blockchain - [ IRIS python ]

blockchain IRIS - ( Embedded Python )

Example of creating a financial blockchain Using Embedded Python on IRIS Data Platform

What is a blockchain

Blockchain is a chain of blocks, where each block contains information from the previous block, this concept can be applied in many ways.

What is a blocks?

Block will be composed of: a datetime, index, content, hash and the hash of the previous block.

In this project the blocks are constructed by:

1. index:
   • block identification index in the chain
2. timestamp:
   • block creation datetime
3. transactions:
   • Financial transactions that are part of this block, represents the content of the block, you can change the structure by changing the dc.Blockchain.Blockchain classmethod newTransaction
4. hash:
   • the entire contents of the encrypted block
5. nonce:
   • value that the system finds by the mining process, changing the hash value when the block is generated.
6. previousHash:
   • hash of the previous block

Prerequisites

Make sure you have git and Docker desktop installed.

Installation

Clone/git pull the repo into any local directory

$ git clone https://github.com/Davi-Massaru/blockchain_Iris_python.git

Open the terminal in this directory and run:

$ docker-compose build && docker-compose up -d

Run the endpoint curl http://localhost:52773/api/blockchain/ping to verify the connection to the server

Get Started

After installing the application, you can access the end-points to better understand how it works

1. http://localhost:52773/api/blockchain/chain [ GET ]

Returns the current state of blockchain

Response sample:

2. http://localhost:52773/api/blockchain/transactions/new [ POST ]

Add a new transaction to be computed in a block, and return which block the transaction will be added

Request Content:

{
	"sender": "user 1",
	"amount": 1.42,
	"recipient": "user 2"
}

Response sample:

3. http://localhost:52773/api/blockchain/mine [ GET ]

Start mining a new block that will be added to the chain, returns added block information

Response sample:

4. http://localhost:52773/api/blockchain/block/{index} [ GET ]

Returns block information, in the given index

Response sample:

Exploring the blockchain

You can better understand and track global content and transactions through the portal.

Access http://localhost:52773/csp/sys/exp/UtilExpGlobalView.csp?$ID2=GBlockchain&$NAMESPACE=USER&$NAMESPACE=USER to see all blockchain content.

Access http://localhost:52773/csp/sys/exp/UtilExpGlobalView.csp?$ID2=GTransactions&$NAMESPACE=USER&$NAMESPACE=USER to see all transactions made and in which blocks were mined

References:

• https://python.plainenglish.io/implementing-a-smart-blockchain-with-python-3183e0c1052e
• https://www.activestate.com/blog/how-to-build-a-blockchain-in-python/
• https://geekflare.com/create-a-blockchain-with-python/