plugeth/core/vm/log.go

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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
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//
// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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import (
"encoding/json"
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"fmt"
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"io"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/rlp"
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)
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type Log struct {
// Consensus fields
Address common.Address
Topics []common.Hash
Data []byte
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// Derived fields (don't reorder!)
BlockNumber uint64
TxHash common.Hash
TxIndex uint
BlockHash common.Hash
Index uint
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}
func NewLog(address common.Address, topics []common.Hash, data []byte, number uint64) *Log {
return &Log{Address: address, Topics: topics, Data: data, BlockNumber: number}
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}
func (l *Log) EncodeRLP(w io.Writer) error {
return rlp.Encode(w, []interface{}{l.Address, l.Topics, l.Data})
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}
func (l *Log) DecodeRLP(s *rlp.Stream) error {
var log struct {
Address common.Address
Topics []common.Hash
Data []byte
}
if err := s.Decode(&log); err != nil {
return err
}
l.Address, l.Topics, l.Data = log.Address, log.Topics, log.Data
return nil
}
func (l *Log) String() string {
return fmt.Sprintf(`log: %x %x %x %x %d %x %d`, l.Address, l.Topics, l.Data, l.TxHash, l.TxIndex, l.BlockHash, l.Index)
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}
func (r *Log) MarshalJSON() ([]byte, error) {
fields := map[string]interface{}{
"address": r.Address,
"data": fmt.Sprintf("%#x", r.Data),
"blockNumber": fmt.Sprintf("%#x", r.BlockNumber),
"logIndex": fmt.Sprintf("%#x", r.Index),
"blockHash": r.BlockHash,
"transactionHash": r.TxHash,
"transactionIndex": fmt.Sprintf("%#x", r.TxIndex),
"topics": r.Topics,
}
return json.Marshal(fields)
}
type Logs []*Log
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// LogForStorage is a wrapper around a Log that flattens and parses the entire
// content of a log, as opposed to only the consensus fields originally (by hiding
// the rlp interface methods).
type LogForStorage Log