Merge branch 'master' into activating-tests

.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

@@ -1,10 +1,13 @@
+# 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
 
 from bigchaindb import backend
 from bigchaindb.backend.exceptions import DuplicateKeyError
-from bigchaindb.common.exceptions import MultipleValidatorOperationError
 from bigchaindb.backend.utils import module_dispatch_registrar
 from bigchaindb.backend.localmongodb.connection import LocalMongoDBConnection
 from bigchaindb.common.transaction import Transaction
@@ -101,7 +104,8 @@ def get_spent(conn, transaction_id, output):
 def get_latest_block(conn):
     return conn.run(
         conn.collection('blocks')
-        .find_one(sort=[('height', DESCENDING)]))
+        .find_one(projection={'_id': False},
+                  sort=[('height', DESCENDING)]))
 
 
 @register_query(LocalMongoDBConnection)
@@ -268,13 +272,15 @@ def get_pre_commit_state(conn, commit_id):
 
 
 @register_query(LocalMongoDBConnection)
-def store_validator_set(conn, validator_update):
-    try:
-        return conn.run(
-            conn.collection('validators')
-            .insert_one(validator_update))
-    except DuplicateKeyError:
-        raise MultipleValidatorOperationError('Validator update already exists')
+def store_validator_set(conn, validators_update):
+    height = validators_update['height']
+    return conn.run(
+        conn.collection('validators').replace_one(
+            {'height': height},
+            validators_update,
+            upsert=True
+        )
+    )
 
 
 @register_query(LocalMongoDBConnection)
@@ -291,3 +297,16 @@ def get_validator_set(conn, height=None):
     )
 
     return list(cursor)[0]
+
+
+@register_query(LocalMongoDBConnection)
+def get_asset_tokens_for_public_key(conn, asset_id, public_key):
+    query = {'outputs.public_keys': [public_key],
+             'asset.id': asset_id}
+
+    cursor = conn.run(
+        conn.collection('transactions').aggregate([
+            {'$match': query},
+            {'$project': {'_id': False}}
+        ]))
+    return cursor

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
@@ -27,8 +31,7 @@ def create_database(conn, dbname):
 
 @register_schema(LocalMongoDBConnection)
 def create_tables(conn, dbname):
-    for table_name in ['transactions', 'utxos', 'assets', 'blocks', 'metadata',
-                       'validators', 'pre_commit']:
+    for table_name in backend.schema.TABLES:
         logger.info('Create `%s` table.', table_name)
         # create the table
         # TODO: read and write concerns can be declared here

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
@@ -354,3 +358,17 @@ def get_validator_set(conn, height):
     """
 
     raise NotImplementedError
+
+
+@singledispatch
+def get_asset_tokens_for_public_key(connection, asset_id,
+                                    public_key, operation):
+    """Retrieve a list of tokens of type `asset_id` that are owned by the `public_key`.
+    Args:
+        asset_id (str): Id of the token.
+        public_key (str): base58 encoded public key
+        operation: filter transaction based on `operation`
+    Returns:
+        Iterator of transaction that list given owner in conditions.
+    """
+    raise NotImplementedError

bigchaindb/backend/schema.py

@@ -1,13 +1,8 @@
-"""Database creation and schema-providing interfaces for backends.
+# 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
 
-Attributes:
-    TABLES (tuple): The three standard tables BigchainDB relies on:
-
-        * ``backlog`` for incoming transactions awaiting to be put into
-          a block.
-        * ``bigchain`` for blocks.
-
-"""
+"""Database creation and schema-providing interfaces for backends."""
 
 from functools import singledispatch
 import logging
@@ -19,7 +14,10 @@ from bigchaindb.common.utils import validate_all_values_for_key
 
 logger = logging.getLogger(__name__)
 
-TABLES = ('bigchain', 'backlog', 'assets', 'metadata')
+# Tables/collections that every backend database must create
+TABLES = ('transactions', 'blocks', 'assets', 'metadata',
+          'validators', 'pre_commit', 'utxos')
+
 VALID_LANGUAGES = ('danish', 'dutch', 'english', 'finnish', 'french', 'german',
                    'hungarian', 'italian', 'norwegian', 'portuguese', 'romanian',
                    'russian', 'spanish', 'swedish', 'turkish', 'none',

