Pharo-Blockchain

Description

A minimalistic blockchain written in Pharo

Details

Source

GitHub

Dialect

pharo (25% confidence)

Created

July 25, 2024

Updated

Dec. 17, 2024

Categories

README excerpt

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# Pharo-Blockchain
A minimalistic blockchain written in [Pharo](https://www.pharo.org)

## Quick Start
### Install

You can install **Blockchain** by executing the following load scripts:

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

### Use the blockchain
```Smalltalk
| 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