chunfengSun

https://github.com/QuarkChain/pyquarkchain/blob/ed98f02fb253e606127d00b110554d5ba798489d/quarkchain/cluster/miner.py#L212 rootBlock还没广播给slave和插入到本地就去挖下一个root，势必导致下一个root大几率废块

some check about jsonRpc

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1: https://github.com/QuarkChain/pyquarkchain/blob/788672319a275013cd5d2ca4ebb1d27de575e4b8/quarkchain/cluster/master.py#L1163 need check? if one shard have not been created? 2: https://github.com/QuarkChain/pyquarkchain/blob/788672319a275013cd5d2ca4ebb1d27de575e4b8/quarkchain/cluster/jsonrpc.py#L568 if one shard have not been created? return shards which have be created?

Paralleled-tx: handle race

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- Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/okex/okexchain/blob/develop/CONTRIBUTING.md#pr-targeting)) - [ ] Linked to github-issue with discussion and accepted design OR link to spec that describes this work. - [ ]...

Para:optimize gorountine

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- Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/okex/okexchain/blob/develop/CONTRIBUTING.md#pr-targeting)) - [ ] Linked to github-issue with discussion and accepted design OR link to spec that describes this work. - [ ]...

https://github.com/cosmos/gravity-bridge/runs/2861667656?check_suite_focus=true please fix it

https://github.com/QuarkChain/goquarkchain/blob/d21a01512bb700d0fb4e25fce7f3310016ceae6b/common/utils.go#L59 suggest read ip from config instead of this