client

package
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 Go to latest Published: Mar 1, 2023 License: GPL-3.0 Imports: 39 Imported by: 0

Documentation

Index

Constants

View Source 
const (

	// NNSAuditContractName is a name of the audit contract in NNS.
	NNSAuditContractName = "audit.frostfs"
	// NNSBalanceContractName is a name of the balance contract in NNS.
	NNSBalanceContractName = "balance.frostfs"
	// NNSContainerContractName is a name of the container contract in NNS.
	NNSContainerContractName = "container.frostfs"
	// NNSFrostFSIDContractName is a name of the frostfsid contract in NNS.
	NNSFrostFSIDContractName = "frostfsid.frostfs"
	// NNSNetmapContractName is a name of the netmap contract in NNS.
	NNSNetmapContractName = "netmap.frostfs"
	// NNSProxyContractName is a name of the proxy contract in NNS.
	NNSProxyContractName = "proxy.frostfs"
	// NNSReputationContractName is a name of the reputation contract in NNS.
	NNSReputationContractName = "reputation.frostfs"
	// NNSSubnetworkContractName is a name of the subnet contract in NNS.
	NNSSubnetworkContractName = "subnet.frostfs"
	// NNSGroupKeyName is a name for the FrostFS group key record in NNS.
	NNSGroupKeyName = "group.frostfs"
)
View Source 
const HaltState = "HALT"

HaltState returned if TestInvoke function processed without panic.

Variables

View Source 
var (
	// ErrNilClient is returned by functions that expect
	// a non-nil Client pointer, but received nil.
	ErrNilClient = errors.New("client is nil")

	// ErrConnectionLost is returned when client lost web socket connection
	// to the RPC node and has not been able to establish a new one since.
	ErrConnectionLost = errors.New("connection to the RPC node has been lost")
)
View Source 
var (
	// ErrNNSRecordNotFound means that there is no such record in NNS contract.
	ErrNNSRecordNotFound = errors.New("record has not been found in NNS contract")
)

Functions

func ArrayFromStackItem 

func ArrayFromStackItem(param stackitem.Item) ([]stackitem.Item, error)

ArrayFromStackItem returns the slice contract parameters from passed parameter.

If passed parameter carries boolean false value, (nil, nil) returns.

func BigIntFromStackItem 

func BigIntFromStackItem(param stackitem.Item) (*big.Int, error)

BigIntFromStackItem receives numerical value from the value of a smart contract parameter.

func BoolFromStackItem 

func BoolFromStackItem(param stackitem.Item) (bool, error)

BoolFromStackItem receives boolean value from the value of a smart contract parameter.

func BytesFromStackItem 

func BytesFromStackItem(param stackitem.Item) ([]byte, error)

BytesFromStackItem receives binary value from the value of a smart contract parameter.

func CalculateNotaryDepositAmount 

func CalculateNotaryDepositAmount(c *Client, gasMul, gasDiv int64) (fixedn.Fixed8, error)

CalculateNotaryDepositAmount calculates notary deposit amount using the rule: 

IF notaryBalance < gasBalance * gasMul {
    DEPOSIT gasBalance / gasDiv
} ELSE {
    DEPOSIT 1
}

gasMul and gasDiv must be positive.

func IntFromStackItem 

func IntFromStackItem(param stackitem.Item) (int64, error)

IntFromStackItem receives numerical value from the value of a smart contract parameter.

func NNSAlphabetContractName 

func NNSAlphabetContractName(index int) string

NNSAlphabetContractName returns contract name of the alphabet contract in NNS based on alphabet index.

func StringFromStackItem 

func StringFromStackItem(param stackitem.Item) (string, error)

StringFromStackItem receives string value from the value of a smart contract parameter.

Types

type AlphabetKeys 

type AlphabetKeys func() (keys.PublicKeys, error)

type Callback 

type Callback func()

Callback is a function that is going to be called on certain Client's state.

type Client 

type Client struct {
	// contains filtered or unexported fields
}

Client is a wrapper over web socket neo-go client that provides smart-contract invocation interface and notification subscription functionality.

On connection lost tries establishing new connection to the next RPC (if any). If no RPC node available, switches to inactive mode: any RPC call leads to immediate return with ErrConnectionLost error, notification channel returned from Client.NotificationChannel is closed.

Working client must be created via constructor New. Using the Client that has been created with new(Client) expression (or just declaring a Client variable) is unsafe and can lead to panic.

func New 

func New(key *keys.PrivateKey, opts ...Option) (*Client, error)

New creates, initializes and returns the Client instance. Notary support should be enabled with EnableNotarySupport client method separately.

