base.py

"""
Base settings to build other settings files upon.
"""

from pathlib import Path

import environ
from corsheaders.defaults import default_headers as default_cors_headers

ROOT_DIR = Path(__file__).resolve(strict=True).parent.parent.parent
APPS_DIR = ROOT_DIR / "safe_transaction_service"

env = environ.Env()

READ_DOT_ENV_FILE = env.bool("DJANGO_READ_DOT_ENV_FILE", default=False)
DOT_ENV_FILE = env("DJANGO_DOT_ENV_FILE", default=None)
if READ_DOT_ENV_FILE or DOT_ENV_FILE:
    DOT_ENV_FILE = DOT_ENV_FILE or ".env"
    # OS environment variables take precedence over variables from .env
    env.read_env(str(ROOT_DIR / DOT_ENV_FILE))

# GENERAL
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#debug
DEBUG = env.bool("DEBUG", False)
# Local time zone. Choices are
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# though not all of them may be available with every OS.
# In Windows, this must be set to your system time zone.
TIME_ZONE = "UTC"
# https://docs.djangoproject.com/en/dev/ref/settings/#language-code
LANGUAGE_CODE = "en-us"
# https://docs.djangoproject.com/en/dev/ref/settings/#site-id
SITE_ID = 1
# https://docs.djangoproject.com/en/dev/ref/settings/#use-i18n
USE_I18N = True
# https://docs.djangoproject.com/en/dev/ref/settings/#use-l10n
USE_L10N = True
# https://docs.djangoproject.com/en/dev/ref/settings/#use-tz
USE_TZ = True
# https://docs.djangoproject.com/en/3.2/ref/settings/#force-script-name
FORCE_SCRIPT_NAME = env("FORCE_SCRIPT_NAME", default=None)

# DATABASES
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#databases
DATABASES = {
    "default": env.db("DATABASE_URL"),
}
DATABASES["default"]["ATOMIC_REQUESTS"] = False
DATABASES["default"]["ENGINE"] = "django_db_geventpool.backends.postgresql_psycopg2"
DATABASES["default"]["CONN_MAX_AGE"] = 0
DB_MAX_CONNS = env.int("DB_MAX_CONNS", default=50)
DATABASES["default"]["OPTIONS"] = {
    # https://github.com/jneight/django-db-geventpool#settings
    "MAX_CONNS": DB_MAX_CONNS,
    "REUSE_CONNS": env.int("DB_REUSE_CONNS", default=DB_MAX_CONNS),
}

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

# URLS
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#root-urlconf
ROOT_URLCONF = "config.urls"
# https://docs.djangoproject.com/en/dev/ref/settings/#wsgi-application
WSGI_APPLICATION = "config.wsgi.application"

# APPS
# ------------------------------------------------------------------------------
DJANGO_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.sites",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    # 'django.contrib.humanize', # Handy template tags
]
THIRD_PARTY_APPS = [
    "corsheaders",
    "rest_framework",
    "drf_yasg",
    "django_s3_storage",
    "rest_framework.authtoken",
]
LOCAL_APPS = [
    "safe_transaction_service.contracts.apps.ContractsConfig",
    "safe_transaction_service.history.apps.HistoryConfig",
    "safe_transaction_service.notifications.apps.NotificationsConfig",
    "safe_transaction_service.tokens.apps.TokensConfig",
]
# https://docs.djangoproject.com/en/dev/ref/settings/#installed-apps
INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + LOCAL_APPS

# MIDDLEWARE
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#middleware
MIDDLEWARE = [
    "safe_transaction_service.utils.loggers.LoggingMiddleware",
    "corsheaders.middleware.CorsMiddleware",
    "django.middleware.security.SecurityMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.http.ConditionalGetMiddleware",
    "django.middleware.common.CommonMiddleware",
    # 'django.middleware.csrf.CsrfViewMiddleware',
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
]

# STATIC
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#static-root
STATIC_ROOT = str(ROOT_DIR / "staticfiles")

# https://docs.djangoproject.com/en/dev/ref/settings/#static-url
STATIC_URL = "static/"
# https://docs.djangoproject.com/en/dev/ref/contrib/staticfiles/#std:setting-STATICFILES_DIRS
STATICFILES_DIRS = [
    str(APPS_DIR / "static"),
]
# https://docs.djangoproject.com/en/dev/ref/contrib/staticfiles/#staticfiles-finders
STATICFILES_FINDERS = [
    "django.contrib.staticfiles.finders.FileSystemFinder",
    "django.contrib.staticfiles.finders.AppDirectoriesFinder",
]

