fix: Backport #be42db3e46d240871350630012f63eb2f3c2cd7e

package.json

@@ -59,6 +59,7 @@
     "cosmjs-types": "^0.5.2",
     "did-jwt": "^6.11.6",
     "did-resolver": "^4.1.0",
+    "file-type": "^16.5.4",
     "multiformats": "^9.9.0",
     "uuid": "^9.0.0"
   },
@@ -77,7 +78,7 @@
     "ts-jest": "^29.1.0",
     "ts-node": "^10.9.1",
     "typescript": "^5.1.3",
-    "uint8arrays": "^4.0.3"
+    "uint8arrays": "^3.1.1"
   },
   "publishConfig": {
     "registry": "https://registry.npmjs.org/",

src/modules/resource.ts

@@ -29,10 +29,13 @@ import {
 	createPagination,
 	createProtobufRpcClient
 } from "@cosmjs/stargate"
+import { toString } from 'uint8arrays';
+import FileType from 'file-type/browser';
 import { SignInfo } from "@cheqd/ts-proto/cheqd/did/v2/index";
 import { assert } from '@cosmjs/utils';
 import { PageRequest } from '@cheqd/ts-proto/cosmos/base/query/v1beta1/pagination';
 import { CheqdQuerier } from '../querier';
+import { isJSON } from '../utils';
 
 export const defaultResourceExtensionKey = 'resource' as const
 
@@ -208,7 +211,8 @@ export class ResourceModule extends AbstractCheqdSDKModule {
 	}
 
 	static async readMimeType(content: Uint8Array): Promise<string> {
-		return 'application/octet-stream'
+		if (isJSON(toString(content, 'utf-8'))) return 'application/json'
+		return (await FileType.fromBuffer(content))?.mime ?? 'application/octet-stream'
 	}
 
 	static async generateCreateResourceImageFees(feePayer: string, granter?: string): Promise<DidStdFee> {

src/utils.ts

@@ -295,4 +295,14 @@ export function createMsgResourcePayloadToSign(payload: Partial<MsgCreateResourc
   return MsgCreateResourcePayload.encode(
     MsgCreateResourcePayload.fromPartial(payload)
   ).finish()
+}
+
+export function isJSON(input: any): boolean {
+    if (typeof input !== 'string') return false
+    try {
+        JSON.parse(input)
+        return true
+    } catch (e) {
+        return false
+    }
 }

tests/utils.test.ts

@@ -1,6 +1,7 @@
 import {
     TImportableEd25519Key,
-    createSignInputsFromImportableEd25519Key
+    createSignInputsFromImportableEd25519Key,
+    isJSON
 } from '../src/utils'
 import {
     createDidVerificationMethod,
@@ -74,4 +75,46 @@ describe('createSignInputsFromImportableEd25519Key', () => {
 
         expect(signInput).toEqual({ verificationMethodId: verificationKeys.keyId, privateKeyHex: importableEd25519Key.privateKeyHex })
     })
+
+    it('should return valid json', async () => {
+        // define invalid cases
+        const invalid = [
+            'invalid',
+            '{invalid: json}',
+            '{"invalid": "json"',
+            '"invalid": "json"}',
+            '{""}',
+            0,
+            1,
+            true,
+            null,
+            undefined,
+        ]
+
+        // define valid cases
+        const valid = [
+            '{"valid": "json"}',
+            '{"valid": "json", "with": "multiple", "keys": "and", "values": "of", "different": "types"}',
+            '{"valid": "json", "with": "multiple", "keys": "and", "values": "of", "different": "types", "and": {"nested": "objects"}}',
+            '{"valid": "json", "with": "multiple", "keys": "and", "values": "of", "different": "types", "and": {"nested": "objects", "and": {"even": {"more": {"nested": "objects"}}}}}',
+            '{"": ""}',
+            '{"boolean": true}',
+            '{"boolean": false}',
+            '{"number": 0}',
+            '{"nullish": null}',
+            '{"array": []}',
+            '{"array": [1, 2, 3]}',
+            '{"array": [1, 2, 3], "with": ["multiple", "arrays"]}',
+        ]
+
+        // check invalid cases
+        invalid.forEach((invalidCase) => {
+            expect(isJSON(invalidCase)).toBe(false)
+        })
+
+        // check valid cases
+        valid.forEach((validCase) => {
+            expect(isJSON(validCase)).toBe(true)
+        })
+    })
 })