If private key is nil, it panics.

Other values are set according to provided options, or by default:

  • client context: Background;
  • dial timeout: 5s;
  • blockchain network type: netmode.PrivNet;
  • signer with the global scope;
  • wait interval: 500ms;
  • logger: &logger.Logger{Logger: zap.L()}.

If desired option satisfies the default value, it can be omitted. If multiple options of the same config value are supplied, the option with the highest index in the arguments will be used.

func (*Client) BlockCount 

func (c *Client) BlockCount() (res uint32, err error)

BlockCount returns block count of the network to which the underlying RPC node client is connected.

func (*Client) CalculateNonceAndVUB 

func (c *Client) CalculateNonceAndVUB(hash util.Uint256) (nonce uint32, vub uint32, err error)

CalculateNonceAndVUB calculates nonce and ValidUntilBlock values based on transaction hash.

func (*Client) Close 

func (c *Client) Close()

Close closes connection to the remote side making this client instance unusable. Closes notification channel returned from Client.NotificationChannel(), Removes all subscription.

func (*Client) Committee 

func (c *Client) Committee() (res keys.PublicKeys, err error)

Committee returns keys of chain committee from neo native contract.

func (*Client) DepositEndlessNotary 

func (c *Client) DepositEndlessNotary(amount fixedn.Fixed8) (res util.Uint256, err error)

DepositEndlessNotary calls notary deposit method. Unlike `DepositNotary`, this method sets notary deposit till parameter to a maximum possible value. This allows to avoid ValidAfterDeposit failures.

This function must be invoked with notary enabled otherwise it throws panic.

func (*Client) DepositNotary 

func (c *Client) DepositNotary(amount fixedn.Fixed8, delta uint32) (res util.Uint256, err error)

DepositNotary calls notary deposit method. Deposit is required to operate with notary contract. It used by notary contract in to produce fallback tx if main tx failed to create. Deposit isn't last forever, so it should be called periodically. Notary support should be enabled in client to use this function.

This function must be invoked with notary enabled otherwise it throws panic.

func (*Client) EnableNotarySupport 

func (c *Client) EnableNotarySupport(opts ...NotaryOption) error

EnableNotarySupport creates notary structure in client that provides ability for client to get alphabet keys from committee or provided source and use proxy contract script hash to create tx for notary contract.

func (*Client) GasBalance 

func (c *Client) GasBalance() (res int64, err error)

GasBalance returns GAS amount in the client's wallet.

func (*Client) GetDesignateHash 

func (c *Client) GetDesignateHash() util.Uint160

GetDesignateHash returns hash of the native `RoleManagement` contract.

func (*Client) GetNotaryDeposit 

func (c *Client) GetNotaryDeposit() (res int64, err error)

GetNotaryDeposit returns deposit of client's account in notary contract. Notary support should be enabled in client to use this function.

This function must be invoked with notary enabled otherwise it throws panic.

func (*Client) Invoke 

func (c *Client) Invoke(contract util.Uint160, fee fixedn.Fixed8, method string, args ...any) error

Invoke invokes contract method by sending transaction into blockchain. Supported args types: int64, string, util.Uint160, []byte and bool.

func (*Client) IsNotaryEnabled 

func (c *Client) IsNotaryEnabled() bool

IsNotaryEnabled returns true if EnableNotarySupport has been successfully called before.

func (*Client) IsValidScript 

func (c *Client) IsValidScript(script []byte, signers []transaction.Signer) (res bool, err error)

IsValidScript returns true if invocation script executes with HALT state.

func (*Client) MagicNumber 

func (c *Client) MagicNumber() (uint64, error)

MagicNumber returns the magic number of the network to which the underlying RPC node client is connected.

func (*Client) MsPerBlock 

func (c *Client) MsPerBlock() (res int64, err error)

MsPerBlock returns MillisecondsPerBlock network parameter.

func (*Client) NNSContractAddress 

func (c *Client) NNSContractAddress(name string) (sh util.Uint160, err error)

NNSContractAddress returns contract address script hash based on its name in NNS contract. If script hash has not been found, returns ErrNNSRecordNotFound.

func (*Client) NNSHash 

func (c *Client) NNSHash() (util.Uint160, error)

NNSHash returns NNS contract hash.

func (*Client) NeoFSAlphabetList 

func (c *Client) NeoFSAlphabetList() (res keys.PublicKeys, err error)

NeoFSAlphabetList returns keys that stored in NeoFS Alphabet role. Main chain stores alphabet node keys of inner ring there, however the sidechain stores both alphabet and non alphabet node keys of inner ring.

func (*Client) NotaryInvoke 

func (c *Client) NotaryInvoke(contract util.Uint160, fee fixedn.Fixed8, nonce uint32, vub *uint32, method string, args ...any) error

NotaryInvoke invokes contract method by sending tx to notary contract in blockchain. Fallback tx is a `RET`. If Notary support is not enabled it fallbacks to a simple `Invoke()`.

