Decimal Parser in trpc

FernandoNarvaez1904 · Nov 20, 2023 · 623ddd7 · 623ddd7
1 parent 7732824
commit 623ddd7
Show file tree

Hide file tree

Showing 4 changed files with 19 additions and 4 deletions.
diff --git a/apps/expo/package.json b/apps/expo/package.json
@@ -20,6 +20,7 @@
     "@trpc/client": "^10.1.0",
     "@trpc/react-query": "^10.1.0",
     "@trpc/server": "^10.1.0",
+    "decimal.js": "^10.4.3",
     "expo": "^48.0.6",
     "expo-auth-session": "^4.0.3",
     "expo-random": "^13.0.0",

diff --git a/packages/api/src/trpc.ts b/packages/api/src/trpc.ts
@@ -1,9 +1,9 @@
 import { initTRPC, TRPCError } from "@trpc/server";
 import { type Context } from "./context";
-import superjson from "superjson";
+import { transformer } from "../transformer";
 
 const t = initTRPC.context<Context>().create({
-  transformer: superjson,
+  transformer: transformer,
   errorFormatter({ shape }) {
     return shape;
   },

diff --git a/packages/api/transformer.ts b/packages/api/transformer.ts
@@ -1,2 +1,13 @@
-import superjson from "superjson";
-export const transformer = superjson;
+import { Decimal } from "decimal.js";
+import SuperJSON from "superjson";
+
+SuperJSON.registerCustom<Decimal, string>(
+  {
+    isApplicable: (v): v is Decimal => Decimal.isDecimal(v),
+    serialize: (v) => v.toJSON(),
+    deserialize: (v) => new Decimal(v),
+  },
+  "decimal.js",
+);
+
+export const transformer = SuperJSON;
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml