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Learn Anchor - 10 Code Examples & CST Typing Practice Test

Anchor is a Rust-based framework for Solana smart contract (program) development, testing, and deployment. It simplifies building Solana dApps by providing a high-level abstraction over Solana programs and client interactions.

View all 10 Anchor code examples →
Anchor Simple Counter ProgramAnchor Token Mint ExampleAnchor Initialize Account ExampleAnchor Transfer SOL ExampleAnchor PDA ExampleAnchor Multisig ExampleAnchor Escrow ExampleAnchor Event Emission ExampleAnchor Custom Error ExampleAnchor Program With Seeds Example

Learn ANCHOR with Real Code Examples

Updated Nov 24, 2025

Explain

Anchor allows developers to write, test, and deploy Solana programs efficiently using Rust.

It provides scaffolding, IDL (Interface Definition Language) generation, and client SDKs for interacting with deployed programs.

Anchor streamlines Solana development by managing accounts, PDAs (Program Derived Addresses), and transaction boilerplate.

Core Features

Program scaffolding with `anchor init`

Program compilation and deployment via `anchor build`/`anchor deploy`

Type-safe client SDK generation (TypeScript, Rust)

Account serialization/deserialization helpers

Testing with local validator and program simulation

Basic Concepts Overview

Program: Solana smart contract written in Rust

Instruction: Function in a program invoked by a transaction

Account: Storage unit in Solana, holding data and SOL

PDA: Program Derived Address for deterministic account management

IDL: Interface Definition Language file describing the program

Project Structure

programs/ - Rust program files

tests/ - Rust test scripts for program instructions

migrations/ - deployment scripts

target/ - compiled binaries

Anchor.toml - project configuration and Solana cluster info

Building Workflow

Initialize new Anchor project: `anchor init project_name`

Write Solana program in Rust in `programs/` directory

Build and compile program: `anchor build`

Write client interactions and tests in `tests/` or TypeScript client

Deploy program to Solana cluster using `anchor deploy`

Difficulty Use Cases

Beginner: deploy simple Solana programs to local validator

Intermediate: write automated tests for instructions

Advanced: manage PDAs and complex account interactions

Expert: deploy multi-program dApps on devnet/mainnet

Enterprise: integrate Solana programs with TypeScript/React frontends

Comparisons

Anchor vs Solana SDK: Anchor reduces boilerplate and manages accounts/PDAs

Anchor vs Metaplex CLI: Anchor focuses on program development; Metaplex is NFT-specific

Anchor vs Hardhat/Ethereum frameworks: Solana vs Ethereum ecosystem, Rust vs JS/Python

Anchor vs web3.js client: web3.js is only client, Anchor provides full program+client workflow

Anchor vs Serum SDK: Anchor is general-purpose; Serum SDK is DEX-specific

Versioning Timeline

2020 - Initial release by Project Serum team

2021 - Added IDL generation and improved testing framework

2022 - Macros for account validation and error handling introduced

2023 - Enhanced TypeScript client SDK integration

2025 - Latest version with improved Rust support and Solana compatibility

Glossary

Anchor: Rust-based Solana development framework

Program: Solana smart contract

Instruction: callable function in a program

Account: storage unit on Solana blockchain

PDA: Program Derived Address for deterministic accounts

Installation Setup

Install Rust and Solana CLI

Install Anchor CLI: `cargo install --git https://github.com/coral-xyz/anchor anchor-cli --locked`

Set Solana cluster (devnet/testnet/mainnet)

Verify installation with `anchor --version` and `solana --version`

Optionally install Node.js and npm for TypeScript client SDKs

Environment Setup

Install Rust and Solana CLI

Install Anchor CLI

Configure Solana cluster (devnet/testnet/mainnet)

