alextcn’s gists

alextcn / my-preferences.kt

Created December 13, 2017 08:52

Example of wrapping OnSharedPreferenceChangeListener in RxJava2 observable

	// package and imports


	@Singleton
	class MyPreferences
	@Inject constructor(val context: Context) {

	companion object {
	private const val PREF_FILE_NAME = "pg_cfg"

alextcn / Vibrator.kt

Created May 24, 2018 08:52

	package io.jackqack.hodler.utils

	import android.content.Context
	import android.os.Build
	import android.os.VibrationEffect
	import android.os.Vibrator

	object Vibrator {

	private const val VIBRATE_LENGTH_LONG_TOUCH = 50L

alextcn / EnterActionListener.kt

Created January 9, 2019 20:16

Listener for enter key input for EditText

	/**
	* Simple [TextView.OnEditorActionListener] implementation for handling IME action
	* @param onAction called when IME action selected or Enter is clicked
	*/
	class EnterActionListener(private val onAction: () -> Unit) : TextView.OnEditorActionListener {
	override fun onEditorAction(v: TextView?, actionId: Int, event: KeyEvent?): Boolean {
	// If triggered by an enter key, this is the event; otherwise, this is null.
	// if shift key is down, then we want to insert the '\n' char in the TextView;
	if (event == null \|\| event.isShiftPressed) return false

alextcn / SocketTcpClient.kt

Last active July 5, 2023 21:09

Main-safe Kotlin coroutine implementation of TCP client based on Okio

	import android.util.Log
	import kotlinx.coroutines.CoroutineScope
	import kotlinx.coroutines.Dispatchers
	import kotlinx.coroutines.cancel
	import kotlinx.coroutines.withContext
	import net.monetizemyapp.toolbox.extentions.toHexString
	import okio.*
	import java.net.Socket
	import javax.net.ssl.SSLSocketFactory

alextcn / ens-commit-register.ts

Created January 18, 2023 19:06

Commit and regsiter ENS domain on Goerli network

	import { ethers, Wallet } from 'ethers'


	// const ALCHEMY_URL = `https://eth-goerli.g.alchemy.com/v2/${process.env.NEXT_PUBLIC_ALCHEMY_API_KEY!}`
	const ETH_REGISTRAR_ADDRESS = '0x283Af0B28c62C092C9727F1Ee09c02CA627EB7F5' // goerli
	const ETH_REGISTRAR_ABI = [
	'function available(string) view returns (bool)',
	'function makeCommitment(string,address,bytes32) pure returns (bytes32)',
	'function commit(bytes32)',
	'function register(string,address,uint256,bytes32) payable',

alextcn / storage.ts

Created January 19, 2023 16:12

Proposal for typed local storage service

	import { useLocalStorage } from "usehooks-ts"
	import { RegistrationStep } from "../types"


	// Registrations map example
	// const registrations = {
	// 'xdomain1.eth': {
	// domain: 'xdomain1.eth',
	// name: 'xdomain1',
	// owner: '0x9C51161bA2FB02Cc0a403332B607117685f34831',

alextcn / Step.tsx

Created January 19, 2023 20:07

Dynamically computed step based on Registartion status in Storage

	import { MIN_COMMIT_TIME_S } from 'lib/constants'
	import { useRegistration } from 'lib/hooks/storage'
	import { RegistrationStatus } from 'lib/types'
	import { useSigner, useFeeData, useAccount } from 'wagmi'
	import { CommitmentForm } from './CommitmentForm'
	import { RegisterStep } from './RegisterStep'
	import { Success } from './Success'
	import { WaitMinute } from './WaitMinute'

	export const Step = ({

alextcn / ens-setfields-multicall.ts

Created January 25, 2023 18:36

Set multiple resolver records in a single transaction

	import { ethers } from 'ethers'
	import { namehash } from 'ethers/lib/utils.js'

	const ENS_RESOLVER_ADDRESS = '0x2800Ec5BAB9CE9226d19E0ad5BC607e3cfC4347E' // goerli
	const ENS_RESOLVER_ABI = [
	'function addr(bytes32 node) external view returns (address)',
	'function setAddr(bytes32 node, address a) external',
	'function text(bytes32 node, string calldata key) external view returns (string memory)',
	'function setText(bytes32 node, string calldata key, string calldata value) external',
	'function multicall(bytes[] calldata data) external returns(bytes[] memory results)'

Alex Tkachenko alextcn