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Marking accounts as mutable so state changes are persisted during instruction execution.
Distinct from Mutability Modifiers: Distinct from Mutability Modifiers: applies to on-chain account state, not language variables.
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Anchor is a framework for building, testing, and deploying Solana smart contracts. It provides a Rust domain-specific language (DSL) that uses macro‑based instruction dispatch and derive‑macro account validation to automate ownership checks, discriminator enforcement, and serialization before instruction execution. The framework also includes a CLI toolchain for scaffolding, compiling, and managing contracts across workspaces, a test harness that simulates program execution with account manipulation and compute unit benchmarking, and an IDL generator that emits a standardized JSON interface fr
Enables saving state changes to Solana accounts by declaring them mutable.