Verify toolchain versions

Install Node.js/npm for TypeScript client

Config Files

Anchor.toml - project and cluster configuration

programs/ - Rust program files

tests/ - Rust unit tests

migrations/ - deployment scripts

target/ - compiled binaries

Cli Commands

anchor init

anchor build

anchor test

anchor deploy

anchor upgrade

Internationalization

Community contributions globally

Documentation in English, translations by community

Compatible with global Solana clusters

Supports international token standards (SPL)

Adopted in global DeFi/NFT projects

Accessibility

Cross-platform Rust support

Open-source under Apache 2.0

Solana cluster support (local/devnet/mainnet)

Accessible to Rust and Solana developers

Integrates with standard frontend tools via IDL

Ui Styling

TypeScript/React client for interacting with programs

Jupyter notebooks for experimentation

CLI outputs for debugging transactions

Visualize account and transaction logs

Integrate dashboards for monitoring programs

State Management

Track deployed program IDs

Manage PDAs and accounts securely

Log transaction history for programs

Version IDL files

Maintain reproducible testing scripts

Data Management

Maintain consistent account layouts

Serialize/deserialize program data using Anchor macros

Cache local validator data for tests

Document program states and migrations

Batch transactions where possible

Architecture

Rust-based program files defining Solana instructions and accounts

Anchor macros to handle serialization, validation, and errors

IDL files describing program interface for clients

CLI and client SDK for building, testing, and interacting

Integration with Solana JSON RPC nodes for deployment and interaction

Rendering Model

Rust-based program with Anchor macros

IDL files describing program interface

Client SDKs for TypeScript and Rust

CLI-driven scaffolding, building, testing, deploying

Integration with Solana clusters for live deployment

Architectural Patterns

Program-centric development

Account and PDA abstraction

Instruction-based transaction workflow

Separation of program and client logic

Test-driven development using local validator

Real World Architectures

DeFi program pipelines on Solana

NFT minting and marketplace programs

Automated staking/reward programs

Solana dApp backends with TypeScript frontend

Hybrid systems combining multiple Solana programs

Design Principles

Reduce boilerplate in Solana programs

Provide type-safe client integration

Enforce best practices for account and PDA management

Enable robust testing and simulation

Improve developer productivity on Solana ecosystem

Scalability Guide

Use batch transactions for multi-instruction programs

Automate testing for multiple programs

Deploy programs using CI/CD pipelines

Integrate client SDK with frontend for scaling

Monitor compute budget and optimize programs

Migration Guide

Upgrade Anchor CLI via cargo

Test existing programs with new version

Update Rust dependencies if needed

Verify IDL generation and client integration

Ensure reproducible deployment on target cluster

Performance Notes

Local validator is faster for testing than devnet/mainnet

Parallel tests can speed up program verification

Solana network fees (lamports) can impact repeated deployments

IDL reduces runtime client errors and improves efficiency

Optimized account layouts reduce compute budget usage

Security Notes

Validate accounts and PDA derivations

Never hardcode private keys in client scripts

Audit program logic before mainnet deployment

Monitor transaction logs for unexpected states

Follow Solana program best practices for security

Monitoring Analytics

Monitor transaction success/failures

Track account state changes

Log compute unit usage for programs

Audit program migrations

Visualize testing and deployment metrics

Code Quality

Follow Rust coding best practices

Use macros for boilerplate reduction

Document program logic and accounts

Maintain test coverage for instructions

Validate programs on local validator before mainnet

Practical Examples

Deploy a simple token program to local Solana validator

Write unit tests for program instructions

Interact with deployed program via TypeScript client

Generate IDL and use it for frontend integration

Deploy NFT minting program to devnet

Troubleshooting

Check Solana cluster connection (devnet/mainnet)

Ensure program compilation passes with correct Rust toolchain

Validate PDA derivation and account initialization

Debug failing tests in local validator

Check transaction errors and Solana logs

Testing Guide

Use `anchor test` for automated instruction testing

Write test fixtures for accounts and program state

Simulate transactions in local validator

Validate expected state changes and emitted events

Check error handling and account constraints

Deployment Options

Deploy to local validator for development

Deploy to devnet/testnet for staging

Deploy to mainnet for production

Use `anchor deploy` scripts for multi-program deployment

Integrate deployments into CI/CD pipelines for automation

Tools Ecosystem

Anchor CLI for scaffolding, building, deploying

Solana CLI for network management

Local validator for testing

TypeScript client SDK generated from IDL

Rust tooling (cargo, solana-program library)

