Matt Lockyer mattlockyer

## nondeterm-ecdsa-recovery.py
# references:
# https://ethereum.stackexchange.com/questions/114680/is-it-possible-to-use-non-deterministic-ecdsa-signatures-schemes-for-signing-eth
# https://eth-account.readthedocs.io/en/stable/eth_account.html#eth_account.account.Account.recover_message

from ecdsa import SigningKey, SECP256k1
from eth_account import Account
from eth_account.messages import encode_defunct, defunct_hash_message

message = encode_defunct(text="I♥SF")
mh = defunct_hash_message(text="I♥SF")

## steps.js
// go to https://near.github.io/seed-recovery/ and click the random button at the bottom
// copy publicKey AND seed phrase somewhere SAFE
// use the same tool to find the public key of an existing seed phrase OR call
near keys [accountId]

// once you have both public keys AND the new seed phrase SAFELY STORED
near add-key [accountId] [newPublicKey]
near delete-key [accountId] [oldPublicKey]

// Reference: https://www.npmjs.com/package/near-cli#near-add-key

## do.ts
const META_KEY: string = '_M'

export class Object {
	state: DurableObjectState
	meta: any
	data: any
	timeouts: any

	constructor(state: DurableObjectState, env: Env) {
		this.state = state;

## basics.js
// new near instance (for NodeJS use InMemoryKeyStore)

// do this once somewhere when app "mounts" or loads

const near = new Near({
    networkId,
    nodeUrl,
    walletUrl,
    deps: {
        keyStore: new keyStores.BrowserLocalStorageKeyStore()

## near-base64.js
// JS (node - for browser you need to use btoa(String.fromCharCode(...new Uint8Array(...)))

const hash = sha256.create();
const hashesBase64 = [
	'some string'
].map((src) => {
	return Buffer.from(hash.update(src).array()).toString('base64')
})


## sign-for-user.js
import * as nearAPI from 'near-api-js';

const {
	Account,
  KeyPair,
} = nearAPI;

// near is your current near connection instance (somewhere in your app init)

export const getAccessKeyAccount = (near, accountId, secretKey) => {

## sign-with-near-cli.js
// set the network (if you want mainnet)
export NEAR_ENV=mainnet
// choose 1 or 2
// 1. NEAR wallet login
near login
// 2. LEDGER replace ACCOUNT_ID
// change useLedgerKey value if you are using custom ledger path
near repl --accountId="ACCOUNT_ID" --useLedgerKey="44'/397'/0'/0'/1'"

// REPL

## index.html
Use square image or 1200x628

<head>
    <meta property="og:title" content="">
    <meta property="og:image" content="">
    <meta property="og:type" content="website">
    <meta name="twitter:card" content="summary_large_image">
    <meta name="twitter:site" content="@mattdlockyer">
    <meta name="twitter:creator" content="@mattdlockyer">
    <meta property="twitter:image:alt" content="">

## random.rs

// anywhere in your contract

fn random_u128() -> u128 {
    let random_seed = env::random_seed(); // len 32
    // using first 16 bytes (doesn't affect randomness)
    as_u128(random_seed.get(..16).unwrap())
}

fn as_u128(arr: &[u8]) -> u128 {

## console.js
modal = document.createElement('div')
modal.innerHTML = '<span id="close-modal">x</span>'
style = modal.style
modal.style.zIndex = 1000
modal.style.width = modal.style.height = '90%'
modal.style.background = 'white'
modal.style.position = 'absolute'
modal.style.top = modal.style.left = '5%'
modal.style.padding = '16px'
document.body.appendChild(modal)
	# references:
	# https://ethereum.stackexchange.com/questions/114680/is-it-possible-to-use-non-deterministic-ecdsa-signatures-schemes-for-signing-eth
	# https://eth-account.readthedocs.io/en/stable/eth_account.html#eth_account.account.Account.recover_message

	from ecdsa import SigningKey, SECP256k1
	from eth_account import Account
	from eth_account.messages import encode_defunct, defunct_hash_message

	message = encode_defunct(text="I♥SF")
	mh = defunct_hash_message(text="I♥SF")
	// go to https://near.github.io/seed-recovery/ and click the random button at the bottom
	// copy publicKey AND seed phrase somewhere SAFE
	// use the same tool to find the public key of an existing seed phrase OR call
	near keys [accountId]

	// once you have both public keys AND the new seed phrase SAFELY STORED
	near add-key [accountId] [newPublicKey]
	near delete-key [accountId] [oldPublicKey]

	// Reference: https://www.npmjs.com/package/near-cli#near-add-key
	const META_KEY: string = '_M'

	export class Object {
	state: DurableObjectState
	meta: any
	data: any
	timeouts: any

	constructor(state: DurableObjectState, env: Env) {
	this.state = state;
	// new near instance (for NodeJS use InMemoryKeyStore)

	// do this once somewhere when app "mounts" or loads

	const near = new Near({
	networkId,
	nodeUrl,
	walletUrl,
	deps: {
	keyStore: new keyStores.BrowserLocalStorageKeyStore()
	// JS (node - for browser you need to use btoa(String.fromCharCode(...new Uint8Array(...)))

	const hash = sha256.create();
	const hashesBase64 = [
	'some string'
	].map((src) => {
	return Buffer.from(hash.update(src).array()).toString('base64')
	})
	import * as nearAPI from 'near-api-js';

	const {
	Account,
	KeyPair,
	} = nearAPI;

	// near is your current near connection instance (somewhere in your app init)

	export const getAccessKeyAccount = (near, accountId, secretKey) => {
	// set the network (if you want mainnet)
	export NEAR_ENV=mainnet
	// choose 1 or 2
	// 1. NEAR wallet login
	near login
	// 2. LEDGER replace ACCOUNT_ID
	// change useLedgerKey value if you are using custom ledger path
	near repl --accountId="ACCOUNT_ID" --useLedgerKey="44'/397'/0'/0'/1'"

	// REPL
	Use square image or 1200x628

	<head>
	<meta property="og:title" content="">
	<meta property="og:image" content="">
	<meta property="og:type" content="website">
	<meta name="twitter:card" content="summary_large_image">
	<meta name="twitter:site" content="@mattdlockyer">
	<meta name="twitter:creator" content="@mattdlockyer">
	<meta property="twitter:image:alt" content="">

	// anywhere in your contract

	fn random_u128() -> u128 {
	let random_seed = env::random_seed(); // len 32
	// using first 16 bytes (doesn't affect randomness)
	as_u128(random_seed.get(..16).unwrap())
	}

	fn as_u128(arr: &[u8]) -> u128 {
	modal = document.createElement('div')
	modal.innerHTML = '<span id="close-modal">x</span>'
	style = modal.style
	modal.style.zIndex = 1000
	modal.style.width = modal.style.height = '90%'
	modal.style.background = 'white'
	modal.style.position = 'absolute'
	modal.style.top = modal.style.left = '5%'
	modal.style.padding = '16px'
	document.body.appendChild(modal)