Conflux-Chain/conflux-rust v2.0.2-testnet-fix on GitHub

RPC Deprecation Announcement

Starting from v2.0.3, cfx_getLogs and eth_getLogs will no longer support the parameters limit and offset. They are not efficient and can be replaced by setting the block/epoch range instead.
Starting from v2.0.3, cfx_clientVersion will have include more information like web3_clientVersion in eSpace.
Starting from v2.0.3, fromEpoch will default to "latest_state" in cfx_getLogs.
Starting from v2.0.3, fromBlock will default to "latest" in eth_getLogs.

Fix some issues that cause cfx_estimateGasAndCollateral and cfx_call to hang.
Fix incorrect estimations from cfx_estimateGasAndCollateral.
Fix the issues that the node enters NormalPhase too soon and gets stuck on snapshot state download.
PoS nodes will not elect before entering the normal phase to avoid being force_retired.

If cfx_call, cfx_estimateGasAndCollateral raise error, and the error.data is string, it will directly return instead of being hex encoded.
cfx_sendRawTransaction will reject transaction if sender's balance is not enough.
More snapshot copy-on-write merging performance optimization on XFS file systems.