forked from FISCO-BCOS/go-sdk
/
consensus_service.go
205 lines (182 loc) · 6.36 KB
/
consensus_service.go
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package consensus
import (
"context"
"encoding/json"
"fmt"
"github.com/FISCO-BCOS/go-sdk/abi/bind"
"github.com/FISCO-BCOS/go-sdk/client"
"github.com/FISCO-BCOS/go-sdk/core/types"
"github.com/FISCO-BCOS/go-sdk/precompiled"
"github.com/ethereum/go-ethereum/common"
)
// consensus precompiled contract error code
const (
lastSealer int64 = -51101
invalidNodeID int64 = -51100
)
// getErrorMessage returns the message of error code
func getErrorMessage(errorCode int64) string {
var message string
switch errorCode {
case lastSealer:
message = "last sealer"
case invalidNodeID:
message = "invalid nodeID"
default:
message = ""
}
return message
}
// errorCodeToError judges whether the error code represents an error
func errorCodeToError(errorCode int64) error {
var errorCodeMessage string
errorCodeMessage = precompiled.GetCommonErrorCodeMessage(errorCode)
if errorCodeMessage != "" {
return fmt.Errorf("error code: %v, error code message: %v", errorCode, errorCodeMessage)
}
errorCodeMessage = getErrorMessage(errorCode)
if errorCodeMessage != "" {
return fmt.Errorf("error code: %v, error code message: %v", errorCode, errorCodeMessage)
}
return nil
}
// Service is a precompile contract service.
type Service struct {
consensus *Consensus
consensusAuth *bind.TransactOpts
client *client.Client
}
// contract address
var consensusPrecompileAddress = common.HexToAddress("0x0000000000000000000000000000000000001003")
// NewConsensusService returns ptr of ConsensusService
func NewConsensusService(client *client.Client) (*Service, error) {
instance, err := NewConsensus(consensusPrecompileAddress, client)
if err != nil {
return nil, fmt.Errorf("construct ConsensusService failed: %+v", err)
}
auth := client.GetTransactOpts()
return &Service{consensus: instance, consensusAuth: auth, client: client}, nil
}
// AddObserver add a new observe node according to the node ID
func (service *Service) AddObserver(nodeID string) (int64, error) {
flag, err := service.isValidNodeID(nodeID)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("AddObserver failed, err: %v", err)
}
if !flag {
return precompiled.DefaultErrorCode, fmt.Errorf("the node is not reachable")
}
observerRaw, err := service.client.GetObserverList(context.Background())
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("get the observer list failed: %v", err)
}
var nodeIDs []string
err = json.Unmarshal(observerRaw, &nodeIDs)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("unmarshal the observer list failed: %v", err)
}
for _, nID := range nodeIDs {
if nID == nodeID {
return precompiled.DefaultErrorCode, fmt.Errorf("the node is already in the observer list")
}
}
_, receipt, err := service.consensus.AddObserver(service.consensusAuth, nodeID)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("ConsensusService addObserver failed: %+v", err)
}
return parseReturnValue(receipt, "addObserver")
}
// AddSealer add a new sealer node according to the node ID
func (service *Service) AddSealer(nodeID string) (int64, error) {
flag, err := service.isValidNodeID(nodeID)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("AddSealer failed, err: %v", err)
}
if !flag {
return precompiled.DefaultErrorCode, fmt.Errorf("the node is not reachable")
}
sealerRaw, err := service.client.GetSealerList(context.Background())
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("get the sealer list failed: %v", err)
}
var nodeIDs []string
err = json.Unmarshal(sealerRaw, &nodeIDs)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("unmarshal the sealer list failed: %v", err)
}
for _, nID := range nodeIDs {
if nID == nodeID {
return precompiled.DefaultErrorCode, fmt.Errorf("the node is already in the sealer list")
}
}
tx, receipt, err := service.consensus.AddSealer(service.consensusAuth, nodeID)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("ConsensusService addSealer failed: %+v", err)
}
_ = tx
return parseReturnValue(receipt, "addSealer")
}
// RemoveNode remove a sealer node according to the node ID
func (service *Service) RemoveNode(nodeID string) (int64, error) {
peersRaw, err := service.client.GetGroupPeers(context.Background())
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("get the group peers failed: %v", err)
}
var nodeIDs []string
err = json.Unmarshal(peersRaw, &nodeIDs)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("unmarshal the group peers failed: %v", err)
}
var flag = true
for _, nID := range nodeIDs {
if nID == nodeID {
flag = false
break
}
}
if flag {
return precompiled.DefaultErrorCode, fmt.Errorf("the node is not a group peer")
}
_, receipt, err := service.consensus.Remove(service.consensusAuth, nodeID)
// maybe will occur something wrong
// when request the receipt from the SDK since the connected node of SDK is removed
//TODO: how to handle the problem that can't get the tx receipt when remove the connected node of SDK
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("ConsensusService Remove failed: %+v", err)
}
return parseReturnValue(receipt, "remove")
}
// isValidNodeID returns true if the nodeID exits in NodeIDList.
func (service *Service) isValidNodeID(nodeID string) (bool, error) {
nodeIDRaw, err := service.client.GetNodeIDList(context.Background())
if err != nil {
return false, fmt.Errorf("get the valid Node IDs failed: %v", err)
}
var nodeIDs []string
err = json.Unmarshal(nodeIDRaw, &nodeIDs)
if err != nil {
return false, fmt.Errorf("unmarshal the valid Node IDs failed: %v", err)
}
var flag = false
for _, nID := range nodeIDs {
if nID == nodeID {
flag = true
}
}
return flag, nil
}
func parseReturnValue(receipt *types.Receipt, name string) (int64, error) {
errorMessage := receipt.GetErrorMessage()
if errorMessage != "" {
return int64(receipt.GetStatus()), fmt.Errorf("receipt.Status err: %v", errorMessage)
}
bigNum, err := precompiled.ParseBigIntFromOutput(ConsensusABI, name, receipt)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("parseReturnValue failed, err: %v", err)
}
errorCode, err := precompiled.BigIntToInt64(bigNum)
if err != nil {
return precompiled.DefaultErrorCode, fmt.Errorf("parseReturnValue failed, err: %v", err)
}
return errorCode, errorCodeToError(errorCode)
}