plasma checkpoint

This document is about possible design of checkpoint.

expensive checkpoint vs cheap checkpoint

Pros and Cons

Plasma XT

pros

checkpoint don't need all agreements inside the range requesting

cons

expensive(state root and signature bitmap)

Chamber Checkpoint

pros

cheap

cons

checkpoint require all agreements inside the range requesting

XT(expensive checkpoint)

checkpoint request

state merkle tree

block number

range

signature bitmap

steps

1. aggregate signatures

2. request checkpoint

3. users challenge showing latest transaction

respond by signature

respond by showing spend

after checkoint has been submitted

user can use checkpoint as deposit

cheap checkpoint

checkpoint request

block number

range

steps

1. aggregate signatures

2. request checkpoint

3. users challenge showing latest transaction

respond by signature

respond by showing spend

after checkoint has been submitted

user can challenge by too old transaction