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https://github.com/lukasz-zimnoch/ipfs-market
Example repository intended to demonstrate a simple digital goods trading system powered by Ethereum smart contracts, IPFS file system and some basic cryptographic algorithms.
https://github.com/lukasz-zimnoch/ipfs-market
blockchain cryptocurrency cryptography ethereum go ipfs solidity
Last synced: 24 days ago
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Example repository intended to demonstrate a simple digital goods trading system powered by Ethereum smart contracts, IPFS file system and some basic cryptographic algorithms.
- Host: GitHub
- URL: https://github.com/lukasz-zimnoch/ipfs-market
- Owner: lukasz-zimnoch
- Created: 2020-04-09T11:17:20.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2020-10-02T12:25:33.000Z (about 4 years ago)
- Last Synced: 2024-01-20T04:10:08.514Z (11 months ago)
- Topics: blockchain, cryptocurrency, cryptography, ethereum, go, ipfs, solidity
- Language: Go
- Homepage:
- Size: 131 KB
- Stars: 3
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.adoc
Awesome Lists containing this project
README
= ipfs-market
Example repository intended to demonstrate a simple digital goods trading
system powered by Ethereum smart contracts, IPFS file system
and some basic cryptography algorithms.
Specifically, the system distinguishes two actors, the *publisher*
and the *purchaser*. Going down to the use cases:
* A publisher can:
** publish an encrypted file to the IPFS file system and put it on sale using
an Ethereum smart contract
** watch incoming purchase requests, answer them and withdraw the payment
after successful purchases
* A purchaser can:
** purchase a file using their IPFS content identifier (CID)
Technically, there are several major parts:
* An off-chain CLI application which can operate in different modes
(publish, watch and purchase) to handle the use cases of both actors.
It is responsible for encryption and decryption of the files and
interacts with the Ethereum chain and the IPFS file system.
* An Ethereum smart contract which manages all purchase transactions
and acts as an escrow for funds
* The IPFS file system which stores the encrypted files in a distributed manner
== Prerequisites
Make sure you have the following prerequisites installed on your machine:
* Go 1.13+
* Node.js v12.18.4+
* GNU Make 3.81+ (optional, commands from the `Makefile` can be invoked by hand)
* Local or remote IPFS node
== How to run
There is a demo script which makes an end-to-end execution of the entire flow.
To run it, you need to go through several simple steps:
. https://ipfs.io/#install[Install] and run a local IPFS node (or use a remote one).
In case you need to customize the IPFS url, you can do it by setting the `storage.url`
property in the publisher and purchaser config files placed in the `config` directory.
. Run the local Ethereum node by invoking:
+
```
make run-ethereum
```
After that, a local Ethereum node powered by Ganache will be up and running.
. Deploy the smart contracts:
+
```
make deploy-contracts
```
. Run the demo script:
+
```
make demo
```
The whole publish and purchase flow will be executed.