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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"fmt"
"io"
"os"
"github.com/spf13/cobra"
"github.com/algorand/go-algorand/crypto"
"github.com/algorand/go-algorand/data/basics"
"github.com/algorand/go-algorand/data/transactions"
"github.com/algorand/go-algorand/protocol"
)
var signKeyfile string
var signTxfile string
var signOutfile string
var signMnemonic string
func init() {
signCmd.Flags().StringVarP(&signKeyfile, "keyfile", "k", "", "Private key filename")
signCmd.Flags().StringVarP(&signMnemonic, "mnemonic", "m", "", "Private key mnemonic")
signCmd.Flags().StringVarP(&signTxfile, "txfile", "t", "", "Transaction input filename")
signCmd.MarkFlagRequired("txfile")
signCmd.Flags().StringVarP(&signOutfile, "outfile", "o", "", "Transaction output filename")
signCmd.MarkFlagRequired("outfile")
}
var signCmd = &cobra.Command{
Use: "sign",
Short: "Sign transactions from a file using a private key",
Args: cobra.NoArgs,
Run: func(cmd *cobra.Command, _ []string) {
seed := loadKeyfileOrMnemonic(signKeyfile, signMnemonic)
key := crypto.GenerateSignatureSecrets(seed)
txdata, err := os.ReadFile(signTxfile)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot read transactions from %s: %v\n", signTxfile, err)
os.Exit(1)
}
var outBytes []byte
dec := protocol.NewMsgpDecoderBytes(txdata)
for {
var stxn transactions.SignedTxn
err = dec.Decode(&stxn)
if err == io.EOF {
break
}
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot decode transaction: %v\n", err)
os.Exit(1)
}
stxn.Sig = key.Sign(stxn.Txn)
if stxn.Txn.Sender != basics.Address(key.SignatureVerifier) {
stxn.AuthAddr = basics.Address(key.SignatureVerifier)
}
outBytes = append(outBytes, protocol.Encode(&stxn)...)
}
err = os.WriteFile(signOutfile, outBytes, 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot write signed transactions to %s: %v\n", signOutfile, err)
os.Exit(1)
}
},
}
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