Fjord

Overview of the Fjord hardfork, introducing FastLZ-based L1 fee estimation, the RIP-7212 secp256r1 precompile, and brotli channel compression.

Activation Timestamps

Network	Activation timestamp
mainnet	1720627201 (2024-07-10 16:00:01 UTC)
sepolia	1716998400 (2024-05-29 16:00:00 UTC)

Execution Layer

• RIP-7212: Precompile for secp256r1 Curve Support
• FastLZ compression for L1 data fee calculation
• Deprecate the getL1GasUsed method on the GasPriceOracle contract
• Deprecate the L1GasUsed field on the transaction receipt

Consensus Layer

• Constant maximum sequencer drift
• Brotli channel compression
• Increase Max Bytes Per Channel and Max Channel Bank Size