Larry Salibra - Building a Decentralized App on Android

Transcript

1. A new internet for decentralized apps Building a Decentralized App on Android De/Centralize droidconBerlin 2018 2018-06-27 Berlin Larry Salibra
2. A new internet for decentralized apps About Me 1. Engineering Partner, Blockstack: 
 Blockstack Explorer (AngularJS) 
 Blockstack Browser (React/Redux/ES6)
 blockstack.js (ES6)
 Blockstack for macOS (Swift)
 Blockstack Android SDK (Kotlin) 2. Serial entrepreneur in South China:
 Mobile securities trading
 Crowdsourced software testing
 Remote language learning 3. Founding member, Bitcoin Association of Hong Kong twitter: @larrysalibra
3. A new internet for decentralized apps Agenda 1. Problems with the internet 2. What is a decentralized app? 3. What is Blockstack? 4. How do I build a decentralized app on Android? 5. Why should I build on Blockstack?
4. A new internet for decentralized apps Problems with the internet
5. A new internet for decentralized apps The internet didn’t turn out as we hoped 1. Honeypots and third party hacks 2. Tracking, data harvesting, and invasive ads 3. Cracked passwords and account compromises 4. Platform lock in for users and developers 5. Restrictions on platform data access 6. Power and profits go to the few
6. A new internet for decentralized apps Power
7. A new internet for decentralized apps “Power grows out of the barrel of a gun”
8. A new internet for decentralized apps Power grows out of Facebook
9. A new internet for decentralized apps It’s all about power 1. Power to make or break our careers 2. Power to track us 3. Power to deny us access to our data, apps & identity 4. Power to influence our emotions 5. Power to influence relationships with our closest family members & friends 6. Power to overthrow governments
10. A new internet for decentralized apps With great power comes great responsibility
11. A new internet for decentralized apps What are your users uploading today?
12. A new internet for decentralized apps Storing other people’s data comes with responsibilities
13. A new internet for decentralized apps Responsibility to the law • Is it legal? • Does the user own it? • Did the user give consent? • Can we delete it? • How to handle law enforcement requests?
14. A new internet for decentralized apps Responsibility to our users • Is user data safe from hackers? • …safe from state actors? • Are we imposing foreign culture or values? • Are we standing in the way of their success?
15. A new internet for decentralized apps Failing can be deadly
16. A new internet for decentralized apps No one person or company should have this much power. No one person or company should have this much responsibility.
17. A new internet for decentralized apps We can do better with decentralization
18. A new internet for decentralized apps Imagine 1. No data silos 2. No middlemen 3. No ads 4. No tracking 5. No passwords 6. No lock in
19. A new internet for decentralized apps Imagine Taking your friends and photos with you when you switch apps
20. A new internet for decentralized apps Imagine If someone has a problem with you, they have to come to you instead of going to a 3rd party.
21. A new internet for decentralized apps Imagine A world where the CEO of app you use to share your cat pics can’t also overthrow your government.
22. A new internet for decentralized apps Put users in control of their own data Remove trusted 3rd parties How to decentralize? Proper incentives
23. A new internet for decentralized apps Decentralized apps are told:
 • Where to store user data • How to encrypt user data • Who the user is • How to interact with other users Without middlemen What does this mean for apps?
24. A new internet for decentralized apps What is Blockstack?
26. A new internet for decentralized apps The Blockstack Stack • Atlas - content-addressable, self-healing, peer-to-peer network • Virtualchain - state engine on blockchain • Blockstack Name System - discover apps & interact with your friends • Gaia - decentralized storage, each user gets a hub • Stacks - token to register identities & apps • Stacks Blockchain - proof of burn blockchain • Browser - user identity and sign in to Blockstack apps • Blockstack SDKs - developer tools for decentralized identity, storage, cryptography, and blockchain
27. The Blockstack Network bitcoin node (bitcoind) blockstack node bitcoind peer connection rpc connection to bitcoind
28. A new internet for decentralized apps Blockstack handles the complexity { Authentication Storage Identity Naming Blockchain App App App
29. A new internet for decentralized apps What are the parts of a decentralized app?
30. A new internet for decentralized apps Authentication Encryption Storage
31. A new internet for decentralized apps Blockstack ID
32. A new internet for decentralized apps Generated from Secret Recovery Key
33. A new internet for decentralized apps Blockstack ID
34. A new internet for decentralized apps Blockstack ID
35. A new internet for decentralized apps Adding this to your Android app • Based on SDK v0.2.0 • Uses Kotlin • Requires that your app has a website
36. A new internet for decentralized apps Add Blockstack to your imports
37. A new internet for decentralized apps Create a Blockstack session This is caption only text
38. A new internet for decentralized apps Adding authentication in your app
39. A new internet for decentralized apps Adding authentication in your app
40. A new internet for decentralized apps Authentication Request Token
41. A new internet for decentralized apps Approve Authentication Request
42. A new internet for decentralized apps Authentication Response Token
43. A new internet for decentralized apps Add intent filter to manifest.xml
44. A new internet for decentralized apps Add handler for authentication response
45. A new internet for decentralized apps What do you get? • Globally unique identifier • Cryptographic proof of identity • App private key • Access to storage • Multi-player file sharing • Access to public profile
46. A new internet for decentralized apps App Private Key • Encrypted Gaia storage • Cryptocurrency wallets • Encrypting other data
47. Look Ma! Only 3 lines of code!
48. A new internet for decentralized apps Storage • Deterministic app-user specific buckets • Write by app-user • World readable • Backed by commodity cloud storage or local filesystem • Sharing with no trusted 3rd parties
49. A new internet for decentralized apps Adding Encrypted Storage to your App
50. A new internet for decentralized apps Reading a file
51. A new internet for decentralized apps Configuring storage
52. A new internet for decentralized apps Why build on Blockstack?
53. A new internet for decentralized apps Growing market for decentralized apps Global consumer attention around Privacy, Anonymity, and Data Portability Enterprises that want to own their own data App.co - New app store for dApps, better discoverability compared to traditional App Store.
54. A new internet for decentralized apps World class developer experience Reliable - World class underlying technology built by a dedicated team Serverless - no scaling costs Full suite of tools - Javascript API, iOS & Android SDKs Engaged Community - thousands of developers on Slack and forums
55. A new internet for decentralized apps App Rewards Mining First of its kind fund for incentivizing app development $1M / mo prize pool for awesome apps built on Blockstack. Huge incentive to get there first.
56. A new internet for decentralized apps We want you! World-class team: ~20 people in New York, Hong Kong, Seattle, Chicago, and West Africa
 
 World-class investors: Including Union Square Ventures, Naval Ravikant, Winklevoss Capital, Digital Currency Group, Kevin Rose, Michael Arrington Passionate community: 13,000+ developer community Lead our Android app & SDK!
57. A new internet for decentralized apps Thank you Twitter: @larrysalibra Email: larry@blockstack.com Docs blockstack.org Chat chat.blockstack.org Forum forum.blockstack.org Meetup meetup.com/topics/blockstack GitHub github.com/blockstack Telegram t.me/BlockstackChat