Conflux v2.0.2-testnet

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.

Improvements

RPC Improvements

• Improve the performance of eth_getLogs.
• Add a new RPC eth_getAccountPendingTransactions to get pending transactions by address, also return the first pending transaction's pending reason.
• Support WebSockets for eth APIs.
• Support block hash param for eth_call (EIP1898).
• cfx_call, cfx_estimateGasAndCollateral, eth_call, and eth_estimate will respect from's balance if passed, if balance is not enough will return error. If from is not passed then use a random one, which's balance will be very big.

Transaction Pool Improvements

• Set the minimum gas price to 1 GDrip by default for packing transaction

Storage Improvement

• Improve the snapshot copy-on-write merging performance on XFS file systems.

Bug Fixes

• Fix trace validity for transactions reverted in the top checkpoint.
• Fix phantom trace length mismatch issue with failed transactions.
• Fix a possible underflow crash in eth_estimateGas.