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Introduce procedure for the NeoFS Sidechain deployment
There is a need to initialize running Neo network intended to be NeoFS Sidechain in automatic mode. To do this, a group of committee nodes working in the NeoFS Inner Ring should conduct a set of operations on the blockchain. This commit introduces partially implemented deployment procedure incl. NNS deployment, Notary service and committee group initialization. Deployment of NeoFS-system and custom smart contracts will be implemented in the future. Since procedure is incomplete, it's not yet used in the Inner Ring application. Refs #2195. Signed-off-by: Leonard Lyubich <[email protected]>
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| // Package deploy provides NeoFS Sidechain deployment functionality. | ||
| package deploy | ||
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| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "sort" | ||
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| "github.com/nspcc-dev/neo-go/pkg/core/block" | ||
| "github.com/nspcc-dev/neo-go/pkg/core/state" | ||
| "github.com/nspcc-dev/neo-go/pkg/crypto/keys" | ||
| "github.com/nspcc-dev/neo-go/pkg/neorpc" | ||
| "github.com/nspcc-dev/neo-go/pkg/rpcclient/actor" | ||
| "github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest" | ||
| "github.com/nspcc-dev/neo-go/pkg/smartcontract/nef" | ||
| "github.com/nspcc-dev/neo-go/pkg/wallet" | ||
| "go.uber.org/zap" | ||
| ) | ||
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| // Blockchain groups services provided by particular Neo blockchain network | ||
| // representing NeoFS Sidechain that are required for its deployment. | ||
| type Blockchain interface { | ||
| // RPCActor groups functions needed to compose and send transactions to the | ||
| // blockchain. | ||
| actor.RPCActor | ||
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| // GetCommittee returns list of public keys owned by Neo blockchain committee | ||
| // members. Resulting list is non-empty, unique and unsorted. | ||
| GetCommittee() (keys.PublicKeys, error) | ||
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| // GetContractStateByID returns network state of the smart contract by its ID. | ||
| // GetContractStateByID returns error with 'Unknown contract' substring if | ||
| // requested contract is missing. | ||
| GetContractStateByID(id int32) (*state.Contract, error) | ||
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| // ReceiveBlocks starts background process that forwards new blocks of the | ||
| // blockchain to the provided channel. The process handles all new blocks when | ||
| // ReceiveBlocks is called with nil filter. Returns unique identifier to be used | ||
| // to stop the process via Unsubscribe. | ||
| ReceiveBlocks(*neorpc.BlockFilter, chan<- *block.Block) (id string, err error) | ||
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| // Unsubscribe stops background process started by ReceiveBlocks by ID. | ||
| Unsubscribe(id string) error | ||
| } | ||
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| // KeyStorage represents storage of the private keys. | ||
| type KeyStorage interface { | ||
| // GetPersistedPrivateKey returns singleton private key persisted in the | ||
| // storage. GetPersistedPrivateKey randomizes the key initially. All subsequent | ||
| // successful calls return the same key. | ||
| GetPersistedPrivateKey() (*keys.PrivateKey, error) | ||
| } | ||
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| // CommonDeployPrm groups common deployment parameters of the smart contract. | ||
| type CommonDeployPrm struct { | ||
| NEF nef.File | ||
| Manifest manifest.Manifest | ||
| } | ||
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| // NNSPrm groups deployment parameters of the NeoFS NNS contract. | ||
| type NNSPrm struct { | ||
| Common CommonDeployPrm | ||
| SystemEmail string | ||
| } | ||
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| // Prm groups all parameters of the NeoFS Sidechain deployment procedure. | ||
| type Prm struct { | ||
| // Writes progress into the log. | ||
| Logger *zap.Logger | ||
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| // Particular Neo blockchain instance to be used as NeoFS Sidechain. | ||
| Blockchain Blockchain | ||
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| // Local process account used for transaction signing (must be unlocked). | ||
| LocalAccount *wallet.Account | ||
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| // Storage for single committee group key. | ||
| KeyStorage KeyStorage | ||
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| NNS NNSPrm | ||
| } | ||
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| // Deploy initializes Neo network represented by given Prm.Blockchain as NeoFS | ||
| // Sidechain and makes it full-featured for NeoFS storage system operation. | ||
| // | ||
| // Deploy aborts only by context or when a fatal error occurs. Deployment | ||
| // progress is logged in detail. It is expected that some situations can be | ||
| // changed/fixed on the chain from the outside, so Deploy adapts flexibly and | ||
| // does not stop at the moment. | ||
| // | ||
| // Deployment process is detailed in NeoFS docs. Summary of stages: | ||
| // 1. NNS contract deployment | ||
| // 2. launch of a notary service for the committee | ||
| // 3. committee group initialization | ||
