The slide used for Vreath meetup in January, 2019 [whitepaper] https://github.com/Vreath-core/Documents/blob/master/Vreath_white_paper_2018_12_19.pdf

1. Vreath
~ Bring Cryptocurrency to Everyone ~

2. self‐introduction
Sora Suegami
Vreath Founder
Me: @SoraSue77
Meetup:@vreath

3. What happens
when anyone has
cryptocurrency?

4. Why is
cryptocurrency not
popular?

5. High hurdles to get
cryptocurrency at
first

6. How to get cryptocurrency
① Register for an exchange ② KYC
③ Confirm residence
⑤ Buy cryptocurrency ⑥ Remit cryptocurrency
to a wallet app
④ Deposit money in
an exchange

7. It costs much time!

8. Get cryptocurrency
within a few minutes

9. Zero Access Barrier

10. All smartphone users
become
cryptocurrency users

12. Value Breath
Our Mission

14. Availability Solutions
Proof of Unit

15. Existing way to distribute fees
winner-take-all

16. Vreath way to distribute fees
Share fees with all miners

17. Validator
Buy Stake
Proof of Unit
New
Block
UnitsMiner
Parallel
mining

18. Proof of Unit
Validator

19. Proof of Unit
Validator

20. Proof of Unit
Validator

21. Proof of Unit
Validator

22. Make
Cryptocurrency
Easily Available
Proof of Unit

24. New Concepts
1. Token Base
2. Request Tx & Refresh Tx
3. Unit with Parallel Mining

26. Token Base
Any
State
• nonce
• token
• owner
• amount
• data
Token State

27. Token Base
Pure Function Style
Input
Data
Base
State
input
Smart
Contract
output
Output
State

28. Token Base
EVM Style
owner: Alice
amount: 100

29. Token Base
EVM Style
owner: Alice
amount: 50

30. Token Base
Pure Function Style
owner: Alice
amount: 100

31. Token Base
Pure Function Style
owner: Alice
amount: 100
owner: Alice
amount: 50

32. Token Base
Pure Function Style
owner: Alice
amount: 50

33. Token Base
Input State limitation
Alice’s
State
input
Smart
Contract
output
Bob’s
State

34. Token Base
Input State limitation
Alice’s
State1
input
Smart
Contract
output
Alice’s
State2
Bob’s
State1
input
Smart
Contract
output
Bob’s
State2
Parallelize
State
Change

36. Request Tx & Refresh Tx
Request Tx
States
Alice Bob
10-5 5+5
Requester

37. Request Tx & Refresh Tx
Refresh Tx
States
Alice Bob
5 15
Refresher
Your request is
valid.
I’ll change
balances!

38. Request Tx & Refresh Tx
Need mining for refresh tx!
Refresher Address
Output State
Request Tx Info
nonce
Hash <= Target

39. requester refresher
Request Tx & Refresh Tx
incentive

40. requester refreshers
Request Tx & Refresh Tx
incentive

41. requester
Fastest
refresher
Request Tx & Refresh Tx
incentive

42. All refreshers did mining
Request Tx & Refresh Tx

44. Unit with Parallel Mining
Extract Unit
Refresh
Tx
Refresher Address
Output State
Request Tx Info
nonce

45. Unit with Parallel Mining
Miners
Parallel
Mining Units

46. We need Scalability

47. Scalability Solutions
Child Chains

48. Child Chains ≒ Plasma
Many trustful chains
refresh states
Chain administrators who confirm
invalid transactions are

49. Child Chains
Main
Chain
Child
Chain
Submit
regularly
• Changed state address
• Address-hash map of new states
• Merkle root of input data
• Smart contract codes
• Administrators’ public keys
• Administrators’ signature

50. Fraud Proof
Invalid
Submission
Invalid
Output
State Hash
Input
Data
Base
State
Smart
Contract
Code
Valid
Output
State Hash
Submit
Raw data
Prove the
Existence

51. Fraud Proof
Judgment is Automatic

52. Child Chain Problems
No Challenger

53. Child Chain Problems
No Challenger
zk-SNARK
to prove valid state change

54. Vreath aims to be
Available Cryptocurrency
&
Scalable Blockchain

55. The World Wide
Common Value Basis

56. reath
Our Mission
ValueB

57. reath
Our Mission
V