https://github.com/astares/pharo-blockchain

A minimalistic blockchain written in Pharo
https://github.com/astares/pharo-blockchain

Last synced: 3 months ago
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A minimalistic blockchain written in Pharo

• Host: GitHub
• URL: https://github.com/astares/pharo-blockchain
• Owner: astares
• Created: 2024-07-25T22:40:58.000Z (12 months ago)
• Default Branch: main
• Last Pushed: 2024-12-17T23:29:25.000Z (7 months ago)
• Last Synced: 2025-02-11T11:40:06.894Z (5 months ago)
• Language: Smalltalk
• Size: 17.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
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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