BigchainDB_A_scalable_blockchain_database.pptx

BigchainDB
A scalable blockchain database
ALI RAJAB

BigchainDB
-
A big data distributed database has some of blockchain characteristics
:
-
Decentralization : no one owns or controls a network
.
-
Immutability : data once stored can’t be deleted or changed
.
-
Owner-controlled assets : only the owner can create and transfer the asset
ownership to a new owner
.
-
Store any kind of data, but it’s designed to be particularly suitable for storing
assets (car, house, data set)
.

Decentralization
-
Each node has its own local MongoDB database
.
-
All Communication between nodes is done using Tendermint protocol
.
-
Tendermint protocol is used for consensus and transaction replication
.
-
Tendermint is Byzantine Fault Tolerance
.
No single point of failure

Immutability
-
Every node has a full copy of all the data in a standalone MongoDB
database
.
-
Every block has an id equal to the hash of its transactions,
timestamp, voters list and public key of node creator
.
-
All transactions are cryptographically signed
.
-
No APIs to change or erase stored data
.

Owner-controlled assets
-
Users can create as many assets (divisible or indivisible) as they need
.
-
All assets created by the user are cryptographically signed by his private key
.
-
Only the owner of an asset can transfer that asset
.

BigchainDB Use Cases
-
BigchainDB used in almost all the scenarios where there is a need of
immutable and tamper-proof storage of data assets at high throughput with
ability to search and query like
:
-
Supply Chain
-
Digital Twins and IoT
.
-
Identity
.
-
Intellectual Property

Case Study : Supply Chain Management in
Agriculture Using Blockchain and IoT
-
Assets are digitally stored in BigchainDB
.
-
Every asset will have its digital twin with a public key and private key
.
-
All the assets can be tracked using the public key
.
-
The assets can be anything: tomatoes, mangoes, milk products, etc
.
-
All the transactions between the stackholders are recorded in this way any
malpractice or dishonest handling of the asset can be caught
.
-
IoT devices are used to update the real-time quality and transit time of the
product
.
-
Consumers can scan the QR code using the mobile application and then all the
transactions of the asset will be retrieved with perfect data analytics
.

BigchainDB Transactions
-
In BigchainDB transactions are used to register, issue, create or transfer assets
.
-
There are two kinds : CREATE transactions and TRANSFER transactions
.
-
A CREATE transaction : to register any kind of asset(divisible or indivisible)
.
-
A TRANSFER transaction : to transfer the asset ownership to a new owner
.

CREATE Transaction
-
To create a new asset user must do the following
:
1
-
Generate a pair of public/private key
.
2
-
Define the asset
.
3
-
Define metadate contains information about the asset (OPTIONAL)
.
4
-
Construct a transaction payload that includes : an asset - asset metadata
- transaction output
.
5
-
Sign the transaction using the asset owner private key
.
6
-
Send the transaction to a BigchainDB network
.

TRANSFER Transaction
:
-
To transfer the asset ownership to a new owner the asset owner must
construct a TRANSFER transaction and prepare it with the following
:
1
-
Signed Transaction
2
-
Transaction output include a new owner public key
.
3
-
.
-
User can use a BigchainDB driver(software package) to create valid
transactions, generate key pairs, sign transactions and post the
transaction to the BigchainDB API
.

Example : Create and Transfer an asset
using BigchainDB JavaScript driver
-
Install BigchainDB JavaScript driver package
:
npm install bigchaindb-driver
-
Import BigchainDB driver
:
const driver = require(‘bigchaindb-driver’)
-
Generate a pair of public/private key
:
const alice = new driver.Ed25519Keypair
)(
-
Create a connection with BigchainDB
:
const connection = new driver.Connection('https://test.ipdb.io/api/v1/')

-
Asset creation
:
driver.Transaction.makeCreateTransaction
(
‘ {
painting’ : { ‘name’ : ‘Monaliza’ , ‘year’ : ‘2021’}
,}
‘{
Country’ : ‘Syria
,}’
[
driver.Transaction.makeOutput
(
driver.Transaction.makeEd25519Condition(alice.publicKey)
,])
alice.publicKey
)
-
Sign the transaction with private key of Alice
:
driver.Transaction.signTransaction(alice_transaction,alice.privateKey)

-
:
connection.postTransactionCommit(signed_transaction)
-
Transfer asset ownership to bob
:
driver.Transaction.makeTransferTransaction
(
{[
signed_transaction, output_index:0
,]}
[
driver.Transaction.makeOutput
(
driver.Transaction.makeEd25519Condition(bob.publicKey)
,])
‘{
Country’ : ‘Italy
)}’

References
-
Borah, Malaya & Naik, Vadithya & Patgiri, Ripon & Bhargav, Aditya & Phukan, Barneel. (2019).
Supply Chain Management in Agriculture Using Blockchain and IoT. 10.1007/978-981-13-8775-3_11
.
-
BigchainDB. BigchainDB 2.0 – The Blockchain Database, May 2018
.
https://www.bigchaindb.com/whitepaper/
-
MCCONAGHY, Trent, et al. Bigchaindb: a scalable blockchain database. white paper,
BigChainDB, 2016
.
-
BigchainDB. BigchainDB Documentation
.
https://docs.bigchaindb.com/en/latest/

BigchainDB_A_scalable_blockchain_database.pptx

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