Blockchain code changes

Chiliz Chain is a fork of Binance’s 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.

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:

• The necessary required for the transition of Paribu Net into the Chiliz Chain. You can read more about the partnership details and the proposal in our blog and the August 2025: Pepper8 Proposal page here.

• The injection a deterministic deployment proxy at address 0x4e59b44847b379578588920cA78FbF26c0B4956C.

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.

• Hardfork & Network Upgrades: Introduced Bohr hardfork 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 lookup account/contract address details before fetching slot details for SLOAD and SSTORE operations.

April 2024: Chiliz Chain 2.2.1

Implementation of several hard forks:

• Chiliz Chain "Dragon8" hard fork:

  • New Chiliz Chain tokenomics.

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

  • BEP-319: Optimize the incentive mechanism of the Fast Finality feature

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

    • BEP-216: Implement EIP-3855 PUSH0 instruction

      • BEP-217: Implement EIP-3860 Limit and meter initcode

      • BEP-311: Warm COINBASE

      • BEP-312: Announce EIP-6049 Deprecate SELFDESTRUCT

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

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

    • BEP-225: Implement EIP-2565 ModExp Gas Cost

    • BEP-229: Implement EIP-2718 Typed Transaction Envelope

    • BEP-230: Implement EIP-2929 Gas cost increases for state access opcodes

    • BEP-231: Implement EIP-2930: Optional access lists

  • 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.

May 2023: Chiliz Chain 2.0.0 launch

• BSC "Bruno" hardfork (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