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
@@ -5,7 +9,6 @@ import logging
 import jsonschema
 import yaml
 import rapidjson
-import rapidjson_schema
 
 from bigchaindb.common.exceptions import SchemaValidationError
 
@@ -18,7 +21,7 @@ def _load_schema(name, path=__file__):
     path = os.path.join(os.path.dirname(path), name + '.yaml')
     with open(path) as handle:
         schema = yaml.safe_load(handle)
-    fast_schema = rapidjson_schema.loads(rapidjson.dumps(schema))
+    fast_schema = rapidjson.Validator(rapidjson.dumps(schema))
     return path, (schema, fast_schema)
 
 
@@ -53,7 +56,7 @@ def _validate_schema(schema, body):
     # a helpful error message.
 
     try:
-        schema[1].validate(rapidjson.dumps(body))
+        schema[1](rapidjson.dumps(body))
     except ValueError as exc:
         try:
             jsonschema.validate(body, schema[0])

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
@@ -6,7 +10,9 @@ required:
 - operation
 - outputs
 properties:
-  operation: "VALIDATOR_ELECTION_VOTE"
+  operation:
+    type: string
+    value: "VALIDATOR_ELECTION_VOTE"
   outputs:
     type: array
     items:

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

@@ -1,7 +1,11 @@
+# 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
 
 from abci.application import BaseApplication
 from abci.types_pb2 import (
@@ -12,8 +16,6 @@ from abci.types_pb2 import (
     ResponseDeliverTx,
     ResponseEndBlock,
     ResponseCommit,
-    Validator,
-    PubKey
 )
 
 from bigchaindb import BigchainDB
@@ -21,6 +23,8 @@ from bigchaindb.tendermint_utils import (decode_transaction,
                                          calculate_hash)
 from bigchaindb.lib import Block, PreCommitState
 from bigchaindb.backend.query import PRE_COMMIT_ID
+from bigchaindb.upsert_validator import ValidatorElection
+import bigchaindb.upsert_validator.validator_utils as vutils
 
 
 CodeTypeOk = 0
@@ -33,7 +37,8 @@ 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()
@@ -46,7 +51,7 @@ class App(BaseApplication):
     def init_chain(self, genesis):
         """Initialize chain with block of height 0"""
 
-        validator_set = [decode_validator(v) for v in genesis.validators]
+        validator_set = [vutils.decode_validator(v) for v in genesis.validators]
         block = Block(app_hash='', height=0, transactions=[])
         self.bigchaindb.store_block(block._asdict())
         self.bigchaindb.store_validator_set(1, validator_set)
@@ -69,7 +74,8 @@ 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 +107,8 @@ 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 +127,8 @@ 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
@@ -132,11 +140,11 @@ class App(BaseApplication):
         else:
             self.block_txn_hash = block['app_hash']
 
-        # TODO: calculate if an election has concluded
-        # NOTE: ensure the local validator set is updated
-        # validator_updates = self.bigchaindb.get_validator_update()
-        # validator_updates = [encode_validator(v) for v in validator_updates]
-        validator_updates = []
+        # Check if the current block concluded any validator elections and
+        # update the locally tracked validator set
+        validator_updates = ValidatorElection.get_validator_update(self.bigchaindb,
+                                                                   self.new_height,
+                                                                   self.block_transactions)
 
         # Store pre-commit state to recover in case there is a crash
         # during `commit`
@@ -167,22 +175,3 @@ class App(BaseApplication):
                      self.block_txn_ids)
         logger.benchmark('COMMIT_BLOCK, height:%s', self.new_height)
         return ResponseCommit(data=data)
-
-
-def encode_validator(v):
-    ed25519_public_key = v['pub_key']['data']
-    # NOTE: tendermint expects public to be encoded in go-amino format
-
-    pub_key = PubKey(type='ed25519',
-                     data=bytes.fromhex(ed25519_public_key))
-
-    return Validator(pub_key=pub_key,
-                     address=b'',
-                     power=v['power'])
-
-
-def decode_validator(v):
-    return {'address': codecs.encode(v.address, 'hex').decode().upper().rstrip('\n'),
-            'pub_key': {'type': v.pub_key.type,
-                        'data': codecs.encode(v.pub_key.data, 'base64').decode().rstrip('\n')},
-            'voting_power': v.power}

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.
 