Integrations

Solana devnet, testnet, mainnet

Metaplex for NFTs

Serum and other DeFi protocols

React/TypeScript frontends via generated IDL clients

Rust libraries for program logic and serialization

Productivity Tips

Use macros for repetitive account and instruction logic

Generate IDL for type-safe client integration

Leverage local validator for fast testing

Batch tests and transactions for efficiency

Use Anchor CLI for streamlined project workflow

Challenges

Debugging transactions on Solana cluster

Managing account constraints and PDAs

Optimizing compute budget and storage usage

Testing multi-instruction programs

Integrating client SDK with frontend applications

Learning Path

Learn Rust programming basics

Understand Solana accounts, PDAs, and transactions

Practice Anchor CLI and project workflow

Write automated tests using local validator

Deploy and interact with programs on devnet/mainnet

Skill Improvement Plan

Week 1: Anchor project setup and local validator testing

Week 2: Write and test simple token programs

Week 3: Learn PDAs, accounts, and error handling

Week 4: Deploy NFT or DeFi programs to devnet

Week 5: Integrate with TypeScript/React frontends using IDL

Interview Questions

What is Anchor and why is it used?

Explain the purpose of IDL in Anchor

How do you deploy a Solana program using Anchor?

Describe account and PDA management in Anchor

Compare Anchor with other Solana or Ethereum development tools

Cheat Sheet

anchor init = create new project

anchor build = compile program

anchor test = run program tests

anchor deploy = deploy program to cluster

anchor upgrade = upgrade deployed program

Books

Mastering Solana Development with Anchor

Hands-On Solana Smart Contracts with Rust

Building DeFi dApps on Solana with Anchor

NFT Projects on Solana with Anchor

Solana Program Testing and Deployment Guide

Tutorials

Anchor official tutorials

Deploy Solana token programs with Anchor

NFT minting and marketplace tutorials

Testing Solana programs with local validator

TypeScript client integration with IDL examples

Official Docs

https://project-serum.github.io/anchor/

https://github.com/coral-xyz/anchor

Community Links

Anchor GitHub repository

Solana Discord/Anchor channels

Solana StackExchange

Rust blockchain developer forums

Solana DeFi/NFT developer communities

Community Support

Anchor GitHub repository

Solana Discord and Anchor channels

Solana StackExchange

Rust blockchain developer forums

Solana DeFi/NFT developer communities

Monetization

Develop DeFi protocols

Launch NFT platforms

Provide Solana program development services

Offer consulting for Anchor-based dApps

Create client SDKs and automation tools

Future Roadmap

Enhanced Rust and Solana version compatibility

Better integration with frontend frameworks

Extended macro library for advanced patterns

Improved CI/CD support for Solana programs

Expanded community tooling and templates

When Not To Use

If targeting blockchains other than Solana

For rapid prototyping without Rust knowledge

When minimal program deployment without IDL is sufficient

If using prebuilt programs and only client-side interaction is needed

Projects with team unfamiliar with Rust or Solana

Final Summary

Anchor is a Rust framework for Solana smart contract development, testing, and deployment.

Reduces boilerplate and enforces best practices for program and account management.

IDL generation enables type-safe client interactions.

Supports testing with local validator and automated scripts.

Widely adopted in Solana DeFi, NFT, and general dApp ecosystems.

Faq

Is Anchor free?

Yes - open-source under Apache 2.0 license.

Which blockchain does Anchor support?

Solana (devnet, testnet, mainnet).

Can I deploy NFTs with Anchor?

Yes - supports NFT minting programs and Metaplex integration.

Does Anchor support automated testing?

