Pharo-Blockchain

A minimalistic blockchain written in Pharo

Quick Start

Install

You can install Blockchain by executing the following load scripts:

Metacello new 
	repository: 'github://astares/Pharo-Blockchain:main/src';
	baseline: 'Blockchain';
	load 	

Use the blockchain

| blockchain |
blockchain := Blockchain new.
"Add some data"
blockchain addNewBlockWithData: 'First Block'.
blockchain addNewBlockWithData: 'Second Block'.
self assert: blockchain isValid.

"Manipulate the data"
blockchain chain second data: 'Manipulated'.	
self deny: blockchain isValid

Implementation

The Blockchain class represents individual blocks in the chain. Each block has:

• an index
• a timestamp
• data (which can be any object)
• the hash of the previous block
• its own hash

The Blockchain class manages the chain of blocks. It includes methods to:

• initialize the chain with a genesis block
• add new blocks
• validate the integrity of the chain