feat: make address a graphql scalar

gqlgen.yml

@@ -43,17 +43,6 @@ autobind:
 # modelgen, the others will be allowed when binding to fields. Configure them to
 # your liking
 models:
-  ID:
-    model:
-      - github.com/99designs/gqlgen/graphql.ID
-      - github.com/99designs/gqlgen/graphql.Int
-      - github.com/99designs/gqlgen/graphql.Int64
-      - github.com/99designs/gqlgen/graphql.Int32
-  Int:
-    model:
-      - github.com/99designs/gqlgen/graphql.Int
-      - github.com/99designs/gqlgen/graphql.Int64
-      - github.com/99designs/gqlgen/graphql.Int32
   Address:
     model:
-      - github.com/99designs/gqlgen/graphql.String
+      - okp4/cosmos-faucet/pkg.Address

graph/schema.graphqls

@@ -2,8 +2,10 @@
 #
 # https://gqlgen.com/getting-started/
 
+scalar Address
+
 input SendInput {
-    toAddress: String!
+    toAddress: Address!
 }
 
 type Mutation {

pkg/scalar.go

@@ -0,0 +1,22 @@
+package pkg
+
+import (
+	"errors"
+	"io"
+
+	"github.com/99designs/gqlgen/graphql"
+)
+
+func MarshalAddress(a string) graphql.Marshaler {
+	return graphql.WriterFunc(func(w io.Writer) {
+		_, _ = w.Write([]byte(a))
+	})
+}
+
+func UnmarshalAddress(v interface{}) (string, error) {
+	value, ok := v.(string)
+	if !ok {
+		return "", errors.New("address must be a string")
+	}
+	return value, nil
+}