--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,280 @@
+
+# Created by https://www.toptal.com/developers/gitignore/api/macos,python,pycharm
+# Edit at https://www.toptal.com/developers/gitignore?templates=macos,python,pycharm
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### PyCharm ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### PyCharm Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+# https://plugins.jetbrains.com/plugin/7973-sonarlint
+.idea/**/sonarlint/
+
+# SonarQube Plugin
+# https://plugins.jetbrains.com/plugin/7238-sonarqube-community-plugin
+.idea/**/sonarIssues.xml
+
+# Markdown Navigator plugin
+# https://plugins.jetbrains.com/plugin/7896-markdown-navigator-enhanced
+.idea/**/markdown-navigator.xml
+.idea/**/markdown-navigator-enh.xml
+.idea/**/markdown-navigator/
+
+# Cache file creation bug
+# See https://youtrack.jetbrains.com/issue/JBR-2257
+.idea/$CACHE_FILE$
+
+# CodeStream plugin
+# https://plugins.jetbrains.com/plugin/12206-codestream
+.idea/codestream.xml
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# End of https://www.toptal.com/developers/gitignore/api/macos,python,pycharm
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.idea/.gitignore	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Zeppelin ignored files
+/ZeppelinRemoteNotebooks/

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.idea/inspectionProfiles/Project_Default.xml	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,38 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="PyArgumentEqualDefaultInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="PyAugmentAssignmentInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="PyBehaveInspection" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="PyClassicStyleClassInspection" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="PyCompatibilityInspection" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ourVersions">
+        <value>
+          <list size="2">
+            <item index="0" class="java.lang.String" itemvalue="2.7" />
+            <item index="1" class="java.lang.String" itemvalue="3.10" />
+          </list>
+        </value>
+      </option>
+    </inspection_tool>
+    <inspection_tool class="PyMandatoryEncodingInspection" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="PyMissingTypeHintsInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="PyPackageRequirementsInspection" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ignoredPackages">
+        <value>
+          <list size="1">
+            <item index="0" class="java.lang.String" itemvalue="httpretty" />
+          </list>
+        </value>
+      </option>
+    </inspection_tool>
+    <inspection_tool class="PyUnresolvedReferencesInspection" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ignoredIdentifiers">
+        <list>
+          <option value="src.handlers.sentiment.secrets_controller" />
+          <option value="flask.Flask" />
+        </list>
+      </option>
+    </inspection_tool>
+  </profile>
+</component>
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.idea/inspectionProfiles/profiles_settings.xml	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.idea/misc.xml	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.8 (puppy)" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.idea/modules.xml	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/puppy.iml" filepath="$PROJECT_DIR$/.idea/puppy.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.idea/puppy.iml	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/venv" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.idea/vcs.xml	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GitSharedSettings">
+    <option name="FORCE_PUSH_PROHIBITED_PATTERNS">
+      <list>
+        <option value="main" />
+      </list>
+    </option>
+  </component>
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.py	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,10 @@
+from src.block import read_block
+
+
+def main():
+    with open('/Users/dennis/Bitcoin/blocks/blk00000.dat', 'rb') as file:
+        read_block(file)
+
+
+if __name__ == '__main__':
+    main()

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/block.py	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,48 @@
+import hashlib
+from src.helpers import read_bytes
+
+
+class Block:
+    """
+    Block structure
+    """
+
+    block_hash = None
+    magic_number = None
+    size = None
+
+    def __init__(self):
+        # Init BlockHeader class
+        self.header = self.Header()
+
+    class Header:
+        version = None
+        previous_block_hash = None
+        merkle_root = None
+        timestamp = None
+        difficult_target = None
+        nonce = None
+
+
+def read_block(file):
+    """
+    Deserialize block
+    :param file: <class '_io.BufferedReader'>, required
+    :return:
+    """
+
+    block = Block()
+    block.magic_number = int(read_bytes(file, 4), 16)
+    block.size = int(read_bytes(file, 4), 16)
+
+    # Compute block hash
+    header_bytes = file.read(80)
+    block_hash = hashlib.sha256(header_bytes).digest()
+    block_hash = hashlib.sha256(block_hash).digest()
+
+    # Read block header
+    header = block.Header()
+    header.block_hash = block_hash[::-1].hex()
+    header.version = int.from_bytes(header_bytes[:4], 'little')
+    header.previous_block_hash = header_bytes[4:32].hex()
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helpers.py	Thu Oct 14 21:42:10 2021 +0200
@@ -0,0 +1,18 @@
+def read_bytes(file, number_of_bytes, bytes_order='backward'):
+    """
+    Read bytes from buffer
+    :param file: <class '_io.BufferedReader'>, required
+    :param number_of_bytes: int, required
+    :param bytes_order: string, 'backward' or 'forward', required
+    :return: string
+    """
+
+    # More info about bytes order: https://en.wikipedia.org/wiki/Endianness
+
+    b = file.read(number_of_bytes)
+    if bytes_order == 'backward':
+        b = b[::-1]
+
+    b = b.hex().upper()
+
+    return b