/
anchoring_data.go
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/
anchoring_data.go
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// Copyright 2019 The klaytn Authors
// This file is part of the klaytn library.
//
// The klaytn 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 klaytn 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 klaytn library. If not, see <http://www.gnu.org/licenses/>.
package types
import (
"encoding/json"
"errors"
"fmt"
"math/big"
"github.com/klaytn/klaytn/common"
"github.com/klaytn/klaytn/rlp"
)
const (
AnchoringDataType0 uint8 = 0
AnchoringJSONDataType uint8 = 128
)
var errUnknownAnchoringTxType = errors.New("unknown anchoring tx type")
type AnchoringDataInternal interface {
GetBlockHash() common.Hash
GetBlockNumber() *big.Int
}
type AnchoringData struct {
Type uint8
Data []byte
}
// AnchoringDataLegacy is an old anchoring type that does not support an data type.
type AnchoringDataLegacy struct {
BlockHash common.Hash `json:"blockHash"`
TxHash common.Hash `json:"transactionsRoot"`
ParentHash common.Hash `json:"parentHash"`
ReceiptHash common.Hash `json:"receiptsRoot"`
StateRootHash common.Hash `json:"stateRoot"`
BlockNumber *big.Int `json:"blockNumber"`
}
func (data *AnchoringDataLegacy) GetBlockHash() common.Hash {
return data.BlockHash
}
func (data *AnchoringDataLegacy) GetBlockNumber() *big.Int {
return data.BlockNumber
}
type AnchoringDataInternalType0 struct {
BlockHash common.Hash `json:"blockHash"`
TxHash common.Hash `json:"transactionsRoot"`
ParentHash common.Hash `json:"parentHash"`
ReceiptHash common.Hash `json:"receiptsRoot"`
StateRootHash common.Hash `json:"stateRoot"`
BlockNumber *big.Int `json:"blockNumber"`
BlockCount *big.Int `json:"blockCount"`
TxCount *big.Int `json:"txCount"`
}
func (data *AnchoringDataInternalType0) GetBlockHash() common.Hash {
return data.BlockHash
}
func (data *AnchoringDataInternalType0) GetBlockNumber() *big.Int {
return data.BlockNumber
}
func NewAnchoringDataType0(block *Block, blockCount uint64, txCount uint64) (*AnchoringData, error) {
data := &AnchoringDataInternalType0{
block.Hash(),
block.Header().TxHash,
block.Header().ParentHash,
block.Header().ReceiptHash,
block.Header().Root,
block.Header().Number,
new(big.Int).SetUint64(blockCount),
new(big.Int).SetUint64(txCount),
}
encodedCCTxData, err := rlp.EncodeToBytes(data)
if err != nil {
return nil, err
}
return &AnchoringData{AnchoringDataType0, encodedCCTxData}, nil
}
func NewAnchoringJSONDataType(v interface{}) (*AnchoringData, error) {
encoded, err := json.Marshal(v)
if err != nil {
return nil, err
}
return &AnchoringData{AnchoringJSONDataType, encoded}, nil
}
// DecodeAnchoringData decodes an anchoring data used by main and sub bridges.
func DecodeAnchoringData(data []byte) (AnchoringDataInternal, error) {
anchoringData := new(AnchoringData)
if err := rlp.DecodeBytes(data, anchoringData); err != nil {
anchoringDataLegacy := new(AnchoringDataLegacy)
if err := rlp.DecodeBytes(data, anchoringDataLegacy); err != nil {
return nil, err
}
logger.Trace("decoded legacy anchoring tx", "blockNum", anchoringDataLegacy.GetBlockNumber().String(), "blockHash", anchoringDataLegacy.GetBlockHash().String(), "txHash", anchoringDataLegacy.TxHash.String())
return anchoringDataLegacy, nil
}
if anchoringData.Type == AnchoringDataType0 {
anchoringDataInternal := new(AnchoringDataInternalType0)
if err := rlp.DecodeBytes(anchoringData.Data, anchoringDataInternal); err != nil {
return nil, err
}
logger.Trace("decoded type0 anchoring tx", "blockNum", anchoringDataInternal.BlockNumber.String(), "blockHash", anchoringDataInternal.BlockHash.String(), "txHash", anchoringDataInternal.TxHash.String(), "txCount", anchoringDataInternal.TxCount)
return anchoringDataInternal, nil
}
return nil, errUnknownAnchoringTxType
}
// DecodeAnchoringDataToJSON decodes an anchoring data.
func DecodeAnchoringDataToJSON(data []byte) (interface{}, error) {
anchoringData := new(AnchoringData)
if err := rlp.DecodeBytes(data, anchoringData); err != nil {
anchoringDataLegacy := new(AnchoringDataLegacy)
if err := rlp.DecodeBytes(data, anchoringDataLegacy); err != nil {
return nil, err
}
return anchoringDataLegacy, nil
}
if anchoringData.Type == AnchoringDataType0 {
anchoringDataInternal := new(AnchoringDataInternalType0)
if err := rlp.DecodeBytes(anchoringData.Data, anchoringDataInternal); err != nil {
return nil, err
}
return anchoringDataInternal, nil
}
if anchoringData.Type == AnchoringJSONDataType {
var v map[string]interface{}
if err := json.Unmarshal(anchoringData.Data, &v); err != nil {
return nil, err
}
return v, nil
}
return nil, fmt.Errorf("%w type=%v", errUnknownAnchoringTxType, anchoringData.Type)
}