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📜 Solana Smart Contracts

Solana Architecture

Concept

Solana's programming model is different from EVM chains. Everything is an Account — programs, wallets, and data storage. Programs are stateless; state lives in separate accounts. Key concepts: • Programs — executable accounts (your smart contract) • Accounts — data storage, hold SOL (lamports) • Instructions — the interface to your program • Transactions — bundle of instructions executed atomically

example.rs

// A minimal Solana program using Anchor
use anchor_lang::prelude::*;

declare_id!("Your_Program_ID_Here");

#[program]
pub mod my_first_program {
    use super::*;
    
    pub fn say_hello(ctx: Context<SayHello>) -> Result<()> {
        msg!("Hello from Solana! 🦀");
        Ok(())
    }
}

#[derive(Accounts)]
pub struct SayHello {}

Quick Check

In Solana, where does a program store its state?

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