# MEDIA
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#media-root
MEDIA_ROOT = str(APPS_DIR / "media")
# https://docs.djangoproject.com/en/dev/ref/settings/#media-url
MEDIA_URL = "/media/"

# TEMPLATES
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#templates
TEMPLATES = [
    {
        # https://docs.djangoproject.com/en/dev/ref/settings/#std:setting-TEMPLATES-BACKEND
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        # https://docs.djangoproject.com/en/dev/ref/settings/#template-dirs
        "DIRS": [
            str(APPS_DIR / "templates"),
        ],
        "OPTIONS": {
            # https://docs.djangoproject.com/en/dev/ref/settings/#template-debug
            "debug": DEBUG,
            # https://docs.djangoproject.com/en/dev/ref/settings/#template-loaders
            # https://docs.djangoproject.com/en/dev/ref/templates/api/#loader-types
            "loaders": [
                "django.template.loaders.filesystem.Loader",
                "django.template.loaders.app_directories.Loader",
            ],
            # https://docs.djangoproject.com/en/dev/ref/settings/#template-context-processors
            "context_processors": [
                "django.template.context_processors.debug",
                "django.template.context_processors.request",
                "django.contrib.auth.context_processors.auth",
                "django.template.context_processors.i18n",
                "django.template.context_processors.media",
                "django.template.context_processors.static",
                "django.template.context_processors.tz",
                "django.contrib.messages.context_processors.messages",
            ],
        },
    },
]

# CORS
CORS_ORIGIN_ALLOW_ALL = True
CORS_ALLOW_HEADERS = list(default_cors_headers) + [
    "if-match",
    "if-modified-since",
    "if-none-match",
]
CORS_EXPOSE_HEADERS = ["etag"]

# FIXTURES
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#fixture-dirs
FIXTURE_DIRS = (str(APPS_DIR / "fixtures"),)

# EMAIL
# ------------------------------------------------------------------------------
# https://docs.djangoproject.com/en/dev/ref/settings/#email-backend
EMAIL_BACKEND = env(
    "DJANGO_EMAIL_BACKEND", default="django.core.mail.backends.smtp.EmailBackend"
)

# ADMIN
# ------------------------------------------------------------------------------
# Django Admin URL regex.
ADMIN_URL = "admin/"
# https://docs.djangoproject.com/en/dev/ref/settings/#admins
ADMINS = [
    ("""Gnosis""", "dev@gnosis.pm"),
]
# https://docs.djangoproject.com/en/dev/ref/settings/#managers
MANAGERS = ADMINS

# Celery
# ------------------------------------------------------------------------------
INSTALLED_APPS += [
    "django_celery_beat",
]

# http://docs.celeryproject.org/en/latest/userguide/configuration.html#std:setting-broker_url
CELERY_BROKER_URL = env("CELERY_BROKER_URL", default="django://")
# https://docs.celeryproject.org/en/stable/userguide/optimizing.html#broker-connection-pools
CELERY_BROKER_POOL_LIMIT = env(
    "CELERY_BROKER_POOL_LIMIT", default=env("CELERYD_CONCURRENCY", default=500)
)
# http://docs.celeryproject.org/en/latest/userguide/configuration.html#std:setting-result_backend
if CELERY_BROKER_URL == "django://":
    CELERY_RESULT_BACKEND = "redis://"
else:
    CELERY_RESULT_BACKEND = CELERY_BROKER_URL
# http://docs.celeryproject.org/en/latest/userguide/configuration.html#std:setting-accept_content
CELERY_ACCEPT_CONTENT = ["json"]
# http://docs.celeryproject.org/en/latest/userguide/configuration.html#std:setting-task_serializer
CELERY_TASK_SERIALIZER = "json"
# http://docs.celeryproject.org/en/latest/userguide/configuration.html#std:setting-result_serializer
CELERY_RESULT_SERIALIZER = "json"
# We are not interested in keeping results of tasks
CELERY_IGNORE_RESULT = True
# http://docs.celeryproject.org/en/latest/userguide/configuration.html#std:setting-task_always_eager
CELERY_ALWAYS_EAGER = False
# https://docs.celeryproject.org/en/latest/userguide/configuration.html#task-default-priority
# Higher = more priority on RabbitMQ, opposite on Redis ¯\_(ツ)_/¯
CELERY_TASK_DEFAULT_PRIORITY = 3
# https://docs.celeryproject.org/en/stable/userguide/configuration.html#task-queue-max-priority
CELERY_TASK_QUEUE_MAX_PRIORITY = 10
# https://docs.celeryproject.org/en/latest/userguide/configuration.html#broker-transport-options
CELERY_BROKER_TRANSPORT_OPTIONS = {
    "queue_order_strategy": "priority",
}


