Merge pull request #4609 from onflow/petera/4596-increase-max-grpc-ms…

…g-size

[Access] Update default grpc max message size to 1GiB

utils/grpcutils/grpc.go

@@ -13,9 +13,10 @@ import (
 	"github.com/onflow/flow-go/network/p2p/keyutils"
 )
 
-// DefaultMaxMsgSize use 20MB as the default message size limit.
-// grpc library default is 4MB
-const DefaultMaxMsgSize = 1024 * 1024 * 20
+// DefaultMaxMsgSize use 1 GiB as the default message size limit.
+// This enforces a sane max message size, while still allowing for reasonably large messages.
+// grpc library default is 4 MiB.
+const DefaultMaxMsgSize = 1 << (10 * 3) // 1 GiB
 
 // CertificateConfig is used to configure an Certificate
 type CertificateConfig struct {