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// Copyright (C) 2019-2021 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 pooldata
import (
"math"
"github.com/algorand/go-algorand/crypto"
"github.com/algorand/go-algorand/data/transactions"
"github.com/algorand/go-algorand/protocol"
)
// SignedTxGroup used as the in-memory representation of a signed transaction group.
// unlike the plain array of signed transactions, this includes transaction origination and counter
// used by the transaction pool and the transaction sync
//msgp:ignore SignedTxGroup
type SignedTxGroup struct {
// Transactions contains the signed transactions that are included in this transaction group.
Transactions SignedTxnSlice
// LocallyOriginated specify whether the trancation group was inroduced via the REST API or
// by the transaction sync.
LocallyOriginated bool
// GroupCounter is a monotonic increasing counter, that provides an identify for each transaction group.
// The transaction sync is using it as a way to scan the transactions group list more efficiently, as it
// can continue scanning the list from the place where it last stopped.
// GroupCounter is local, assigned when the group is first seen by the local transaction pool.
GroupCounter uint64
// GroupTransactionID is the hash of the entire transaction group.
GroupTransactionID transactions.Txid
// EncodedLength is the length, in bytes, of the messagepack encoding of all the transaction
// within this transaction group.
EncodedLength int
}
// SignedTxnSlice is a slice of SignedTxn(s), allowing us to
// easily define the ID() function.
//msgp:allocbound SignedTxnSlice config.MaxTxGroupSize
type SignedTxnSlice []transactions.SignedTxn
// ID calculate the hash of the signed transaction group.
func (s SignedTxnSlice) ID() transactions.Txid {
enc := s.MarshalMsg(append(protocol.GetEncodingBuf(), []byte(protocol.TxGroup)...))
defer protocol.PutEncodingBuf(enc)
return transactions.Txid(crypto.Hash(enc))
}
// InvalidSignedTxGroupCounter is used to represent an invalid GroupCounter value. It's being used to indicate
// the absence of an entry within a []SignedTxGroup with a particular GroupCounter value.
const InvalidSignedTxGroupCounter = uint64(math.MaxUint64)
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