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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 logspec
import (
"encoding/json"
"errors"
)
// LedgerType is an enum identifying a specific type of LedgerEvent
// TODO Maybe this should be called LedgerEventType, since these are not actually types of ledgers
//
//go:generate stringer -type=LedgerType
type LedgerType int
const (
// WroteBlock is emitted whenever a block is written to the ledger
WroteBlock LedgerType = iota
numLedgerTypes // keep this last
)
// LedgerEvent represents data corresponding to an event occurring related to the ledger
type LedgerEvent struct {
Event
Type LedgerType
// Round of the block just written
Round uint64
// Hash is the block hash of the block just written
Hash string
// Number of transactions in the block just written
TxnCount int
}
func ledgerTypeFromString(s string) (LedgerType, bool) {
for i := 0; i < int(numLedgerTypes); i++ {
t := LedgerType(i)
if t.String() == s {
return t, true
}
}
return 0, false
}
// UnmarshalJSON initializes the LedgerType from a JSON string contained in a byte buffer.
// An error is returned if a valid LedgerType can't be parsed from the buffer.
func (t *LedgerType) UnmarshalJSON(b []byte) error {
var raw string
err := json.Unmarshal(b, &raw)
if err != nil {
return err
}
typeConst, ok := ledgerTypeFromString(raw)
if !ok {
return errors.New("invalid LedgerType field")
}
*t = typeConst
return nil
}
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