API — HCS‑12

HCS‑12 provides a full framework for HashLinks, assemblies, block rendering, and WASM‑powered interactions.

Node Client — HCS12Client

• Purpose: High‑level operations around registries, assemblies, and rendering contexts.
• Source: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/sdk.ts

Highlights

• Registry helpers (create/list/register)
• Assembly helpers (register/update/add block/add action)
• Render context orchestration for frontends

Base Client — HCS12BaseClient

• Purpose: Shared logic (memos, mirror queries, validation hooks).
• Source: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/base-client.ts

Browser Client — HCS12BrowserClient

• Purpose: Wallet‑based flows using a DApp signer; mirrors Node client capabilities for the browser.
• Source: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/browser.ts

Transactions (Builders)

• Purpose: Canonical Hedera transactions for registries and assembly operations.
• Source: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/tx.ts

Includes

• buildHcs12CreateRegistryTopicTx
• buildHcs12SubmitMessageTx
• buildHcs12RegisterAssemblyTx
• buildHcs12AddBlockToAssemblyTx
• buildHcs12AddActionToAssemblyTx
• buildHcs12UpdateAssemblyTx

Assemblies, Rendering, Validation, WASM

• Assemblies: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/assembly
• Rendering: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/rendering
• Validation: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/validation
• WASM: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/wasm

Types and Constants

• Types: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/types.ts
• Constants: https://github.com/hashgraph-online/standards-sdk/tree/main/src/hcs-12/constants.ts