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tx.go
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tx.go
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package cli
import (
"crypto/rand"
"encoding/hex"
"fmt"
"strings"
"github.com/spf13/cobra"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/client/flags"
"github.com/cosmos/cosmos-sdk/client/tx"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/version"
"github.com/furynet/furymod/modules/htlc/types"
)
// NewTxCmd returns the transaction commands for this module
func NewTxCmd() *cobra.Command {
htlcTxCmd := &cobra.Command{
Use: types.ModuleName,
Short: "HTLC transaction subcommands",
DisableFlagParsing: true,
SuggestionsMinimumDistance: 2,
RunE: client.ValidateCmd,
}
htlcTxCmd.AddCommand(
GetCmdCreateHTLC(),
GetCmdClaimHTLC(),
)
return htlcTxCmd
}
// GetCmdCreateHTLC implements creating an HTLC command
func GetCmdCreateHTLC() *cobra.Command {
cmd := &cobra.Command{
Use: "create",
Short: "Create an HTLC",
Long: "Create an HTLC.",
Example: fmt.Sprintf(
"$ %s tx htlc create "+
"--to=<recipient> "+
"--receiver-on-other-chain=<receiver-on-other-chain> "+
"--sender-on-other-chain=<sender-on-other-chain> "+
"--amount=<amount> "+
"--hash-lock=<hash-lock> "+
"--timestamp=<timestamp> "+
"--time-lock=<time-lock> "+
"--transfer=false "+
"--from=mykey",
version.AppName,
),
PreRunE: preCheckCmd,
RunE: func(cmd *cobra.Command, args []string) error {
clientCtx, err := client.GetClientTxContext(cmd)
if err != nil {
return err
}
sender := clientCtx.GetFromAddress()
toAddr, err := cmd.Flags().GetString(FlagTo)
if err != nil {
return err
}
if _, err := sdk.AccAddressFromBech32(toAddr); err != nil {
return err
}
receiverOnOtherChain, err := cmd.Flags().GetString(FlagReceiverOnOtherChain)
if err != nil {
return err
}
senderOnOtherChain, err := cmd.Flags().GetString(FlagSenderOnOtherChain)
if err != nil {
return err
}
amountStr, err := cmd.Flags().GetString(FlagAmount)
if err != nil {
return err
}
amount, err := sdk.ParseCoinsNormalized(amountStr)
if err != nil {
return err
}
timestamp, err := cmd.Flags().GetUint64(FlagTimestamp)
if err != nil {
return err
}
timeLock, err := cmd.Flags().GetUint64(FlagTimeLock)
if err != nil {
return err
}
transfer, err := cmd.Flags().GetBool(FlagTransfer)
if err != nil {
return err
}
secret := make([]byte, 32)
var hashLock []byte
flags := cmd.Flags()
if flags.Changed(FlagHashLock) {
hashLock, err = cmd.Flags().GetBytesHex(FlagHashLock)
if err != nil {
return err
}
} else if flags.Changed(FlagSecret) {
if secret, err = cmd.Flags().GetBytesHex(FlagSecret); err != nil {
return err
}
hashLock = types.GetHashLock(secret, timestamp)
} else {
if _, err = rand.Read(secret); err != nil {
return err
}
hashLock = types.GetHashLock(secret, timestamp)
}
msg := types.NewMsgCreateHTLC(
sender.String(), toAddr, receiverOnOtherChain,
senderOnOtherChain, amount, hex.EncodeToString(hashLock),
timestamp, timeLock, transfer,
)
if err := msg.ValidateBasic(); err != nil {
return err
}
if err = tx.GenerateOrBroadcastTxCLI(clientCtx, cmd.Flags(), &msg); err == nil && !flags.Changed(FlagHashLock) {
fmt.Println("**Important** save this secret, hashLock in a safe place.")
fmt.Println("It is the only way to claim or refund the locked coins from an HTLC")
fmt.Println()
fmt.Printf("Secret: %s\nHashLock: %s\n",
strings.ToUpper(hex.EncodeToString(secret)), strings.ToUpper(hex.EncodeToString(hashLock)),
)
}
return err
},
}
cmd.Flags().AddFlagSet(FsCreateHTLC)
_ = cmd.MarkFlagRequired(FlagTo)
_ = cmd.MarkFlagRequired(FlagAmount)
_ = cmd.MarkFlagRequired(FlagTimeLock)
flags.AddTxFlagsToCmd(cmd)
return cmd
}
// GetCmdClaimHTLC implements claiming an HTLC command
func GetCmdClaimHTLC() *cobra.Command {
cmd := &cobra.Command{
Use: "claim [id] [secret]",
Short: "Claim an HTLC",
Long: "Claim an open HTLC with a secret.",
Example: fmt.Sprintf("$ %s tx htlc claim <id> <secret> --from mykey", version.AppName),
Args: cobra.ExactArgs(2),
RunE: func(cmd *cobra.Command, args []string) error {
clientCtx, err := client.GetClientTxContext(cmd)
if err != nil {
return err
}
sender := clientCtx.GetFromAddress().String()
if _, err := hex.DecodeString(args[0]); err != nil {
return err
}
if _, err := hex.DecodeString(args[1]); err != nil {
return err
}
msg := types.NewMsgClaimHTLC(sender, args[0], args[1])
if err := msg.ValidateBasic(); err != nil {
return err
}
return tx.GenerateOrBroadcastTxCLI(clientCtx, cmd.Flags(), &msg)
},
}
flags.AddTxFlagsToCmd(cmd)
return cmd
}
func preCheckCmd(cmd *cobra.Command, _ []string) error {
flags := cmd.Flags()
if flags.Changed(FlagSecret) && flags.Changed(FlagHashLock) {
return fmt.Errorf("can not provide both the secret and hash lock")
}
return nil
}