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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"
"strconv"
"strings"
"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 multisigKeyfile string
var multisigTxfile string
var multisigOutfile string
var multisigMnemonic string
var msigParams string
func init() {
multisigCmd.AddCommand(appendAuthAddrCmd)
multisigCmd.Flags().StringVarP(&multisigKeyfile, "keyfile", "k", "", "Private key filename")
multisigCmd.Flags().StringVarP(&multisigMnemonic, "mnemonic", "m", "", "Private key mnemonic")
multisigCmd.Flags().StringVarP(&multisigTxfile, "txfile", "t", "", "Transaction input filename")
multisigCmd.MarkFlagRequired("txfile")
multisigCmd.Flags().StringVarP(&multisigOutfile, "outfile", "o", "", "Transaction output filename")
multisigCmd.MarkFlagRequired("outfile")
appendAuthAddrCmd.Flags().StringVarP(&msigParams, "params", "p", "", "Multisig pre image parameters - [threshold] [Address 1] [Address 2] ...")
appendAuthAddrCmd.MarkFlagRequired("params")
appendAuthAddrCmd.Flags().StringVarP(&multisigTxfile, "txfile", "t", "", "Transaction input filename")
appendAuthAddrCmd.MarkFlagRequired("txfile")
appendAuthAddrCmd.Flags().StringVarP(&multisigOutfile, "outfile", "o", "", "Transaction output filename. If not specified, the original file will be modified")
}
var multisigCmd = &cobra.Command{
Use: "multisig",
Short: "Add a multisig signature to transactions from a file using a private key",
Args: cobra.NoArgs,
Run: func(cmd *cobra.Command, _ []string) {
seed := loadKeyfileOrMnemonic(multisigKeyfile, multisigMnemonic)
key := crypto.GenerateSignatureSecrets(seed)
txdata, err := os.ReadFile(multisigTxfile)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot read transactions from %s: %v\n", multisigTxfile, 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)
}
ver, thresh, pks := stxn.Msig.Preimage()
addr, err := crypto.MultisigAddrGen(ver, thresh, pks)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot generate multisig addr: %v\n", err)
os.Exit(1)
}
stxn.Msig, err = crypto.MultisigSign(stxn.Txn, addr, ver, thresh, pks, *key)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot add multisig signature: %v\n", err)
os.Exit(1)
}
outBytes = append(outBytes, protocol.Encode(&stxn)...)
}
err = os.WriteFile(multisigOutfile, outBytes, 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot write signed transactions to %s: %v\n", multisigOutfile, err)
os.Exit(1)
}
},
}
var appendAuthAddrCmd = &cobra.Command{
Use: "append-auth-addr -t [transaction file] -p \"[threshold] [Address 1] [Address 2] ...\"",
Short: "Adds the necessary fields to a transaction that is sent from an account that was rekeyed to a multisig account",
Args: cobra.NoArgs,
Run: func(cmd *cobra.Command, _ []string) {
// Read Transaction
txdata, err := readFile(multisigTxfile)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot read transactions from %s: %v\n", multisigTxfile, err)
os.Exit(1)
}
var outBytes []byte
dec := protocol.NewMsgpDecoderBytes(txdata)
var stxn transactions.SignedTxn
err = dec.Decode(&stxn)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot decode transaction: %v\n", err)
os.Exit(1)
}
// Decode params
params := strings.Split(msigParams, " ")
if len(params) < 3 {
fmt.Fprint(os.Stderr, "Not enough arguments to create the multisig address.\nPlease make sure to specify the threshold and at least 2 addresses\n")
os.Exit(1)
}
threshold, err := strconv.ParseUint(params[0], 10, 8)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to parse the threshold. Make sure it's a number between 1 and 255: %v\n", err)
os.Exit(1)
}
// Convert the addresses into public keys
pks := make([]crypto.PublicKey, len(params[1:]))
for i, addrStr := range params[1:] {
addr, err := basics.UnmarshalChecksumAddress(addrStr)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot decode address: %v\n", err)
os.Exit(1)
}
pks[i] = crypto.PublicKey(addr)
}
addr, err := crypto.MultisigAddrGen(1, uint8(threshold), pks)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot generate multisig addr: %v\n", err)
os.Exit(1)
}
// Generate the multisig and assign to the txn
stxn.Msig = crypto.MultisigPreimageFromPKs(1, uint8(threshold), pks)
// Append the signer since it's a rekey txn
if basics.Address(addr) == stxn.Txn.Sender {
fmt.Fprintf(os.Stderr, "The sender at the msig address should not be the same: %v\n", err)
os.Exit(1)
}
stxn.AuthAddr = basics.Address(addr)
// Write the txn
outBytes = append(outBytes, protocol.Encode(&stxn)...)
// Check if we should override the current file or create a new one
if multisigOutfile == "" {
multisigOutfile = multisigTxfile
}
err = writeFile(multisigOutfile, outBytes, 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot write transactions to %s: %v\n", multisigOutfile, err)
os.Exit(1)
}
},
}
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