fix: normalize RPC request parameters

.changeset/orange-mirrors-collect.md

@@ -0,0 +1,5 @@
+---
+"@coinbase-platform/onchain": patch
+---
+
+fix: normalize RPC parameters

packages/onchain/package.json

@@ -20,10 +20,7 @@
   "publishConfig": {
     "access": "public"
   },
-  "keywords": [
-    "coinbase",
-    "coinbase platform"
-  ],
+  "keywords": ["coinbase", "coinbase platform"],
   "scripts": {
     "build": "pnpm clean && tsup",
     "clean": "rimraf ./dist",
@@ -46,10 +43,7 @@
     },
     "./package.json": "./package.json"
   },
-  "files": [
-    "src",
-    "dist"
-  ],
+  "files": ["src", "dist"],
   "engine": {
     "node": "^18.0.0 || >=20.0.0"
   }

packages/onchain/src/rpc.ts

@@ -55,7 +55,7 @@ export function createRpcClient({
           jsonrpc: "2.0",
           id: 1,
           method: config.method,
-          params: config.parameters,
+          params: normalize(config.parameters),
         }),
       });
     },
@@ -178,3 +178,39 @@ export type RpcBalanceHistory = {
   blockHash: string;
   value: number;
 };
+
+/**
+ * Transforms addresses into lowercase.
+ *
+ * Reference: `https://docs.cdp.coinbase.com/onchain-data/docs/onchain-data-api/#parameters`
+ */
+function normalize(
+  parameters: RpcRequestConfig["parameters"],
+): RpcRequestConfig["parameters"] {
+  for (const element of parameters) {
+    element.address = element.address.toLowerCase();
+  }
+  return parameters;
+}
+
+if (import.meta.vitest) {
+  const { test, expect } = import.meta.vitest;
+
+  test("should transform addresses into lowercase", () => {
+    const parameters: RpcRequestConfig["parameters"] = [
+      {
+        address: "0x9C5940dFbd4633A67C60CfDC8B81E1d1916b4a08",
+        pageSize: 1,
+        pageToken: "page-token",
+      },
+    ];
+    const normalized = normalize(parameters);
+    for (let i = 0; i < parameters.length; i++) {
+      expect(normalized[i]).toStrictEqual({
+        address: parameters[i].address.toLowerCase(),
+        pageSize: parameters[i].pageSize,
+        pageToken: parameters[i].pageToken,
+      });
+    }
+  });
+}

packages/onchain/tsconfig.json

@@ -21,6 +21,8 @@
     // Some stricter flags (disabled by default)
     "noUnusedLocals": true,
     "noUnusedParameters": true,
-    "noPropertyAccessFromIndexSignature": false
+    "noPropertyAccessFromIndexSignature": false,
+
+    "types": ["vitest/importMeta"]
   }
 }

packages/onchain/vitest.config.ts

@@ -5,5 +5,9 @@ export default defineConfig({
     root: __dirname,
     environment: "node",
     setupFiles: ["./vitest.setup.ts"],
+    includeSource: ["src/**/*.ts"],
+  },
+  define: {
+    "import.meta.vitest": "undefined",
   },
 });