Architecture Overview

Vauban is a liquid staking platform on Starknet with a transaction preparation pattern where the backend prepares calldata but never executes transactions.

Core Design

Vauban uses a transaction preparation pattern: the backend prepares calldata but never holds private keys. All signing happens client-side in the user's wallet.

Key Design Decisions

• Transaction security: Backend never holds private keys
• Centralized delegation: VaubanManager is the single pool_member, aggregating all users to reduce commission costs
• Dual-pool system: Separate STRK and BTC delegation pools managed by the same contract
• All rewards in STRK: Regardless of staked asset, Starknet pays rewards in STRK
• 7-day unbonding: Protocol-level requirement with epoch-based batching for multiple users