@@ -24,6 +28,7 @@ from bigchaindb.tendermint_utils import encode_transaction, merkleroot
 from bigchaindb import exceptions as core_exceptions
 from bigchaindb.consensus import BaseConsensusRules
 
+
 logger = logging.getLogger(__name__)
 
 
@@ -418,16 +423,8 @@ class BigchainDB(object):
     def get_validators(self, height=None):
         result = backend.query.get_validator_set(self.connection, height)
         validators = result['validators']
-        for v in validators:
-            v.pop('address')
-            v['voting_power'] = int(v['voting_power'])
-
         return validators
 
-    def get_validator_update(self):
-        update = backend.query.get_validator_update(self.connection)
-        return [update['validator']] if update else []
-
     def delete_validator_update(self):
         return backend.query.delete_validator_update(self.connection)
 

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
+from bigchaindb.upsert_validator.validator_election import ValidatorElection # noqa

bigchaindb/upsert_validator/validator_election.py

@@ -1,3 +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
+
+import base58
+
+from bigchaindb import backend
 from bigchaindb.common.exceptions import (InvalidSignature,
                                           MultipleInputsError,
                                           InvalidProposer,
@@ -11,6 +18,8 @@ from bigchaindb.common.schema import (_validate_schema,
                                       TX_SCHEMA_VALIDATOR_ELECTION,
                                       TX_SCHEMA_COMMON,
                                       TX_SCHEMA_CREATE)
+from . import ValidatorElectionVote
+from .validator_utils import (new_validator_set, encode_validator)
 
 
 class ValidatorElection(Transaction):
@@ -28,15 +37,15 @@ class ValidatorElection(Transaction):
         super().__init__(operation, asset, inputs, outputs, metadata, version, hash_id)
 
     @classmethod
-    def current_validators(cls, bigchain):
+    def get_validators(cls, bigchain, height=None):
         """Return a dictionary of validators with key as `public_key` and
            value as the `voting_power`
         """
 
         validators = {}
-        for validator in bigchain.get_validators():
+        for validator in bigchain.get_validators(height):
             # NOTE: we assume that Tendermint encodes public key in base64
-            public_key = public_key_from_ed25519_key(key_from_base64(validator['pub_key']['value']))
+            public_key = public_key_from_ed25519_key(key_from_base64(validator['pub_key']['data']))
             validators[public_key] = validator['voting_power']
 
         return validators
@@ -46,7 +55,7 @@ class ValidatorElection(Transaction):
         """Convert validator dictionary to a recipient list for `Transaction`"""
 
         recipients = []
-        for public_key, voting_power in cls.current_validators(bigchain).items():
+        for public_key, voting_power in cls.get_validators(bigchain).items():
             recipients.append(([public_key], voting_power))
 
         return recipients
@@ -80,7 +89,7 @@ class ValidatorElection(Transaction):
             bigchain (BigchainDB): an instantiated bigchaindb.lib.BigchainDB object.
 
         Returns:
-            `True` if the election is valid
+            ValidatorElection object
 
         Raises:
             ValidationError: If the election is invalid
@@ -95,7 +104,7 @@ class ValidatorElection(Transaction):
         if not self.inputs_valid(input_conditions):
             raise InvalidSignature('Transaction signature is invalid.')
 
-        current_validators = self.current_validators(bigchain)
+        current_validators = self.get_validators(bigchain)
 
         # NOTE: Proposer should be a single node
         if len(self.inputs) != 1 or len(self.inputs[0].owners_before) != 1:
@@ -114,7 +123,7 @@ class ValidatorElection(Transaction):
         if not self.is_same_topology(current_validators, self.outputs):
             raise UnequalValidatorSet('Validator set much be exactly same to the outputs of election')
 
