• Fix a bug that can, under very rare circumstances, cause some transactions to get stuck.
• Limit rpc state query to accounts with size below 50kb to prevent abuse.

• Fix an issue with execution outcomes that causes rpc tx endpoint to time out.

Note: this fix is only relevant for rpc nodes and does not affect validator nodes.

Fixes:

• Address slowness of the validator rpc endpoint (#3960)
• Implement FramedWriter with buffer limits and stats (#4012)
• Fix some state sync related issues that may cause node to crash or have high cpu usage (#4016, #3988, #3986)
• Fix an issue that may cause the network the slow down temporarily (#4116)
• Mitigate an issue that may cause some nonvalidating nodes to stall (#4102)

• Fix an issue that may cause nodes to crash on state sync

Fix an issue that may cause some nodes to get stuck

• Implement FramedWriter with buffer limits and stats (#4012)
• Address slowness of the validator rpc endpoint (#3960)
• Throttle state sync requests (#4016)

Features

• Reduce storage cost by 10x (#3881)
• Add rpc to query the current protocol config (#3919)
• Add a rpc endpoint to query receipts (#3883)

Fixes

• Speed up routing table computation (#3882, #3891)
• Fix high cpu usage caused by a bug in tokio 0.2 (#3869)
• Reduce lock contention on trie view cache (#3879)

• Introduce a new rpc endpoint EXPERIMENTAL_protocol_config to prepare for the next release that changes storage cost config.

• Fix a bug in performance_stats that can cause node to crash occasionally (#3915)
• Add logging in rpc for timeouts (#3969, #3981)

• Speed up date routing table computation (#3882)
• Add rpc to query protocol config (#3919)