Data size constraint of the container contract

[AnnaShaleva]

The size of Container struct stored in the container contract by https://github.com/nspcc-dev/neofs-contract/blob/dc89137484cd042e79378d4745558cc560b6368a/container/container_contract.go#L731 is restricted by the stackitem.MaxSize constraint (1MB).

The struct in the serialized representation takes has the following fields:

• value (ByteString, 1 byte for stackitem type + len(serialized container bytes))
• sig (ByteString, 1 byte for stackitem type + 64 bytes of the signature)
• pub (ByteString, 1 byte for the stackitem type + 33 bytes of the compressed key)
• token (ByteString, 1 byte for the stackitem type + [0 or len(SessionToken bytes)])

We need to estimate the maximum size of the serialized container representation to ensure it fits the limits.

The same thing should be done for eACL (estimate the maximum size of serialized eACL representation).

Ref. #304.

[roman-khimov]

I think it's more limited by limits.MaxStorageValueLen. Probably this is not a big problem (maybe more relevant for EACLs).

[AnnaShaleva]

I think it's more limited by limits.MaxStorageValueLen

Oh, that's definitely the case, I probably forgot to update my notes before the publishing, because I've also considered this case.