Towards Improved Plasma Constructions

All in one explanatory paper on Plasma Cash, featuring reference implementation at https://github.com/loomnetwork/plasma-cash

Protocols

• Deposit coin (either through approve-transfer for erc20/erc721 or with erc721 receiver)
• Send coin (offchain)
• Verify coin received protocol
• Exit
• Challenge Types, exit period windows etc.
• Withdrawal protocol

Functionalities

• Proof of Inclusion / Exclusion (optimized with default bitfield for SMTS)
• Signing a transaction
• Cryptoeconomic bonds to ensure valid behavior

Attacks

• Block Withholding
• Griefing (constant factor? unlimited?)

Future work

• Arbitrary denomination payments
  • Plasma Debit analysis
  • Plasma Defragmentation/Cashflow
  • Fast withdrawals
  • Proofs / formalization (maybe in this paper?)

Compiling/Editing

make. Cleanup repo with make clean

Generating figures

Requires dia

cd figures
python dia2pdf.py

Formatting

80 character width by default. There are a couple places where reflowing will break (primarily in figures where it's sensitive to linebreaks).