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server.go
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server.go
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package grpc
import (
"fmt"
"net"
"time"
"google.golang.org/grpc"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/server/config"
"github.com/cosmos/cosmos-sdk/server/grpc/gogoreflection"
reflection "github.com/cosmos/cosmos-sdk/server/grpc/reflection/v2alpha1"
"github.com/cosmos/cosmos-sdk/server/types"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// StartGRPCServer starts a gRPC server on the given address.
func StartGRPCServer(clientCtx client.Context, app types.Application, cfg config.GRPCConfig) (*grpc.Server, error) {
maxSendMsgSize := cfg.MaxSendMsgSize
if maxSendMsgSize == 0 {
maxSendMsgSize = config.DefaultGRPCMaxSendMsgSize
}
maxRecvMsgSize := cfg.MaxRecvMsgSize
if maxRecvMsgSize == 0 {
maxRecvMsgSize = config.DefaultGRPCMaxRecvMsgSize
}
grpcSrv := grpc.NewServer(
grpc.MaxSendMsgSize(maxSendMsgSize),
grpc.MaxRecvMsgSize(maxRecvMsgSize),
)
app.RegisterGRPCServer(grpcSrv)
// Reflection allows consumers to build dynamic clients that can write to any
// Cosmos SDK application without relying on application packages at compile
// time.
err := reflection.Register(grpcSrv, reflection.Config{
SigningModes: func() map[string]int32 {
modes := make(map[string]int32, len(clientCtx.TxConfig.SignModeHandler().Modes()))
for _, m := range clientCtx.TxConfig.SignModeHandler().Modes() {
modes[m.String()] = (int32)(m)
}
return modes
}(),
ChainID: clientCtx.ChainID,
SdkConfig: sdk.GetConfig(),
InterfaceRegistry: clientCtx.InterfaceRegistry,
})
if err != nil {
return nil, err
}
// Reflection allows external clients to see what services and methods
// the gRPC server exposes.
gogoreflection.Register(grpcSrv)
listener, err := net.Listen("tcp", cfg.Address)
if err != nil {
return nil, err
}
errCh := make(chan error)
go func() {
err = grpcSrv.Serve(listener)
if err != nil {
errCh <- fmt.Errorf("failed to serve: %w", err)
}
}()
select {
case err := <-errCh:
return nil, err
case <-time.After(types.ServerStartTime):
// assume server started successfully
return grpcSrv, nil
}
}