The property where performing an operation multiple times produces the same result as performing it once. Critical in blockchain development because transactions can be submitted multiple times (e.g., during retries). Solana mitigates duplicate execution via recent blockhash expiry (~60-90 seconds) and transaction deduplication. Designing idempotent instructions prevents double-spending.
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The property where performing an operation multiple times produces the same result as performing it once. Critical in blockchain development because transactions can be submitted multiple times (e.g., during retries). Solana mitigates duplicate execution via recent blockhash expiry (~60-90 seconds) and transaction deduplication. Designing idempotent instructions prevents double-spending.
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Idempotency (idempotency) Category: Programming Fundamentals Definition: The property where performing an operation multiple times produces the same result as performing it once. Critical in blockchain development because transactions can be submitted multiple times (e.g., during retries). Solana mitigates duplicate execution via recent blockhash expiry (~60-90 seconds) and transaction deduplication. Designing idempotent instructions prevents double-spending. Related: Transaction, Nonce Account
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An atomic unit of execution containing one or more instructions, a recent blockhash, and one or more signatures. All instructions in a transaction execute sequentially and atomically—if any instruction fails, the entire transaction reverts. Transactions have a 1,232-byte size limit (matching IPv6 MTU) and a default 200,000 CU budget.
A special account managed by the System Program that stores a durable nonce value, enabling transactions with extended or indefinite lifetimes. Normally, transactions reference a recent blockhash and expire after ~60-90 seconds. Nonce accounts replace the blockhash with a stored nonce that remains valid until explicitly advanced, enabling offline signing workflows, scheduled transactions, and custodial operations where signing and submission happen at different times.
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An atomic unit of execution containing one or more instructions, a recent blockhash, and one or more signatures. All instructions in a transaction execute sequentially and atomically—if any instruction fails, the entire transaction reverts. Transactions have a 1,232-byte size limit (matching IPv6 MTU) and a default 200,000 CU budget.
A special account managed by the System Program that stores a durable nonce value, enabling transactions with extended or indefinite lifetimes. Normally, transactions reference a recent blockhash and expire after ~60-90 seconds. Nonce accounts replace the blockhash with a stored nonce that remains valid until explicitly advanced, enabling offline signing workflows, scheduled transactions, and custodial operations where signing and submission happen at different times.
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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.
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.
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.
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.