Ivan Sorokin

Grin contributor
Creator of Grin Mobile wallet Ironbelly
Co-organizer of Grin Berlin meetup

Grin

In-progress implementation of the Mimblewimble protocol written in Rust
No: ICO, CEO, DevCo, premines, pre...
Funded by donations, open source, community driven
Launched 2352 days ago, market cap ~ $9M

Key features

Elliptic Curve Cryptography
Confidential transactions
Fungibility
Scalability

It is impossible to distinguish this output from others

It is impossible to find matching input for this output

It is impossible to observe the amount in this output.

Fungibility is the quality of an item that makes it identical to another of the same kind

Only the block headers and the UTXO set is needed to validate the chain.

To keep the UTXO set minimal, fees are proportional to the number of outputs created in a transaction.

As a result it scales mostly with the number of users and minimally with the number of transactions.

but there are some challenges to overcome

Interactive transactions

Grin aims to be a minimal implementation of the Mimblewimble protocol, so an ecosystem is assumed to be built by the community

November 2018

Couple of months till the launch
No mobile wallet
Official CLI Grin wallet written in Rust

💡

Ironbelly

Named after a species of dragon - Ukranian Ironbelly. One of them guarded some of the oldest and deepest vaults in Gringotts.

Grincon0, Berlin, 9 Nov 2018

Rust + React Native

Both are cross platform (iOS & Android)
I have experience with React Native
Fast UI/UX experimenting

Short overview

Open source
Uses official `grin-wallet` source code
iOS version is available in TestFlight
Android version will be released soon
Withdrawal using File / HTTPS methods
Depositing using File only method

DEMO

Challenges

Some exchanges run outdated node/wallet software
Some exchanges support only HTTPS withdrawal
Files manipulation on iOS is hard :(
Interactive transaction is hard to understand for majority of the users
I'm no designer, so the app looks hm... :)
Project contributors list is very short

Want to test?

https://ironbelly.app

Thanks!

twitter/github/gitter/telegram: @i1skn

Find this presentation: https://i1skn.dev/talks/

Grin and Ironbelly