feat: add block_propagation_delay table

app/models/block_propagation_delay.rb

@@ -0,0 +1,18 @@
+class BlockPropagationDelay < ApplicationRecord
+end
+
+# == Schema Information
+#
+# Table name: block_propagation_delays
+#
+#  id                       :bigint           not null, primary key
+#  block_hash               :string
+#  created_at_unixtimestamp :integer
+#  durations                :jsonb
+#  created_at               :datetime         not null
+#  updated_at               :datetime         not null
+#
+# Indexes
+#
+#  index_block_propagation_delays_on_created_at_unixtimestamp  (created_at_unixtimestamp)
+#

db/migrate/20200509144539_create_block_propagation_delays.rb

@@ -0,0 +1,11 @@
+class CreateBlockPropagationDelays < ActiveRecord::Migration[6.0]
+  def change
+    create_table :block_propagation_delays do |t|
+      t.string :block_hash
+      t.integer :created_at_unixtimestamp, index: true
+      t.jsonb :durations
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_05_06_043401) do
+ActiveRecord::Schema.define(version: 2020_05_09_144539) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -43,6 +43,15 @@
     t.index ["lock_hash"], name: "index_addresses_on_lock_hash", unique: true
   end
 
+  create_table "block_propagation_delays", force: :cascade do |t|
+    t.string "block_hash"
+    t.integer "created_at_unixtimestamp"
+    t.jsonb "durations"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["created_at_unixtimestamp"], name: "index_block_propagation_delays_on_created_at_unixtimestamp"
+  end
+
   create_table "block_statistics", force: :cascade do |t|
     t.string "difficulty"
     t.string "hash_rate"