package morph import ( "errors" "fmt" nns "github.com/nspcc-dev/neo-go/examples/nft-nd-nns" "github.com/nspcc-dev/neo-go/pkg/core/transaction" "github.com/nspcc-dev/neo-go/pkg/io" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag" "github.com/nspcc-dev/neo-go/pkg/util" "github.com/nspcc-dev/neo-go/pkg/vm" "github.com/nspcc-dev/neo-go/pkg/vm/emit" "github.com/spf13/cobra" "github.com/spf13/viper" ) func forceNewEpochCmd(cmd *cobra.Command, args []string) error { wCtx, err := newInitializeContext(cmd, viper.GetViper()) if err != nil { return fmt.Errorf("can't to initialize context: %w", err) } cs, err := wCtx.Client.GetContractStateByID(1) if err != nil { return fmt.Errorf("can't get NNS contract info: %w", err) } res, err := wCtx.Client.InvokeFunction(cs.Hash, "resolve", []smartcontract.Parameter{ {Type: smartcontract.StringType, Value: netmapContract + ".neofs"}, {Type: smartcontract.IntegerType, Value: int64(nns.TXT)}, }, nil) if err != nil { return fmt.Errorf("can't get netmap contract hash: %w", err) } if len(res.Stack) == 0 { return errors.New("empty response from NNS") } var nmHash util.Uint160 bs, err := res.Stack[0].TryBytes() if err == nil { nmHash, err = util.Uint160DecodeStringLE(string(bs)) } if err != nil { return fmt.Errorf("invalid response from NNS contract: %w", err) } res, err = wCtx.Client.InvokeFunction(nmHash, "epoch", []smartcontract.Parameter{}, []transaction.Signer{{ Account: wCtx.CommitteeAcc.Contract.ScriptHash(), Scopes: transaction.Global, // Scope is important, as we have nested call to container contract. }}) if err != nil || res.State != vm.HaltState.String() || len(res.Stack) == 0 { return errors.New("can't fetch current epoch from the netmap contract") } bi, err := res.Stack[0].TryInteger() if err != nil { return fmt.Errorf("can't parse current epoch: %w", err) } newEpoch := bi.Int64() + 1 cmd.Printf("Current epoch: %s, increase to %d.\n", bi, newEpoch) // In NeoFS this is done via Notary contract. Here, however, we can form the // transaction locally. bw := io.NewBufBinWriter() emit.AppCall(bw.BinWriter, nmHash, "newEpoch", callflag.All, newEpoch) if err := wCtx.sendCommitteeTx(bw.Bytes(), -1); err != nil { return err } return wCtx.awaitTx() }