package netmap import ( "fmt" "github.com/nspcc-dev/neo-go/pkg/vm/stackitem" "github.com/nspcc-dev/neofs-node/pkg/morph/client" ) // GetNetMapValues groups the stack parameters // returned by get network map test invoke. type GetNetMapValues struct { peers [][]byte } // State is an enumeration of various states of the NeoFS node. type State int64 const ( // Undefined is unknown state. Undefined State = iota // Online is network unavailable state. Online // Offline is an active state in the network. Offline ) // PeerWithState groups information about peer // and its state in network map. type PeerWithState struct { peer []byte state State } func (ps PeerWithState) State() State { return ps.state } func (ps PeerWithState) Peer() []byte { return ps.peer } const ( nodeInfoFixedPrmNumber = 1 peerWithStateFixedPrmNumber = 2 ) // Peers return the list of peers from // network map in a binary format. func (g GetNetMapValues) Peers() [][]byte { return g.peers } // GetNetMapArgs groups the arguments // of get network map test invoke call. type GetNetMapArgs struct{} // NetMap performs the test invoke of get network map // method of NeoFS Netmap contract. func (c *Client) NetMap(_ GetNetMapArgs) (*GetNetMapValues, error) { invokePrm := client.TestInvokePrm{} invokePrm.SetMethod(netMapMethod) prms, err := c.client.TestInvoke(invokePrm) if err != nil { return nil, fmt.Errorf("could not perform test invocation (%s): %w", netMapMethod, err) } return peersFromStackItems(prms, netMapMethod) } // GetSnapshotArgs groups the arguments // of get netmap snapshot test invoke call. type GetSnapshotArgs struct { diff uint64 } // SetDiff sets argument for snapshot method of // netmap contract. func (g *GetSnapshotArgs) SetDiff(d uint64) { g.diff = d } // Snapshot performs the test invoke of get snapshot of network map // from NeoFS Netmap contract. Contract saves only one previous epoch, // so all invokes with diff > 1 return error. func (c *Client) Snapshot(a GetSnapshotArgs) (*GetNetMapValues, error) { invokePrm := client.TestInvokePrm{} invokePrm.SetMethod(snapshotMethod) invokePrm.SetArgs(int64(a.diff)) prms, err := c.client.TestInvoke(invokePrm) if err != nil { return nil, fmt.Errorf("could not perform test invocation (%s): %w", netMapMethod, err) } return peersFromStackItems(prms, snapshotMethod) } // EpochSnapshotArgs groups the arguments // of snapshot by epoch test invoke call. type EpochSnapshotArgs struct { epoch uint64 } // SetEpoch sets epoch number to get snapshot. func (a *EpochSnapshotArgs) SetEpoch(d uint64) { a.epoch = d } // EpochSnapshotValues groups the stack parameters // returned by snapshot by epoch test invoke. type EpochSnapshotValues struct { *GetNetMapValues } // EpochSnapshot performs the test invoke of get snapshot of network map by epoch // from NeoFS Netmap contract. func (c *Client) EpochSnapshot(args EpochSnapshotArgs) (*EpochSnapshotValues, error) { invokePrm := client.TestInvokePrm{} invokePrm.SetMethod(epochSnapshotMethod) invokePrm.SetArgs(int64(args.epoch)) prms, err := c.client.TestInvoke(invokePrm) if err != nil { return nil, fmt.Errorf("could not perform test invocation (%s): %w", epochSnapshotMethod, err) } nmVals, err := peersFromStackItems(prms, epochSnapshotMethod) if err != nil { return nil, err } return &EpochSnapshotValues{ GetNetMapValues: nmVals, }, nil } // GetNetMapCandidatesArgs groups the arguments // of get network map candidates test invoke call. type GetNetMapCandidatesArgs struct{} // GetNetMapCandidatesValues groups the stack parameters // returned by get network map candidates test invoke. type GetNetMapCandidatesValues struct { netmapNodes []*PeerWithState } func (g GetNetMapCandidatesValues) NetmapNodes() []*PeerWithState { return g.netmapNodes } func (c *Client) Candidates(_ GetNetMapCandidatesArgs) (*GetNetMapCandidatesValues, error) { invokePrm := client.TestInvokePrm{} invokePrm.SetMethod(netMapCandidatesMethod) prms, err := c.client.TestInvoke(invokePrm) if err != nil { return nil, fmt.Errorf("could not perform test invocation (%s): %w", netMapCandidatesMethod, err) } candVals, err := peersWithStateFromStackItems(prms, netMapCandidatesMethod) if err != nil { return nil, fmt.Errorf("could not parse contract response: %w", err) } return candVals, nil } func peersWithStateFromStackItems(stack []stackitem.Item, method string) (*GetNetMapCandidatesValues, error) { if ln := len(stack); ln != 1 { return nil, fmt.Errorf("unexpected stack item count (%s): %d", method, ln) } netmapNodes, err := client.ArrayFromStackItem(stack[0]) if err != nil { return nil, fmt.Errorf("could not get stack item array from stack item (%s): %w", method, err) } res := &GetNetMapCandidatesValues{ netmapNodes: make([]*PeerWithState, 0, len(netmapNodes)), } for i := range netmapNodes { node, err := peerWithStateFromStackItem(netmapNodes[i]) if err != nil { return nil, fmt.Errorf("could not parse stack item (Peer #%d): %w", i, err) } res.netmapNodes = append(res.netmapNodes, node) } return res, nil } func peerWithStateFromStackItem(prm stackitem.Item) (*PeerWithState, error) { prms, err := client.ArrayFromStackItem(prm) if err != nil { return nil, fmt.Errorf("could not get stack item array (PeerWithState): %w", err) } else if ln := len(prms); ln != peerWithStateFixedPrmNumber { return nil, fmt.Errorf( "unexpected stack item count (PeerWithState): expected %d, has %d", peerWithStateFixedPrmNumber, ln, ) } var res PeerWithState // peer if res.peer, err = peerInfoFromStackItem(prms[0]); err != nil { return nil, fmt.Errorf("could not get bytes from 'node' field of PeerWithState: %w", err) } // state state, err := client.IntFromStackItem(prms[1]) if err != nil { return nil, fmt.Errorf("could not get int from 'state' field of PeerWithState: %w", err) } switch state { case 1: res.state = Online case 2: res.state = Offline default: res.state = Undefined } return &res, nil } func peersFromStackItems(stack []stackitem.Item, method string) (*GetNetMapValues, error) { if ln := len(stack); ln != 1 { return nil, fmt.Errorf("unexpected stack item count (%s): %d", method, ln) } peers, err := client.ArrayFromStackItem(stack[0]) if err != nil { return nil, fmt.Errorf("could not get stack item array from stack item (%s): %w", method, err) } res := &GetNetMapValues{ peers: make([][]byte, 0, len(peers)), } for i := range peers { peer, err := peerInfoFromStackItem(peers[i]) if err != nil { return nil, fmt.Errorf("could not parse stack item (Peer #%d): %w", i, err) } res.peers = append(res.peers, peer) } return res, nil } func peerInfoFromStackItem(prm stackitem.Item) ([]byte, error) { prms, err := client.ArrayFromStackItem(prm) if err != nil { return nil, fmt.Errorf("could not get stack item array (PeerInfo): %w", err) } else if ln := len(prms); ln != nodeInfoFixedPrmNumber { return nil, fmt.Errorf( "unexpected stack item count (PeerInfo): expected %d, has %d", nodeInfoFixedPrmNumber, ln, ) } return client.BytesFromStackItem(prms[0]) }