Conflux Network Hardfork Upgrade List and RPC Changes Overview (June 24, 2025)

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Conflux is planning to activate and implement modifications of 8 different CIPs (improvement proposals), including CIP-150, CIP-151, CIP-152, CIP-154, CIP-156, CIP-165, CIP-645 and CIP-7702, as well as related RPC updates in the next Hardfork system upgrade.

For more details, please refer to: https://www.confluxdocs.com/docs/general/hardforks/v3.0

CIP Changes:

These CIPs are mainly divided into the following categories:

  • EVM Compatibility: CIP-150, CIP-151, CIP-152, CIP-165, CIP-645, CIP-7702

  • Bug Fix: CIP-154

  • Specification Adjustment: CIP-156

The following is a brief introduction of these CIPs.

CIP 150

This CIP replicates EIP-3541, which disallows deploying new code that starts with the 0xEF byte.

CIP 151

This CIP replicates EIP-6780, which prevents contracts from being destroyed by SELFDESTRUCT in most cases, with the only exception being the destruction of a contract within the same transaction as its creation.

CIP 152

This CIP replicates EIP-3607, which addresses a potential security issue where an EOA could share the same address as a contract due to a collision attack. Specifically designed EOAs with code (like EIP-7702), are not affected by this restriction.

CIP 154

This CIP addresses an implementation error in CIP-142, which incorrectly implemented the TLOAD opcode as SLOAD.

CIP 156

This CIP changes the penalty of PoS malicious behavior from permanent stake forfeiting to temporary stake locking.

CIP 165

Introduces precompiles for BLS12-381 curve operations as defined in EIP-2537, enabling efficient execution of tasks such as BLS signature verification.

CIP 645

This CIP proposes aligning Conflux eSpace’s behavior with Ethereum’s EVM to ensure compatibility with Ethereum development tools and provide a consistent experience for developers. It also addresses the impact of new EIPs on Conflux Core Space.

The following Ethereum Improvement Proposals (EIPs) are implemented or adapted:

Description Link
EIP-1108: Reduces gas costs for alt_bn128 precompile EIP-1108
EIP-1884: Reprices trie-size-dependent opcodes EIP-1884
EIP-2028: Reduces Calldata gas cost EIP-2028
EIP-2200: Rebalances net-metered SSTORE gas cost EIP-2200
EIP-2565: Reduces gas cost for modular exponentiation transactions EIP-2565
EIP-2929: Increases gas costs for opcode transactions to mitigate DDoS EIP-2929
EIP-3529: Removes gas refunds for SELFDESTRUCT and reduces SSTORE refunds EIP-3529
EIP-3651: Reduces gas fees for accessing COINBASE address EIP-3651
EIP-3860: Limits initcode size to 49152 EIP-3860

Additionally, this CIP addresses discrepancies found during Ethereum behavioral alignment tests, including:

CIP 7702

This CIP introduces EIP-7702 to Conflux eSpace.

RPC changelog

Below RPC add support for EIP-7702 tx:

  1. eth_call & eth_estimateGas

  2. transaction related RPCs: eth_getTransactionByHash, eth_blockByNumber, eth_blockByHash

Misc changes:

  1. Support gasFee in transaction receipt for espace RPC

  2. eSpace block.gasLimit change to half of the consensus gas limit, add block.espaceGasLimit to return the real gas limit for eSpace transactions.

  3. eSpace parity style trace RPCs updates:

    a. Trace RPC methods now compatible with parity and erigon, including trace_block, trace_transaction, trace_filter, this is a API breaking change

    b. Two new RPCs trace_get and trace_blockSetAuth are added

    c. trace_blockSetAuth is a Conflux specific RPC used to get the block set auth result, check trace doc for details.

    d. These trace methods now support SelfDestruct(Suicide) trace, to access historical selfdestruct transaction data, a resync of the data is required.

  4. eSpace now support geth style txpool namespace methods, including: txpool_status, txpool_inspect, txpool_content, txpool_contentFrom

  5. eth_call, eth_estimateGas add support for stateoverride feature.

Conflux v3.0.0-testnet Testnet Hardfork Upgrade Announcement（June 25, 2025）