-        return True
+        return self
 
     @classmethod
     def generate(cls, initiator, voters, election_data, metadata=None):
@@ -141,3 +150,77 @@ class ValidatorElection(Transaction):
     @classmethod
     def transfer(cls, tx_signers, recipients, metadata=None, asset=None):
         raise NotImplementedError
+
+    @classmethod
+    def to_public_key(cls, election_id):
+        return base58.b58encode(bytes.fromhex(election_id))
+
+    @classmethod
+    def count_votes(cls, election_pk, transactions, getter=getattr):
+        votes = 0
+        for txn in transactions:
+            if getter(txn, 'operation') == 'VALIDATOR_ELECTION_VOTE':
+                for output in getter(txn, 'outputs'):
+                    # NOTE: We enforce that a valid vote to election id will have only
+                    # election_pk in the output public keys, including any other public key
+                    # along with election_pk will lead to vote being not considered valid.
+                    if len(getter(output, 'public_keys')) == 1 and [election_pk] == getter(output, 'public_keys'):
+                        votes = votes + int(getter(output, 'amount'))
+        return votes
+
+    def get_commited_votes(self, bigchain, election_pk=None):
+        if election_pk is None:
+            election_pk = self.to_public_key(self.id)
+        txns = list(backend.query.get_asset_tokens_for_public_key(bigchain.connection,
+                                                                  self.id,
+                                                                  election_pk))
+        return self.count_votes(election_pk, txns, dict.get)
+
+    @classmethod
+    def has_concluded(cls, bigchain, election_id, current_votes=[], height=None):
+        """Check if the given `election_id` can be concluded or not
+        NOTE:
+        * Election is concluded iff the current validator set is exactly equal
+          to the validator set encoded in election outputs
+        * Election can concluded only if the current votes achieves a supermajority
+        """
+        election = bigchain.get_transaction(election_id)
+
+        if election:
+            election_pk = election.to_public_key(election.id)
+            votes_commited = election.get_commited_votes(bigchain, election_pk)
+            votes_current = election.count_votes(election_pk, current_votes)
+            current_validators = election.get_validators(bigchain, height)
+
+            if election.is_same_topology(current_validators, election.outputs):
+                total_votes = sum(current_validators.values())
+                if (votes_commited < (2/3)*total_votes) and \
+                   (votes_commited + votes_current >= (2/3)*total_votes):
+                    return election
+        return False
+
+    @classmethod
+    def get_validator_update(cls, bigchain, new_height, txns):
+        votes = {}
+        for txn in txns:
+            if not isinstance(txn, ValidatorElectionVote):
+                continue
+
+            election_id = txn.asset['id']
+            election_votes = votes.get(election_id, [])
+            election_votes.append(txn)
+            votes[election_id] = election_votes
+
+            election = cls.has_concluded(bigchain, election_id, election_votes, new_height)
+            # Once an election concludes any other conclusion for the same
+            # or any other election is invalidated
+            if election:
+                # The new validator set comes into effect from height = new_height+1
+                validator_updates = [election.asset['data']]
+                curr_validator_set = bigchain.get_validators(new_height)
+                updated_validator_set = new_validator_set(curr_validator_set,
+                                                          new_height, validator_updates)
+
+                bigchain.store_validator_set(new_height+1, updated_validator_set)
+                return [encode_validator(election.asset['data'])]
+        return []

bigchaindb/upsert_validator/validator_election_vote.py

@@ -1,4 +1,6 @@
-import base58
+# 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.transaction import Transaction
 from bigchaindb.common.schema import (_validate_schema,
@@ -26,7 +28,7 @@ class ValidatorElectionVote(Transaction):
             bigchain (BigchainDB): an instantiated bigchaindb.lib.BigchainDB object.
 
         Returns:
-            `True` if the election vote is valid
+            ValidatorElectionVote object
 
         Raises:
             ValidationError: If the election vote is invalid
@@ -34,10 +36,6 @@ class ValidatorElectionVote(Transaction):
         self.validate_transfer_inputs(bigchain, current_transactions)
         return self
 
-    @classmethod
-    def to_public_key(cls, election_id):
-        return base58.b58encode(bytes.fromhex(election_id))
-
     @classmethod
     def generate(cls, inputs, recipients, election_id, metadata=None):
         (inputs, outputs) = cls.validate_transfer(inputs, recipients, election_id, metadata)

bigchaindb/upsert_validator/validator_utils.py

@@ -0,0 +1,37 @@
+import codecs
+
+from abci.types_pb2 import (Validator,
+                            PubKey)
+from bigchaindb.tendermint_utils import public_key_to_base64
+
+
+def encode_validator(v):
+    ed25519_public_key = v['public_key']
+    # NOTE: tendermint expects public to be encoded in go-amino format
+    pub_key = PubKey(type='ed25519',
+                     data=bytes.fromhex(ed25519_public_key))
+    return Validator(pub_key=pub_key,
+                     address=b'',
+                     power=v['power'])
+
+
+def decode_validator(v):
+    return {'pub_key': {'type': v.pub_key.type,
+                        'data': codecs.encode(v.pub_key.data, 'base64').decode().rstrip('\n')},
+            'voting_power': v.power}
+
+
+def new_validator_set(validators, height, updates):
+    validators_dict = {}
+    for v in validators:
+        validators_dict[v['pub_key']['data']] = v
+
+    updates_dict = {}
+    for u in updates:
+        public_key64 = public_key_to_base64(u['public_key'])
+        updates_dict[public_key64] = {'pub_key': {'type': 'ed25519',
+                                                  'data': public_key64},
+                                      'voting_power': u['power']}
+
+    new_validators_dict = {**validators_dict, **updates_dict}
+    return list(new_validators_dict.values())

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.