Dango Rust SDK

The Rust SDK is a thin GraphQL + REST client over a Dango node, plus key-management and transaction-signing utilities.

It exposes:

• HttpClient — queries (query_app, query_store, simulate, query_block, …), tx broadcast, and macro-generated paginators for indexer connections.
• WsClient and Session — GraphQL subscriptions over graphql-transport-ws.
• SingleSigner — typestate signer for Dango single-signature accounts.
• Secret trait with Secp256k1 and Eip712 implementations, and Keystore for AES-256-GCM at-rest encryption.

The SDK is a thin transport: there are no Dango action helpers. Transactions are composed by building Messages (re-exported by the SDK) and passing them to the signer.

Start here

• Installation — add dango-sdk to a Cargo project.
• First call — query the chain status with HttpClient.
• Project setup — endpoints, keys, env vars, runtime.

Concepts

• Clients — when to reach for HttpClient vs WsClient.
• Signers and authentication — the Secret trait and SingleSigner.
• Transactions — compose, sign, broadcast.
• Subscriptions — multiplexed Session vs dedicated WsClient::subscribe.
• Encoding and types — base units, Addr, Hash256, codegen response types.
• Error handling — anyhow::Error everywhere except subscription items, which surface WsError.
• Rate limits and quotas — server-side limits and how to shape the client around them.