package cli import ( "bytes" "encoding/base64" "fmt" "io" "sort" "strings" "github.com/filecoin-project/lotus/paychmgr" "github.com/filecoin-project/go-address" "github.com/filecoin-project/lotus/build" "github.com/filecoin-project/specs-actors/actors/builtin/paych" "github.com/urfave/cli/v2" types "github.com/filecoin-project/lotus/chain/types" ) var paychCmd = &cli.Command{ Name: "paych", Usage: "Manage payment channels", Subcommands: []*cli.Command{ paychAddFundsCmd, paychListCmd, paychVoucherCmd, paychSettleCmd, paychCloseCmd, }, } var paychAddFundsCmd = &cli.Command{ Name: "add-funds", Usage: "Add funds to the payment channel between fromAddress and toAddress. Creates the payment channel if it doesn't already exist.", ArgsUsage: "[fromAddress toAddress amount]", Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 3 { return ShowHelp(cctx, fmt.Errorf("must pass three arguments: ")) } from, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return ShowHelp(cctx, fmt.Errorf("failed to parse from address: %s", err)) } to, err := address.NewFromString(cctx.Args().Get(1)) if err != nil { return ShowHelp(cctx, fmt.Errorf("failed to parse to address: %s", err)) } amt, err := types.ParseFIL(cctx.Args().Get(2)) if err != nil { return ShowHelp(cctx, fmt.Errorf("parsing amount failed: %s", err)) } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) // Send a message to chain to create channel / add funds to existing // channel info, err := api.PaychGet(ctx, from, to, types.BigInt(amt)) if err != nil { return err } // Wait for the message to be confirmed chAddr, err := api.PaychGetWaitReady(ctx, info.WaitSentinel) if err != nil { return err } fmt.Fprintln(cctx.App.Writer, chAddr) return nil }, } var paychStatusCmd = &cli.Command{ Name: "status", Usage: "Show the status of an outbound payment channel between fromAddress and toAddress", ArgsUsage: "[fromAddress toAddress]", Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 2 { return ShowHelp(cctx, fmt.Errorf("must pass two arguments: ")) } from, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return ShowHelp(cctx, fmt.Errorf("failed to parse from address: %s", err)) } to, err := address.NewFromString(cctx.Args().Get(1)) if err != nil { return ShowHelp(cctx, fmt.Errorf("failed to parse to address: %s", err)) } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() avail, err := api.PaychAvailableFunds(from, to) if err != nil { return err } if avail.Channel == nil { if avail.PendingWaitSentinel != nil { fmt.Fprint(cctx.App.Writer, "Creating channel\n") fmt.Fprintf(cctx.App.Writer, " From: %s\n", from) fmt.Fprintf(cctx.App.Writer, " To: %s\n", to) fmt.Fprintf(cctx.App.Writer, " Pending Amt: %d\n", avail.PendingAmt) fmt.Fprintf(cctx.App.Writer, " Wait Sentinel: %s\n", avail.PendingWaitSentinel) return nil } fmt.Fprint(cctx.App.Writer, "Channel does not exist\n") fmt.Fprintf(cctx.App.Writer, " From: %s\n", from) fmt.Fprintf(cctx.App.Writer, " To: %s\n", to) return nil } if avail.PendingWaitSentinel != nil { fmt.Fprint(cctx.App.Writer, "Adding Funds to channel\n") } else { fmt.Fprint(cctx.App.Writer, "Channel exists\n") } nameValues := [][]string{ {"Channel", avail.Channel.String()}, {"From", from.String()}, {"To", to.String()}, {"Confirmed Amt", fmt.Sprintf("%d", avail.ConfirmedAmt)}, {"Pending Amt", fmt.Sprintf("%d", avail.PendingAmt)}, {"Queued Amt", fmt.Sprintf("%d", avail.QueuedAmt)}, {"Voucher Redeemed Amt", fmt.Sprintf("%d", avail.VoucherReedeemedAmt)}, } if avail.PendingWaitSentinel != nil { nameValues = append(nameValues, []string{ "Add Funds Wait Sentinel", avail.PendingWaitSentinel.String(), }) } fmt.Fprint(cctx.App.Writer, formatNameValues(nameValues)) return nil }, } func formatNameValues(nameValues [][]string) string { maxLen := 0 for _, nv := range nameValues { if len(nv[0]) > maxLen { maxLen = len(nv[0]) } } out := make([]string, len(nameValues)) for i, nv := range nameValues { namePad := strings.Repeat(" ", maxLen-len(nv[0])) out[i] = " " + nv[0] + ": " + namePad + nv[1] } return strings.Join(out, "\n") + "\n" } var paychListCmd = &cli.Command{ Name: "list", Usage: "List all locally registered payment channels", Action: func(cctx *cli.Context) error { api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) chs, err := api.PaychList(ctx) if err != nil { return err } for _, v := range chs { fmt.Fprintln(cctx.App.Writer, v.String()) } return nil }, } var paychSettleCmd = &cli.Command{ Name: "settle", Usage: "Settle a payment channel", ArgsUsage: "[channelAddress]", Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 1 { return fmt.Errorf("must pass payment channel address") } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return fmt.Errorf("failed to parse payment channel address: %s", err) } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) mcid, err := api.PaychSettle(ctx, ch) if err != nil { return err } mwait, err := api.StateWaitMsg(ctx, mcid, build.MessageConfidence) if err != nil { return nil } if mwait.Receipt.ExitCode != 0 { return fmt.Errorf("settle message execution failed (exit code %d)", mwait.Receipt.ExitCode) } fmt.Fprintf(cctx.App.Writer, "Settled channel %s\n", ch) return nil }, } var paychCloseCmd = &cli.Command{ Name: "collect", Usage: "Collect funds for a payment channel", ArgsUsage: "[channelAddress]", Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 1 { return fmt.Errorf("must pass payment channel address") } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return fmt.Errorf("failed to parse payment channel address: %s", err) } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) mcid, err := api.PaychCollect(ctx, ch) if err != nil { return err } mwait, err := api.StateWaitMsg(ctx, mcid, build.MessageConfidence) if err != nil { return nil } if mwait.Receipt.ExitCode != 0 { return fmt.Errorf("collect message execution failed (exit code %d)", mwait.Receipt.ExitCode) } fmt.Fprintf(cctx.App.Writer, "Collected funds for channel %s\n", ch) return nil }, } var paychVoucherCmd = &cli.Command{ Name: "voucher", Usage: "Interact with payment channel vouchers", Subcommands: []*cli.Command{ paychVoucherCreateCmd, paychVoucherCheckCmd, paychVoucherAddCmd, paychVoucherListCmd, paychVoucherBestSpendableCmd, paychVoucherSubmitCmd, }, } var paychVoucherCreateCmd = &cli.Command{ Name: "create", Usage: "Create a signed payment channel voucher", ArgsUsage: "[channelAddress amount]", Flags: []cli.Flag{ &cli.IntFlag{ Name: "lane", Value: 0, Usage: "specify payment channel lane to use", }, }, Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 2 { return ShowHelp(cctx, fmt.Errorf("must pass two arguments: ")) } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return err } amt, err := types.ParseFIL(cctx.Args().Get(1)) if err != nil { return ShowHelp(cctx, fmt.Errorf("parsing amount failed: %s", err)) } lane := cctx.Int("lane") api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) v, err := api.PaychVoucherCreate(ctx, ch, types.BigInt(amt), uint64(lane)) if err != nil { return err } if v.Voucher == nil { return fmt.Errorf("Could not create voucher: insufficient funds in channel, shortfall: %d", v.Shortfall) } enc, err := EncodedString(v.Voucher) if err != nil { return err } fmt.Fprintln(cctx.App.Writer, enc) return nil }, } var paychVoucherCheckCmd = &cli.Command{ Name: "check", Usage: "Check validity of payment channel voucher", ArgsUsage: "[channelAddress voucher]", Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 2 { return ShowHelp(cctx, fmt.Errorf("must pass payment channel address and voucher to validate")) } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return err } sv, err := types.DecodeSignedVoucher(cctx.Args().Get(1)) if err != nil { return err } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) if err := api.PaychVoucherCheckValid(ctx, ch, sv); err != nil { return err } fmt.Fprintln(cctx.App.Writer, "voucher is valid") return nil }, } var paychVoucherAddCmd = &cli.Command{ Name: "add", Usage: "Add payment channel voucher to