# Compliance & Enforced Rules

### Canonical Accounting Domain

All economic truth is anchored on zkSync.\
The vault enforces rules for:

* **share minting** (only after asset finality)
* **share burning** (only when liquidity is guaranteed)
* **NAV changes** (only after oracle-validated reporting)
* **exposure limits** (per-strategy and per-plane)
* **rounding rules** (ERC-4626 compliant)

Even though strategies run on external execution planes, the zkSync vault acts as the authoritative registry of:

* total supply
* total underlying assets
* pending liabilities
* discounting factors for frozen planes
* pending deposits/withdrawals
* rebalance state

From the user’s perspective, the system behaves exactly like a single-chain ERC-4626 vault; all multi-chain complexity is handled behind the scenes.

### ERC-4626 Compliance

The vault preserves full ERC-4626 semantics:

* **convertToShares()**\
  Uses the current validated totalAssets snapshot.
* **convertToAssets()**\
  Performs proportional conversion with downward rounding.
* **previewDeposit / previewWithdraw / previewMint / previewRedeem**\
  Computed deterministically on zkSync, independent of pending cross-chain operations.
* **deposit / mint**\
  Only mint shares when zkSync receives the underlying assets.
* **withdraw / redeem**\
  Burn shares only when underlying liquidity is secured.

This ensures that multi-chain execution does not alter how ERC-4626 behaves for integrators, auditors, or downstream protocols.


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