/*
NeoFS contract is a contract deployed in NeoFS mainchain.

NeoFS contract is an entry point to NeoFS users. This contract stores all NeoFS
related GAS, registers new Inner Ring candidates and produces notifications
to control the sidechain.

While mainchain committee controls the list of Alphabet nodes in native
RoleManagement contract, NeoFS can't change more than 1\3 keys at a time.
NeoFS contract contains the actual list of Alphabet nodes in the sidechain.

Network configuration is also stored in NeoFS contract. All changes in
configuration are mirrored in the sidechain with notifications.

Contract notifications

Deposit notification. This notification is produced when user transfers native
GAS to the NeoFS contract address. The same amount of NEOFS token will be
minted in Balance contract in the sidechain.

  Deposit:
    - name: from
      type: Hash160
    - name: amount
      type: Integer
    - name: receiver
      type: Hash160
    - name: txHash
      type: Hash256

Withdraw notification. This notification is produced when a user wants to
withdraw GAS from the internal NeoFS balance and has paid fee for that.

  Withdraw:
    - name: user
      type: Hash160
    - name: amount
      type: Integer
    - name: txHash
      type: Hash256


Cheque notification. This notification is produced when NeoFS contract
has successfully transferred assets back to the user after withdraw.

  Cheque:
    - name: id
      type: ByteArray
    - name: user
      type: Hash160
    - name: amount
      type: Integer
    - name: lockAccount
      type: ByteArray

Bind notification. This notification is produced when a user wants to bind
public keys with the user account (OwnerID). Keys argument is an array of ByteArray.

  Bind:
    - name: user
      type: ByteArray
    - name: keys
      type: Array

Unbind notification. This notification is produced when a user wants to unbind
public keys with the user account (OwnerID). Keys argument is an array of ByteArray.

  Unbind:
    - name: user
      type: ByteArray
    - name: keys
      type: Array

AlphabetUpdate notification. This notification is produced when Alphabet nodes
have updated their lists in the contract. Alphabet argument is an array of ByteArray. It
contains public keys of new alphabet nodes.

  AlphabetUpdate:
    - name: id
      type: ByteArray
    - name: alphabet
      type: Array

SetConfig notification. This notification is produced when Alphabet nodes update
NeoFS network configuration value.

  SetConfig
    - name: id
      type: ByteArray
    - name: key
      type: ByteArray
    - name: value
      type: ByteArray
*/
package neofs