# Django REST Framework
# ------------------------------------------------------------------------------
REST_FRAMEWORK = {
    "PAGE_SIZE": 10,
    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.LimitOffsetPagination",
    "DEFAULT_PERMISSION_CLASSES": ("rest_framework.permissions.AllowAny",),
    "DEFAULT_RENDERER_CLASSES": (
        "djangorestframework_camel_case.render.CamelCaseJSONRenderer",
    ),
    "DEFAULT_PARSER_CLASSES": (
        "djangorestframework_camel_case.parser.CamelCaseJSONParser",
    ),
    "DEFAULT_VERSIONING_CLASS": "rest_framework.versioning.NamespaceVersioning",
    "EXCEPTION_HANDLER": "safe_transaction_service.history.exceptions.custom_exception_handler",
}

# LOGGING
# ------------------------------------------------------------------------------
# See: https://docs.djangoproject.com/en/dev/ref/settings/#logging
# A sample logging configuration. The only tangible logging
# performed by this configuration is to send an email to
# the site admins bon every HTTP 500 error when DEBUG=False.
# See https://docs.djangoproject.com/en/dev/topics/logging for
# more details on how to customize your logging configuration.
LOGGING = {
    "version": 1,
    "disable_existing_loggers": False,
    "filters": {
        "require_debug_false": {"()": "django.utils.log.RequireDebugFalse"},
        "ignore_succeeded_none": {
            "()": "safe_transaction_service.utils.loggers.IgnoreSucceededNone"
        },
    },
    "formatters": {
        "short": {"format": "%(asctime)s %(message)s"},
        "verbose": {
            "format": "%(asctime)s [%(levelname)s] [%(processName)s] %(message)s"
        },
        "celery_verbose": {
            "class": "safe_transaction_service.utils.celery.PatchedCeleryFormatter",
            "format": "%(asctime)s [%(levelname)s] [%(task_id)s/%(task_name)s] %(message)s",
            # 'format': '%(asctime)s [%(levelname)s] [%(processName)s] [%(task_id)s/%(task_name)s] %(message)s'
        },
    },
    "handlers": {
        "mail_admins": {
            "level": "ERROR",
            "filters": ["require_debug_false"],
            "class": "django.utils.log.AdminEmailHandler",
        },
        "console": {
            "level": "DEBUG",
            "class": "logging.StreamHandler",
            "formatter": "verbose",
        },
        "console_short": {
            "class": "logging.StreamHandler",
            "formatter": "short",
        },
        "celery_console": {
            "level": "DEBUG",
            "filters": [] if DEBUG else ["ignore_succeeded_none"],
            "class": "logging.StreamHandler",
            "formatter": "celery_verbose",
        },
    },
    "loggers": {
        "": {
            "handlers": ["console"],
            "level": "INFO",
        },
        "django.geventpool": {
            "level": "DEBUG" if DEBUG else "WARNING",
        },
        "LoggingMiddleware": {
            "handlers": ["console_short"],
            "level": "INFO",
            "propagate": False,
        },
        "safe_transaction_service": {
            "level": "DEBUG" if DEBUG else "INFO",
            "handlers": ["console"],
            "propagate": False,
        },
        "safe_transaction_service.history.services.balance_service": {
            "level": "DEBUG" if DEBUG else "WARNING",
        },
        "safe_transaction_service.history.services.collectibles_service": {
            "level": "DEBUG" if DEBUG else "WARNING",
        },
        "celery": {
            "handlers": ["console"],
            "level": "DEBUG" if DEBUG else "INFO",
            "propagate": False,  # If not it will be out for the root logger too
        },
        "celery.worker.strategy": {  # All the "Received task..."
            "handlers": ["console"],
            "level": "INFO" if DEBUG else "WARNING",
            "propagate": False,  # If not it will be out for the root logger too
        },
        "django.request": {
            "handlers": ["mail_admins"],
            "level": "ERROR",
            "propagate": True,
        },
        "django.security.DisallowedHost": {
            "level": "ERROR",
            "handlers": ["console", "mail_admins"],
            "propagate": True,
        },
    },
}

