data.BlockHash can be nil, and this line blows up about arc HOT 3 CLOSED

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xf49998]

goroutine 608172 [running]:
github.com/bitcoin-sv/arc/metamorph.(*Server).GetTransaction(0x14977a8?, {0x14977a8?, 0xc00d451e00?}, 0x1d0afa0?)
        /home/gorillapool/arc/metamorph/server.go:497 +0x98
github.com/bitcoin-sv/arc/metamorph/metamorph_api._MetaMorphAPI_GetTransaction_Handler.func1({0x14977a8, 0xc00d451e00}, {0x10e2020?, 0xc00d600b00})
        /home/gorillapool/arc/metamorph/metamorph_api/metamorph_api_grpc.pb.go:205 +0x72
github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc.OpenTracingServerInterceptor.func1({0x14977a8, 0xc00d451d10}, {0x10e2020, 0xc00d600b00}, 0xc00f5d3000, 0xc00d617818)
        /home/gorillapool/go/pkg/mod/github.com/grpc-ecosystem/[email protected]/go/otgrpc/server.go:57 +0x3d0
google.golang.org/grpc.getChainUnaryHandler.func1({0x14977a8, 0xc00d451d10}, {0x10e2020, 0xc00d600b00})
        /home/gorillapool/go/pkg/mod/google.golang.org/[email protected]/server.go:1156 +0xb2
github.com/grpc-ecosystem/go-grpc-prometheus.init.(*ServerMetrics).UnaryServerInterceptor.func3({0x14977a8, 0xc00d451d10}, {0x10e2020, 0xc00d600b00}, 0xc00f5d3000?, 0xc00d600b40)
        /home/gorillapool/go/pkg/mod/github.com/grpc-ecosystem/[email protected]/server_metrics.go:107 +0x7d
google.golang.org/grpc.NewServer.chainUnaryServerInterceptors.chainUnaryInterceptors.func1({0x14977a8, 0xc00d451d10}, {0x10e2020, 0xc00d600b00}, 0xc00054ba50?, 0x1061a80?)
        /home/gorillapool/go/pkg/mod/google.golang.org/[email protected]/server.go:1147 +0x85
github.com/bitcoin-sv/arc/metamorph/metamorph_api._MetaMorphAPI_GetTransaction_Handler({0x1151e40?, 0xc000515c80}, {0x14977a8, 0xc00d451d10}, 0xc00d6623f0, 0xc000244880)
        /home/gorillapool/arc/metamorph/metamorph_api/metamorph_api_grpc.pb.go:207 +0x135
google.golang.org/grpc.(*Server).processUnaryRPC(0xc0003663c0, {0x149e080, 0xc00dfb11e0}, 0xc00bbf30e0, 0xc00071c5a0, 0x1cc64a8, 0x0)
        /home/gorillapool/go/pkg/mod/google.golang.org/[email protected]/server.go:1337 +0xde7
google.golang.org/grpc.(*Server).handleStream(0xc0003663c0, {0x149e080, 0xc00dfb11e0}, 0xc00bbf30e0, 0x0)
        /home/gorillapool/go/pkg/mod/google.golang.org/[email protected]/server.go:1714 +0x9e7
google.golang.org/grpc.(*Server).serveStreams.func1.1()
        /home/gorillapool/go/pkg/mod/google.golang.org/[email protected]/server.go:959 +0x8d
created by google.golang.org/grpc.(*Server).serveStreams.func1 in goroutine 601285
        /home/gorillapool/go/pkg/mod/google.golang.org/[email protected]/server.go:957 +0x165