Core Blockchain (Core DAO): The Destination for Bitcoin Yield & Bitcoin Staking
Core Blockchain (Core DAO): The Destination for Bitcoin Yield & Bitcoin Staking
Core Theseus Hardfork Activation on Core Mainnet
3 min read · June 10, 2025
Core Theseus Hardfork Activation on Core Mainnet

The Core blockchain is geared up for the activation of the Theseus Hardfork, a major protocol upgrade focused on enhancing transparency, revenue sharing, and developer tooling. The hardfork was activated on Core Testnet2 on May 30, 2025, at 08:00 AM UTC. Following rigorous internal testing, the Theseus hardfork will be activated on Core Mainnet on June 25, 2025, at 08:00 AM UTC.

Theseus Hardfork Timeline

  • Core Testnet2: May 30, 2025 at 08:00 AM UTC

  • Core Mainnet: June 25, 2025, at 08:00 AM UTC

What's New in the Theseus Upgrade

The Theseus Hardfork introduces several key improvements to align incentives across stakeholders, increase protocol transparency, and support more sophisticated dApp models.

1. Protocol Level Fee-Sharing Model

The Theseus hardfork introduces an enhanced protocol-level fee-sharing mechanism that enables configurable revenue distribution directly to different stakeholders from transaction gas fees. Designed to accelerate stablecoin adoption, developer participation, and network activity, this mechanism provides enhanced incentives.

Key Capabilities

  • Protocol-native gas fee distribution triggered by contract events or functions

  • Governance-controlled configurable reward splits

  • Fully compatible with existing EVM contracts

  • Introduces no changes in the existing EVM execution layer

2. Live Chain Tracing with Hooks

With this hardfork, Core blockchain will now support native live tracing, allowing developers and monitoring systems to hook into transaction events in real-time. Ideal for advanced analytics, observability, and contract debugging.

3. Merged Up to Version v1.4.10

The Theseus hardfork also incorporates improvements and updates by merging versions up to v1.4.10 from BNB Smart Chain.

⚠️ Action Required

For Testnet Node Operators

The Theseus hardfork is a mandatory upgrade for all validators and full node operators, requiring all validators and full node operators on the Core blockchain must update their software versions.

For Core Testnet2

Validators and full node operators must upgrade to v1.0.16 before May 30, 2025, 08:00 AM UTC.

For Core Mainnet

Validators and full node operators must upgrade to v1.0.17 before June 25, 2025, 08:00 AM UTC.

For Developers and dApp Teams

There are no breaking changes for most wallets or dApps.

  • Apps using eth_estimateGas for transactions will continue to work as expected.

  • ⚠️ Caution: For dApps/wallets with hardcoded gas values (common in frameworks like Foundry, Hardhat, or Brownie), the devs will need to increase gas limits when interacting with contracts enabled for Core’s new incentive mechanism.

  • If using Foundry, use --gas-estimate-multiplier to increase the estimated gas limit. For scripts interacting with contracts configured for protocol-level incentives through this upgrade, a higher multiplier (200-500) may be needed.

  • Always use --legacy flag as Core uses legacy transactions.

  • Test thoroughly with different gas values to ensure transaction success.

  • Note: At the time of the hardfork, no contracts will be configured for this upgrade, so most apps will not be affected immediately.

Testing on Core Testnet2 is encouraged if you're building with custom gas logic. It is recommended to redeploy smart contracts to the Core Mainnet after thorough testing.

For General Users

For general users and wallet holders, no action is required. Transactions may incur slightly higher gas costs if interacting with the contracts configured for compatibility with this upgrade.

Why Upgrade?

Running the latest software ensures uninterrupted operation, access to new features, and alignment with the network’s latest protocols. Failing to upgrade may lead to syncing issues or node disconnection.

Resources

Support & Assistance

The Theseus hardfork is a significant milestone in Core’s roadmap toward a more modular, incentive-aligned blockchain ecosystem. If you have any questions or require further assistance, please reach out to the official Core Dev Forum or Discord for support.