Problem: Source files contain no license info (#2455)

* Problem: Source files contain no license info

Solution: Add comments with SPDX license info to source files

* Python 3 files don't need # -*- coding: utf-8 -*-

.ci/entrypoint.sh

@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 
 set -e -x
 

.ci/travis-after-success.sh

@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 
 set -e -x
 

.ci/travis-before-install.sh

@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 
 if [[ -z ${TOXENV} ]]; then
   sudo apt-get update

.ci/travis-before-script.sh

@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 
 set -e -x
 

.ci/travis-install.sh

@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 
 set -e -x
 

.ci/travis_script.sh

@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 
 set -e -x
 

.github/CONTRIBUTING.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # How to Contribute to the BigchainDB Project
 
 There are many ways you can contribute to the BigchainDB project, some very easy and others more involved.

.pre-commit-config.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 repos:
 -   repo: git://github.com/pre-commit/pre-commit-hooks
     sha: v1.1.1

.readthedocs.yml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 build:
     image: latest
 

.travis.yml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 sudo: required
 
 dist: trusty

CHANGELOG.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Change Log (Release Notes)
 
 All _notable_ changes to this project will be documented in this file (`CHANGELOG.md`).

CODE_OF_CONDUCT.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Contributor Code of Conduct
 
 As contributors and maintainers of this project, and in the interest of

HOW_TO_HANDLE_PULL_REQUESTS.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # How to Handle External Pull Requests
 
 See [BEP-16](https://github.com/bigchaindb/BEPs/tree/master/16).

PYTHON_STYLE_GUIDE.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Python Style Guide
 
 This guide starts out with our general Python coding style guidelines and ends with a section on how we write & run (Python) tests.

README.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 <!--- There is no shield to get the latest version
 (including pre-release versions) from PyPI,
 so show the latest GitHub release instead.

RELEASE_PROCESS.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Our Release Process
 
 ## Notes

ROADMAP.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # BigchainDB Roadmap
 
 We moved the BigchainDB Roadmap to the bigchaindb/org repository; see:

acceptance/README.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Acceptance test suite
 This directory contains the acceptance test suite for BigchainDB.
 

acceptance/python/src/test_basic.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # # Basic Acceptance Test
 # Here we check that the primitives of the system behave as expected.
 # As you will see, this script tests basic stuff like:
@@ -36,7 +40,6 @@ def test_basic():
     # The two keypairs will be called—drum roll—Alice and Bob.
     alice, bob = generate_keypair(), generate_keypair()
 
-
     # ## Alice registers her bike in BigchainDB
     # Alice has a nice bike, and here she creates the "digital twin"
     # of her bike.
@@ -57,7 +60,6 @@ def test_basic():
     # a variable with a short and easy name
     bike_id = fulfilled_creation_tx['id']
 
-
     # Now she is ready to send it to the BigchainDB Network.
     sent_transfer_tx = bdb.transactions.send(fulfilled_creation_tx)
 
@@ -69,7 +71,6 @@ def test_basic():
     assert len(bdb.outputs.get(alice.public_key, spent=False)) == 1
     assert bdb.outputs.get(alice.public_key)[0]['transaction_id'] == bike_id
 
-
     # ## Alice transfers her bike to Bob
     # After registering her bike, Alice is ready to transfer it to Bob.
     # She needs to create a new `TRANSFER` transaction.

acceptance/python/src/test_divisible_asset.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # # Divisible assets integration testing
 # This test checks if we can successfully divide assets.
 # The script tests various things like:

acceptance/python/src/test_double_spend.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # # Double Spend testing
 # This test challenge the system with double spends.
 

acceptance/python/src/test_multiple_owners.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # # Multiple owners integration testing
 # This test checks if we can successfully create and transfer a transaction
 # with multiple owners.

acceptance/python/src/test_naughty_strings.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # ## Testing potentially hazardous strings
 # This test uses a library of `naughty` strings (code injections, weird unicode chars., etc.) as both keys and values.
 # We look for either a successful tx, or in the case that we use a naughty string as a key, and it violates some key
@@ -8,7 +12,8 @@
 # env variables.
 import os
 
-# Since the naughty strings get encoded and decoded in odd ways, we'll use a regex to sweep those details under the rug.
+# Since the naughty strings get encoded and decoded in odd ways,
+# we'll use a regex to sweep those details under the rug.
 import re
 
 # We'll use a nice library of naughty strings...

acceptance/python/src/test_stream.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # # Stream Acceptance Test
 # This test checks if the event stream works correctly. The basic idea of this
 # test is to generate some random **valid** transaction, send them to a

bigchaindb/README.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Overview
 
 A high-level description of the files and subdirectories of BigchainDB.

bigchaindb/__init__.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import copy
 import logging
 

bigchaindb/backend/README.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Backend Interfaces
 
 ## Structure

bigchaindb/backend/__init__.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Generic backend database interfaces expected by BigchainDB.
 
