BoR // Book of Reputation

Entrance of our system
Client image of Our purpose
You can select other player to gift some honor prize
"Gift honor prize" UI of our React Web server
GIF
Demo animation

Inspiration

When we talk about blockchain + gaming, everybody thinks about in-game item portability but what about reputation portability? Gamers build reputation in one game but can't take it to another game with them!

Inspired by the notorious Warcraft 3 app "WC3 Banlist", we want to build a game agnostic whitelist / blacklist app and unbundle reputation from game publishers & merge it back with the user.

What it does

User logs in, sees a list of players they've interacted with in a game. User can honor them with badges, adding them to a whitelist or marks them with "toxic mark" to add them to a blacklist. The lists are privately stored on Cosmos storage. A friend of user can read the list if the user allows him to.

How we built it

We had a web system as code base of this challenge. It has one Backend REST-API server with Relational database written by Go language, and one Frontend web application written by Javascript+React.

We developed the followings with in 2 days;

New REST-API server with using Cosmos SDK.
- This is pretty new code by referring sdk-tutorial "nameservice".
- And we added new functions, they are not implemented yet even in Cosmos SDK.
- Sign Transaction function in Rest SDK API of cosmos SDK.
- Broadcast Transaction function in REST SDK API of Cosmos SDK,
Enhancement a "gift honor prize" function with GUI into Frontend web application.
Update model in backend system (updated user table to keep several parameters of blockchain)

Challenges we ran into

We investigated the tutorial of Cosmos SDK.
We implemented new REST API server with using Cosmos SDK.
We Enhanced "one click" functionality to create transaction, and sign to it, broadcast it.
- Create transaction exists as Cosmos REST API at this moment, but sign and broadcast function only exist as Cosmos CLI SDK.
- We hacked deep inside of the CLI codes of SignTx and BroadcastTx, and implement into our server.

Accomplishments that we're proud of

Our team members are pretty new for Cosmos SDK, but we create new REST API server with using Blockchain and Cosmos SDK.
We added new functions to sign transaction and broadcast transaction

What we learned

How to create blockchain REST API Sever.
How to design new model(KV store) into Cosmos blockchain node.
There are many good documents and tutorial codes in Cosmos github. ;-)
But several functions of go are not available for REST api server.

What's next for BoR

Build a client for PC that keeps track of users' Minecraft gaming-sessions and who they play with.
Push it to Minecraft players to validate the idea.
Explore Cosmos NFT's & IBC more in-depth.
Implement a Keybase-like identity protocol, so gamers can create a meta-identity tying their discord, twitch and game accounts together.