`nonce` and `vub` are used only if notary is enabled.

func (*Client) NotaryInvokeNotAlpha 

func (c *Client) NotaryInvokeNotAlpha(contract util.Uint160, fee fixedn.Fixed8, method string, args ...any) error

NotaryInvokeNotAlpha does the same as NotaryInvoke but does not use client's private key in Invocation script. It means that main TX of notary request is not expected to be signed by the current node.

Considered to be used by non-IR nodes.

func (*Client) NotarySignAndInvokeTX 

func (c *Client) NotarySignAndInvokeTX(mainTx *transaction.Transaction) error

NotarySignAndInvokeTX signs and sends notary request that was received from Notary service. NOTE: does not fallback to simple `Invoke()`. Expected to be used only for TXs retrieved from the received notary requests.

func (*Client) NotificationChannel 

func (c *Client) NotificationChannel() <-chan rpcclient.Notification

NotificationChannel returns channel than receives subscribed notification from the connected RPC node. Channel is closed when connection to the RPC node has been lost without the possibility of recovery.

func (*Client) ProbeNotary 

func (c *Client) ProbeNotary() (res bool)

ProbeNotary checks if native `Notary` contract is presented on chain.

func (*Client) SetGroupSignerScope 

func (c *Client) SetGroupSignerScope() error

SetGroupSignerScope makes the default signer scope include all FrostFS contracts. Should be called for side-chain client only.

func (*Client) SubscribeForExecutionNotifications 

func (c *Client) SubscribeForExecutionNotifications(contract util.Uint160) error

SubscribeForExecutionNotifications adds subscription for notifications generated during contract transaction execution to this instance of client.

Returns ErrConnectionLost if client has not been able to establish connection to any of passed RPC endpoints.

func (*Client) SubscribeForNewBlocks 

func (c *Client) SubscribeForNewBlocks() error

SubscribeForNewBlocks adds subscription for new block events to this instance of client.

Returns ErrConnectionLost if client has not been able to establish connection to any of passed RPC endpoints.

func (*Client) SubscribeForNotaryRequests 

func (c *Client) SubscribeForNotaryRequests(txSigner util.Uint160) error

SubscribeForNotaryRequests adds subscription for notary request payloads addition or removal events to this instance of client. Passed txSigner is used as filter: subscription is only for the notary requests that must be signed by txSigner.

Returns ErrConnectionLost if client has not been able to establish connection to any of passed RPC endpoints.

func (*Client) TestInvoke 

func (c *Client) TestInvoke(contract util.Uint160, method string, args ...any) (res []stackitem.Item, err error)

TestInvoke invokes contract method locally in neo-go node. This method should be used to read data from smart-contract.

func (*Client) TransferGas 

func (c *Client) TransferGas(receiver util.Uint160, amount fixedn.Fixed8) error

TransferGas to the receiver from local wallet.

func (*Client) TxHalt 

func (c *Client) TxHalt(h util.Uint256) (res bool, err error)

TxHalt returns true if transaction has been successfully executed and persisted.

func (*Client) TxHeight 

func (c *Client) TxHeight(h util.Uint256) (res uint32, err error)

TxHeight returns true if transaction has been successfully executed and persisted.

func (*Client) UnsubscribeAll 

func (c *Client) UnsubscribeAll() error

UnsubscribeAll removes all active subscriptions of current client.

Returns ErrConnectionLost if client has not been able to establish connection to any of passed RPC endpoints.

func (*Client) UnsubscribeContract 

func (c *Client) UnsubscribeContract(contract util.Uint160) error

UnsubscribeContract removes subscription for given contract event stream.

Returns ErrConnectionLost if client has not been able to establish connection to any of passed RPC endpoints.

func (*Client) UnsubscribeNotaryRequest 

func (c *Client) UnsubscribeNotaryRequest(signer util.Uint160) error

UnsubscribeNotaryRequest removes subscription for given notary requests signer.

