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Increase gRPC message size limits for peerswapd server and REST gateway #413

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Increase gRPC message size limits for peerswapd server and REST gateway #413

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b96e3c6
Increase gRPC message size limits for server and REST gateway
Copilot Dec 3, 2025
c771aa1
Merge pull request #1 from LN-Zap/copilot/increase-grpc-message-size-…
mrfelton Dec 9, 2025
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14 changes: 12 additions & 2 deletions cmd/peerswaplnd/peerswapd/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,10 @@ import (

const (
minLndVersion = float64(14.1)
// maxMsgRecvSize is the largest message our gRPC server and REST gateway
// will receive. This is set to 500 MiB to be consistent with other
// gRPC clients in this repo (e.g. lnd/connect.go, testframework/proxy.go).
maxMsgRecvSize = 1 * 1024 * 1024 * 500
)

var GitCommit string
Expand Down Expand Up @@ -443,7 +447,10 @@ func run() error {
}
defer lis.Close()

grpcSrv := grpc.NewServer()
grpcSrv := grpc.NewServer(
grpc.MaxRecvMsgSize(maxMsgRecvSize),
grpc.MaxSendMsgSize(maxMsgRecvSize),
)

peerswaprpc.RegisterPeerSwapServer(grpcSrv, peerswaprpcServer)

Expand All @@ -467,7 +474,10 @@ func run() error {
},
}),
)
opts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
opts := []grpc.DialOption{
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(maxMsgRecvSize)),
}
err := peerswaprpc.RegisterPeerSwapHandlerFromEndpoint(ctx, mux, cfg.Host, opts)
if err != nil {
return err
Expand Down
1 change: 0 additions & 1 deletion go.mod
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Expand Up @@ -164,7 +164,6 @@ require (
github.com/docker/go-units v0.5.0 // indirect
github.com/golang-jwt/jwt/v4 v4.4.2 // indirect
github.com/golang-migrate/migrate/v4 v4.17.0 // indirect
github.com/golang/mock v1.6.0 // indirect
github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/hashicorp/errwrap v1.1.0 // indirect
Expand Down
3 changes: 0 additions & 3 deletions go.sum
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Expand Up @@ -256,8 +256,6 @@ github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
github.com/golang/mock v1.6.0 h1:ErTB+efbowRARo13NNdxyJji2egdxLGQhRaY+DUumQc=
github.com/golang/mock v1.6.0/go.mod h1:p6yTPP+5HYm5mzsMV8JkE6ZKdX+/wYM6Hr+LicevLPs=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
Expand Down Expand Up @@ -951,7 +949,6 @@ golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc
golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d h1:vU5i/LfpvrRCpgM/VPfJLg5KjxD3E+hfT1SH+d9zLwg=
golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
Expand Down
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