Yes - integrated with local validator and test framework.

Can Anchor programs interact with DeFi protocols?

Yes - supports Serum, Raydium, and other Solana DeFi programs.

Code Sample Descriptions

1

Anchor Simple Counter Program

#[program]
mod counter {
    use super::*;
    #[state]
    pub struct Counter {
        pub value: u64,
    }

    impl Counter {
        pub fn new(ctx: Context<New>) -> Result<Self> {
        Ok(Counter { value: 0 })
        }

        pub fn increment(&mut self, ctx: Context<Increment>) -> Result<()> {
        self.value += 1;
        Ok(())
        }

        pub fn reset(&mut self, ctx: Context<Reset>) -> Result<()> {
        self.value = 0;
        Ok(())
        }
    }
}

A minimal Anchor program defining a counter with increment and reset functionality, demonstrating the use of Anchor macros and client interaction.

Let’s Try →
2

Anchor Token Mint Example

#[program]
mod token_mint {
    use super::*;
    pub fn mint_tokens(ctx: Context<MintTokens>, amount: u64) -> Result<()> {
        let cpi_accounts = token::MintTo {
        mint: ctx.accounts.mint.to_account_info(),
        to: ctx.accounts.receiver.to_account_info(),
        authority: ctx.accounts.authority.to_account_info(),
        };
        let cpi_program = ctx.accounts.token_program.to_account_info();
        token::mint_to(CpiContext::new(cpi_program, cpi_accounts), amount)?;
        Ok(())
    }
}

Defines a simple Anchor program to mint SPL tokens to a user.

Let’s Try →
3

Anchor Initialize Account Example

#[program]
mod init_account {
    use super::*;
    #[derive(Accounts)]
    pub struct Init<'info> {
        #[account(init, payer=user, space=8+8)]
        pub my_account: ProgramAccount<'info, MyAccount>,
        #[account(signer)]
        pub user: AccountInfo<'info>,
        pub system_program: Program<'info, System>,
    }

    #[account]
    pub struct MyAccount {
        pub data: u64,
    }

    pub fn create(ctx: Context<Init>) -> Result<()> {
        ctx.accounts.my_account.data = 0;
        Ok(())
    }
}

Initializes a new account using Anchor with default values.

Let’s Try →
4

Anchor Transfer SOL Example

#[program]
mod sol_transfer {
    use super::*;
    pub fn transfer(ctx: Context<Transfer>, amount: u64) -> Result<()> {
        **ctx.accounts.from.try_borrow_mut_lamports()? -= amount;
        **ctx.accounts.to.try_borrow_mut_lamports()? += amount;
        Ok(())
    }

    #[derive(Accounts)]
    pub struct Transfer<'info> {
        #[account(mut)]
        pub from: Signer<'info>,
        #[account(mut)]
        pub to: AccountInfo<'info>,
    }
}

Transfers SOL from one account to another using Anchor.

Let’s Try →
5

Anchor PDA Example

#[program]
mod pda_example {
    use super::*;
    pub fn store_data(ctx: Context<StoreData>, value: u64) -> Result<()> {
        let my_account = &mut ctx.accounts.my_account;
        my_account.value = value;
        Ok(())
    }

    #[derive(Accounts)]
    pub struct StoreData<'info> {
        #[account(mut, seeds=[b"my_seed".as_ref()], bump)]
        pub my_account: ProgramAccount<'info, MyAccount>,
    }

    #[account]
    pub struct MyAccount {
        pub value: u64,
    }
}

Uses a program-derived address (PDA) to store data securely.

Let’s Try →
6

Anchor Multisig Example

#[program]
mod multisig {
    use super::*;
    #[account]
    pub struct MultiSig {
        pub approvals: u8,
        pub threshold: u8,
    }

    pub fn approve(ctx: Context<Approve>) -> Result<()> {
        let multisig = &mut ctx.accounts.multisig;
        multisig.approvals += 1;
        if multisig.approvals >= multisig.threshold {
        // Execute transaction
        }
        Ok(())
    }

    #[derive(Accounts)]
    pub struct Approve<'info> {
        #[account(mut)]
        pub multisig: ProgramAccount<'info, MultiSig>,
        pub signer: Signer<'info>,
    }
}

A minimal multisig contract where multiple signatures are required to execute a function.