Returns ErrConnectionLost if client has not been able to establish connection to any of passed RPC endpoints.

func (*Client) UpdateNeoFSAlphabetList 

func (c *Client) UpdateNeoFSAlphabetList(prm UpdateAlphabetListPrm) error

UpdateNeoFSAlphabetList updates list of alphabet nodes in designate contract. As for sidechain list should contain all inner ring nodes. Requires committee multi signature.

This function must be invoked with notary enabled otherwise it throws panic.

func (*Client) UpdateNotaryList 

func (c *Client) UpdateNotaryList(prm UpdateNotaryListPrm) error

UpdateNotaryList updates list of notary nodes in designate contract. Requires committee multi signature.

This function must be invoked with notary enabled otherwise it throws panic.

func (*Client) Wait 

func (c *Client) Wait(ctx context.Context, n uint32) error

Wait function blocks routing execution until there are `n` new blocks in the chain.

Returns only connection errors.

type Endpoint 

type Endpoint struct {
	Address  string
	Priority int
}

Endpoint represents morph endpoint together with its priority.

type InvokePrm 

type InvokePrm struct {
	TestInvokePrm

	// optional parameters
	InvokePrmOptional
}

InvokePrm groups parameters of the Invoke operation.

type InvokePrmOptional 

type InvokePrmOptional struct {
	// contains filtered or unexported fields
}

InvokePrmOptional groups optional parameters of the Invoke operation.

func (*InvokePrmOptional) SetHash 

func (i *InvokePrmOptional) SetHash(hash util.Uint256)

SetHash sets optional hash of the transaction. If hash is set and notary is enabled, StaticClient uses it for notary nonce and `validUntilBlock` calculation.

type NotaryOption 

type NotaryOption func(*notaryCfg)

func WithAlphabetSource 

func WithAlphabetSource(t AlphabetKeys) NotaryOption

WithAlphabetSource returns a notary support option for client that specifies function to return list of alphabet node keys. By default notary subsystem uses committee as a source. This is valid for side chain but notary in main chain should override it.

func WithFallbackTime 

func WithFallbackTime(t uint32) NotaryOption

WithFallbackTime returns a notary support option for client that specifies amount of blocks before fallbackTx will be sent. Should be less than TxValidTime.

func WithProxyContract 

func WithProxyContract(h util.Uint160) NotaryOption

WithProxyContract sets proxy contract hash.

func WithRoundTime 

func WithRoundTime(t uint32) NotaryOption

WithRoundTime returns a notary support option for client that specifies extra blocks to synchronize side chain height diff of inner ring nodes.

func WithTxValidTime 

func WithTxValidTime(t uint32) NotaryOption

WithTxValidTime returns a notary support option for client that specifies minimum amount of blocks when mainTx will be valid.

type Option 

type Option func(*cfg)

Option is a client configuration change function.

func WithConnLostCallback 

func WithConnLostCallback(cb Callback) Option

WithConnLostCallback return a client constructor option that specifies a callback that is called when Client unsuccessfully tried to connect to all the specified endpoints.

func WithContext 

func WithContext(ctx context.Context) Option

WithContext returns a client constructor option that specifies the neo-go client context.

Ignores nil value. Has no effect if WithSingleClient is provided.

If option not provided, context.Background() is used.

func WithDialTimeout 

func WithDialTimeout(dur time.Duration) Option

WithDialTimeout returns a client constructor option that specifies neo-go client dial timeout duration.

Ignores non-positive value. Has no effect if WithSingleClient is provided.

If option not provided, 5s timeout is used.

func WithEndpoints 

func WithEndpoints(endpoints ...Endpoint) Option

WithEndpoints returns a client constructor option that specifies additional Neo rpc endpoints.

func WithLogger 

func WithLogger(logger *logger.Logger) Option

WithLogger returns a client constructor option that specifies the component for writing log messages.

Ignores nil value.

If option not provided, &logger.Logger{Logger: zap.L()} is used.

func WithSigner 

func WithSigner(signer *transaction.Signer) Option

WithSigner returns a client constructor option that specifies the signer and the scope of the transaction.

Ignores nil value.

If option not provided, signer with global scope is used.

func WithSingleClient 

func WithSingleClient(cli *rpcclient.WSClient) Option

WithSingleClient returns a client constructor option that specifies single neo-go client and forces Client to use it for requests.