| // 4. deployment of the NeoFS system contracts (currently not done) | ||
| // 5. deployment of custom contracts | ||
| // | ||
| // See project documentation for details. | ||
| func Deploy(ctx context.Context, prm Prm) error { | ||
| committee, err := prm.Blockchain.GetCommittee() | ||
| if err != nil { | ||
| return fmt.Errorf("get Neo committee of the network: %w", err) | ||
| } | ||
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| sort.Sort(committee) | ||
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| // determine a leader | ||
| localPrivateKey := prm.LocalAccount.PrivateKey() | ||
| localPublicKey := localPrivateKey.PublicKey() | ||
| localAccCommitteeIndex := -1 | ||
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| for i := range committee { | ||
| if committee[i].Equal(localPublicKey) { | ||
| localAccCommitteeIndex = i | ||
| break | ||
| } | ||
| } | ||
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| if localAccCommitteeIndex < 0 { | ||
| return errors.New("local account does not belong to any Neo committee member") | ||
| } | ||
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| deployNNSPrm := deployNNSContractPrm{ | ||
| logger: prm.Logger, | ||
| blockchain: prm.Blockchain, | ||
| localAcc: prm.LocalAccount, | ||
| localNEF: prm.NNS.Common.NEF, | ||
| localManifest: prm.NNS.Common.Manifest, | ||
| systemEmail: prm.NNS.SystemEmail, | ||
| initCommitteeGroupKey: nil, // set below | ||
| } | ||
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| // if local node is the first committee member (Az) => deploy NNS contract, | ||
| // otherwise just wait | ||
| if localAccCommitteeIndex == 0 { | ||
| // Why such a centralized approach? There is a need to initialize committee | ||
| // contract group and share its private key between all committee members (the | ||
| // latter is done in the current procedure next). Currently, there is no | ||
| // convenient Neo service for this, and we don't want to use anything but | ||
| // blockchain, so the key is distributed through domain NNS records. However, | ||
| // then the chicken-and-egg problem pops up: committee group must be also set | ||
| // for the NNS contract. To set the group, you need to know the contract hash in | ||
| // advance, and it is a function from the sender of the deployment transaction. | ||
| // Summing up all these statements, we come to the conclusion that the one who | ||
| // deploys the contract creates the group key, and he shares it among the other | ||
| // members. Technically any committee member could deploy NNS contract, but for | ||
| // the sake of simplicity, this is a fixed node. This makes the procedure even | ||
| // more centralized, however, in practice, at the start of the network, all | ||
| // members are expected to be healthy and active. | ||
| // | ||
| // Note that manifest can't be changed w/o NEF change, so it's impossible to set | ||
| // committee group dynamically right after deployment. See | ||
| // https://github.com/nspcc-dev/neofs-contract/issues/340 | ||
| deployNNSPrm.initCommitteeGroupKey = prm.KeyStorage.GetPersistedPrivateKey | ||
| } | ||
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| prm.Logger.Info("initializing NNS contract on the chain...") | ||
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| nnsOnChainAddress, err := initNNSContract(ctx, deployNNSPrm) | ||
| if err != nil { | ||
| return fmt.Errorf("init NNS contract on the chain: %w", err) | ||
| } | ||
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| prm.Logger.Info("NNS contract successfully initialized on the chain", zap.Stringer("address", nnsOnChainAddress)) | ||
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| prm.Logger.Info("enable Notary service for the committee...") | ||
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| err = enableNotary(ctx, enableNotaryPrm{ | ||
| logger: prm.Logger, | ||
| blockchain: prm.Blockchain, | ||
| nnsOnChainAddress: nnsOnChainAddress, | ||
| systemEmail: prm.NNS.SystemEmail, | ||
| committee: committee, | ||
| localAcc: prm.LocalAccount, | ||
| localAccCommitteeIndex: localAccCommitteeIndex, | ||
| }) | ||
| if err != nil { | ||
| return fmt.Errorf("enable Notary service for the committee: %w", err) | ||
| } | ||
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| prm.Logger.Info("Notary service successfully enabled for the committee") | ||
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| prm.Logger.Info("initializing committee group for contract management...") | ||
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| committeeGroupKey, err := initCommitteeGroup(ctx, initCommitteeGroupPrm{ | ||
| logger: prm.Logger, | ||
| blockchain: prm.Blockchain, | ||
| nnsOnChainAddress: nnsOnChainAddress, | ||
| systemEmail: prm.NNS.SystemEmail, | ||
| committee: committee, | ||
| localAcc: prm.LocalAccount, | ||
| localAccCommitteeIndex: localAccCommitteeIndex, | ||
| keyStorage: prm.KeyStorage, | ||
| }) | ||
| if err != nil { | ||
| return fmt.Errorf("init committee group: %w", err) | ||
| } | ||
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| prm.Logger.Info("committee group successfully initialized", zap.Stringer("public key", committeeGroupKey.PublicKey())) | ||
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| // TODO: deploy contracts | ||
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| return nil | ||
| } |
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