifier (`bob`), market sector (`blockchains_l2`), and business segment (`blockchain`). The average represents the typical block production interval for that day.
- **Key fields**: `block_time` (average milliseconds per block for the day), `timestamp` (daily date), chain and sector identifiers

### Final aggregation
- **Combining components**: The daily average block times are processed through a finalization macro that standardizes the output format and applies quality filters
- **Currency conversion**: Not applicable for timing metrics
- **Time aggregation**: Daily boundaries are used with timestamp truncation to day level granularity
- **Final calculation**: The final metric represents the average time in milliseconds between consecutive blocks for each day on the BOB blockchain, filtered for chain data availability to ensure metric quality

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

avg(block_timestamp - previous_block_timestamp)

BOB (Build on Bitcoin)BOB

Block time

Block time

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