anders94 / public-private-key-demo Goto Github PK

Demonstrates public / private key pairs and signing in a blockchain context. This is part 2 of my Blockchain 101 video explainer.

License: MIT License

JavaScript 95.80% CSS 0.08% Dockerfile 0.02% Pug 4.10%

public-private-key-demo's Introduction

Publick Key / Private Key Demo

A web-based demonstration of public / private key pair concepts.

This is a very basic visual introduction to the concepts behind a public / private key pair, signing and their use in a blockchain context.

Setup

Get the code:

git clone https://github.com/anders94/public-private-key-demo.git

Install dependencies:

cd public-private-key-demo
npm install

Run the server:

./bin/www

Point a web browser at the demo:

http://localhost:3000

Send Thanks

Bitcoin greatfully accepted: 1K3NvcuZzVTueHW1qhkG2Cm3viRkh2EXJp

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public-private-key-demo's Issues

The meaning of the Seq field in the blockchain page

I have seen on your web in the blockchain page have a field named Seq. But I didn't know what does this mean. If you don't mind please help me

missing dependencies

Thanks for developing this wonderful tool for understanding and teaching blockchain! Since this second version is not available on your website anymore, I decided to host it myself - which really is straight forward. However, I had to install some additional modules, namely:

math-interval-parser
messageformat
mustache
sprintf-js

After manually installing them with npm install , everything worked like a charm. I guess one could add them to the dependency list? Thanks again for your great work!

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Private key finder ( script to generate your lost crypto address private key....

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docker-compose.yml

The signature is not written red although it's invalid when the sender/receiver is changed

This is a valid example-transaction at /blockchain:

When I edit the amount (in $), the signature gets invalid => signature is written red

But when I edit the sender or the reciever instead, the signature should also be invalid and be written red in my opinion (as it's invalid). That's not the case:

how to merge this demo into blockchain demo in one host listening on port 3000?

as title described.

Private key blockchain

What will be happened if I copy a transaction with signature ?

Hi @anders94 .
First of all, I want to say a huge thank for your amazing video. After watching it, I have a question. Could you help me explain it?
Let imagine, after you send me 5$ with a signature. I'll try to duplicate this transaction, the signature is still the same. It means, the transaction is still valid. Now, I get $10 after twice. How can I prevent that action? Thanks so much.