RPC Improvements

• Implement debug_trace* RPCs for espace like geth.
• Implement eth_getBlockReceipts.
• Optimize core space debug and test namespace RPC methods.
• Optimize eSpace main RPC method error message.
• Make cfx_sendTransaction and cfx_signTransaction support 2930&1559 type transactions.
• Make eth_call and eth_estimate support revert custom error.
• Add espace fee history cache for the latest 1024 blocks to improve query performance.
• Support both input and data for CallRequest.
• Add reason for transaction pool replacement.
• Update core space RPC block.gasUsed behavior to express more info.
• Unset zero gas when calling espace estimate and call.

Note: The maximum gas value supported by the eth_estimateGas and eth_call RPC methods is set to 15 million by default. If the gas value exceeds this limit, an error will be returned. If a higher value is needed, it can be adjusted through the configuration option max_estimation_gas_limit. For example, it can be set to 30 million.

Storage Improvements

• Optimize state and account checkpoints.
• Rewrite state prefetcher.

Bug Fixes

• Fix espace zero gas_price estimate error issue.
• Change block gas_limit according CIP1559.
• Fix eth_estimate not checking if balance is enough for gas-fee issue when passing max-fee-per-gas.

Code Improvements

• Remove unnecessary unsafe codes.
• Refactor codes for better maintainability.