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package proxy
import (
"context"
"net/http"
amino "github.com/tendermint/go-amino"
cmn "github.com/tendermint/tendermint/libs/common"
"github.com/tendermint/tendermint/libs/log"
"github.com/tendermint/tendermint/rpc/client"
rpcclient "github.com/tendermint/tendermint/rpc/client"
"github.com/tendermint/tendermint/rpc/core"
ctypes "github.com/tendermint/tendermint/rpc/core/types"
rpcserver "github.com/tendermint/tendermint/rpc/lib/server"
rpctypes "github.com/tendermint/tendermint/rpc/lib/types"
"github.com/tendermint/tendermint/types"
)
const (
wsEndpoint = "/websocket"
)
// StartProxy will start the websocket manager on the client,
// set up the rpc routes to proxy via the given client,
// and start up an http/rpc server on the location given by bind (eg. :1234)
// NOTE: This function blocks - you may want to call it in a go-routine.
func StartProxy(c rpcclient.Client, listenAddr string, logger log.Logger, maxOpenConnections int) error {
err := c.Start()
if err != nil {
return err
}
cdc := amino.NewCodec()
ctypes.RegisterAmino(cdc)
r := RPCRoutes(c)
// build the handler...
mux := http.NewServeMux()
rpcserver.RegisterRPCFuncs(mux, r, cdc, logger)
unsubscribeFromAllEvents := func(remoteAddr string) {
if err := c.UnsubscribeAll(context.Background(), remoteAddr); err != nil {
logger.Error("Failed to unsubscribe from events", "err", err)
}
}
wm := rpcserver.NewWebsocketManager(r, cdc, rpcserver.OnDisconnect(unsubscribeFromAllEvents))
wm.SetLogger(logger)
core.SetLogger(logger)
mux.HandleFunc(wsEndpoint, wm.WebsocketHandler)
config := rpcserver.DefaultConfig()
config.MaxOpenConnections = maxOpenConnections
l, err := rpcserver.Listen(listenAddr, config)
if err != nil {
return err
}
return rpcserver.StartHTTPServer(l, mux, logger, config)
}
// RPCRoutes just routes everything to the given client, as if it were
// a tendermint fullnode.
//
// if we want security, the client must implement it as a secure client
func RPCRoutes(c rpcclient.Client) map[string]*rpcserver.RPCFunc {
return map[string]*rpcserver.RPCFunc{
// Subscribe/unsubscribe are reserved for websocket events.
"subscribe": rpcserver.NewWSRPCFunc(c.(Wrapper).SubscribeWS, "query"),
"unsubscribe": rpcserver.NewWSRPCFunc(c.(Wrapper).UnsubscribeWS, "query"),
"unsubscribe_all": rpcserver.NewWSRPCFunc(c.(Wrapper).UnsubscribeAllWS, ""),
// info API
"status": rpcserver.NewRPCFunc(makeStatusFunc(c), ""),
"blockchain": rpcserver.NewRPCFunc(makeBlockchainInfoFunc(c), "minHeight,maxHeight"),
"genesis": rpcserver.NewRPCFunc(makeGenesisFunc(c), ""),
"block": rpcserver.NewRPCFunc(makeBlockFunc(c), "height"),
"commit": rpcserver.NewRPCFunc(makeCommitFunc(c), "height"),
"tx": rpcserver.NewRPCFunc(makeTxFunc(c), "hash,prove"),
"validators": rpcserver.NewRPCFunc(makeValidatorsFunc(c), "height"),
// broadcast API
"broadcast_tx_commit": rpcserver.NewRPCFunc(makeBroadcastTxCommitFunc(c), "tx"),
"broadcast_tx_sync": rpcserver.NewRPCFunc(makeBroadcastTxSyncFunc(c), "tx"),
