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

v0.6.2 (Pacific)

This release is a major upgrade from 0.5.x, and the code name for this release is Pacific. It contains the incompatible change in the logic of state transition, and will be activated from block height 432001 on mainnet (but 1 on testnet). In addition to some bug fixes, this release majorly contains the following changes:

• Fix the double gas fee on contract deployment and execution;
• Add new RPC APIs to query and subscribe raw blocks;
• Avoid signing asynchronous contract read request;
• Improve BFT consensus pre-commit state handling;
• Migrate project from go dep to go mod;
• Use golang 1.12.5 compiler by default (but still compatible with ≥ 1.11.5);
• Remove native voting protocol from the codebase.

v0.6.1

Update sanity check for API range queries (#1203)

v0.5.2

This is a minor release, which only involves ioctl changes:

• Executing contract view functions out of the block production cycle;
• Supporting overwrite semantics for account createadd;
• Avoiding password check when deleting an account locally.

v0.5.1

This is a minor release without breaking changes. In this release, we majorly:

• Fix account deletion and print action timestamp in ioctl;
• Make test account will not be merged into genesis by default;
• Improve the election lock granularity to prevent holding block process.

v0.5.0 (MainNet Alpha)

This is the official release for IoTeX blockchain mainnet alpha. In this release, we baked the blockchain which is consisted of the following components:

• Networking layer enables the peer-to-peer communication between IoTex nodes

• Blockchain APIs (through GRPC) allows applications and users to interact with blockchain.

• Ioctl allows users to interact with blockchain in console.

• Consensus runs Roll-DPoS algorithm to select the active consensus delegates among a pool of delegates (who are elected via staking and voting on Ethereum).

• Account protocol processes native IOTX token transfer.

• Ethereum virtual machine (EVM) with smart contracts written in Solidity enables developers to seamlessly port existing DApps here.