mirror of https://github.com/poanetwork/quorum.git
127 lines
4.2 KiB
Go
127 lines
4.2 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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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
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// 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
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// 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 (
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"encoding/json"
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"errors"
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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/common/hexutil"
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"github.com/ethereum/go-ethereum/rlp"
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)
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var errMissingLogFields = errors.New("missing required JSON log fields")
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// Log represents a contract log event. These events are generated by the LOG
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// opcode and stored/indexed by the node.
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type Log struct {
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// Consensus fields.
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Address common.Address // address of the contract that generated the event
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Topics []common.Hash // list of topics provided by the contract.
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Data []byte // supplied by the contract, usually ABI-encoded
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// Derived fields (don't reorder!).
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BlockNumber uint64 // block in which the transaction was included
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TxHash common.Hash // hash of the transaction
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TxIndex uint // index of the transaction in the block
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BlockHash common.Hash // hash of the block in which the transaction was included
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Index uint // index of the log in the receipt
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}
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type jsonLog struct {
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Address *common.Address `json:"address"`
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Topics *[]common.Hash `json:"topics"`
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Data *hexutil.Bytes `json:"data"`
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BlockNumber *hexutil.Uint64 `json:"blockNumber"`
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TxIndex *hexutil.Uint `json:"transactionIndex"`
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TxHash *common.Hash `json:"transactionHash"`
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BlockHash *common.Hash `json:"blockHash"`
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Index *hexutil.Uint `json:"logIndex"`
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}
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func NewLog(address common.Address, topics []common.Hash, data []byte, number uint64) *Log {
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return &Log{Address: address, Topics: topics, Data: data, BlockNumber: number}
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}
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func (l *Log) EncodeRLP(w io.Writer) error {
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return rlp.Encode(w, []interface{}{l.Address, l.Topics, l.Data})
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}
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func (l *Log) DecodeRLP(s *rlp.Stream) error {
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var log struct {
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Address common.Address
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Topics []common.Hash
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Data []byte
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}
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if err := s.Decode(&log); err != nil {
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return err
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}
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l.Address, l.Topics, l.Data = log.Address, log.Topics, log.Data
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return nil
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}
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func (l *Log) String() string {
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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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}
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// MarshalJSON implements json.Marshaler.
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func (r *Log) MarshalJSON() ([]byte, error) {
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return json.Marshal(&jsonLog{
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Address: &r.Address,
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Topics: &r.Topics,
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Data: (*hexutil.Bytes)(&r.Data),
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BlockNumber: (*hexutil.Uint64)(&r.BlockNumber),
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TxIndex: (*hexutil.Uint)(&r.TxIndex),
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TxHash: &r.TxHash,
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BlockHash: &r.BlockHash,
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Index: (*hexutil.Uint)(&r.Index),
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})
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}
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// UnmarshalJSON implements json.Umarshaler.
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func (r *Log) UnmarshalJSON(input []byte) error {
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var dec jsonLog
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if err := json.Unmarshal(input, &dec); err != nil {
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return err
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}
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if dec.Address == nil || dec.Topics == nil || dec.Data == nil || dec.BlockNumber == nil ||
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dec.TxIndex == nil || dec.TxHash == nil || dec.BlockHash == nil || dec.Index == nil {
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return errMissingLogFields
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}
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*r = Log{
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Address: *dec.Address,
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Topics: *dec.Topics,
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Data: *dec.Data,
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BlockNumber: uint64(*dec.BlockNumber),
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TxHash: *dec.TxHash,
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TxIndex: uint(*dec.TxIndex),
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BlockHash: *dec.BlockHash,
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Index: uint(*dec.Index),
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}
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return nil
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}
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type Logs []*Log
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// LogForStorage is a wrapper around a Log that flattens and parses the entire
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// content of a log, as opposed to only the consensus fields originally (by hiding
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// the rlp interface methods).
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type LogForStorage Log
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