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/*
* Copyright 2018 The CovenantSQL Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package sqlchain
import (
pt "github.com/CovenantSQL/CovenantSQL/blockproducer/types"
"github.com/CovenantSQL/CovenantSQL/crypto/asymmetric"
"github.com/CovenantSQL/CovenantSQL/crypto/hash"
"github.com/CovenantSQL/CovenantSQL/proto"
ct "github.com/CovenantSQL/CovenantSQL/sqlchain/types"
wt "github.com/CovenantSQL/CovenantSQL/worker/types"
)
// ChainRPCService defines a sql-chain RPC server.
type ChainRPCService struct {
chain *Chain
}
// AdviseNewBlockReq defines a request of the AdviseNewBlock RPC method.
type AdviseNewBlockReq struct {
Block *ct.Block
Count int32
}
// AdviseNewBlockResp defines a response of the AdviseNewBlock RPC method.
type AdviseNewBlockResp struct {
}
// AdviseBinLogReq defines a request of the AdviseBinLog RPC method.
type AdviseBinLogReq struct {
}
// AdviseBinLogResp defines a response of the AdviseBinLog RPC method.
type AdviseBinLogResp struct {
}
// AdviseResponsedQueryReq defines a request of the AdviseAckedQuery RPC method.
type AdviseResponsedQueryReq struct {
Query *wt.SignedResponseHeader
}
// AdviseResponsedQueryResp defines a response of the AdviseAckedQuery RPC method.
type AdviseResponsedQueryResp struct {
}
// AdviseAckedQueryReq defines a request of the AdviseAckedQuery RPC method.
type AdviseAckedQueryReq struct {
Query *wt.SignedAckHeader
}
// AdviseAckedQueryResp defines a response of the AdviseAckedQuery RPC method.
type AdviseAckedQueryResp struct {
}
// FetchBlockReq defines a request of the FetchBlock RPC method.
type FetchBlockReq struct {
Height int32
}
// FetchBlockResp defines a response of the FetchBlock RPC method.
type FetchBlockResp struct {
Height int32
Block *ct.Block
}
// FetchAckedQueryReq defines a request of the FetchAckedQuery RPC method.
type FetchAckedQueryReq struct {
Height int32
SignedAckedHeaderHash *hash.Hash
}
// FetchAckedQueryResp defines a request of the FetchAckedQuery RPC method.
type FetchAckedQueryResp struct {
Ack *wt.SignedAckHeader
}
// SignBillingReq defines a request of the SignBilling RPC method.
type SignBillingReq struct {
pt.BillingRequest
}
// SignBillingResp defines a response of the SignBilling RPC method.
type SignBillingResp struct {
HeaderHash hash.Hash
Signee *asymmetric.PublicKey
Signature *asymmetric.Signature
}
// LaunchBillingReq defines a request of LaunchBilling RPC method.
type LaunchBillingReq struct {
Low, High int32
}
// LaunchBillingResp defines a response of LaunchBilling RPC method.
type LaunchBillingResp struct {
}
// SubscribeTransactionsReq defines a request of SubscribeTransaction RPC method.
type SubscribeTransactionsReq struct {
SubscriberID proto.NodeID
Height int32
}
// SubscribeTransactionsResp defines a response of SubscribeTransaction RPC method.
type SubscribeTransactionsResp struct {
}
// CancelSubscriptionReq defines a request of CancelSubscription RPC method.
type CancelSubscriptionReq struct {
SubscriberID proto.NodeID
}
// CancelSubscriptionResp defines a response of CancelSubscription RPC method.
type CancelSubscriptionResp struct{}
// AdviseNewBlock is the RPC method to advise a new produced block to the target server.
func (s *ChainRPCService) AdviseNewBlock(req *AdviseNewBlockReq, resp *AdviseNewBlockResp) (
err error) {
s.chain.blocks <- req.Block
return
}
// AdviseBinLog is the RPC method to advise a new binary log to the target server.
func (s *ChainRPCService) AdviseBinLog(req *AdviseBinLogReq, resp *AdviseBinLogResp) error {
// TODO(leventeliu): need implementation.
return nil
}
// AdviseResponsedQuery is the RPC method to advise a new responsed query to the target server.
func (s *ChainRPCService) AdviseResponsedQuery(
req *AdviseResponsedQueryReq, resp *AdviseResponsedQueryResp) error {
return s.chain.VerifyAndPushResponsedQuery(req.Query)
}
// AdviseAckedQuery is the RPC method to advise a new acknowledged query to the target server.
func (s *ChainRPCService) AdviseAckedQuery(
req *AdviseAckedQueryReq, resp *AdviseAckedQueryResp) error {
return s.chain.VerifyAndPushAckedQuery(req.Query)
}
// FetchBlock is the RPC method to fetch a known block from the target server.
func (s *ChainRPCService) FetchBlock(req *FetchBlockReq, resp *FetchBlockResp) (err error) {
resp.Height = req.Height
resp.Block, err = s.chain.FetchBlock(req.Height)
return
}
// FetchAckedQuery is the RPC method to fetch a known block from the target server.
func (s *ChainRPCService) FetchAckedQuery(req *FetchAckedQueryReq, resp *FetchAckedQueryResp,
) (err error) {
resp.Ack, err = s.chain.FetchAckedQuery(req.Height, req.SignedAckedHeaderHash)
return
}
// SignBilling is the RPC method to get signature for a billing request from the target server.
func (s *ChainRPCService) SignBilling(req *SignBillingReq, resp *SignBillingResp) (err error) {
resp.HeaderHash = req.BillingRequest.RequestHash
resp.Signee, resp.Signature, err = s.chain.SignBilling(&req.BillingRequest)
return
}
// LaunchBilling is the RPC method to launch a new billing process in the target server.
func (s *ChainRPCService) LaunchBilling(req *LaunchBillingReq, _ *LaunchBillingResp) error {
return s.chain.LaunchBilling(req.Low, req.High)
}
// SubscribeTransactions is the RPC method to fetch subscribe new packed and confirmed transactions from the target server.
func (s *ChainRPCService) SubscribeTransactions(req *SubscribeTransactionsReq, _ *SubscribeTransactionsResp) error {
return s.chain.addSubscription(req.SubscriberID, req.Height)
}
// CancelSubscription is the RPC method to cancel subscription in the target server.
func (s *ChainRPCService) CancelSubscription(req *CancelSubscriptionReq, _ *CancelSubscriptionResp) error {
return s.chain.cancelSubscription(req.SubscriberID)
}