Let’s Try →
7

Anchor Escrow Example

#[program]
mod escrow {
    use super::*;
    pub fn initialize(ctx: Context<Initialize>) -> Result<()> {
        ctx.accounts.escrow.amount = 0;
        Ok(())
    }

    #[derive(Accounts)]
    pub struct Initialize<'info> {
        #[account(init, payer=user, space=8+8)]
        pub escrow: ProgramAccount<'info, Escrow>,
        #[account(signer)]
        pub user: AccountInfo<'info>,
        pub system_program: Program<'info, System>,
    }

    #[account]
    pub struct Escrow {
        pub amount: u64,
    }
}

Implements a basic escrow contract for token exchange.

Let’s Try →
8

Anchor Event Emission Example

#[program]
mod events {
    use super::*;
    pub fn trigger_event(ctx: Context<Trigger>, value: u64) -> Result<()> {
        emit!(MyEvent { value });
        Ok(())
    }

    #[event]
    pub struct MyEvent {
        pub value: u64,
    }

    #[derive(Accounts)]
    pub struct Trigger<'info> {}
}

Emits an event when a function is called in an Anchor program.

Let’s Try →
9

Anchor Custom Error Example

#[program]
mod custom_error {
    use super::*;
    pub fn check_value(ctx: Context<Check>, value: u64) -> Result<()> {
        if value > 100 {
        return Err(ErrorCode::ValueTooHigh.into());
        }
        Ok(())
    }

    #[error_code]
    pub enum ErrorCode {
        #[msg("Value exceeds the allowed limit")]
        ValueTooHigh,
    }

    #[derive(Accounts)]
    pub struct Check<'info> {} 
}

Demonstrates defining and using custom errors in Anchor.

Let’s Try →
10

Anchor Program With Seeds Example

#[program]
mod seeds_example {
    use super::*;
    pub fn create_account(ctx: Context<Create>, seed: u64) -> Result<()> {
        let account = &mut ctx.accounts.my_account;
        account.data = seed;
        Ok(())
    }

    #[derive(Accounts)]
    pub struct Create<'info> {
        #[account(init, seeds=[b"seed", &seed.to_le_bytes()], bump, payer=user, space=8+8)]
        pub my_account: ProgramAccount<'info, MyAccount>,
        #[account(signer)]
        pub user: AccountInfo<'info>,
        pub system_program: Program<'info, System>,
    }

    #[account]
    pub struct MyAccount {
        pub data: u64,
    }
}

Uses seeds to deterministically create program accounts.

Let’s Try →

Frequently Asked Questions about Anchor

What is Anchor?

Anchor is a Rust-based framework for Solana smart contract (program) development, testing, and deployment. It simplifies building Solana dApps by providing a high-level abstraction over Solana programs and client interactions.

What are the primary use cases for Anchor?

Writing Solana smart contracts in Rust. Generating client interfaces (IDL) for programs. Testing programs with simulated Solana clusters. Deploying Solana programs to devnet/testnet/mainnet. Automating transactions and client-side interactions

What are the strengths of Anchor?

Reduces boilerplate and enforces best practices. Simplifies account and PDA management. Strong testing support with local validator. IDL provides type-safe client interaction. Large adoption in Solana DeFi and NFT projects

What are the limitations of Anchor?

Only for Solana blockchain. Requires familiarity with Rust programming. Program size limitations dictated by Solana. Learning curve for Anchor-specific macros and patterns. Smaller ecosystem compared to Ethereum tooling like Hardhat/Brownie

How can I practice Anchor typing speed?

CodeSpeedTest offers 10+ real Anchor code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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