1 files changed, 114 insertions, 0 deletions
diff --git a/cmd/zoo/utils/shutdown.go b/cmd/zoo/utils/shutdown.go
new file mode 100644
index 000000000..288f664f6
--- /dev/null
+++ b/cmd/zoo/utils/shutdown.go
@@ -0,0 +1,114 @@
+// Copyright 2019 The dexon-consensus Authors
+// This file is part of the dexon-consensus library.
+//
+// The dexon-consensus library is free software: you can redistribute it
+// and/or modify it under the terms of the GNU Lesser General Public License as
+// published by the Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// The dexon-consensus library is distributed in the hope that it will be
+// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+// General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the dexon-consensus library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+package utils
+
+import (
+	"bufio"
+	"context"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"math"
+	"math/big"
+	"os"
+
+	"github.com/dexon-foundation/dexon"
+	"github.com/dexon-foundation/dexon/cmd/zoo/client"
+	"github.com/dexon-foundation/dexon/crypto"
+)
+
+type ShutdownConfig struct {
+	Key      string
+	Endpoint string
+	File     string
+	Batch    bool
+}
+
+func Shutdown(config *ShutdownConfig) {
+	privKey, err := crypto.LoadECDSA(config.Key)
+	if err != nil {
+		panic(err)
+	}
+	addr := crypto.PubkeyToAddress(privKey.PublicKey)
+
+	cl, err := client.New(config.Endpoint)
+	if err != nil {
+		panic(err)
+	}
+
+	file, err := os.Open(config.File)
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+
+	ctxs := make([]*client.TransferContext, 0)
+	reader := bufio.NewReader(file)
+	for {
+		buf, err := reader.ReadString('\n')
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			panic(err)
+		}
+		buf = buf[:len(buf)-1]
+		key, err := hex.DecodeString(buf)
+		if err != nil {
+			panic(err)
+		}
+		prvKey, err := crypto.ToECDSA(key)
+		if err != nil {
+			panic(err)
+		}
+		balance, err := cl.BalanceAt(context.Background(),
+			crypto.PubkeyToAddress(prvKey.PublicKey), nil)
+		if err != nil {
+			panic(err)
+		}
+
+		gasLimit, err := cl.EstimateGas(context.Background(), dexon.CallMsg{})
+		if err != nil {
+			panic(err)
+		}
+		gasPrice, err := cl.SuggestGasPrice(context.Background())
+		if err != nil {
+			panic(err)
+		}
+		gas := new(big.Int).Mul(gasPrice, big.NewInt(int64(gasLimit)))
+		if gas.Cmp(balance) >= 0 {
+			fmt.Println("Skipping account: not enough of DXN", crypto.PubkeyToAddress(prvKey.PublicKey))
+			continue
+		}
+
+		ctx := &client.TransferContext{
+			Key:       prvKey,
+			ToAddress: addr,
+			Amount:    new(big.Int).Sub(balance, gas),
+			Nonce:     math.MaxUint64,
+		}
+		if !config.Batch {
+			cl.Transfer(ctx)
+		} else {
+			ctxs = append(ctxs, ctx)
+		}
+	}
+	if config.Batch {
+		cl.BatchTransfer(ctxs)
+	}
+}