Investigation on EVMCC

EVM on Chaincode (EVMCC)

BurrowEVM is in inside of a Chaincode.

"Chaincode" is the Contract equivalent.

- A Chaincode is like AWS Lambda+CouchDB on the Docker.

201 commits (2019-11-15)

EVMCC has two uncertainty, and these are research questions.

1. Is "BurrowEVM" really compatible with EVM, and will actively be maintained?

- Gas model seems to be removed (because BurrowEVM can ban spams via permission black/whitelist)

- EVMCC source code says it can compile until pragma solidity ^0.5.0, and our OVM contract is also 0.5.0

- Qiita report says it could run on 0.4.25

- Burrow JS-API is an equivalent of Truffle

- Burrow JS-API's tests are written for Solidity 0.4.21

- At least we can make a wallet via burrow keys CLI command

- We can deploy via burrow deploy

2. Is "fab3" (=Self hosted Infura for EVMCC) compatible with our tools, and will actively be maintained?

- RPC interface compatibility seems fine with tests.

=> Does it guarantee ethers works fine with this???

- Compatible RPC are below

code:md

net_version

eth_getCode

eth_call

eth_sendTransaction

eth_accounts

eth_estimateGas

eth_getBalance

eth_getBlockByNumber

eth_blockNumber

eth_getTransactionByHash

eth_getTransactionReceipt

eth_getLogs

eth_getTransactionCount

- BurrowEVM explains ABI is working well even in on-chain env.

=>But not sure yet about

- Is an ethers-created wallet compatible with EVMCC

Instant Review

Conceptually, good.

What I do next:

- ethersjs compatibility test

- OVM Contract compatibility test

Hyperledger Sawtooth Ethereum (Seth)

This as well is using BurrowEVM

It's one of the Hyperledger family but not a Fabric subset.

5554 commits (2019-11-15)

Business Wise Review

EVMCC is better because of interaction capability with Fabric chaincodes. (If it works)

All EVMCC data is to be saved in CouchDB of a chaincode, and other chaincodes can read/write them with proper Access Control List.

- Both Fabric and EVMCC has instant finality hence Plasma on EVMCC as well has near-instant finality. Thus deposit/withdrawal as well is lightning fast interaction. This makes an enterprise acceptable framework where complex business logics such as industry specific financial process are on L1 and mass-market-consumer processes are on L2, and L1L2 interaction is lightning fast.

Links

HLF Architecture Docs

EVMCC

Fab3 Instruction Set

2019/3、web3-v0.27とsolidity-v0.4.25でのEVMCC動作確認

Hyperledger Sawtooth (Seth)

Hyperledger Burrow (Burrow EVM)