TypeScript SDK

The TypeScript SDK is a viem-style client for the Dango execution environment. It speaks GraphQL over HTTP and WebSocket to a Dango indexer, signs transactions with EIP-712 typed data, and ships as six packages: @left-curve/sdk, @left-curve/crypto, @left-curve/encoding, @left-curve/types, @left-curve/utils, and @left-curve/config.

Start here

• Installation — install the SDK and its peer requirements
• First Call — five-minute hello world against testnet
• Project Setup — networks, signers, env vars

Concepts

• Packages — what lives in which package, and when to reach for a sub-package
• Clients — createPublicClient vs createSignerClient
• Signers & Authentication — PrivateKeySigner, session signers, passkeys
• Transactions — sign, broadcast, poll
• Subscriptions — the WebSocket model
• Encoding & Types — base units, Decimal, bigint
• Error Handling — BaseError hierarchy
• Rate Limits & Quotas — 167 reqs / 10s, 30 subs / WS

API Reference

• Clients: createPublicClient, createSignerClient, createBaseClient
• Actions, grouped by domain: App, DEX, Perps, Account Factory, Gateway, Indexer, Oracle, Hyperlane
• Types — major user-facing types
• Errors — BaseError and friends