> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dune.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sei Overview

> Sei data on Dune

## What is Sei?

Sei is a Layer-1 blockchain optimized for trading and decentralized finance (DeFi). It combines the strengths of Solana and Ethereum by implementing a fast parallelized EVM chain, providing a hyper optimized execution layer that benefits from the tooling and mindshare around the EVM.

<Warning>
  Sei is a Cosmos chain with EVM modules added in the [v2 upgrade](https://www.mintscan.io/sei/proposals/55). Dune indexes the EVM data separately from the Cosmos data. As such, data latency between the two can be expected.
</Warning>

<Tip>
  * Sei (v1) was originally a Cosmos chain. On May 20, 2024, a proposal to [upgrade Sei (v2) to include EVM support](https://www.mintscan.io/sei/proposals/55) was passed. Consequently, on May 27, 2024, Sei upgraded to [v2 with EVM support](https://github.com/sei-protocol/sei-chain/blob/main/CHANGELOG.md#v552).
  * Dune indexes the EVM component of Sei directly from RPC providers, supporting standard EVM chain decoding capabilities.
  * For Cosmos data, Dune partners with a data provider, and these tables and schemas can be found in the [Cosmos Data](#cosmos-data) section.
  * The EVM and Cosmos components share the same consensus mechanism, validated by the same validators, but they operate independently with interoperability features.
  * Interoperability between EVM and Cosmos relies on [EVM Precompiles](https://www.docs.sei.io/dev-interoperability/precompiles/addr) and [Pointer Contracts](https://www.docs.sei.io/dev-interoperability/pointer-contracts). If these do not emit events, it may result in data gaps.
  * Dune's EVM data for Sei starts from the v2 upgrade at [block height 73,123,881](https://seitrace.com/block/79123881).
</Tip>

### Parallelization

Parallelization allows Sei to process multiple independent transactions simultaneously, leveraging modern hardware capabilities for enhanced performance.

### Sei Optimizations

Sei introduces four major innovations:

1. **Twin Turbo Consensus**: This feature allows Sei to reach the fastest time to finality of any blockchain at 400ms, unlocking web2 like experiences for applications.
2. **Optimistic Parallelization**: This feature allows developers to unlock parallel processing for their Ethereum applications, with no additional work.
3. **SeiDB**: This major upgrade allows Sei to handle the much higher rate of data storage, reads and writes which become extremely important for a high performance blockchain.
4. **Interoperable EVM**: This allows existing developers in the Ethereum ecosystem to deploy their applications, tooling and infrastructure to Sei with no changes, while benefiting from the 100x performance improvements offered by Sei.

### Performance Metrics

* **Time to Finality**: 400 milliseconds
* **Transactions per Second**: 5,030 (12,500 theoretical max)

### Virtual Machine Interoperability

Sei supports both EVM and CosmWasm smart contracts in different execution environments. It introduces interoperability features, such as precompiled EVM contracts and Pointer Contracts, to enable smooth interactions between both environments.

For more details, visit [Sei Interoperability Documentation](https://www.docs.sei.io/dev-interoperability).

<CardGroup cols={1}>
  <Card title="Sei documentation" icon="link" href="https://www.docs.sei.io/">
    Explore comprehensive documentation on Sei, detailing its architecture, protocol, and resources for developers.
  </Card>
</CardGroup>

## Data Catalog

### EVM Data

<CardGroup cols={2}>
  <Card title="Logs" icon="bolt" href="./raw/logs">
    Access detailed event logs from smart contracts to analyze contract activity and interactions.
  </Card>

  <Card title="Blocks" icon="cubes" href="./raw/blocks">
    Explore data on blocks processed by the Sei chain, illustrating network throughput and activity.
  </Card>

  <Card title="Transactions" icon="message-arrow-up" href="./raw/transactions">
    Transaction details that highlight the efficiency and speed of the Sei chain.
  </Card>

  <Card title="decoded" icon="file" href="./decoded/overview">
    Decoded transaction data for easier analysis and deeper understanding of contract executions.
  </Card>
</CardGroup>

### Cosmos Data

<Tip>
  Timestamp is only available on block level tables (e.g. `sei.cosmos_blocks`) with field `block_timestamp`, so you need to do an inner join on `block_height` to get timestamp to other tables.
</Tip>

<CardGroup cols={3}>
  <Card title="Blocks" icon="cube" href="/data-catalog/evm/sei/cosmos/cosmos_blocks">
    Contains each validated block in the chain.
  </Card>

  <Card title="Block Events" icon="note-sticky" href="/data-catalog/evm/sei/cosmos/cosmos_block_events">
    Contains all block-level events and attributes in the chain, partitioned by event\_index.
  </Card>

  <Card title="Transactions" icon="message-arrow-up" href="/data-catalog/evm/sei/cosmos/cosmos_transactions">
    Contains relevant data associated with each transaction.
  </Card>

  <Card title="Transaction Message Events" icon="notes" href="/data-catalog/evm/sei/cosmos/cosmos_message_events">
    Contains all events and their corresponding attributes partitioned by message\_index.
  </Card>

  <Card title="Transaction Messages" icon="note" href="/data-catalog/evm/sei/cosmos/cosmos_tx_messages">
    Contains all messages submitted to the blockchain.
  </Card>

  <Card title="Validators" icon="badge-check" href="/data-catalog/evm/sei/cosmos/cosmos_validators">
    Maps validator addresses to monikers (human-readable description) and other metadata.
  </Card>
</CardGroup>