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Blockchain code changes

Chronological log of all Chiliz Chain code merges from Ethereum and BSC, including the Snake8, Pepper8, and Dragon8 hard fork changes.

Chiliz Chain is a fork of BNB Smart Chain (BSC), which is itself a fork of Ethereum.

The Chiliz Chain team pays close attention to the evolution of both Ethereum and BSC in order to include the important changes that they receive.

Here are all the changes that we merged into the Chiliz Chain codebase so far, from latest to oldest.

June 2026: Chiliz Chain 2.8.1

This update brings Chiliz Chain in sync with BSC Chain and the latest Ethereum hardforks: Tycho (Cancun) and Pascal (Pectra/Prague).

Key updates include:

  • Cancun (Tycho) Integration: Enables blob transactions for cost-efficient data availability, and optimizes gas via transient storage and faster in-contract memory operations, ensuring EVM tooling parity.

  • Native Account Abstraction: Pectra's EIP-7702 allows standard Externally Owned Accounts (EOAs) to temporarily execute as programmable smart contracts without requiring users to migrate to new addresses.

  • Advanced UX Primitives: EIP-7702 integration directly unlocks atomic transaction batching, sponsored gas execution, ERC-20 fee abstraction, and social recovery capabilities for everyday wallets.

  • Agent-Ready Delegation: Provides the backend primitives for AI or automated actors via session permissions, enabling strict on-chain rules (spend caps, allowed actions, time windows) for safe delegation.

These hard fork are set to active at these times:

  • Cancun: Tuesday June 30th 2026 at 11:00:00 CEST

  • Pectra: Tuesday June 30th 2026 at 11:30:00 CEST.

GitHub link.

May 2026: Spicy Testnet 2.8.0-rc1

GitHub link.

April 2026: Chiliz Chain 2.7.3

GitHub link.

October 2025: Chiliz Chain 2.6.0 (SNAKE8 Hard Fork)

The SNAKE8 hard fork introduces an improved Validator Reward Distribution logic.

Read more about it here:

October 2025: Snake8 Hard Fork

GitHub link with full details.

September 2025: Chiliz Chain 2.5.1

This version fixes an invalid metric type error seen in Prometheus.

GitHub link with full details.

August 2025: Chiliz Chain 2.5.0 (PEPPER8 Hard Fork)

PEPPER8 introduces two main changes:

GitHub link with full details.

January 2025: Chiliz Chain 2.3.1

This version brings all bug fixes and improvements from BSC 1.4.3 to 1.4.13.

Key updates include:

  • Consensus (Parlia) enhancements: Improved snapshot recovery, support for consecutive block production, and adjusted mining/backoff times.

  • Hard fork & network upgrades: Introduced Bohr hard fork for Testnet, Tycho (Cancun) upgrades for Mainnet, and other scheduled network transitions.

  • Performance & pruning: Optimized state pruning (including prunefreezer fixes), enhanced multi-database support, and improved chain commit performance.

  • MEV & bidding Improvements: Added rate limiting, enhanced bidding logs, and integrated new MEV parameters/functions.

  • Tooling & testing: New developer tools and flags for controlling block intervals, additional logging/metrics (including blob transaction support), and stability fixes in tests.

GitHub link with full details.

December 2024: Spicy Testnet 2.3.0

Backporting latest features and bug fixes from BSC and Ethereum.

GitHub link.

August 2024: Chiliz Chain 2.2.3

Fixed EffectiveGasPrice only containing Tip Fee.

GitHub link.

July 2024: Chiliz Chain 2.2.2

  • Fixed debug_trace* RPC JSON API methods:

    • Updated the Trace API method handlers to support tokenomics system transactions.

    • Updated stateAtTransaction method in ETH state accessor to correctly handle the execution of tokenomics system transactions on "cold access".

    • Updated CaptureState method of prestate tracer to look up account/contract address details before fetching slot details for SLOAD and SSTORE operations.

GitHub link.

April 2024: Chiliz Chain 2.2.1 (DRAGON8 Hard Fork)

Implementation of several hard forks:

  • Chiliz Chain "Dragon8" hard fork:

  • BSC "Kepler" hard fork (from 2024/01/23):

  • BSC "Hertz" hard fork, including "HertzFix" (from 2023/08/30):

    • Includes part of Ethereum’s "Berlin" Upgrade:

    • Includes part of Ethereum’s "London" Upgrade:

      • BEP-227: Implement EIP-3198: BASEFEE opcode

      • BEP-226: Implement EIP-1559 with base fee of 2500

        • Of note: For Chiliz Chain’s implementation of EIP-1559, unlike BSC we set the initial base fee to 2500 gwei so that it behaves similarly to Ethereum. On BSC the base fee is 0.

      • BEP-228: Implement EIP-3541: Prevent deploying contracts starting with 0xEF

      • BEP-212: Implement EIP-3529: Reduction in Refunds

    • BSC "Planck" hard fork (from 2023/04/12):

      • BEP-171: Security Enhancement for Cross-Chain Module

      • BEP-172: Network Stability Enhancement On Slash Occur

    • BSC "Gibbs" hard fork (from 2022/12/12):

      • BEP-153: Introduce Native Staking on BSC

    • BSC "Moran" hard fork (from 2022/10/12):

      • Fix the exploiter attack (emergency, no BEP)

    • BSC "Nano" hard fork (from 2022/10/06):

      • Suspend CrossChain between BC & BSC due to the exploiter attack (emergency, no BEP)

Of note: We are still studying the enablement of the following hard forks: Luban, Plato, Euler. Their code is present in the Chiliz Chain codebase, but not yet enabled.

GitHub link.

June 2024: Spicy Testnet 2.2.0

GitHub link.

June 2024: Spicy Testnet 2.10

GitHub link.

May 2024: Chiliz Chain 2.0.8

GitHub link.

May 2024: Chiliz Chain 2.0.7

GitHub link.

May 2024: Chiliz Chain 2.0.6

GitHub link.

May 2024: Chiliz Chain 2.0.5

GitHub link.

May 2024: Spicy Testnet 2.0.4

GitHub link.

April 2024: Spicy Testnet 2.0.3

GitHub link.

April 2024: Spicy Testnet 2.0.2

GitHub link.

February 2024: Chiliz Chain 1.5.6

GitHub link.

December 2023: Chiliz Chain 1.5.5

GitHub link.

December 2023: Chiliz Chain 1.5.4

GitHub link.

September 2023: Chiliz Chain 1.5.3

GitHub link.

August 2023: Chiliz Chain 1.5.2

GitHub link.

June 2023: Chiliz Chain 1.5.0

GitHub link.

May 2023: Chiliz Chain 1.4.0 (CC2 launch)

  • BSC "Bruno" hard fork (from 2021/11/30):

    • BEP-95: Real-Time Burning Mechanism

    • BEP-93: Diff Sync Protocol: Speed up node sync

  • BSC "MirrorSync" hard fork (from 2021/02/25):

    • Upgrade 3 system contract (no BEP): TokenManagerContract, TokenHubContract, RelayerIncentivizeContract

GitHub link.

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