@nktkas/hyperliquid/esm/api/exchange/_methods/_base/_nonce.js

Hyperliquid API SDK for all major JS runtimes, written in TypeScript.

/**
 * Nonce manager for generating unique, monotonically increasing nonces.
 * @module
 */ /** Default upper bound on map size before stale entries are pruned. */ const DEFAULT_MAX_ENTRIES = 10_000;
/**
 * Creates a nonce manager that issues unique, monotonically increasing nonces per key.
 *
 * Uses `Date.now()` in ms; if the previous nonce for the key is greater than or equal to
 * `Date.now()`, increments by 1 to maintain monotonicity.
 *
 * To bound memory under high-cardinality workloads (e.g., a server proxying many wallets),
 * stale entries are pruned when the internal map grows beyond `maxEntries`. An entry is
 * considered stale if `Date.now()` has advanced past its last issued nonce.
 *
 * @param maxEntries Upper bound on map size before stale entries are pruned. Default: `10000`.
 * @return A {@linkcode NonceManager}.
 */ export function createNonceManager(maxEntries = DEFAULT_MAX_ENTRIES) {
  const map = new Map();
  return {
    getNonce (key) {
      const now = Date.now();
      if (map.size > maxEntries) {
        for (const [k, last] of map){
          if (now > last) map.delete(k);
        }
      }
      const last = map.get(key) ?? 0;
      const nonce = now > last ? now : last + 1;
      map.set(key, nonce);
      return nonce;
    }
  };
}
/** Default global nonce manager instance. */ export const globalNonceManager = /* @__PURE__ */ createNonceManager();
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