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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 transactions
import (
"fmt"
"github.com/algorand/go-algorand/config"
"github.com/algorand/go-algorand/data/basics"
)
// PaymentTxnFields captures the fields used by payment transactions.
type PaymentTxnFields struct {
_struct struct{} `codec:",omitempty,omitemptyarray"`
Receiver basics.Address `codec:"rcv"`
Amount basics.MicroAlgos `codec:"amt"`
// When CloseRemainderTo is set, it indicates that the
// transaction is requesting that the account should be
// closed, and all remaining funds be transferred to this
// address.
CloseRemainderTo basics.Address `codec:"close"`
}
func (payment PaymentTxnFields) checkSpender(header Header, spec SpecialAddresses, proto config.ConsensusParams) error {
if header.Sender == payment.CloseRemainderTo {
return fmt.Errorf("transaction cannot close account to its sender %v", header.Sender)
}
// the FeeSink account may only spend to the IncentivePool
if header.Sender == spec.FeeSink {
if payment.Receiver != spec.RewardsPool {
return fmt.Errorf("cannot spend from fee sink's address %v to non incentive pool address %v", header.Sender, payment.Receiver)
}
if payment.CloseRemainderTo != (basics.Address{}) {
return fmt.Errorf("cannot close fee sink %v to %v", header.Sender, payment.CloseRemainderTo)
}
}
return nil
}
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