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- // 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 state
- import (
- "fmt"
- "io"
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/private/engine"
- "github.com/ethereum/go-ethereum/rlp"
- )
- // Quorum
- // AccountExtraData is to contain extra data that supplements existing Account data.
- // It is also maintained in a trie to support rollback.
- // Note:
- // - update copy() method
- // - update DecodeRLP and EncodeRLP when adding new field
- type AccountExtraData struct {
- // for privacy enhancements
- PrivacyMetadata *PrivacyMetadata
- // list of public keys managed by the corresponding Tessera.
- // This is for multitenancy
- ManagedParties []string
- }
- func (qmd *AccountExtraData) DecodeRLP(stream *rlp.Stream) error {
- var dataRLP struct {
- // from state.PrivacyMetadata, this is required to support
- // backward compatibility with RLP-encoded state.PrivacyMetadata.
- // Refer to rlp/doc.go for decoding rules.
- CreationTxHash *common.EncryptedPayloadHash `rlp:"nil"`
- // from state.PrivacyMetadata, this is required to support
- // backward compatibility with RLP-encoded state.PrivacyMetadata.
- // Refer to rlp/doc.go for decoding rules.
- PrivacyFlag *engine.PrivacyFlagType `rlp:"nil"`
- Rest []rlp.RawValue `rlp:"tail"` // to maintain forward compatibility
- }
- if err := stream.Decode(&dataRLP); err != nil {
- return err
- }
- if dataRLP.CreationTxHash != nil && dataRLP.PrivacyFlag != nil {
- qmd.PrivacyMetadata = &PrivacyMetadata{
- CreationTxHash: *dataRLP.CreationTxHash,
- PrivacyFlag: *dataRLP.PrivacyFlag,
- }
- }
- if len(dataRLP.Rest) > 0 {
- var managedParties []string
- if err := rlp.DecodeBytes(dataRLP.Rest[0], &managedParties); err != nil {
- return fmt.Errorf("fail to decode managedParties with error %v", err)
- }
- // As RLP encodes empty slice or nil slice as an empty string (192)
- // we won't be able to determine when decoding. So we use pragmatic approach
- // to default to nil value. Downstream usage would deal with it easier.
- if len(managedParties) == 0 {
- qmd.ManagedParties = nil
- } else {
- qmd.ManagedParties = managedParties
- }
- }
- return nil
- }
- func (qmd *AccountExtraData) EncodeRLP(writer io.Writer) error {
- var (
- hash *common.EncryptedPayloadHash
- flag *engine.PrivacyFlagType
- )
- if qmd.PrivacyMetadata != nil {
- hash = &qmd.PrivacyMetadata.CreationTxHash
- flag = &qmd.PrivacyMetadata.PrivacyFlag
- }
- return rlp.Encode(writer, struct {
- CreationTxHash *common.EncryptedPayloadHash `rlp:"nil"`
- PrivacyFlag *engine.PrivacyFlagType `rlp:"nil"`
- ManagedParties []string
- }{
- CreationTxHash: hash,
- PrivacyFlag: flag,
- ManagedParties: qmd.ManagedParties,
- })
- }
- func (qmd *AccountExtraData) copy() *AccountExtraData {
- if qmd == nil {
- return nil
- }
- var copyPM *PrivacyMetadata
- if qmd.PrivacyMetadata != nil {
- copyPM = &PrivacyMetadata{
- CreationTxHash: qmd.PrivacyMetadata.CreationTxHash,
- PrivacyFlag: qmd.PrivacyMetadata.PrivacyFlag,
- }
- }
- copyManagedParties := make([]string, len(qmd.ManagedParties))
- copy(copyManagedParties, qmd.ManagedParties)
- return &AccountExtraData{
- PrivacyMetadata: copyPM,
- ManagedParties: copyManagedParties,
- }
- }
- // attached to every private contract account
- type PrivacyMetadata struct {
- CreationTxHash common.EncryptedPayloadHash `json:"creationTxHash"`
- PrivacyFlag engine.PrivacyFlagType `json:"privacyFlag"`
- }
- // Quorum
- // privacyMetadataRLP struct is to make sure
- // field order is preserved regardless changes in the PrivacyMetadata and its internal
- //
- // Edit this struct with care to make sure forward and backward compatibility
- type privacyMetadataRLP struct {
- CreationTxHash common.EncryptedPayloadHash
- PrivacyFlag engine.PrivacyFlagType
- Rest []rlp.RawValue `rlp:"tail"` // to maintain forward compatibility
- }
- func (p *PrivacyMetadata) DecodeRLP(stream *rlp.Stream) error {
- var dataRLP privacyMetadataRLP
- if err := stream.Decode(&dataRLP); err != nil {
- return err
- }
- p.CreationTxHash = dataRLP.CreationTxHash
- p.PrivacyFlag = dataRLP.PrivacyFlag
- return nil
- }
- func (p *PrivacyMetadata) EncodeRLP(writer io.Writer) error {
- return rlp.Encode(writer, privacyMetadataRLP{
- CreationTxHash: p.CreationTxHash,
- PrivacyFlag: p.PrivacyFlag,
- })
- }
- func NewStatePrivacyMetadata(creationTxHash common.EncryptedPayloadHash, privacyFlag engine.PrivacyFlagType) *PrivacyMetadata {
- return &PrivacyMetadata{
- CreationTxHash: creationTxHash,
- PrivacyFlag: privacyFlag,
- }
- }
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