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// Copyright (C) 2019-2023 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 participation
import (
"fmt"
"os"
"path/filepath"
"github.com/algorand/go-algorand/config"
"github.com/algorand/go-algorand/data/account"
"github.com/algorand/go-algorand/data/basics"
"github.com/algorand/go-algorand/util/db"
)
func participationKeysPath(dataDir string, address basics.Address, firstValid, lastValid basics.Round) (string, error) {
// Build /<dataDir>/<genesisID>/<address>.<first_round>.<last_round>.partkey
first := uint64(firstValid)
last := uint64(lastValid)
fileName := config.PartKeyFilename(address.String(), first, last)
return filepath.Join(dataDir, fileName), nil
}
// GenParticipationKeysTo creates a .partkey database for a given address, fills
// it with keys, and saves it in the specified output directory. If the output
// directory is empty, the key will be installed.
func GenParticipationKeysTo(address string, firstValid, lastValid, keyDilution uint64, outDir string, installFunc func(keyPath string) error) (part account.Participation, filePath string, err error) {
install := outDir == ""
if install && installFunc == nil {
return account.Participation{}, "", fmt.Errorf("must provide an install function when installing keys")
}
// Parse the address
parsedAddr, err := basics.UnmarshalChecksumAddress(address)
if err != nil {
return
}
firstRound, lastRound := basics.Round(firstValid), basics.Round(lastValid)
// If we are installing, generate in the temp dir
if install {
outDir = os.TempDir()
}
// Connect to the database
partKeyPath, err := participationKeysPath(outDir, parsedAddr, firstRound, lastRound)
if err != nil {
return
}
_, err = os.Stat(partKeyPath)
if err == nil {
err = fmt.Errorf("ParticipationKeys exist for the range %d to %d", firstRound, lastRound)
return
} else if !os.IsNotExist(err) {
err = fmt.Errorf("participation key file '%s' cannot be accessed : %w", partKeyPath, err)
return
}
// If the key is being installed, remove it afterwards.
if install {
// Explicitly ignore any errors
defer func(name string) {
_ = os.Remove(name)
}(partKeyPath)
}
partdb, err := db.MakeErasableAccessor(partKeyPath)
if err != nil {
return
}
if keyDilution == 0 {
keyDilution = account.DefaultKeyDilution(firstRound, lastRound)
}
// Fill the database with new participation keys
newPart, err := account.FillDBWithParticipationKeys(partdb, parsedAddr, firstRound, lastRound, keyDilution)
part = newPart.Participation
partdb.Close()
if err != nil {
return
}
if install {
err = installFunc(partKeyPath)
}
return part, partKeyPath, err
}
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