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

# TAC EVM Layer

> A complete Layer 1 blockchain providing full EVM compatibility built on Cosmos SDK

The TAC EVM Layer is a fully-fledged Layer-1 blockchain environment based on Cosmos SDK technology. It provides a secure and scalable execution environment specifically optimized for Ethereum-compatible smart contracts, allowing existing EVM dApps to be deployed without modifications or code rewrites, achieving ≈2-second finality through dPoS.

## Technical Foundation

TAC EVM Layer combines proven blockchain technologies to deliver a robust execution environment that feels familiar to Ethereum developers.

### Core Technology Stack

<AccordionGroup>
  <Accordion title="Cosmos SDK - Application Framework" icon="blocks">
    The latest Cosmos SDK provides the modular blockchain framework that powers
    TAC EVM Layer. This battle-tested foundation offers built-in modules for
    staking, governance, and inter-blockchain communication, while allowing
    custom modules for TAC-specific functionality.
  </Accordion>

  <Accordion title="Native EVM Integration" icon="settings">
    TAC EVM Layer implements native EVM execution directly within the Cosmos SDK
    framework. This isn't a compatibility layer or virtual machine running on top
    of another VM - it's true EVM execution with modern consensus guarantees.

    Every Ethereum opcode, gas calculation, and state transition rule works
    exactly as it does on Ethereum mainnet, ensuring 100% compatibility for
    existing Solidity contracts.
  </Accordion>
</AccordionGroup>

## Performance Characteristics

TAC EVM Layer maintains the security guarantees developers expect from a production blockchain.

<Tabs>
  <Tab title="Finality">
    **≈2-second finality** through Tendermint consensus mechanism provides
    deterministic execution and fast block confirmation. Transactions are
    irreversibly confirmed with minimal latency.

    **No reorganizations** are possible due to Tendermint's BFT consensus model. This
    eliminates edge cases where transactions might be reversed or reordered
    after confirmation.
  </Tab>

  <Tab title="Throughput">
    **Configurable gas limits** allow the network to adapt to demand through
    governance proposals, balancing throughput with
    decentralization requirements.

    **Parallel execution potential** exists within the Cosmos SDK framework, enabling future optimizations as the network grows.
  </Tab>

  <Tab title="Cost Efficiency">
    **EIP-1559 gas management** provides predictable transaction fees with
    automatic fee adjustment based on network demand. Users get the same fee
    predictability they expect from modern Ethereum.

    **Fee token flexibility** allows transaction fees to be paid in TAC tokens, while still
    supporting ETH-denominated gas calculations for contract compatibility.
  </Tab>
</Tabs>

## Developer Experience

TAC EVM Layer maintains complete compatibility with the Ethereum development ecosystem while providing enhanced debugging and development capabilities.

### Tool Compatibility

Every tool in the Ethereum ecosystem works seamlessly with TAC EVM Layer:

<Columns cols={2}>
  <Card title="Development Frameworks" icon="hammer">
    Hardhat, Truffle, Foundry, and Remix work without configuration changes.
    Deploy scripts, test suites, and build processes transfer directly.
  </Card>

  <Card title="Wallet Integration" icon="wallet">
    MetaMask, WalletConnect, and other Web3 wallets connect by simply adding TAC
    as a custom network. No special plugins required.
  </Card>
</Columns>

<Columns cols={2}>
  <Card title="JavaScript Libraries" icon="code">
    Web3.js, Ethers.js, and Viem work exactly as they do with Ethereum. Contract
    ABIs and interaction patterns remain identical.
  </Card>

  <Card title="Infrastructure Tools" icon="server">
    Block explorers, indexers, and monitoring tools designed for Ethereum can
    index TAC EVM Layer with minimal configuration.
  </Card>
</Columns>

## Gas and Fee Structure

TAC EVM Layer implements familiar gas mechanics with improvements for predictability and efficiency.

### EIP-1559 Implementation

TAC EVM Layer uses EIP-1559 gas pricing for predictable transaction fees:

```solidity theme={null}
// Gas calculations work exactly like Ethereum
uint256 gasUsed = gasLimit - gasleft();
uint256 effectiveGasPrice = baseFee + min(maxPriorityFee, maxFeePerGas - baseFee);
uint256 totalCost = gasUsed * effectiveGasPrice;
```

* **Base Fee**: Automatically adjusts based on network congestion, providing predictable pricing for users.

* **Priority Fee**: Allows users to pay extra for faster inclusion during high-demand periods.

* **Fee Burning**: A portion of transaction fees are burned, creating deflationary pressure on TAC tokens.