# Hydration EVM Contract deployers Methodology

## 1. Overview

Contract deployers is defined as the number of unique addresses that have successfully deployed at least one smart contract on Hydration EVM. This metric is used as a proxy for the number of independent developers or entities that actively publish code onchain. Unique addresses are counted on a daily basis to reflect the scale of developer activity within the ecosystem. The resulting data is utilized to monitor the growth and adoption of the Hydration EVM environment.

## 2. Data sources

- **Blockchain events**: `Executed` events from the `ethereum` pallet, covering Hydration Substrate

## 3. Step-by-step calculation

### Component A: EVM contract deployment identification

- **Purpose**: Identify successful smart contract creations on the Hydration EVM layer.
- **Logic**: `Executed` events are parsed from the `ethereum` pallet on Hydration Substrate. The data is filtered to include only successful transactions with valid extrinsic identifiers. The deployer address and the resulting deployed contract address are extracted from the event data payload, where the deployer is identified at the first data index and the contract address at the second.
- **Key fields**: `event_data` (containing deployer and contract addresses), `block_timestamp` (timing)

### Component B: Unique deployer aggregation

- **Purpose**: Calculate the daily count of distinct developer addresses.
- **Logic**: Contract deployment records are deduplicated to ensure each unique contract address is associated with a single deployment event. Deployer addresses are then aggregated by day using UTC boundaries. A distinct count of these addresses is performed for each day to determine the total number of unique entities that published code to the network.
- **Key fields**: `contract_deployer` (developer address), `block_timestamp` (timing)

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

Unique addresses that deployed at least one smart contract.

Contract deployers

Blockchains (L2)

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

Hydration is a Polkadot parachain specialized in trading, lending, and stablecoin issuance.

HDX holders own and govern the protocol. Hydration’s investors include KR1 plc, Hypersphere, etc.

Hydration EVM

Contract deployers

Contract deployers

Chain breakdown