For MessagePack Add github.com/tinylib/msgp

.gitignore

@@ -4,6 +4,7 @@
 # IntelliJ
 .idea/
 *.iml
+*.sum
 
 # VS code
 *.code-workspace

decimal_gen.go

@@ -0,0 +1,35 @@
+package decimal
+
+// Code generated by github.com/tinylib/msgp DO NOT EDIT.
+
+import (
+	"github.com/tinylib/msgp/msgp"
+)
+
+// MarshalMsg implements msgp.Marshaler
+func (z Decimal) MarshalMsg(b []byte) (o []byte, err error) {
+	o = msgp.Require(b, z.Msgsize())
+	o = msgp.AppendFloat64(o, z.InexactFloat64())
+	return
+}
+
+// UnmarshalMsg implements msgp.Unmarshaler
+func (z *Decimal) UnmarshalMsg(bts []byte) (o []byte, err error) {
+	{
+		var zb0001 float64
+		zb0001, bts, err = msgp.ReadFloat64Bytes(bts)
+		if err != nil {
+			err = msgp.WrapError(err)
+			return
+		}
+		(*z) = NewFromFloat(zb0001)
+	}
+	o = bts
+	return
+}
+
+// Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
+func (z Decimal) Msgsize() (s int) {
+	s = msgp.Float64Size
+	return
+}

go.mod

@@ -1,3 +1,5 @@
 module github.com/shopspring/decimal
 
 go 1.13
+
+require github.com/tinylib/msgp v1.1.6