Symbol Converter

Utility for converting human-readable asset symbols to Hyperliquid asset IDs.

Hyperliquid uses numeric asset IDs internally:

• Perpetuals: 0, 1, 2, ... (index in meta.universe)

• Spot: 10000 + index (e.g., 10107 for HYPE/USDC)

• Builder DEX: 100000 + dex_index * 10000 + asset_index

See Asset IDs in Hyperliquid docs.

Import

import { SymbolConverter } from "@nktkas/hyperliquid/utils";

Usage

import { HttpTransport } from "@nktkas/hyperliquid";
import { SymbolConverter } from "@nktkas/hyperliquid/utils";

const transport = new HttpTransport();
const converter = await SymbolConverter.create({ transport });

// Perpetual
converter.getAssetId("BTC"); // 0
converter.getSzDecimals("BTC"); // 5

// Spot market (BASE/QUOTE format)
converter.getAssetId("HYPE/USDC"); // 10107
converter.getSzDecimals("HYPE/USDC"); // 2
converter.getSpotPairId("HYPE/USDC"); // "@107"

With Builder DEX

Builder DEX assets require explicit opt-in:

// Load specific dexs
const converter = await SymbolConverter.create({
  transport,
  dexs: ["test"], // load only "test" dex
});

// Or load all dexs
const converter = await SymbolConverter.create({
  transport,
  dexs: true, // load all available dexs
});

converter.getAssetId("test:ABC"); // 110000

Methods

getAssetId

Returns the numeric asset ID for use in exchange requests.

converter.getAssetId("BTC"); // 0 (perpetual)
converter.getAssetId("HYPE/USDC"); // 10107 (spot)
converter.getAssetId("test:ABC"); // 110000 (builder dex)
converter.getAssetId("UNKNOWN"); // undefined

getSzDecimals

Returns the size decimals for an asset. Used for formatting order sizes and prices.

converter.getSzDecimals("BTC"); // 5 → size like "0.00001"
converter.getSzDecimals("HYPE/USDC"); // 2 → size like "0.01"

getSpotPairId

Returns the spot pair ID for info endpoints and subscriptions (l2Book, trades, etc.).

converter.getSpotPairId("HYPE/USDC"); // "@107"
converter.getSpotPairId("PURR/USDC"); // "PURR/USDC" (special case)

reload

Refreshes asset mappings from the API. Useful when new assets are listed.

await converter.reload();

Parameters

transport (required)

• Type: HttpTransport | WebSocketTransport

Transport instance for API requests.

dexs (optional)

• Type: string[] | boolean

• Default: false

Builder DEX support:

• false or omitted - don't load builder dexs

• true - load all available dexs

• ["dex1", "dex2"] - load only specified dexs

// Don't load dexs (default)
await SymbolConverter.create({ transport });

// Load all dexs
await SymbolConverter.create({ transport, dexs: true });

// Load specific dexs
await SymbolConverter.create({ transport, dexs: ["test"] });