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

# CosmWasm Counter Contract

> A simple incrementing counter smart contract for CosmWasm / Cosmos chains.

# CosmWasm Counter Contract

A simple incrementing counter smart contract for CosmWasm / Cosmos chains.

A simple incrementing counter smart contract for CosmWasm / Cosmos chains.

## Explanation

CosmWasm contracts are compiled to WebAssembly and run on Cosmos SDK chains. The entry\_point macro marks the execute function. Messages are defined as enums with serde for JSON serialization.

## Code

```rust theme={null}
use cosmwasm_std::{entry_point, DepsMut, Env, MessageInfo, Response, StdError};
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Clone)]
pub struct State {
    pub count: i32,
    pub owner: String,
}

#[derive(Serialize, Deserialize, Clone)]
#[serde(rename_all = "snake_case")]
pub enum ExecuteMsg {
    Increment {},
    Reset { count: i32 },
}

#[entry_point]
pub fn execute(
    deps: DepsMut,
    _env: Env,
    info: MessageInfo,
    msg: ExecuteMsg,
) -> Result<Response, StdError> {
    match msg {
        ExecuteMsg::Increment {} => {
            // load state, increment, save
            Ok(Response::new()
                .add_attribute("action", "increment")
                .add_attribute("sender", info.sender.to_string()))
        }
        ExecuteMsg::Reset { count } => {
            Ok(Response::new()
                .add_attribute("action", "reset")
                .add_attribute("count", count.to_string()))
        }
    }
}
```

***

**Canonical knowledge ID:** `code-example:cosmwasm-counter-contract`