🍉Cosmos Wasm Smart Contracts

Here’s a guide on how to deploy Cosmos Wasm Smart Contracts:

Step 1: Set Up Your Environment

1. Install Rust: Cosmos Wasm uses Rust for development. You can install Rust using rustup:

   curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

2. Install CosmWasm: Use Cargo (Rust’s package manager) to install CosmWasm:

   cargo install cosmwasm-cli

Step 2: Create a Smart Contract Project

1. Create a new project:

   cargo new my_contract --lib
   cd my_contract

2. Update Cargo.toml: Add dependencies for CosmWasm:

   [dependencies]
   cosmwasm-std = "0.14"
   cosmwasm-schema = "0.14"

Step 3: Write the Smart Contract

1. Update src/lib.rs: Write the code for your smart contract. A simple example might look like this:

   use cosmwasm_std::{entry_point, DepsMut, Env, MessageInfo, Response, StdResult};
   
   #[entry_point]
   pub fn instantiate(
       deps: DepsMut,
       _env: Env,
       _info: MessageInfo,
       _msg: InstantiateMsg,
   ) -> StdResult<Response> {
       Ok(Response::default())
   }
   
   #[entry_point]
   pub fn execute(
       deps: DepsMut,
       _env: Env,
       info: MessageInfo,
       msg: ExecuteMsg,
   ) -> StdResult<Response> {
       match msg {
           ExecuteMsg::DoSomething {} => do_something(deps, info),
       }
   }
   
   fn do_something(deps: DepsMut, info: MessageInfo) -> StdResult<Response> {
       // Logic for doing something
       Ok(Response::default())
   }

2. Define Structs: Define the messages and state you need:

   #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
   pub struct InstantiateMsg {
       pub name: String,
   }
   
   #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
   pub enum ExecuteMsg {
       DoSomething {},
   }

Step 4: Compile the Contract

1. Compile your contract:

   cargo wasm

   The result will be saved in the target/wasm32-unknown-unknown/release/my_contract.wasm directory.

Step 5: Deploy the Contract

1. Use the Cosmos CLI: You can use the CLI to deploy the contract to the Cosmos blockchain. Here’s an example of how to store the contract:

   cosmos-sdk-cli tx wasm store target/wasm32-unknown-unknown/release/my_contract.wasm --from <your_account> --chain-id <chain_id>

2. Instantiate the contract: After the contract is stored, you need to instantiate it:

   cosmos-sdk-cli tx wasm instantiate <code_id> '{"name":"example"}' --from <your_account> --label "My Contract" --chain-id <chain_id>

Step 6: Interact with the Contract

1. Send a transaction to the contract:

   cosmos-sdk-cli tx wasm execute <contract_address> '{"DoSomething": {}}' --from <your_account> --chain-id <chain_id>

Step 7: Query the Contract

1. Check the state: Use the CLI to query the contract state:

   cosmos-sdk-cli query wasm contract-state smart <contract_address> '{"get": {}}'

Conclusion

Deploying Cosmos Wasm Smart Contracts requires setting up a development environment, writing the contract code, compiling it, and then deploying it to the blockchain. You can customize the logic and messages in the contract according to your project's specific needs.