lotus/cli/paych.go

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package cli
import (
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"bytes"
"encoding/base64"
"fmt"
"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/specs-actors/actors/builtin/paych"
"gopkg.in/urfave/cli.v2"
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types "github.com/filecoin-project/lotus/chain/types"
)
var paychCmd = &cli.Command{
Name: "paych",
Usage: "Manage payment channels",
Subcommands: []*cli.Command{
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paychGetCmd,
paychListCmd,
paychVoucherCmd,
},
}
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var paychGetCmd = &cli.Command{
Name: "get",
Usage: "Create a new payment channel or get existing one",
ArgsUsage: "[fromAddress toAddress amount]",
Action: func(cctx *cli.Context) error {
if cctx.Args().Len() != 3 {
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return fmt.Errorf("must pass three arguments: <from> <to> <available funds>")
}
from, err := address.NewFromString(cctx.Args().Get(0))
if err != nil {
return fmt.Errorf("failed to parse from address: %s", err)
}
to, err := address.NewFromString(cctx.Args().Get(1))
if err != nil {
return fmt.Errorf("failed to parse to address: %s", err)
}
amt, err := types.BigFromString(cctx.Args().Get(2))
if err != nil {
return fmt.Errorf("parsing amount failed: %s", err)
}
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
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info, err := api.PaychGet(ctx, from, to, amt)
if err != nil {
return err
}
fmt.Println(info.Channel.String())
return nil
},
}
var paychListCmd = &cli.Command{
Name: "list",
Usage: "List all locally registered payment channels",
Action: func(cctx *cli.Context) error {
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
chs, err := api.PaychList(ctx)
if err != nil {
return err
}
for _, v := range chs {
fmt.Println(v.String())
}
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 fmt.Errorf("must pass two arguments: <channel> <amount>")
}
ch, err := address.NewFromString(cctx.Args().Get(0))
if err != nil {
return err
}
amt, err := types.BigFromString(cctx.Args().Get(1))
if err != nil {
return err
}
lane := cctx.Int("lane")
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
sv, err := api.PaychVoucherCreate(ctx, ch, amt, uint64(lane))
if err != nil {
return err
}
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enc, err := EncodedString(sv)
if err != nil {
return err
}
fmt.Println(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 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
}
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
if err := api.PaychVoucherCheckValid(ctx, ch, sv); err != nil {
return err
}
fmt.Println("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 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
}
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
// TODO: allow passing proof bytes
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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{
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Name: "export",
Usage: "Print export strings",
},
},
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 err
}
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
vouchers, err := api.PaychVoucherList(ctx, ch)
if err != nil {
return err
}
for _, v := range vouchers {
if cctx.Bool("export") {
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enc, err := EncodedString(v)
if err != nil {
return err
}
fmt.Printf("Lane %d, Nonce %d: %s; %s\n", v.Lane, v.Nonce, v.Amount.String(), enc)
} else {
fmt.Printf("Lane %d, Nonce %d: %s\n", v.Lane, v.Nonce, v.Amount.String())
}
}
return nil
},
}
var paychVoucherBestSpendableCmd = &cli.Command{
Name: "best-spendable",
Usage: "Print voucher with highest value that is currently spendable",
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 err
}
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
vouchers, err := api.PaychVoucherList(ctx, ch)
if err != nil {
return err
}
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var best *paych.SignedVoucher
for _, v := range vouchers {
spendable, err := api.PaychVoucherCheckSpendable(ctx, ch, v, nil, nil)
if err != nil {
return err
}
if spendable {
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if best == nil || v.Amount.GreaterThan(best.Amount) {
best = v
}
}
}
if best == nil {
return fmt.Errorf("No spendable vouchers for that channel")
}
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enc, err := EncodedString(best)
if err != nil {
return err
}
fmt.Println(enc)
fmt.Printf("Amount: %s\n", best.Amount)
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 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
}
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api, closer, err := GetFullNodeAPI(cctx)
if err != nil {
return err
}
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defer closer()
ctx := ReqContext(cctx)
mcid, err := api.PaychVoucherSubmit(ctx, ch, sv)
if err != nil {
return err
}
mwait, err := api.StateWaitMsg(ctx, mcid)
if err != nil {
return err
}
if mwait.Receipt.ExitCode != 0 {
return fmt.Errorf("message execution failed (exit code %d)", mwait.Receipt.ExitCode)
}
fmt.Println("channel updated succesfully")
return nil
},
}
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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
}