Ethereum Classic

Core Developer Calls

Where Ethereum Classic protocol decisions are made. Client teams meet publicly to reach consensus on network upgrades, review ECIP proposals, and coordinate hard fork activations.

19 CALLS·0 RECORDINGS

ECIP Registry →GitHub →

UPCOMING

Olympia

The agenda for the call that would set Olympia's activation blocks: the draft ECIPs, client readiness, and the order the ECIPs set before a block is scheduled.

View Agenda →

// What are Core Developer Calls?

CDCs are public meetings where ETC client developers coordinate protocol changes. Every network fork, from Frontier (2015) through Spiral, was discussed, debated and settled through this process, and the proposed Olympia upgrade is next. Proposals that were rejected or withdrawn (ECIP-1049, 1051 and 1098) are also documented here.

// How to Participate

Join the community Discord or follow @ETC_Network on X for call announcements. Review active ECIPs at ecips.ethereumclassic.org.

/ Archive

All 19 protocol decisions since genesis, in reverse chronological order.

Upcoming

Olympia

The agenda for the call that would set Olympia's activation blocks: the draft ECIPs, client readiness, and the order the ECIPs set before a block is scheduled.

ECIP-1111ECIP-1112ECIP-1113+1

Feb 5, 2024#19,250,000

Spiral

ECIP-1109: Aligned ETC with Ethereum's Shanghai upgrade (execution layer changes only). PUSH0 instruction, warm COINBASE, and initcode limits.

ECIP-1109

Feb 12, 2022#14,525,000

Mystique

ECIP-1104: Aligned ETC with a subset of Ethereum's London upgrade, excluding EIP-1559. Fee market change deferred to the Olympia proposal, which would redirect the basefee to the Sovereignty Vault.

ECIP-1104

Jul 24, 2021#13,189,133

Magneto

ECIP-1103: Aligned ETC with Ethereum's Berlin upgrade. Typed transactions, access lists, and gas cost adjustments.

ECIP-1103

Sep 20, 2021WITHDRAWN

ECIP-1098 Proto Treasury

ECIP-1098 was IOHK's formal Proto Treasury System proposal. After a year of community debate, both ETC Coop and IOHK withdrew support. The IOHK Grothendieck team wound down following the withdrawal.

ECIP-1098

Nov 28, 2020#11,700,000

Thanos

ECIP-1099: Doubled the DAG epoch length, halving how fast the DAG grows, so consumer GPUs could keep mining ETC. Introduced the Etchash algorithm.

ECIP-1099

Sep 11, 2020WITHDRAWN

ECIP-1049 Keccak256

ECIP-1049 proposed changing ETC's mining algorithm from Ethash/Etchash to Keccak256 (SHA-3). After three years of discussion and four Core Devs Calls, the proposal was withdrawn due to lack of consensus and risk of a contentious chain split.

ECIP-1049

Aug 13, 2020WITHDRAWN

ECIP-1051 Treasury Proposal

ECIP-1051 proposed an Ethereum Classic treasury funded by diverting part of the block reward, and was rejected in February 2020. Treasury funding returned to two Core Devs Calls in August 2020, after the 51% attacks, and IOHK then proposed ECIP-1098.

May 31, 2020#10,500,839

Phoenix

ECIP-1088: Aligned ETC with Ethereum's Istanbul upgrade. Blake2, alt_bn128 repricing, ChainID opcode, trie-dependent opcode repricing, calldata reduction, and SSTORE rebalancing.

ECIP-1088

Jan 12, 2020#9,573,000

Agharta

ECIP-1056: Aligned ETC with Ethereum's Constantinople and Petersburg upgrades. Bitwise shifting, CREATE2, and EXTCODEHASH opcodes.

ECIP-1056

Sep 12, 2019#8,772,000

Atlantis

ECIP-1054: Aligned ETC with Ethereum's Spurious Dragon and Byzantium upgrades. REVERT, STATICCALL, alt_bn128 precompiles, receipt status codes, and state trie clearing.

ECIP-1054

May 29, 2018#5,900,000