/*
Container contract is a contract deployed in FrostFS sidechain.

Container contract stores and manages containers, extended ACLs and container
size estimations. Contract does not perform sanity or signature checks of
containers or extended ACLs, it is done by Alphabet nodes of the Inner Ring.
Alphabet nodes approve it by invoking the same Put or SetEACL methods with
the same arguments.

# Contract notifications

StartEstimation notification. This notification is produced when Storage nodes
should exchange estimation values of container sizes among other Storage nodes.

	StartEstimation:
	  - name: epoch
	    type: Integer

StopEstimation notification. This notification is produced when Storage nodes
should calculate average container size based on received estimations and store
it in Container contract.

	StopEstimation:
	  - name: epoch
	    type: Integer

# Contract storage scheme

	|   Key                                               | Value      |           Description            |
	|-----------------------------------------------------------------------------------------------------|
	| `netmapScriptHash`                                  | Hash160    | netmap contract hash             |
	| `balanceScriptHash`                                 | Hash160    | balance contract hash            |
	| `identityScriptHash`                                | Hash160    | frostfsID contract hash          |
	| `nnsContractKey`                                    | Hash160    | nns contract hash                |
	| `nnsRoot`                                           | string     | default value for domain zone    |
	| `cnr` + epoch + containerID + publicKeyHash[:10]    | ByteArray  | estimated container size         |
	| `est` + containerID + publicKeyHash                 | ByteArray  | serialized epochs array          |
	| `o` + ownerID + containerID                         | ByteArray  | container ID                     |
	| `x` + containerID                                   | ByteArray  | serialized container struct      |
	| `nnsHasAlias` + containerID                         | string     | domain name                      |
*/
package container