Dev mode does not start with Parity node.

[sifnoc]

If --dev flag on, Plasma-evm rootchain Deploy Process does not work via Parity node.

There is worked well go-ethereum. @Jake-Song confirmed this.

System information

parity version: version Parity-Ethereum/v2.2.9-stable-5d5b372-20190203/x86_64-linux-gnu/rustc1.31.1
OS & Version: Ubuntu 16.04
Commit hash : develop commit b732d15

Expected behaviour

RootChain Contract deployed well.

Actual behaviour

RootChain Contract Deployed failed via plasma-evm dev mode.

Steps to reproduce the behaviour

Modified run.pls.sh as like below

build/bin/geth \
  --datadir $DATADIR \
  --miner.etherbase 0xcd433f027339ad4f86b94463d1b0416a86dc3705 \
  --dev \
  --rpc \
  --rpcport 8547 \
  --dev.key $KEY1,$KEY2,$KEY3,$KEY4,$KEY5 \
  --rootchain.operatorkey $OPERATOR_KEY \
  --rootchain.url http://[parity node ip]:8545

It was same does not work both http / ws endpoint.

Backtrace

Plasma-evm run log

INFO [02-14|06:15:25.130] Deploying contracts for development mode
INFO [02-14|06:15:25.312] Deploy epoch handler contract            hash=084d4a…86748b address=0x5ff3aFff10a4EfC1564f0B629B00a9BB6A9c29Ca
INFO [02-14|06:15:25.317] Wait until deploy transaction is mined
Fatal: Failed to deploy rootchain contract

Parity RPC trace log

2019-02-14 06:01:24 UTC  TRACE rpc  Request: {"jsonrpc":"2.0","id":8,"method":"eth_estimateGas","params" [{"data":"0x608060405234 ... , "from":"0xcd433f027339ad4f86b94463d1b0416a86dc3705","to":null,"value":"0x0"}

2019-02-14 06:01:24 UTC jsonrpc-eventloop-0 DEBUG rpc  Response: {"jsonrpc":"2.0","error":{"code":-32016,"message":"The execution failed due to an exception."},"id":8}.

[sifnoc]

Plasma-evm is communicating with rootchain node's event message.
So we should be careful, if makes compatible with parity.

One of the different thing between geth & parity

• There is same error but different error message
  • geth: nonce too low
  • parity: nonce is too low

I think this issue also cause by something kind of this.

So @4000D, @thomasHin and I discussed about making compatible with parity, about a month ago.
Result was "Not for now", we are using go-ethereum as rootchain a while, not parity.