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<div class="field-unit__label">
  <%= f.label field.attribute %>
</div>
<div class="field-unit__field">
  <%= f.hidden_field field.attribute, id: field.attribute %>
  <trix-editor input="<%= field.attribute %>"></trix-editor>
</div>

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has_one_attached :image

validate :image_type

private

def image_type
   if image.attached? == false
     errors.add(:image, "is missing!")
   end

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test:
  service: Disk
  root: <%= Rails.root.join("tmp/storage") %>

local:
  service: Disk
  root: <%= Rails.root.join("storage") %>

# Use rails credentials:edit to set the AWS secrets (as aws:access_key_id|secret_access_key)
# amazon:

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<div class="field">
  <%= form.label :image %>
  <%= form.file_field :image %>
</div>

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# This migration comes from active_storage (originally 20170806125915)
class CreateActiveStorageTables < ActiveRecord::Migration[5.2]
  def change
    create_table :active_storage_blobs do |t|
      t.string   :key,        null: false
      t.string   :filename,   null: false
      t.string   :content_type
      t.text     :metadata
      t.bigint   :byte_size,  null: false
      t.string   :checksum,   null: false

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require 'iota'

# With remote PoW
client = IOTA::Client.new(provider: 'https://node.iota-tangle.io:14265')
# If you use `client.api.attachToTangle` api here, you'll get error saying that attachToTangle command is not allowed

# With local pow
client = IOTA::Client.new(provider: 'https://node.iota-tangle.io:14265', local_pow: true)
# Now you can use `client.api.attachToTangle` api, which will do the proof-of-work on transaction and return the trytes that needs to be broadcasted

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const converter = require('@iota/converter')

converter.trytesToAscii(transaction.signatureMessageFragment)

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async function verifyData(data) {

    // return false if the object has no signature
    if (!data.sig) {
        return false;
    }
    else {

        // save the signature and delite it from the object
        const signature = data.sig;

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async function signData(data) {
    
    // deletes old sig attribute, if existing
    delete data.sig;
    
    // convert obj to json
    const json = JSON.stringify(data);
    
    // load file with private key 
    const file = await util.promisify(fs.readFile)(path.join(privKeyFile));

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import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
import SendButton from './components/SendButton'
import IOTA from 'iota.lib.js'


class App extends Component {

  constructor(props) {