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ES and SQL as a smart contract enginge

This is a simple example of a smart contract written in ECMAScript which uses SQL database for storing the state.

class Engine {
  constructor(db, contracts) {
    this.db = db
    this.contracts = contracts
  }

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Steps

1. Do the first step.
2. Do the second step.
3. Do the third step.

✅ 1. Do the first step

Do the first step actions.

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plant.use(async ({req, res}) => {
  const body = await req.json() 

  res.json(body)
})

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import {app} from 'electron'
import {createServer} from '@plant/electron'
import Plant from '@plant/plant'

app.on('ready', () => {
  // Define simple Plant server
  const plant = new Plant()

  plant.use(({res}) => {
    res.text('OK')

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export function decodeJson64(value) {
  return JSON.parse(
    Buffer.from(value, 'base64')
  )
}

export function encodeJson64(value) {
  return Buffer.from(
    JSON.stringify(value), 'utf8'
  )

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/**
 * Split string by delimiter limited times. By default 1.
 *
 * @example
 * split(':', 'user:id:1') -> ['user', 'id:1']
 * split(':', 'user:id:1:login:admin', 2) -> ['user', 'id' , '1:login:admin']
 * split(':', 'hello') -> ['hello']
 */
export function split(delim, str, count = 1) {
  if (count < 1) {

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * RLP Encoding based on: https://github.com/ethereum/wiki/wiki/%5BEnglish%5D-RLP
 * This function takes in a data, convert it to buffer if not, and a length for recursion
 * @param input - will be converted to buffer
 * @returns returns buffer of encoded data
 **/
function encode(input) {
    if (Array.isArray(input)) {

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/*
    Source: https://mariusschulz.com
*/

.token.cdata,.token.comment,.token.doctype,.token.prolog {
    color: #a0a1a7;
    font-style: italic
}

.token.boolean {

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// Got from https://github.com/NodeGuy/Deterministic.js

function createRandomizer() {
  let s0, s1, s2, c;

  s0 = 0.8725217853207141;
  s1 = 0.520505596883595;
  s2 = 0.22893249243497849;
  c = 1;

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/* chacha20 - 256 bits */

// Written in 2014 by Devi Mandiri. Public domain.
//
// Implementation derived from chacha-ref.c version 20080118
// See for details: http://cr.yp.to/chacha/chacha-20080128.pdf

function U8TO32_LE(x, i) {
  return x[i] | (x[i+1]<<8) | (x[i+2]<<16) | (x[i+3]<<24);
}