Mainnet 4 - Spork

December 16th, 2020

This is the first mainnet spork with intended for rewards. Participating nodes must register with the staking contract.

State Migrations

State migrations are used to transition the execution state to be compatible with breaking changes in Cadence and the Flow virtual machine. In exceptional cases, state migrations may be used to make state changes required for the continued functioning of the protocol.

Storage Usage Tracking

We will be tracking the storage usage, and keeping info about used storage inside the users account. This requires us to modify the account storage model slightly. This migration will make this addition to all existing accounts

Improvements

• Disable State Sync (#246) @zhangchiqing
• Stop verifying already sealed results (#250) @zhangchiqing
• Do not broadcast Execution Receipts if executed block is already sealed (#248) @zhangchiqing
• Extend safety check in FVM (#241) @ramtinms
• Add tool to remove Exe Fork (#243) @zhangchiqing
• Adding event limit per transaction (#128) @ramtinms