improve native staking stability

Introduced a fix to make native staking reliable for reading large amount of buckets

Fix native staking gas limit

Increase the gas limit when reading native staking contract, so program can read out native staking buckets as intended.

Fix bug in streamBlock API

• fix bug in streamBlock API which will block all streaming for one node
• not a mandatory upgrade for delegate

v0.10.0 (Dardanelles)

• Reduce block interval to 5s
• Other minor improvements

v0.9.2

• fix a bug could cause an API gateway node to crash when got an invalid API request
• fix an issue caused by eth fork back ago made our node fetch a different candidate list from what we had before at height 1,292,941
• NOT mandatory upgrade for delegates

v0.9.1

• fixed a bug we found in v0.9.0 may impact agreement between different version
• mandatory upgrade for delegates

v0.9.0 (Cook)

This release is a major upgrade from 0.8.x, and the code name for this release is Cook. The change will be activated from block height 1641601 on mainnet. After this block height, IoTeX token holders could stake the native tokens and use them to vote delegates.

v0.8.3 (Bering)

This release is a major upgrade from 0.7.x, and the code name for this release is Bering. The change will be activated from block height 1512001 on mainnet. Major details are listed bellow:

• Upgrade EVM version to Petersburg
• Support fine-grained EVM error status code
• Fix bugs in consensus and materialized the consensus state
• Partition blockchain data

v0.7.3 (Aleutian)

This is a minor upgrade with the following two fixes:

1. Remove the duplicate items in the action index
2. Fix the contract execution with 0 native token

v0.7.2 (Aleutian)

This release is a major upgrade from 0.6.x, and the code name for this release is Aleutian. There are a few significant improvements, and one of the biggest changes is increasing the epoch reward to 18,750 IOTX. The change will be activated from block height 864001 on mainnet and 294121 on testnet. More change details are listed bellow:

• Increasing epoch reward from 12,500 to 18,750
• Implementing bloom filters to index contract events
• Add GRPC streaming APIs to subscribe blocks and contract events
• Supporting XRC-20 commands in ioctl
• Non-blocking ethereum data sync on start
• Improving action index
• Fixing the bug of duplicate logs in contraction execution receipt