 The interfaces in this module allow BigchainDB to be agnostic about its

bigchaindb/backend/connection.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from itertools import repeat
 from importlib import import_module
 import logging

bigchaindb/backend/exceptions.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from bigchaindb.exceptions import BigchainDBError
 
 

bigchaindb/backend/localmongodb/__init__.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """MongoDB backend implementation.
 
 Contains a MongoDB-specific implementation of the

bigchaindb/backend/localmongodb/connection.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import time
 import logging
 from ssl import CERT_REQUIRED

bigchaindb/backend/localmongodb/query.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Query implementation for MongoDB"""
 
 from pymongo import DESCENDING

bigchaindb/backend/localmongodb/schema.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Utils to initialize and drop the database."""
 
 import logging

bigchaindb/backend/query.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Query interfaces for backends."""
 
 from functools import singledispatch
@@ -364,6 +368,7 @@ def store_validator_set(conn, validator_update):
 @singledispatch
 def get_validator_set(conn, height):
     """Get validator set for a given `height`, if `height` is not specified
-    then return the latest validator set"""
+    then return the latest validator set
+    """
 
     raise NotImplementedError

bigchaindb/backend/schema.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Database creation and schema-providing interfaces for backends.
 
 Attributes:

bigchaindb/backend/utils.py

@@ -1,3 +1,8 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
+
 class ModuleDispatchRegistrationError(Exception):
     """Raised when there is a problem registering dispatched functions for a
     module

bigchaindb/commands/bigchaindb.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Implementation of the `bigchaindb` command,
 the command-line interface (CLI) for BigchainDB Server.
 """

bigchaindb/commands/utils.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Utility functions and basic common arguments
 for ``argparse.ArgumentParser``.
 """

bigchaindb/common/crypto.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # Separate all crypto code so that we can easily test several implementations
 from collections import namedtuple
 

bigchaindb/common/exceptions.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Custom exceptions used in the `bigchaindb` package.
 """
 from bigchaindb.exceptions import BigchainDBError

bigchaindb/common/schema/README.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Introduction
 
 This directory contains the schemas for the different JSON documents BigchainDB uses.

bigchaindb/common/schema/__init__.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Schema validation related functions and data"""
 import os.path
 import logging

bigchaindb/common/schema/transaction_create_v1.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/schema/transaction_create_v2.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/schema/transaction_transfer_v1.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/schema/transaction_transfer_v2.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/schema/transaction_v1.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/schema/transaction_v2.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/schema/transaction_validator_election_v2.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/schema/transaction_validator_election_vote_v2.0.yaml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 ---
 "$schema": "http://json-schema.org/draft-04/schema#"
 type: object

bigchaindb/common/transaction.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Transaction related models to parse and construct transaction
 payloads.
 
@@ -570,7 +574,7 @@ class Transaction(object):
 
     @property
     def spent_outputs(self):
-        """tuple of :obj:`dict`: Inputs of this transaction. Each input
+        """Tuple of :obj:`dict`: Inputs of this transaction. Each input
         is represented as a dictionary containing a transaction id and
         output index.
         """

bigchaindb/common/utils.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import time
 import re
 import rapidjson

bigchaindb/config_utils.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Utils for reading and setting configuration settings.
 
 The value of each BigchainDB Server configuration setting is

bigchaindb/consensus.py

@@ -1,3 +1,6 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
 
 
 class BaseConsensusRules():

bigchaindb/core.py

@@ -1,5 +1,10 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """This module contains all the goodness to integrate BigchainDB
-with Tendermint."""
+with Tendermint.
+"""
 import logging
 import codecs
 
@@ -33,7 +38,8 @@ class App(BaseApplication):
 
     The role of this class is to expose the BigchainDB
     transactional logic to the Tendermint Consensus
-    State Machine."""
+    State Machine.
+    """
 
     def __init__(self, bigchaindb=None):
         self.bigchaindb = bigchaindb or BigchainDB()
@@ -69,7 +75,8 @@ class App(BaseApplication):
         the mempool.
 
         Args:
-            raw_tx: a raw string (in bytes) transaction."""
+            raw_tx: a raw string (in bytes) transaction.
+        """
 
         logger.benchmark('CHECK_TX_INIT')
         logger.debug('check_tx: %s', raw_transaction)
@@ -101,7 +108,8 @@ class App(BaseApplication):
         """Validate the transaction before mutating the state.
 
