addressed some reviews

go.mod

@@ -27,6 +27,7 @@ require (
 	github.com/ipfs/go-ds-badger2 v0.1.1
 	github.com/ipfs/go-ipns v0.1.2 //indirect
 	github.com/jpillora/ipfilter v1.2.3
+	github.com/klauspost/compress v1.12.3
 	github.com/libp2p/go-libp2p v0.15.1
 	github.com/libp2p/go-libp2p-core v0.9.0
 	github.com/libp2p/go-libp2p-discovery v0.5.1
@@ -84,7 +85,6 @@ require (
 	github.com/jbenet/goprocess v0.1.4 // indirect
 	github.com/jcelliott/lumber v0.0.0-20160324203708-dd349441af25 // indirect
 	github.com/jpillora/backoff v1.0.0 // indirect
-	github.com/klauspost/compress v1.12.3 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
 	github.com/koron/go-ssdp v0.0.2 // indirect
 	github.com/leodido/go-urn v1.2.1 // indirect

lib/runtime/wasmer/instance.go

@@ -26,15 +26,17 @@ import (
 // Name represents the name of the interpreter
 const Name = "wasmer"
 
-// Check that runtime interfaces are satisfied
 var (
+	// Check that runtime interfaces are satisfied
 	_ runtime.Instance = (*Instance)(nil)
 	_ runtime.Memory   = (*wasm.Memory)(nil)
 
 	logger = log.NewFromGlobal(
 		log.AddContext("pkg", "runtime"),
 		log.AddContext("module", "go-wasmer"),
 	)
+
+	substrateWasmCompressionFlag = []byte{82, 188, 83, 118, 70, 219, 142, 5}
 )
 
 // Config represents a wasmer configuration
@@ -99,15 +101,13 @@ func NewInstance(code []byte, cfg *Config) (*Instance, error) {
 
 	// Substrate Wasm compression
 	// https://github.com/paritytech/substrate/blob/master/primitives/maybe-compressed-blob/src/lib.rs
-	const compressionFlag = []byte{82, 188, 83, 118, 70, 219, 142, 5}
-	if bytes.HasPrefix(code, compressionFlag) {
-		logger.Debug("Decompressing Wasm runtime code")
+	if bytes.HasPrefix(code, substrateWasmCompressionFlag) {
 		decoder, err := zstd.NewReader(nil)
 		if err != nil {
 			return nil, fmt.Errorf("failed to create zstd decoder: %w", err)
 		}
 
-		code, err = decoder.DecodeAll(code[len(compressionFlag):], nil)
+		code, err = decoder.DecodeAll(code[len(substrateWasmCompressionFlag):], nil)
 		if err != nil {
 			return nil, fmt.Errorf("failed to decompress compressed wasm code: %w", err)
 		}