TypeScript toolkit for Lighter (zkLighter and robinhoodchain): REST reads, exact order ids above 2^53, the 40/60 s write window, pending-write memory, a signer client and the Python SDK signer itself.
Lighter is a perp DEX built as a zk-rollup with two independent deployments: zkLighter mainnet and an instance on robinhoodchain, each with its own markets and accounts. Orders are signed with a non-EVM key through the official Python SDK, and the order list lags the rollup by a few seconds, so fills are confirmed from the position delta.