Avalanche9000 Reduces L1 Deployment Costs by 99.9%

Avalanche’s largest network upgrade to date, Avalanche9000 (also known as Etna), activated on mainnet in December 2024. The upgrade fundamentally reimagines Subnets as sovereign Layer 1 blockchains with 99.9% lower deployment costs.

Subnets Become L1s

The terminology shift from “Subnets” to “L1s” reflects a substantive architectural change. Previously, Subnet validators had to sync the Primary Network’s X and C-Chains and stake 2,000 AVAX (approximately $40,000 at $20/AVAX). This created significant economic barriers.

Now, L1 validators pay a dynamic monthly fee of approximately 1.33 AVAX and are exempt from Primary Network validation. Validator management moves from the P-Chain to smart contracts deployed by L1 creators.

Key Technical Changes

ACP-77 separates Primary Network validators from L1 validators, enabling customized validation rules per chain. ACP-125 reduces the C-Chain minimum base fee from 25 nAVAX to 1 nAVAX, a 96% reduction that significantly lowers transaction costs during low activity.

ACP-118 introduces a VM-agnostic standard for Avalanche Interchain Messages, enabling cross-chain communication through threshold BLS signatures.

Conversion Process

Existing Subnets can convert to L1s via the ConvertSubnetToL1Tx transaction, providing the validator manager contract address. Legacy Subnets continue operating under the old model until they choose to convert.

Ecosystem Impact

The upgrade removes major barriers to launching application-specific chains. Projects no longer need to recruit validators willing to stake substantial AVAX, democratizing access to Avalanche’s multi-chain architecture.