processing

Documentation

Overview

Processing contract is a contract deployed in FrostFS mainchain.

Processing contract pays for all multisignature transaction executions when notary service is enabled in the mainchain. Notary service prepares multisigned transactions, however they should contain sidechain GAS to be executed. It is inconvenient to ask Alphabet nodes to pay for these transactions: nodes can change over time, some nodes will spend sidechain GAS faster. It leads to economic instability.

Processing contract exists to solve this issue. At the Withdraw invocation of FrostFS contract, a user pays fee directly to this contract. This fee is used to pay for Cheque invocation of FrostFS contract that returns mainchain GAS back to the user. The address of the Processing contract is used as the first signer in the multisignature transaction. Therefore, NeoVM executes Verify method of the contract and if invocation is verified, Processing contract pays for the execution.

Contract notifications

Processing contract does not produce notifications to process.

Contract storage scheme

|   Key                       | Value      |           Description            |
|-----------------------------|------------|----------------------------------|
| `frostfsScriptHash`         | Hash160    | frostFS contract hash            |

Index

• func OnNEP17Payment(from interop.Hash160, amount int, data any)
• func Update(script []byte, manifest []byte, data any)
• func Verify() bool
• func Version() int

Functions

func OnNEP17Payment

func OnNEP17Payment(from interop.Hash160, amount int, data any)

OnNEP17Payment is a callback for NEP-17 compatible native GAS contract.

func Update

func Update(script []byte, manifest []byte, data any)

Update method updates contract source code and manifest. It can be invoked only by the sidechain committee.

func Verify

func Verify() bool

Verify method returns true if transaction contains valid multisignature of Alphabet nodes of the Inner Ring.

func Version

func Version() int

Version returns the version of the contract.