Programming Fundamentals

SDK (Software Development Kit)

A collection of libraries, tools, and documentation for building applications on a specific platform. Solana SDKs include: @solana/web3.js (TypeScript client), solana-sdk/solana-program (Rust), Anchor (Rust framework + TS client), and Umi (Metaplex). SDKs abstract low-level details like serialization, signing, and RPC communication.

IDsdkAliasSDK

Plain meaning

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A collection of libraries, tools, and documentation for building applications on a specific platform. Solana SDKs include: @solana/web3.js (TypeScript client), solana-sdk/solana-program (Rust), Anchor (Rust framework + TS client), and Umi (Metaplex). SDKs abstract low-level details like serialization, signing, and RPC communication.

Mental model

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Technical context

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Serialization, memory, data structures, and core engineering basics.

Why builders care

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SDK (Software Development Kit) (sdk)
Category: Programming Fundamentals
Definition: A collection of libraries, tools, and documentation for building applications on a specific platform. Solana SDKs include: @solana/web3.js (TypeScript client), solana-sdk/solana-program (Rust), Anchor (Rust framework + TS client), and Umi (Metaplex). SDKs abstract low-level details like serialization, signing, and RPC communication.
Aliases: SDK
Related: Solana Web3.js, Solana Rust SDK (solana-sdk)
Glossary Copilot

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Concept graph

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Branch

Solana Web3.js

The official JavaScript/TypeScript SDK (@solana/web3.js v1) for building Solana clients. Provides classes: Connection (RPC), PublicKey, Keypair, Transaction, SystemProgram, and more. Used for sending transactions, querying accounts, and subscribing to events. v1 uses a class-based API; v2 (@solana/kit) uses a functional, tree-shakeable design.

Branch

Solana Rust SDK (solana-sdk)

The Rust crate (solana-sdk) providing types and utilities for building Solana clients and programs. For on-chain programs, use `solana-program` (no-std compatible subset). For off-chain clients, use `solana-sdk` (full features including keypair generation, transaction signing). The SDK includes types like Pubkey, Instruction, Transaction, and Account.

Next concepts to explore

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Developer Tools

Solana Web3.js

The official JavaScript/TypeScript SDK (@solana/web3.js v1) for building Solana clients. Provides classes: Connection (RPC), PublicKey, Keypair, Transaction, SystemProgram, and more. Used for sending transactions, querying accounts, and subscribing to events. v1 uses a class-based API; v2 (@solana/kit) uses a functional, tree-shakeable design.

Developer Tools

Solana Rust SDK (solana-sdk)

The Rust crate (solana-sdk) providing types and utilities for building Solana clients and programs. For on-chain programs, use `solana-program` (no-std compatible subset). For off-chain clients, use `solana-sdk` (full features including keypair generation, transaction signing). The SDK includes types like Pubkey, Instruction, Transaction, and Account.

Programming Fundamentals

State Machine Replication

Distributed computing pattern where identical copies of a state machine are maintained across multiple nodes. Each node processes the same sequence of inputs deterministically, producing identical outputs. Solana validators are state machines: given the same ledger of transactions, every validator produces the same account state.

Programming Fundamentals

Rust

A systems programming language emphasizing memory safety, zero-cost abstractions, and concurrency without a garbage collector. Rust uses an ownership model with borrow checking at compile time to prevent data races and null pointer bugs. It is the primary language for Solana program development (via Anchor or native solana-program crate) and the Agave validator client.

Related terms

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Developer Toolssolana-web3js

Solana Web3.js

The official JavaScript/TypeScript SDK (@solana/web3.js v1) for building Solana clients. Provides classes: Connection (RPC), PublicKey, Keypair, Transaction, SystemProgram, and more. Used for sending transactions, querying accounts, and subscribing to events. v1 uses a class-based API; v2 (@solana/kit) uses a functional, tree-shakeable design.

Developer Toolssolana-rust-sdk

Solana Rust SDK (solana-sdk)

The Rust crate (solana-sdk) providing types and utilities for building Solana clients and programs. For on-chain programs, use `solana-program` (no-std compatible subset). For off-chain clients, use `solana-sdk` (full features including keypair generation, transaction signing). The SDK includes types like Pubkey, Instruction, Transaction, and Account.

More in category

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Programming Fundamentals

Rust

A systems programming language emphasizing memory safety, zero-cost abstractions, and concurrency without a garbage collector. Rust uses an ownership model with borrow checking at compile time to prevent data races and null pointer bugs. It is the primary language for Solana program development (via Anchor or native solana-program crate) and the Agave validator client.

Programming Fundamentals

TypeScript

A statically typed superset of JavaScript that compiles to plain JavaScript. TypeScript adds type annotations, interfaces, generics, and enums to catch errors at compile time. It is the standard language for Solana client-side development—wallet adapters, dApp frontends, test suites, and SDK interactions (web3.js, Anchor client) are typically written in TypeScript.

Programming Fundamentals

JavaScript

The ubiquitous scripting language for web development, running in browsers and Node.js. JavaScript is dynamically typed and event-driven. Most Solana dApp frontends and scripts use JavaScript/TypeScript with libraries like @solana/web3.js. Node.js enables server-side JS for backend services, indexers, and bot development.

Programming Fundamentals

Node.js

A JavaScript runtime built on Chrome's V8 engine that enables server-side JavaScript execution. Node.js uses an event-driven, non-blocking I/O model. In the Solana ecosystem, Node.js is used for: running Anchor tests (Mocha/Jest), backend services, transaction bots, indexers, and CLI tools. npm/yarn/pnpm manage JavaScript package dependencies.