# Polkadot BridgeHub Transaction count Methodology

## 1. Overview

The total number of confirmed transactions added to the blockchain is measured by Transaction count. This metric is utilized to evaluate user engagement and network activity specifically within Polkadot BridgeHub. By quantifying the volume of processed extrinsics, the operational health and adoption of the bridging infrastructure are monitored over time.

## 2. Data sources

- **Blockchain events**: Confirmed `extrinsics` from Polkadot BridgeHub

## 3. Step-by-step calculation

### Component A: Polkadot BridgeHub extrinsic extraction

- **Purpose**: To identify and capture raw transaction data from the blockchain ledger.
- **Logic**: Individual transaction records are retrieved from the Polkadot BridgeHub `extrinsics` data source. For each record, the block timestamp and a unique transaction index (derived from the extrinsic identifier) are extracted and cast to the appropriate data types.
- **Key fields**: `block_timestamp`, `transaction_index`

### Component B: Polkadot BridgeHub daily aggregation

- **Purpose**: To calculate the total volume of transactions on a daily basis.
- **Logic**: Extrinsic records are truncated to daily intervals based on their block timestamp. A count of distinct transaction indices is performed to determine the total number of confirmed transactions per day. This aggregation method ensures that only unique extrinsics are included in the final count for the product.

### Component C: Normalization and gap filling

- **Purpose**: To ensure the final dataset is consistent and continuous.
- **Logic**: The aggregated transaction counts are mapped to the Polkadot BridgeHub product identifier. A zero-filling strategy is applied to provide a value for days where no transaction activity is recorded. Furthermore, a chain availability filter is utilized to restrict the output to dates where the data has been verified and approved for reporting.

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

Confirmed transactions added to the blockchain.

Transaction count

Blockchains (L2)

Network participants process transactions and receive fees from users (supply-side fees).

Polkadot is a security & interoperability platform for blockchains and applications. Polkadot was founded by Gavin Wood and launched in 2020.

DOT holders own and govern the protocol. They currently take a cut of the total transaction fees paid by users (revenue). Polkadot’s investors include Polychain, IOSG Ventures, Hashkey, etc.

Polkadot BridgeHub

Transaction count

Transaction count

Chain breakdown