BigchainDB 2.0 - The Blockchain Database

May 4, 20181 like887 views

BigchainDB 2.0 has gone through some major changes. This presentation details the changes in the new release such as Byzantine Fault Tolerance.

1
The Blockchain Database
BigchainDB 2.0

A Finite State
Machine (FSM)
with 5 States

Problem:
Keep all Non-Faulty
FSMs in Sync

Changes in
BigchainDB
Transactions
#1
“version”: “1.0”
⬇
“version”: “2.0”

Changes in
BigchainDB
Transactions
#2
Hash-then-Fulfill
⬇
Fulfill-then-Hash

Changes in
BigchainDB
Transactions
#3 Sign the whole tx when
fulfilling each input.
⬇
The message-to-sign
differs for each input.

HTTP API
Changes
#1
POST /api/v1/transactions
⬇
POST /api/v1/transactions?mode=async
POST /api/v1/transactions?mode=sync
or
POST /api/v1/transactions?mode=commit

$HTTP API Changes #2 GET /api/v1/blocks/{block_id} ⬇ GET /api/v1/blocks/{block_height}$

$HTTP API Changes #3 Old Block Structure { "id": "<ID of the block>", "block": { "timestamp": "<timestamp>", "transactions": ["<List of transactions>"], "node_pubkey": "<Public key of node which created the block>", "voters": ["<List of public keys of all nodes in cluster>"] }, "signature": "<Signature of inner block object>" } New Block Structure { "height": height, "transactions": ["<List of transactions>"] }$

$HTTP API Changes #4 Goodbye: GET /api/v1/statuses?transaction_id={transaction_id} GET /api/v1/statuses?block_id={block_id} GET /api/v1/votes?block_id={block_id}$

HTTP API
Changes
#5
New endpoint:
GET /api/v1/validators

Command-Line Interface
(CLI) Changes
#1
$ bigchaindb -y configure localmongodb
$ bigchaindb -y configure rethinkdb
$ bigchaindb -y configure mongodb

CLI Changes
#2
Also gone:
$ bigchaindb export-my-pubkey
$ bigchaindb set-shards
$ bigchaindb set-replicas
$ bigchaindb add-replicas
$ bigchaindb remove-replicas

CLI Changes
#3
New:
$ bigchaindb upsert-validator PUBLIC_KEY POWER

Other Recent
Changes
AGPL v3 → Apache v2 license on all code.
New, more open process for contributing:
● Collective Code Construction Contract (C4)
● BigchainDB Enhancement Proposals (BEPs)

21
The Blockchain Database
BigchainDB 2.0

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