@nktkas/hyperliquid
Version:
Unofficial Hyperliquid API SDK for all major JS runtimes, written in TypeScript and provided with tests
68 lines (67 loc) • 2.45 kB
JavaScript
// Copyright 2018-2025 the Deno authors. MIT license.
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define(["require", "exports"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.rAlphabet = exports.alphabet = void 0;
exports.calcSizeHex = calcSizeHex;
exports.encode = encode;
exports.decode = decode;
exports.alphabet = new TextEncoder().encode("0123456789abcdef");
exports.rAlphabet = new Uint8Array(128).fill(16); // alphabet.Hex.length
exports.alphabet.forEach((byte, i) => exports.rAlphabet[byte] = i);
new TextEncoder()
.encode("ABCDEF")
.forEach((byte, i) => exports.rAlphabet[byte] = i + 10);
/**
* Calculate the output size needed to encode a given input size for
* {@linkcode encodeIntoHex}.
*
* @param originalSize The size of the input buffer.
* @returns The size of the output buffer.
*
* @example Basic Usage
* ```ts
* import { assertEquals } from "@std/assert";
* import { calcSizeHex } from "@std/encoding/unstable-hex";
*
* assertEquals(calcSizeHex(1), 2);
* ```
*/
function calcSizeHex(originalSize) {
return originalSize * 2;
}
function encode(buffer, i, o, alphabet) {
for (; i < buffer.length; ++i) {
const x = buffer[i];
buffer[o++] = alphabet[x >> 4];
buffer[o++] = alphabet[x & 0xF];
}
return o;
}
function decode(buffer, i, o, alphabet) {
if ((buffer.length - o) % 2 === 1) {
throw new RangeError(`Cannot decode input as hex: Length (${buffer.length - o}) must be divisible by 2`);
}
i += 1;
for (; i < buffer.length; i += 2) {
buffer[o++] = (getByte(buffer[i - 1], alphabet) << 4) |
getByte(buffer[i], alphabet);
}
return o;
}
function getByte(char, alphabet) {
const byte = alphabet[char] ?? 16;
if (byte === 16) { // alphabet.Hex.length
throw new TypeError(`Cannot decode input as hex: Invalid character (${String.fromCharCode(char)})`);
}
return byte;
}
});