Hi there,
I got some requests to re-record the tutorial talk I gave at DevCore 2015,
"How to build a timestamping smart contracts app in 30 minutes". It's now
available here:
https://bitcoinj.github.io/document-timestamp-app
It covers:
- How to customise the wallet-template app for this use case
- How to construct a complex multi-stage SPV proof of block chain
inclusion
- How to save and then verify proof files
- How to bind transaction confidence state to the user interface
- How to create a Mac DMG bundle with a custom icon
I hope someone finds it enjoyable!
On Thu, Apr 9, 2015 at 10:23 PM, Mike Hearn <m...@plan99.net> wrote:
> Next week on April 15th Gavin, Wladimir, Corey and myself will be at
> DevCore London:
>
> https://everyeventgives.com/event/devcore-london
>
> If you're in town why not come along?
>
> It's often the case that conferences can be just talking shops, without
> much meat for real developers. So in the afternoon I'll be doing two things:
>
> 1. Running a hackathon/workshop type event. The theme is contracts,
> but we can hack on whatever you all feel like.
>
> 2. My "talk" will actually be a live coding event. Writing contracts
> apps has become a lot easier in the past few years, and to prove it to you
> I will write a decentralised cross-platform Tor supporting document
> timestamping app that uses OP_RETURN outputs and has a nice GUI ..... in 30
> minutes, on stage.
>
> Don't think it can be done? Turn up and see for yourself.
>
> See you there!
>
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