erigon-pulse/core/vm/log.go
Felix Lange f52a1ae849 core, core/vm, eth/filters: move Removed field into vm.Log
This field used to be assigned by the filter system and returned through
the RPC API. Now that we have a Go client that uses the underlying type,
the field needs to move. It is now assigned to true when the RemovedLogs
event is generated so the filter system doesn't need to care about the
field at all.

While here, remove the log list from ChainSideEvent. There are no users
of this field right now and any potential users could subscribe to
RemovedLogsEvent instead.
2016-12-05 10:57:11 +01:00

191 lines
5.7 KiB
Go

// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// 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,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// 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/>.
package vm
import (
"encoding/json"
"errors"
"fmt"
"io"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/rlp"
)
var errMissingLogFields = errors.New("missing required JSON log fields")
// Log represents a contract log event. These events are generated by the LOG opcode and
// stored/indexed by the node.
type Log struct {
// Consensus fields.
Address common.Address // address of the contract that generated the event
Topics []common.Hash // list of topics provided by the contract.
Data []byte // supplied by the contract, usually ABI-encoded
// Derived fields. These fields are filled in by the node
// but not secured by consensus.
BlockNumber uint64 // block in which the transaction was included
TxHash common.Hash // hash of the transaction
TxIndex uint // index of the transaction in the block
BlockHash common.Hash // hash of the block in which the transaction was included
Index uint // index of the log in the receipt
// The Removed field is true if this log was reverted due to a chain reorganisation.
// You must pay attention to this field if you receive logs through a filter query.
Removed bool
}
type rlpLog struct {
Address common.Address
Topics []common.Hash
Data []byte
}
type rlpStorageLog struct {
Address common.Address
Topics []common.Hash
Data []byte
BlockNumber uint64
TxHash common.Hash
TxIndex uint
BlockHash common.Hash
Index uint
}
type jsonLog struct {
Address *common.Address `json:"address"`
Topics *[]common.Hash `json:"topics"`
Data *hexutil.Bytes `json:"data"`
BlockNumber *hexutil.Uint64 `json:"blockNumber"`
TxIndex *hexutil.Uint `json:"transactionIndex"`
TxHash *common.Hash `json:"transactionHash"`
BlockHash *common.Hash `json:"blockHash"`
Index *hexutil.Uint `json:"logIndex"`
Removed bool `json:"removed"`
}
func NewLog(address common.Address, topics []common.Hash, data []byte, number uint64) *Log {
return &Log{Address: address, Topics: topics, Data: data, BlockNumber: number}
}
// EncodeRLP implements rlp.Encoder.
func (l *Log) EncodeRLP(w io.Writer) error {
return rlp.Encode(w, rlpLog{Address: l.Address, Topics: l.Topics, Data: l.Data})
}
// DecodeRLP implements rlp.Decoder.
func (l *Log) DecodeRLP(s *rlp.Stream) error {
var dec rlpLog
err := s.Decode(&dec)
if err == nil {
l.Address, l.Topics, l.Data = dec.Address, dec.Topics, dec.Data
}
return err
}
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)
}
// MarshalJSON implements json.Marshaler.
func (l *Log) MarshalJSON() ([]byte, error) {
jslog := &jsonLog{
Address: &l.Address,
Topics: &l.Topics,
Data: (*hexutil.Bytes)(&l.Data),
TxIndex: (*hexutil.Uint)(&l.TxIndex),
TxHash: &l.TxHash,
Index: (*hexutil.Uint)(&l.Index),
Removed: l.Removed,
}
// Set block information for mined logs.
if (l.BlockHash != common.Hash{}) {
jslog.BlockHash = &l.BlockHash
jslog.BlockNumber = (*hexutil.Uint64)(&l.BlockNumber)
}
return json.Marshal(jslog)
}
// UnmarshalJSON implements json.Umarshaler.
func (l *Log) UnmarshalJSON(input []byte) error {
var dec jsonLog
if err := json.Unmarshal(input, &dec); err != nil {
return err
}
if dec.Address == nil || dec.Topics == nil || dec.Data == nil ||
dec.TxIndex == nil || dec.TxHash == nil || dec.Index == nil {
return errMissingLogFields
}
declog := Log{
Address: *dec.Address,
Topics: *dec.Topics,
Data: *dec.Data,
TxHash: *dec.TxHash,
TxIndex: uint(*dec.TxIndex),
Index: uint(*dec.Index),
Removed: dec.Removed,
}
// Block information may be missing if the log is received through
// the pending log filter, so it's handled specially here.
if dec.BlockHash != nil && dec.BlockNumber != nil {
declog.BlockHash = *dec.BlockHash
declog.BlockNumber = uint64(*dec.BlockNumber)
}
*l = declog
return nil
}
type Logs []*Log
// LogForStorage is a wrapper around a Log that flattens and parses the entire content of
// a log including non-consensus fields.
type LogForStorage Log
// EncodeRLP implements rlp.Encoder.
func (l *LogForStorage) EncodeRLP(w io.Writer) error {
return rlp.Encode(w, rlpStorageLog{
Address: l.Address,
Topics: l.Topics,
Data: l.Data,
BlockNumber: l.BlockNumber,
TxHash: l.TxHash,
TxIndex: l.TxIndex,
BlockHash: l.BlockHash,
Index: l.Index,
})
}
// DecodeRLP implements rlp.Decoder.
func (l *LogForStorage) DecodeRLP(s *rlp.Stream) error {
var dec rlpStorageLog
err := s.Decode(&dec)
if err == nil {
*l = LogForStorage{
Address: dec.Address,
Topics: dec.Topics,
Data: dec.Data,
BlockNumber: dec.BlockNumber,
TxHash: dec.TxHash,
TxIndex: dec.TxIndex,
BlockHash: dec.BlockHash,
Index: dec.Index,
}
}
return err
}