Make unmarshal function associated

Author: aumetra

internal/api/lib.go

@@ -13,8 +13,6 @@ import (
 
 	"golang.org/x/sys/unix"
 
-	"github.com/vmihailenco/msgpack/v5"
-
 	"github.com/CosmWasm/wasmvm/v2/types"
 )
 
@@ -200,7 +198,7 @@ func GetPinnedMetrics(cache Cache) (*types.PinnedMetrics, error) {
 	}
 
 	var pinnedMetrics types.PinnedMetrics
-	if err := msgpack.Unmarshal(copyAndDestroyUnmanagedVector(metrics), &pinnedMetrics); err != nil {
+	if err := pinnedMetrics.UnmarshalMessagePack(copyAndDestroyUnmanagedVector(metrics)); err != nil {
 		return nil, err
 	}
 

types/types.go

@@ -4,6 +4,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"strconv"
+
+	"github.com/vmihailenco/msgpack/v5"
 )
 
 // Uint64 is a wrapper for uint64, but it is marshalled to and from JSON as a string
@@ -198,6 +200,10 @@ type PinnedMetrics struct {
 	PerModule PerModuleMetrics `json:"per_module"`
 }
 
+func (pm *PinnedMetrics) UnmarshalMessagePack(data []byte) error {
+	return msgpack.Unmarshal(data, pm)
+}
+
 // Array is a wrapper around a slice that ensures that we get "[]" JSON for nil values.
 // When unmarshaling, we get an empty slice for "[]" and "null".
 //