Add support for symbols containing unicode chars (#176)

* [#175] Add support for symbols containing unicode chars

* [#175] Adding support for empty symbols and names

* [#175] Add support for names containing unicode chars

Author: alexandrebini

src/tokenlist.schema.json

@@ -231,19 +231,33 @@
         "name": {
           "type": "string",
           "description": "The name of the token",
-          "minLength": 1,
+          "minLength": 0,
           "maxLength": 40,
-          "pattern": "^[ \\w.'+\\-%/À-ÖØ-öø-ÿ:&\\[\\]\\(\\)]+$",
+          "anyOf": [
+            {
+              "const": ""
+            },
+            {
+              "pattern": "^[ \\S+]+$"
+            }
+          ],
           "examples": [
             "USD Coin"
           ]
         },
         "symbol": {
           "type": "string",
-          "description": "The symbol for the token; must be alphanumeric",
-          "pattern": "^[a-zA-Z0-9+\\-%/$.]+$",
-          "minLength": 1,
+          "description": "The symbol for the token",
+          "minLength": 0,
           "maxLength": 20,
+          "anyOf": [
+            {
+              "const": ""
+            },
+            {
+              "pattern": "^\\S+$"
+            }
+          ],
           "examples": [
             "USDC"
           ]

test/__snapshots__/tokenlist.schema.test.ts.snap

@@ -579,6 +579,8 @@ exports[`schema token symbols may contain periods 1`] = `null`;
 
 exports[`schema works for big example schema 1`] = `null`;
 
+exports[`schema works for empty names and symbols 1`] = `null`;
+
 exports[`schema works for example schema 1`] = `null`;
 
 exports[`schema works for special characters schema 1`] = `null`;

test/schema/empty-name-symbol.tokenlist.json

@@ -0,0 +1,25 @@
+{
+  "name": "My Token List",
+  "timestamp": "2020-06-12T00:00:00+00:00",
+  "tokens": [
+    {
+      "chainId": 137,
+      "address": "0xc31C535F4d9A789df0c16D461B4F811543b72FEb",
+      "decimals": 0,
+      "name": "",
+      "symbol": ""
+    },
+    {
+      "chainId": 137,
+      "address": "0xF336f5624D34c3Be82eF3EFc4978bd2397B1524A",
+      "decimals": 0,
+      "name": "",
+      "symbol": ""
+    }
+  ],
+  "version": {
+    "major": 1,
+    "minor": 0,
+    "patch": 0
+  }
+}

test/schema/example-name-symbol-special-characters.tokenlist.json

@@ -43,6 +43,20 @@
       "decimals": 18,
       "name": "[brackets]&(parenthesis)",
       "symbol": "symbol"
+    },
+    {
+      "chainId": 1,
+      "address": "0x76ee13b775331eeae2bc5e3b67f4a44101b27a94",
+      "decimals": 18,
+      "name": "Amatsukami",
+      "symbol": "天津神"
+    },
+    {
+      "chainId": 137,
+      "address": "0x841120E51aD43EfE489244728532854A352073aD",
+      "decimals": 6,
+      "name": "Timeless ERC4626-Wrapped",
+      "symbol": "∞-waUSDC-xPYT"
     }
   ],
   "version": {

test/tokenlist.schema.test.ts

@@ -5,6 +5,7 @@ import exampleNameSymbolSpecialCharacters from './schema/example-name-symbol-spe
 import bigExampleList from './schema/bigexample.tokenlist.json';
 import exampleListMinimum from './schema/exampleminimum.tokenlist.json';
 import emptyList from './schema/empty.tokenlist.json';
+import emptyNameSymbol from './schema/empty-name-symbol.tokenlist.json';
 import bigWords from './schema/bigwords.tokenlist.json';
 import invalidTokenAddress from './schema/invalidtokenaddress.tokenlist.json';
 import invalidTimestamp from './schema/invalidtimestamp.tokenlist.json';
@@ -63,6 +64,10 @@ describe('schema', () => {
     checkSchema(emptyList, false);
   });
 
+  it('works for empty names and symbols', () => {
+    checkSchema(emptyNameSymbol, true);
+  });
+
   it('fails with big names', () => {
     checkSchema(bigWords, false);
   });