Passed client must already be initialized.

func WithSwitchInterval 

func WithSwitchInterval(i time.Duration) Option

WithSwitchInterval returns a client constructor option that specifies a wait interval b/w attempts to reconnect to an RPC node with the highest priority.

type StaticClient 

type StaticClient struct {
	// contains filtered or unexported fields
}

StaticClient is a wrapper over Neo:Morph client that invokes single smart contract methods with fixed fee.

Working static client must be created via constructor NewStatic. Using the StaticClient that has been created with new(StaticClient) expression (or just declaring a StaticClient variable) is unsafe and can lead to panic.

func NewStatic 

func NewStatic(client *Client, scriptHash util.Uint160, fee fixedn.Fixed8, opts ...StaticClientOption) (*StaticClient, error)

NewStatic creates, initializes and returns the StaticClient instance.

If provided Client instance is nil, ErrNilClient is returned.

Specified fee is used by default. Per-operation fees can be customized via WithCustomFee option.

func (StaticClient) ContractAddress 

func (s StaticClient) ContractAddress() util.Uint160

ContractAddress returns the address of the associated contract.

func (StaticClient) Invoke 

func (s StaticClient) Invoke(prm InvokePrm) error

Invoke calls Invoke method of Client with static internal script hash and fee. Supported args types are the same as in Client.

If TryNotary is provided:

  • if AsAlphabet is provided, calls NotaryInvoke;
  • otherwise, calls NotaryInvokeNotAlpha.

If fee for the operation executed using specified method is customized, then StaticClient uses it. Otherwise, default fee is used.

func (*StaticClient) IsAlpha 

func (s *StaticClient) IsAlpha() bool

IsAlpha returns Alphabet status of the client.

See also AsAlphabet.

func (StaticClient) Morph 

func (s StaticClient) Morph() *Client

Morph return wrapped raw morph client.

func (StaticClient) TestInvoke 

func (s StaticClient) TestInvoke(prm TestInvokePrm) ([]stackitem.Item, error)

TestInvoke calls TestInvoke method of Client with static internal script hash.

func (*StaticClient) WithNotary 

func (s *StaticClient) WithNotary() bool

WithNotary returns notary status of the client.

See also TryNotary.

type StaticClientOption 

type StaticClientOption func(*staticOpts)

StaticClientOption allows to set an optional parameter of StaticClient.

func AsAlphabet 

func AsAlphabet() StaticClientOption

AsAlphabet returns option to sign main TX of notary requests with client's private key.

Considered to be used by IR nodes only.

func TryNotary 

func TryNotary() StaticClientOption

TryNotary returns option to enable notary invocation tries.

func WithCustomFee 

func WithCustomFee(method string, fee fixedn.Fixed8) StaticClientOption

WithCustomFee returns option to specify custom fee for the operation executed using specified contract method.

type TestInvokePrm 

type TestInvokePrm struct {
	// contains filtered or unexported fields
}

TestInvokePrm groups parameters of the TestInvoke operation.

func (*TestInvokePrm) SetArgs 

func (ti *TestInvokePrm) SetArgs(args ...any)

SetArgs sets arguments of the contact call.

func (*TestInvokePrm) SetMethod 

func (ti *TestInvokePrm) SetMethod(method string)

SetMethod sets method of the contract to call.

type UpdateAlphabetListPrm 

type UpdateAlphabetListPrm struct {
	// contains filtered or unexported fields
}

UpdateAlphabetListPrm groups parameters of UpdateNeoFSAlphabetList operation.

func (*UpdateAlphabetListPrm) SetHash 

func (u *UpdateAlphabetListPrm) SetHash(hash util.Uint256)

SetHash sets hash of the transaction that led to the update of the alphabet role in the designate contract.

func (*UpdateAlphabetListPrm) SetList 

func (u *UpdateAlphabetListPrm) SetList(list keys.PublicKeys)

SetList sets a list of the new alphabet role keys.

type UpdateNotaryListPrm 

type UpdateNotaryListPrm struct {
	// contains filtered or unexported fields
}

UpdateNotaryListPrm groups parameters of UpdateNotaryList operation.

func (*UpdateNotaryListPrm) SetHash 

func (u *UpdateNotaryListPrm) SetHash(hash util.Uint256)

SetHash sets hash of the transaction that led to the update of the notary role in the designate contract.

func (*UpdateNotaryListPrm) SetList 

func (u *UpdateNotaryListPrm) SetList(list keys.PublicKeys)

SetList sets a list of the new notary role keys.

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