hung hcheng826

hcheng826 / compute_twap.py

Created November 10, 2025 03:10

Script to compute TWAP (Time Weighted Average Price) from Pyth Network price data.

	#!/usr/bin/env python3
	"""
	Script to compute TWAP (Time Weighted Average Price) from Pyth Network price data.
	Queries prices for Nov 7 0:00 UTC and 29 days before it, then calculates simple average.
	"""

	import urllib.request
	import urllib.parse
	import urllib.error
	import json

hcheng826 / [email protected]@v4.0.0...access...Ownable.sol

Created August 17, 2024 09:43

Created using tron-ide: Realtime Tron Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at http://tronide.io/#version=soljson_v0.8.6+commit.0e36fba.js&optimize=false&runs=200&gist=

	// SPDX-License-Identifier: MIT

	pragma solidity ^0.8.0;

	import "../utils/Context.sol";
	/**
	* @dev Contract module which provides a basic access control mechanism, where
	* there is an account (an owner) that can be granted exclusive access to
	* specific functions.
	*

hcheng826 / contracts...test.sol

Created March 7, 2024 09:15

Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.8.24+commit.e11b9ed9.js&optimize=false&runs=200&gist=

	// SPDX-License-Identifier: GPL-3.0
	pragma solidity ^0.8.17;

	import "@openzeppelin/contracts/utils/cryptography/EIP712.sol";

	contract Test is EIP712 {
	constructor() EIP712("native pool", "1") {}

	bytes32 private constant ORDER_SIGNATURE_HASH = 0xcdd3cf1659a8da07564b163a4df90f66944547e93f0bb61ba676c459a2db4e20;

hcheng826 / getAddressFromPubKey.js

Created December 11, 2022 14:39

	const ethers = require("ethers");

	exports.y_sum_s = [
	2, 105, 56, 31, 30, 34, 155, 165, 65, 238, 163, 12, 224, 138, 193, 138, 163,
	33, 108, 184, 199, 29, 146, 179, 134, 203, 218, 180, 48, 140, 69, 88, 38,
	];

	console.log(
	"address: ",
	ethers.utils.computeAddress("0x" + Buffer.from(y_sum_s).toString("hex"))

hcheng826 / verifyEcdsa.js

Last active December 8, 2022 07:00

	let elliptic = require("elliptic");
	let sha3 = require("js-sha3");
	let ec = new elliptic.ec("secp256k1");

	const y_sum_s = [
	2, 105, 56, 31, 30, 34, 155, 165, 65, 238, 163, 12, 224, 138, 193, 138, 163,
	33, 108, 184, 199, 29, 146, 179, 134, 203, 218, 180, 48, 140, 69, 88, 38,
	];

	const compressed = Buffer.from(y_sum).toString("hex");