         Args:
-            raw_tx: a raw string (in bytes) transaction."""
+            raw_tx: a raw string (in bytes) transaction.
+        """
         logger.debug('deliver_tx: %s', raw_transaction)
         transaction = self.bigchaindb.is_valid_transaction(
             decode_transaction(raw_transaction), self.block_transactions)
@@ -120,7 +128,8 @@ class App(BaseApplication):
         hash to be stored in the next block.
 
         Args:
-            height (int): new height of the chain."""
+            height (int): new height of the chain.
+        """
 
         height = request_end_block.height
         self.new_height = height

bigchaindb/event_stream.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import asyncio
 import json
 import logging

bigchaindb/events.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from queue import Empty
 from collections import defaultdict
 from multiprocessing import Queue

bigchaindb/exceptions.py

@@ -1,3 +1,8 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
+
 class BigchainDBError(Exception):
     """Base class for BigchainDB exceptions."""
 

bigchaindb/fastquery.py

@@ -1,19 +1,20 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from bigchaindb.utils import condition_details_has_owner
 from bigchaindb.backend import query
 from bigchaindb.common.transaction import TransactionLink
 
 
 class FastQuery():
-    """
+    """Database queries that join on block results from a single node."""
-    Database queries that join on block results from a single node.
+
-    """
     def __init__(self, connection):
         self.connection = connection
 
     def get_outputs_by_public_key(self, public_key):
-        """
+        """Get outputs for a public key"""
-        Get outputs for a public key
-        """
         txs = list(query.get_owned_ids(self.connection, public_key))
         return [TransactionLink(tx['id'], index)
                 for tx in txs
@@ -22,8 +23,7 @@ class FastQuery():
                                                public_key)]
 
     def filter_spent_outputs(self, outputs):
-        """
+        """Remove outputs that have been spent
-        Remove outputs that have been spent
 
         Args:
             outputs: list of TransactionLink
@@ -36,8 +36,7 @@ class FastQuery():
         return [ff for ff in outputs if ff not in spends]
 
     def filter_unspent_outputs(self, outputs):
-        """
+        """Remove outputs that have not been spent
-        Remove outputs that have not been spent
 
         Args:
             outputs: list of TransactionLink

bigchaindb/lib.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Module containing main contact points with Tendermint and
 MongoDB.
 

bigchaindb/log.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import bigchaindb
 import logging
 

bigchaindb/models.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from bigchaindb.common.exceptions import (InvalidSignature,
                                           DuplicateTransaction)
 from bigchaindb.common.transaction import Transaction

bigchaindb/start.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import logging
 import setproctitle
 

bigchaindb/tendermint_utils.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import base64
 import hashlib
 import json

bigchaindb/upsert_validator/__init__.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 
 from bigchaindb.upsert_validator.validator_election import ValidatorElection # noqa
 from bigchaindb.upsert_validator.validator_election_vote import ValidatorElectionVote # noqa

bigchaindb/upsert_validator/validator_election.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from bigchaindb.common.exceptions import (InvalidSignature,
                                           MultipleInputsError,
                                           InvalidProposer,

bigchaindb/upsert_validator/validator_election_vote.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import base58
 
 from bigchaindb.common.transaction import Transaction

bigchaindb/utils.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import contextlib
 import threading
 import queue

bigchaindb/version.py

@@ -1,2 +1,6 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 __version__ = '2.0.0b5'
 __short_version__ = '2.0b5'

bigchaindb/web/routes.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """API routes definition"""
 from flask_restful import Api
 from bigchaindb.web.views import (

bigchaindb/web/server.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """This module contains basic functions to instantiate the BigchainDB API.
 
 The application is implemented in Flask and runs using Gunicorn.

bigchaindb/web/strip_content_type_middleware.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import logging
 
 logger = logging.getLogger(__name__)

bigchaindb/web/views/assets.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """This module provides the blueprint for some basic API endpoints.
 
 For more information please refer to the documentation: http://bigchaindb.com/http-api

bigchaindb/web/views/base.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """Common classes and methods for API handlers
 """
 import logging

bigchaindb/web/views/blocks.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """This module provides the blueprint for the blocks API endpoints.
 
 For more information please refer to the documentation: http://bigchaindb.com/http-api

bigchaindb/web/views/info.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """API Index endpoint"""
 
 import flask

bigchaindb/web/views/metadata.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """This module provides the blueprint for some basic API endpoints.
 
