Canyon

Hardfork registry entry for the Canyon network upgrade, which brought L1’s Shapella upgrade to the OP Stack.

Canyon brought Ethereum’s Shapella upgrade to the OP Stack along with minor protocol fixes.

Status	Active
Governing spec	specs.optimism.io
Governance approval	proposal
Mainnet activation (superchain default)	Thu, 11 Jan 2024 17:00:01 UTC (1704992401)
Sepolia activation (superchain default)	Tue, 14 Nov 2023 17:00:00 UTC (1699981200)

What changed

Per the spec overview:

• Shapella EIPs on L2: EIP-3651 (warm COINBASE), EIP-3855 (PUSH0), EIP-3860 (limit and meter initcode), EIP-4895 (withdrawals operations, set to the empty array on L2), and EIP-6049 (deprecate SELFDESTRUCT).
• Modified the EIP-1559 denominator.
• Added the deposit nonce and deposit nonce version to the deposit receipt hash.
• Deployed the create2Deployer predeploy at 0x13b0D85CcB8bf860b6b79AF3029fCA081AE9beF2.
• Consensus layer: channel ordering fix.