added sell command.

Author: steenzout

internal/selllimit/selllimit.go

@@ -0,0 +1,117 @@
+//
+// Copyright 2015-2019 Pedro Salgado
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package selllimit
+
+import (
+	"fmt"
+
+	"github.com/shopspring/decimal"
+	"github.com/steenzout/go-env"
+	"github.com/toorop/go-bittrex"
+
+	cli "gopkg.in/urfave/cli.v1"
+)
+
+const (
+	// resolution number of digits after the decimal point.
+	resolution = 8
+
+	// flags
+	flagKey    = "key"
+	flagSecret = "secret"
+
+	// EnvBittrexKey environment variable containing the Bittrex key.
+	EnvBittrexKey = "BITTREX_KEY"
+	// EnvBittrexSecret environment variable containing the Bittrex secret.
+	EnvBittrexSecret = "BITTREX_SECRET"
+)
+
+var (
+	// arguments
+	key      string
+	market   string
+	quantity decimal.Decimal
+	rate     decimal.Decimal
+	secret   string
+)
+
+// Key returns the Bittrex jey.
+func Key(c *cli.Context) string {
+	v := c.String(flagKey)
+	if v == "" {
+		return env.GetString(EnvBittrexKey)
+	}
+
+	return v
+}
+
+// Secret returns the Bittrex secret.
+func Secret(c *cli.Context) string {
+	v := c.String(flagSecret)
+	if v == "" {
+		return env.GetString(EnvBittrexSecret)
+	}
+
+	return v
+}
+
+// ValidateArg validate input arguments
+func ValidateArg(c *cli.Context) error {
+	var err error
+
+	if c.NArg() != 3 {
+		return fmt.Errorf("invalid number of arguments")
+	}
+
+	market = c.Args().First()
+
+	quantity, err = decimal.NewFromString(c.Args().Get(1))
+	if err != nil {
+		return err
+	}
+
+	rate, err = decimal.NewFromString(c.Args().Get(2))
+	if err != nil {
+		return err
+	}
+
+	secret = Secret(c)
+
+	key = Key(c)
+
+	return nil
+}
+
+// Run request a SELL order.
+func Run(cctx *cli.Context) error {
+	api := bittrex.New(key, secret)
+
+	orderID, err := api.SellLimit(market, quantity, rate)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf(
+		"order to SELL %s on %s at %s has been submitted: %s\n",
+		quantity.StringFixed(resolution),
+		market,
+		rate.StringFixed(resolution),
+		orderID,
+	)
+
+	return nil
+}

main.go

@@ -26,6 +26,7 @@ import (
 	"github.com/CoinMintTech/go-bittrex-cli/internal/getmarketsummary"
 	"github.com/CoinMintTech/go-bittrex-cli/internal/getticker"
 	"github.com/CoinMintTech/go-bittrex-cli/internal/getticks"
+	"github.com/CoinMintTech/go-bittrex-cli/internal/selllimit"
 	"github.com/CoinMintTech/go-bittrex-cli/internal/subscribeexchangeupdate"
 	"github.com/CoinMintTech/go-bittrex-cli/internal/version"
 )
@@ -81,6 +82,23 @@ func main() {
 				},
 			},
 		},
+		{
+			Name:      "sell",
+			Usage:     "sell <market> <quantity> <rate>",
+			ArgsUsage: "<market> <quantity> <rate>",
+			Before:    selllimit.ValidateArg,
+			Action:    selllimit.Run,
+			Flags: []cli.Flag{
+				cli.StringFlag{
+					Name:  "bittrex-key",
+					Usage: "Bittrex key (optional, BITTREX_KEY environment variable).",
+				},
+				cli.StringFlag{
+					Name:  "bittrex-secret",
+					Usage: "Bittrex secret (optional, BITTREX_SECRET environment variable).",
+				},
+			},
+		},
 		{
 			Name:   "version",
 			Usage:  "version",