L2 development workflow(DRAFT)

Introduction

This document is development workflow idea for building applications run on OVM client.

Quick getting started

Write verifyStateTransition

Developers can write business logic of their application by defining state transition

code:js

function verifyStateTransition(preState, transaction) {

// ...

return newState;

}

The interface of verifyStateTransitions are different between channel, Plasma and oprimistic rollup.

Choose claims from design patterns and setup your state transitions!

Plasma, Channel!

combine 2 transitions

fee&game

depending on other construction

e.g.) channel on Plasma,

conditional payment

substate model

offline swap

code:js

original_channel_claim() := channel_exit_claim(YourStateTransition)

original_plasma_claim() := IsDeprecated(YourStateTransition, FeeStateTransition)

Write frontend application!

code:js

const MyApp = require('MyApp');

const app = new MyApp()

app.claimExit()

app.query()

app.transfer() // <- predefined

app.atomicSwap() // <- predefined

app.check_fast_finality_merchant() // <- predefined

app.openChessGame() // <- your original!

app.grantToUser() // original

Connecting to existing L2 network

You can get L2 network endpoint from CEL development portal

code:js

More deeply

Generate smart contract

Automatically generating smart contract which has finalizeClaim for each claims

Solidity API

This component is provided as Solidity smart contract, user can inherit generated contract

Framework automatically transforms the claim to application specific data structure

code:js

contract MyDepositContract is DepositContract {

function finalize${claim_name}(decidedClaimObject: FinalizedObject) {

// decidedClaimObject is not Property, more application specific object

ERC20.transfer(decidedClaimObject.owner, decidedClaimObject.amount)

}

}

Conclusion