solana_kit_codecs_data_structures 0.1.0

Struct, enum, tuple, and map codecs for the Solana Kit Dart SDK.

Changelog

All notable changes to this package will be documented in this file.

0.1.0 - 2026-02-21

Notes

• First 0.1.0 release of this package.

0.0.2 - 2026-02-21

Features

Implement codecs_strings and codecs_data_structures packages ported from the

TypeScript @solana/codecs-strings and @solana/codecs-data-structures.

codecs_strings (15 tests):

• UTF-8 codec using dart:convert with null character stripping
• Base16 (hex) codec with optimized nibble conversion
• Base58 codec using BigInt arithmetic for Solana address encoding
• Base64 codec tolerant of missing padding (matches Node.js behavior)
• Base10 codec for decimal string encoding
• Generic baseX codec for arbitrary alphabets
• BaseX reslice codec for power-of-2 bases using bit accumulator

codecs_data_structures (90 tests):

• Unit (void), boolean, and raw bytes codecs
• Array codec with prefix/fixed/remainder sizing (sealed ArrayLikeCodecSize)
• Tuple codec for heterogeneous fixed-length lists
• Struct codec using Map<String, Object?> for named fields
• Map and Set codecs built on array internals
• Nullable codec with configurable none representation (sealed NoneValue)
• Bit array codec with forward/backward bit ordering
• Constant, hidden prefix, and hidden suffix codecs
• Union, discriminated union, and literal union codecs

Initial scaffold for 18 core packages forming the foundation and middle layers of

the Solana Kit dependency graph. Each package has its pubspec.yaml with correct workspace dependencies, shared analysis_options.yaml, and an empty barrel export file ready for implementation.

Package groups scaffolded:

• Crypto & Identity: addresses (base58), keys (Ed25519), signers (interfaces)
• Codecs: core interfaces, numbers, strings, data structures, umbrella re-export
• Utilities: functional (pipe/compose), options (Rust-like Option codec), fast_stable_stringify, subscribable (reactive patterns)
• Transaction Building: instructions, instruction_plans, transaction_messages, transactions (compilation & signing)
• Other: offchain_messages, test_matchers

Fixes

Enhance core SDK packages with additional functionality and tests.

• Codecs core: Enhanced addCodecSizePrefix with additional functionality
• Codecs data structures: Array codec improvements
• Codecs numbers: shortU16 codec enhancements
• Codecs strings: UTF-8 codec improvements
• Keys: Key pair and signatures enhancements
• RPC transport: HTTP transport and WebSocket channel updates
• Transactions: Transaction codec enhancements