product-sdk

End-to-end scaffolding and implementation of Polkadot applications using @parity/product-sdk packages. Use when: creating a new Polkadot project, building a dApp, scaffolding chain interactions, choosing which @parity/product-sdk packages to install, or when a user says "build me a Polkadot app". Handles both developer-guided and fully autonomous (non-developer) workflows.

Use when publishing or subscribing to ephemeral messages on the Polkadot Statement Store. Covers StatementStoreClient lifecycle, two connection modes (host and local), topic/channel creation, ChannelStore last-write-wins semantics, data size limits, and StatementTransport BYOD.

Use when connecting to Polkadot chains, querying chain state, subscribing to storage, working with typed APIs, or choosing between preset and BYOD paths. Covers @parity/product-sdk-chain-client and @parity/product-sdk-descriptors.

Use when uploading or retrieving data via Cloud Storage, working with CID-based decentralized storage, IPFS gateway access, or the CloudStorageClient SDK. Covers upload, batch upload, fetch, query, CID computation, and gateway utilities.

Use when interacting with smart contracts (PolkaVM/Solidity) on Asset Hub, using ContractManager with cdm.json manifests, createContract for ad-hoc contracts, ContractRuntime creation, or contract type codegen. Covers @parity/product-sdk-contracts.