local datastore", ArgsUsage: "[channelAddress voucher]", Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 2 { return ShowHelp(cctx, fmt.Errorf("must pass payment channel address and voucher")) } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return err } sv, err := types.DecodeSignedVoucher(cctx.Args().Get(1)) if err != nil { return err } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) // TODO: allow passing proof bytes if _, err := api.PaychVoucherAdd(ctx, ch, sv, nil, types.NewInt(0)); err != nil { return err } return nil }, } var paychVoucherListCmd = &cli.Command{ Name: "list", Usage: "List stored vouchers for a given payment channel", ArgsUsage: "[channelAddress]", Flags: []cli.Flag{ &cli.BoolFlag{ Name: "export", Usage: "Print voucher as serialized string", }, }, Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 1 { return ShowHelp(cctx, fmt.Errorf("must pass payment channel address")) } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return err } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) vouchers, err := api.PaychVoucherList(ctx, ch) if err != nil { return err } for _, v := range sortVouchers(vouchers) { export := cctx.Bool("export") err := outputVoucher(cctx.App.Writer, v, export) if err != nil { return err } } return nil }, } var paychVoucherBestSpendableCmd = &cli.Command{ Name: "best-spendable", Usage: "Print vouchers with highest value that is currently spendable for each lane", ArgsUsage: "[channelAddress]", Flags: []cli.Flag{ &cli.BoolFlag{ Name: "export", Usage: "Print voucher as serialized string", }, }, Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 1 { return ShowHelp(cctx, fmt.Errorf("must pass payment channel address")) } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return err } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) vouchersByLane, err := paychmgr.BestSpendableByLane(ctx, api, ch) if err != nil { return err } var vouchers []*paych.SignedVoucher for _, vchr := range vouchersByLane { vouchers = append(vouchers, vchr) } for _, best := range sortVouchers(vouchers) { export := cctx.Bool("export") err := outputVoucher(cctx.App.Writer, best, export) if err != nil { return err } } return nil }, } func sortVouchers(vouchers []*paych.SignedVoucher) []*paych.SignedVoucher { sort.Slice(vouchers, func(i, j int) bool { if vouchers[i].Lane == vouchers[j].Lane { return vouchers[i].Nonce < vouchers[j].Nonce } return vouchers[i].Lane < vouchers[j].Lane }) return vouchers } func outputVoucher(w io.Writer, v *paych.SignedVoucher, export bool) error { var enc string if export { var err error enc, err = EncodedString(v) if err != nil { return err } } fmt.Fprintf(w, "Lane %d, Nonce %d: %s", v.Lane, v.Nonce, v.Amount.String()) if export { fmt.Fprintf(w, "; %s", enc) } fmt.Fprintln(w) return nil } var paychVoucherSubmitCmd = &cli.Command{ Name: "submit", Usage: "Submit voucher to chain to update payment channel state", ArgsUsage: "[channelAddress voucher]", Action: func(cctx *cli.Context) error { if cctx.Args().Len() != 2 { return ShowHelp(cctx, fmt.Errorf("must pass payment channel address and voucher")) } ch, err := address.NewFromString(cctx.Args().Get(0)) if err != nil { return err } sv, err := types.DecodeSignedVoucher(cctx.Args().Get(1)) if err != nil { return err } api, closer, err := GetFullNodeAPI(cctx) if err != nil { return err } defer closer() ctx := ReqContext(cctx) mcid, err := api.PaychVoucherSubmit(ctx, ch, sv, nil, nil) if err != nil { return err } mwait, err := api.StateWaitMsg(ctx, mcid, build.MessageConfidence) if err != nil { return err } if mwait.Receipt.ExitCode != 0 { return fmt.Errorf("message execution failed (exit code %d)", mwait.Receipt.ExitCode) } fmt.Fprintln(cctx.App.Writer, "channel updated successfully") return nil }, } func EncodedString(sv *paych.SignedVoucher) (string, error) { buf := new(bytes.Buffer) if err := sv.MarshalCBOR(buf); err != nil { return "", err } return base64.RawURLEncoding.EncodeToString(buf.Bytes()), nil }