"broadcast_tx_async": rpcserver.NewRPCFunc(makeBroadcastTxAsyncFunc(c), "tx"),
// abci API
"abci_query": rpcserver.NewRPCFunc(makeABCIQueryFunc(c), "path,data"),
"abci_info": rpcserver.NewRPCFunc(makeABCIInfoFunc(c), ""),
}
}
func makeStatusFunc(c client.StatusClient) func(ctx *rpctypes.Context) (*ctypes.ResultStatus, error) {
return func(ctx *rpctypes.Context) (*ctypes.ResultStatus, error) {
return c.Status()
}
}
func makeBlockchainInfoFunc(c rpcclient.Client) func(
ctx *rpctypes.Context,
minHeight,
maxHeight int64,
) (*ctypes.ResultBlockchainInfo, error) {
return func(ctx *rpctypes.Context, minHeight, maxHeight int64) (*ctypes.ResultBlockchainInfo, error) {
return c.BlockchainInfo(minHeight, maxHeight)
}
}
func makeGenesisFunc(c rpcclient.Client) func(ctx *rpctypes.Context) (*ctypes.ResultGenesis, error) {
return func(ctx *rpctypes.Context) (*ctypes.ResultGenesis, error) {
return c.Genesis()
}
}
func makeBlockFunc(c rpcclient.Client) func(ctx *rpctypes.Context, height *int64) (*ctypes.ResultBlock, error) {
return func(ctx *rpctypes.Context, height *int64) (*ctypes.ResultBlock, error) {
return c.Block(height)
}
}
func makeCommitFunc(c rpcclient.Client) func(ctx *rpctypes.Context, height *int64) (*ctypes.ResultCommit, error) {
return func(ctx *rpctypes.Context, height *int64) (*ctypes.ResultCommit, error) {
return c.Commit(height)
}
}
func makeTxFunc(c rpcclient.Client) func(ctx *rpctypes.Context, hash []byte, prove bool) (*ctypes.ResultTx, error) {
return func(ctx *rpctypes.Context, hash []byte, prove bool) (*ctypes.ResultTx, error) {
return c.Tx(hash, prove)
}
}
func makeValidatorsFunc(c rpcclient.Client) func(
ctx *rpctypes.Context,
height *int64,
) (*ctypes.ResultValidators, error) {
return func(ctx *rpctypes.Context, height *int64) (*ctypes.ResultValidators, error) {
return c.Validators(height, 0, 0)
}
}
func makeBroadcastTxCommitFunc(c rpcclient.Client) func(
ctx *rpctypes.Context,
tx types.Tx,
) (*ctypes.ResultBroadcastTxCommit, error) {
return func(ctx *rpctypes.Context, tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error) {
return c.BroadcastTxCommit(tx)
}
}
func makeBroadcastTxSyncFunc(c rpcclient.Client) func(
ctx *rpctypes.Context,
tx types.Tx,
) (*ctypes.ResultBroadcastTx, error) {
return func(ctx *rpctypes.Context, tx types.Tx) (*ctypes.ResultBroadcastTx, error) {
return c.BroadcastTxSync(tx)
}
}
func makeBroadcastTxAsyncFunc(c rpcclient.Client) func(
ctx *rpctypes.Context,
tx types.Tx,
) (*ctypes.ResultBroadcastTx, error) {
return func(ctx *rpctypes.Context, tx types.Tx) (*ctypes.ResultBroadcastTx, error) {
return c.BroadcastTxAsync(tx)
}
}
func makeABCIQueryFunc(c rpcclient.Client) func(
ctx *rpctypes.Context,
path string,
data cmn.HexBytes,
) (*ctypes.ResultABCIQuery, error) {
return func(ctx *rpctypes.Context, path string, data cmn.HexBytes) (*ctypes.ResultABCIQuery, error) {
return c.ABCIQuery(path, data)
}
}
func makeABCIInfoFunc(c rpcclient.Client) func(ctx *rpctypes.Context) (*ctypes.ResultABCIInfo, error) {
return func(ctx *rpctypes.Context) (*ctypes.ResultABCIInfo, error) {
return c.ABCIInfo()
}
}