Vault: Emergency Shutdown, Governance, and Role Hierarchy

What You Are Building

The deployable Vault contract. This is the final link in the Vault chain (Vault is VaultFees is VaultWithdraw is VaultLockedProfit is VaultReport is VaultCreditDebt is VaultAddStrategy is VaultTotalAssets is VaultDeposit is VaultShareMath is VaultShareToken is VaultStorage). It adds:

1. The actual constructor.
2. The emergency shutdown switch.
3. The 2-step governance transfer.
4. Single-step setters for management, guardian, depositLimit.
5. A sweep function for stuck non-token assets.

After this section, you have a working Yearn V2 vault you could deploy to mainnet (with a concrete strategy from the Strategy chain).