 For more information please refer to the documentation: http://bigchaindb.com/http-api

bigchaindb/web/views/outputs.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from flask import current_app
 from flask_restful import reqparse, Resource
 

bigchaindb/web/views/parameters.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 import re
 
 

bigchaindb/web/views/transactions.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """This module provides the blueprint for some basic API endpoints.
 
 For more information please refer to the documentation: http://bigchaindb.com/http-api

bigchaindb/web/views/validators.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 from flask import current_app
 from flask_restful import Resource
 

bigchaindb/web/websocket_server.py

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 """WebSocket server for the BigchainDB Event Stream API."""
 
 # NOTE

codecov.yml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 codecov:
   branch: master     # the branch to show by default
 

docker-compose.yml

@@ -1,3 +1,7 @@
+# Copyright BigchainDB GmbH and BigchainDB contributors
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 version: '2.1'
 
 services:

docs/README.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 - [Documentation on ReadTheDocs](http://bigchaindb.readthedocs.org/)
 - [BigchainDB Upgrade Guides](upgrade-guides/)
 

docs/contributing/source/conf.py

@@ -1,6 +1,8 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
+# Copyright BigchainDB GmbH and BigchainDB contributors
-#
+# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+# Code is Apache-2.0 and docs are CC-BY-4.0
+
 # BigchainDB documentation build configuration file, created by
 # sphinx-quickstart on Thu Sep 29 11:13:27 2016.
 #

docs/contributing/source/cross-project-policies/index.rst

@@ -1,3 +1,8 @@
+
+.. Copyright BigchainDB GmbH and BigchainDB contributors
+   SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+   Code is Apache-2.0 and docs are CC-BY-4.0
+
 Policies
 ========
 

docs/contributing/source/dev-setup-coding-and-contribution-process/index.rst

@@ -1,3 +1,8 @@
+
+.. Copyright BigchainDB GmbH and BigchainDB contributors
+   SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+   Code is Apache-2.0 and docs are CC-BY-4.0
+
 Developer Setup, Coding & Contribution Process
 ==============================================
 

docs/contributing/source/dev-setup-coding-and-contribution-process/run-dev-network-ansible.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Run a BigchainDB network with Ansible
 
 **NOT for Production Use**

docs/contributing/source/dev-setup-coding-and-contribution-process/run-dev-network-stack.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Run a BigchainDB network
 
 **NOT for Production Use**

docs/contributing/source/dev-setup-coding-and-contribution-process/run-node-as-processes.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Notes on Running a Local Dev Node as Processes
 
 The following doc describes how to run a local node for developing BigchainDB Tendermint version.

docs/contributing/source/dev-setup-coding-and-contribution-process/run-node-with-docker-compose.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Notes on Running a Local Dev Node with Docker Compose
 
 ## Setting up a single node development environment with ``docker-compose``

docs/contributing/source/dev-setup-coding-and-contribution-process/write-code.rst

@@ -1,3 +1,8 @@
+
+.. Copyright BigchainDB GmbH and BigchainDB contributors
+   SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+   Code is Apache-2.0 and docs are CC-BY-4.0
+
 Write Code
 ==========
 

docs/contributing/source/index.rst

@@ -1,3 +1,8 @@
+
+.. Copyright BigchainDB GmbH and BigchainDB contributors
+   SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+   Code is Apache-2.0 and docs are CC-BY-4.0
+
 Contributing to BigchainDB
 ==========================
 

docs/contributing/source/ways-to-contribute/answer-questions.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Answer Questions
 
 People ask questions about BigchainDB in the following places:

docs/contributing/source/ways-to-contribute/index.rst

@@ -1,3 +1,8 @@
+
+.. Copyright BigchainDB GmbH and BigchainDB contributors
+   SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+   Code is Apache-2.0 and docs are CC-BY-4.0
+
 Ways to Contribute
 ==================
 

docs/contributing/source/ways-to-contribute/make-a-feature-request-or-proposal.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Make a Feature Request or Proposal
 
 To make a feature request or proposal, [write a BigchainDB Enhancement Proposal (BEP)](write-a-bep.html).

docs/contributing/source/ways-to-contribute/report-a-bug.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Report a Bug
 
 To report a bug, go to the relevant GitHub repository, click on the **Issues** tab, click on the **New issue** button, and read the instructions.

docs/contributing/source/ways-to-contribute/write-a-bep.md

@@ -1,3 +1,9 @@
+<!---
+Copyright BigchainDB GmbH and BigchainDB contributors
+SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
+Code is Apache-2.0 and docs are CC-BY-4.0
+--->
+
 # Write a BigchainDB Enhancement Proposal (BEP)
 
 If you have an idea for a new feature or enhancement, and you want some feedback before you write a full BigchainDB Enhancement Proposal (BEP), then feel free to: