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https://github.com/bigchaindb/bigchaindb.git
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86 lines
2.5 KiB
Python
86 lines
2.5 KiB
Python
"""This module provides the blueprint for some basic API endpoints.
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For more information please refer to the documentation in Apiary:
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- http://docs.bigchaindb.apiary.io/
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"""
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import flask
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from flask import current_app, request, Blueprint
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import bigchaindb
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from bigchaindb import util
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basic_views = Blueprint('basic_views', __name__)
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# Unfortunately I cannot find a reference to this decorator.
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# This answer on SO is quite useful tho:
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# - http://stackoverflow.com/a/13432373/597097
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@basic_views.record
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def record(state):
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"""This function checks if the blueprint can be initialized
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with the provided state."""
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bigchain_pool = state.app.config.get('bigchain_pool')
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monitor = state.app.config.get('monitor')
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if bigchain_pool is None:
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raise Exception('This blueprint expects you to provide '
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'a pool of Bigchain instances called `bigchain_pool`')
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if monitor is None:
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raise ValueError('This blueprint expects you to provide '
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'a monitor instance to record system '
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'performance.')
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@basic_views.route('/transactions/<tx_id>')
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def get_transaction(tx_id):
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"""API endpoint to get details about a transaction.
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Args:
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tx_id (str): the id of the transaction.
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Return:
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A JSON string containing the data about the transaction.
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"""
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pool = current_app.config['bigchain_pool']
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with pool() as bigchain:
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tx = bigchain.get_transaction(tx_id)
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return flask.jsonify(**tx)
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@basic_views.route('/transactions/', methods=['POST'])
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def create_transaction():
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"""API endpoint to push transactions to the Federation.
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Return:
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A JSON string containing the data about the transaction.
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"""
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pool = current_app.config['bigchain_pool']
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monitor = current_app.config['monitor']
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val = {}
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# `force` will try to format the body of the POST request even if the `content-type` header is not
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# set to `application/json`
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tx = request.get_json(force=True)
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with pool() as bigchain:
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if tx['transaction']['operation'] == 'CREATE':
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tx = util.transform_create(tx)
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tx = bigchain.consensus.sign_transaction(tx, private_key=bigchain.me_private)
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if not bigchain.consensus.verify_signature(tx):
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val['error'] = 'Invalid transaction signature'
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with monitor.timer('write_transaction', rate=bigchaindb.config['statsd']['rate']):
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val = bigchain.write_transaction(tx)
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return flask.jsonify(**tx)
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