Troy McConaghy abdd23f5a6 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 -*-
2018-08-16 12:31:32 +02:00

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<!---
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 and Byzantine Fault Tolerance
[BigchainDB Server](https://docs.bigchaindb.com/projects/server/en/latest/index.html)
uses [Tendermint](https://tendermint.com/)
for consensus and transaction replication,
and Tendermint is [Byzantine Fault Tolerant (BFT)](https://en.wikipedia.org/wiki/Byzantine_fault_tolerance).