This permission allows wallets to do normal transfers from one sapling account to another.
viewing_key
viewing_key:"viewing_key"
The "viewing_key" permission is used to signal to the wallet that a dApp requests access to the viewing key. Sharing the viewing key will give up ALL privacy advantages of sapling, so this permission should only be granted in very specific cases.
This permission allows wallets to do normal transfers from one sapling account to another.