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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 libgoal
import (
"fmt"
"github.com/algorand/go-algorand/daemon/algod/api/server/v2/generated/model"
"github.com/algorand/go-algorand/data/account"
"github.com/algorand/go-algorand/data/basics"
"github.com/algorand/go-algorand/libgoal/participation"
)
// chooseParticipation chooses which participation keys to use for going online
// based on the address, round number, and available participation databases
func (c *Client) chooseParticipation(address basics.Address, round basics.Round) (part model.ParticipationKey, err error) {
parts, err := c.ListParticipationKeys()
if err != nil {
return
}
// Loop through each of the participation keys; pick the one that expires farthest in the future.
var expiry uint64 = 0
for _, info := range parts {
// Choose the Participation valid for this round that relates to the passed address
// that expires farthest in the future.
// Note that algod will sign votes with all possible Participations. so any should work
// in the short-term.
// In the future we should allow the user to specify exactly which partkeys to register.
if info.Key.VoteFirstValid <= uint64(round) && uint64(round) <= info.Key.VoteLastValid && info.Address == address.String() && info.Key.VoteLastValid > expiry {
part = info
expiry = part.Key.VoteLastValid
}
}
if part.Address == "" {
// Couldn't find one
err = fmt.Errorf("couldn't find a participation key database for address %v valid at round %v in participation registry", address.GetUserAddress(), round)
return
}
return
}
// GenParticipationKeys creates a .partkey database for a given address, fills
// it with keys, and installs it in the right place
func (c *Client) GenParticipationKeys(address string, firstValid, lastValid, keyDilution uint64) (part account.Participation, filePath string, err error) {
installFunc := func(keyPath string) error {
_, err := c.AddParticipationKey(keyPath)
return err
}
return participation.GenParticipationKeysTo(address, firstValid, lastValid, keyDilution, "", installFunc)
}
// ListParticipationKeys returns the available participation keys,
// as a response object.
func (c *Client) ListParticipationKeys() (partKeyFiles model.ParticipationKeysResponse, err error) {
algod, err := c.ensureAlgodClient()
if err == nil {
partKeyFiles, err = algod.GetParticipationKeys()
}
return
}
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