REDIS_URL = env("REDIS_URL", default="redis://localhost:6379/0")

# Ethereum
# ------------------------------------------------------------------------------
ETHEREUM_NODE_URL = env("ETHEREUM_NODE_URL", default=None)
ETHEREUM_TRACING_NODE_URL = env("ETHEREUM_TRACING_NODE_URL", default=None)
ETH_INTERNAL_TXS_BLOCK_PROCESS_LIMIT = env.int(
    "ETH_INTERNAL_TXS_BLOCK_PROCESS_LIMIT", default=10000
)
ETH_INTERNAL_NO_FILTER = env.bool("ETH_INTERNAL_NO_FILTER", default=False)
ETH_L2_NETWORK = env.bool(
    "ETH_L2_NETWORK", default=not ETHEREUM_TRACING_NODE_URL
)  # Use L2 event indexing
ETH_EVENTS_BLOCK_PROCESS_LIMIT = env.int(
    "ETH_EVENTS_BLOCK_PROCESS_LIMIT", default=50
)  # Initial number of blocks to process together when searching for events. It will be auto increased. 0 == no limit.
ETH_EVENTS_BLOCK_PROCESS_LIMIT_MAX = env.int(
    "ETH_EVENTS_BLOCK_PROCESS_LIMIT_MAX", default=0
)  # Maximum number of blocks to process together when searching for events. 0 == no limit.
ETH_EVENTS_QUERY_CHUNK_SIZE = env.int(
    "ETH_EVENTS_QUERY_CHUNK_SIZE", default=0
)  # Number of addresses 'almost updated' to update together. 0 == no limit
ETH_EVENTS_UPDATED_BLOCK_BEHIND = env.int(
    "ETH_EVENTS_UPDATED_BLOCK_BEHIND", default=24 * 60 * 60 // 15
)  # Number of blocks to consider an address 'almost updated'.

# Safe
# ------------------------------------------------------------------------------
# Number of blocks from the current block number needed to consider a transaction valid/stable
ETH_REORG_BLOCKS = env.int(
    "ETH_REORG_BLOCKS", default=50 if ETH_L2_NETWORK else 10
)  # L2 Networks have more reorgs

# Tokens
TOKENS_LOGO_BASE_URI = env(
    "TOKENS_LOGO_BASE_URI", default="https://gnosis-safe-token-logos.s3.amazonaws.com/"
)
TOKENS_LOGO_EXTENSION = env("TOKENS_LOGO_EXTENSION", default=".png")

# Slack notifications
SLACK_API_WEBHOOK = env("SLACK_API_WEBHOOK", default=None)

# Notifications
NOTIFICATIONS_FIREBASE_CREDENTIALS_PATH = env(
    "NOTIFICATIONS_FIREBASE_CREDENTIALS_PATH", default=None
)
if NOTIFICATIONS_FIREBASE_CREDENTIALS_PATH:
    import json

    NOTIFICATIONS_FIREBASE_AUTH_CREDENTIALS = json.load(
        environ.Path(NOTIFICATIONS_FIREBASE_CREDENTIALS_PATH).file(
            "firebase-credentials.json"
        )
    )


# AWS S3 https://github.com/etianen/django-s3-storage
# AWS_QUERYSTRING_AUTH = False  # Remove query parameter authentication from generated URLs
AWS_ACCESS_KEY_ID = env("AWS_ACCESS_KEY_ID", default=None)
AWS_S3_PUBLIC_URL = env(
    "AWS_S3_PUBLIC_URL", default=None
)  # Set custom domain for file urls (like cloudfront)
AWS_SECRET_ACCESS_KEY = env("AWS_SECRET_ACCESS_KEY", default=None)
AWS_S3_BUCKET_NAME = env("AWS_STORAGE_BUCKET_NAME", default=None)
AWS_S3_FILE_OVERWRITE = True
AWS_CONFIGURED = bool(
    AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY and AWS_S3_BUCKET_NAME
)

ETHERSCAN_API_KEY = env("ETHERSCAN_API_KEY", default=None)
IPFS_GATEWAY = env("IPFS_GATEWAY", default="https://cloudflare-ipfs.com/ipfs/")

SWAGGER_SETTINGS = {
    "SECURITY_DEFINITIONS": {
        "api_key": {"type": "apiKey", "in": "header", "name": "Authorization"}
    },
}