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rpc_client.go
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rpc_client.go
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package modules
import (
"context"
"fmt"
"github.com/tendermint/tendermint/crypto/tmhash"
"github.com/tendermint/tendermint/libs/log"
rpc "github.com/tendermint/tendermint/rpc/client"
rpchttp "github.com/tendermint/tendermint/rpc/client/http"
tmtypes "github.com/tendermint/tendermint/types"
"plugchain-sdk-go/codec"
sdk "plugchain-sdk-go/types"
"plugchain-sdk-go/utils/uuid"
)
type rpcClient struct {
rpc.Client
log.Logger
cdc *codec.LegacyAmino
txDecoder sdk.TxDecoder
}
func NewRPCClient(remote string, cdc *codec.LegacyAmino, txDecoder sdk.TxDecoder, logger log.Logger, timeout uint) sdk.TmClient {
client, err := rpchttp.NewWithTimeout(remote, "/websocket", timeout)
if err != nil {
panic(err)
}
_ = client.Start()
return rpcClient{
Client: client,
Logger: logger,
cdc: cdc,
txDecoder: txDecoder,
}
}
func (r rpcClient) SubscribeNewBlock(builder *sdk.EventQueryBuilder, handler sdk.EventNewBlockHandler) (sdk.Subscription, sdk.Error) {
if builder == nil {
builder = sdk.NewEventQueryBuilder()
}
builder.AddCondition(sdk.Cond(sdk.TypeKey).EQ(tmtypes.EventNewBlock))
query := builder.Build()
return r.SubscribeAny(query, func(data sdk.EventData) {
handler(data.(sdk.EventDataNewBlock))
})
}
func (r rpcClient) SubscribeTx(builder *sdk.EventQueryBuilder, handler sdk.EventTxHandler) (sdk.Subscription, sdk.Error) {
if builder == nil {
builder = sdk.NewEventQueryBuilder()
}
query := builder.AddCondition(sdk.Cond(sdk.TypeKey).EQ(sdk.TxValue)).Build()
return r.SubscribeAny(query, func(data sdk.EventData) {
handler(data.(sdk.EventDataTx))
})
}
func (r rpcClient) SubscribeNewBlockHeader(handler sdk.EventNewBlockHeaderHandler) (sdk.Subscription, sdk.Error) {
query := tmtypes.QueryForEvent(tmtypes.EventNewBlockHeader).String()
return r.SubscribeAny(query, func(data sdk.EventData) {
handler(data.(sdk.EventDataNewBlockHeader))
})
}
func (r rpcClient) SubscribeValidatorSetUpdates(handler sdk.EventValidatorSetUpdatesHandler) (sdk.Subscription, sdk.Error) {
query := tmtypes.QueryForEvent(tmtypes.EventValidatorSetUpdates).String()
return r.SubscribeAny(query, func(data sdk.EventData) {
handler(data.(sdk.EventDataValidatorSetUpdates))
})
}
func (r rpcClient) Resubscribe(subscription sdk.Subscription, handler sdk.EventHandler) (err sdk.Error) {
_, err = r.SubscribeAny(subscription.Query, handler)
return
}
func (r rpcClient) Unsubscribe(subscription sdk.Subscription) sdk.Error {
r.Info("end to subscribe event", "query", subscription.Query, "subscriber", subscription.ID)
err := r.Client.Unsubscribe(subscription.Ctx, subscription.ID, subscription.Query)
if err != nil {
r.Error("unsubscribe failed", "query", subscription.Query, "subscriber", subscription.ID, "errMsg", err.Error())
return sdk.Wrap(err)
}
return nil
}
func (r rpcClient) SubscribeAny(query string, handler sdk.EventHandler) (subscription sdk.Subscription, err sdk.Error) {
ctx := context.Background()
subscriber := getSubscriber()
ch, e := r.Subscribe(ctx, subscriber, query, 0)
if e != nil {
return subscription, sdk.Wrap(e)
}
r.Info("subscribe event", "query", query, "subscriber", subscription.ID)
subscription = sdk.Subscription{
Ctx: ctx,
Query: query,
ID: subscriber,
}
go func() {
for {
data := <-ch
go func() {
defer sdk.CatchPanic(func(errMsg string) {
r.Error("unsubscribe failed", "query", subscription.Query, "subscriber", subscription.ID, "errMsg", err.Error())
})
switch data := data.Data.(type) {
case tmtypes.EventDataTx:
handler(r.parseTx(data))
return
case tmtypes.EventDataNewBlock:
handler(r.parseNewBlock(data))
return
case tmtypes.EventDataNewBlockHeader:
handler(r.parseNewBlockHeader(data))
return
case tmtypes.EventDataValidatorSetUpdates:
handler(r.parseValidatorSetUpdates(data))
return
default:
handler(data)
}
}()
}
}()
return
}
func (r rpcClient) parseTx(data sdk.EventData) sdk.EventDataTx {
dataTx := data.(tmtypes.EventDataTx)
tx, err := r.txDecoder(dataTx.Tx)
if err != nil {
return sdk.EventDataTx{}
}
hash := sdk.HexBytes(tmhash.Sum(dataTx.Tx)).String()
result := sdk.TxResult{
Code: dataTx.Result.Code,
Log: dataTx.Result.Log,
GasWanted: dataTx.Result.GasWanted,
GasUsed: dataTx.Result.GasUsed,
Events: sdk.StringifyEvents(dataTx.Result.Events),
}
return sdk.EventDataTx{
Hash: hash,
Height: dataTx.Height,
Index: dataTx.Index,
Tx: tx,
Result: result,
}
}
func (r rpcClient) parseNewBlock(data sdk.EventData) sdk.EventDataNewBlock {
block := data.(tmtypes.EventDataNewBlock)
return sdk.EventDataNewBlock{
Block: sdk.ParseBlock(r.cdc, block.Block),
ResultBeginBlock: sdk.ResultBeginBlock{
Events: sdk.StringifyEvents(block.ResultBeginBlock.Events),
},
ResultEndBlock: sdk.ResultEndBlock{
Events: sdk.StringifyEvents(block.ResultEndBlock.Events),
ValidatorUpdates: sdk.ParseValidatorUpdate(block.ResultEndBlock.ValidatorUpdates),
},
}
}
func (r rpcClient) parseValidatorSetUpdates(data sdk.EventData) sdk.EventDataValidatorSetUpdates {
validatorSet := data.(tmtypes.EventDataValidatorSetUpdates)
return sdk.EventDataValidatorSetUpdates{
ValidatorUpdates: sdk.ParseValidators(r.cdc, validatorSet.ValidatorUpdates),
}
}
func (r rpcClient) parseNewBlockHeader(data sdk.EventData) sdk.EventDataNewBlockHeader {
blockHeader := data.(tmtypes.EventDataNewBlockHeader)
return sdk.EventDataNewBlockHeader{
Header: blockHeader.Header,
ResultBeginBlock: sdk.ResultBeginBlock{
Events: sdk.StringifyEvents(blockHeader.ResultBeginBlock.Events),
},
ResultEndBlock: sdk.ResultEndBlock{
Events: sdk.StringifyEvents(blockHeader.ResultEndBlock.Events),
ValidatorUpdates: sdk.ParseValidatorUpdate(blockHeader.ResultEndBlock.ValidatorUpdates),
},
}
}
//获取订阅人 Chain
func getSubscriber() string {
subscriber := "plugchain-sdk-go"
id, err := uuid.NewV1()
if err == nil {
subscriber = fmt.Sprintf("%s-%s", subscriber, id.String())
}
return subscriber
}