feat: add unsubscription type

Author: wa0x6e

src/schemas/unsubscription.json

@@ -0,0 +1,23 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$ref": "#/definitions/Unsubscription",
+  "definitions": {
+    "Unsubscription": {
+      "title": "Unsubscription",
+      "type": "object",
+      "properties": {
+        "type": {
+          "type": "string",
+          "enum": ["email"]
+        },
+        "value": {
+          "type": "string",
+          "title": "value",
+          "maxLength": 256
+        }
+      },
+      "required": ["type", "value"],
+      "additionalProperties": false
+    }
+  }
+}

src/sign/hashedTypes.json

@@ -63,5 +63,6 @@
   "4288d50b713081aae77d60d596d75864bff7acf7791a00183401e58658ee9da5": "statement",
   "d56782e3b50ac86c25ae292923da8c367e3c9e8e7ea9d8baa435051fe2f430fa": "proposal",
   "df10a7eeabe19301d6018be8b6c5d13231320d7ece64d021043fa172b64f3796": "update-proposal",
-  "499ff7269df478dede66b3c0b96a0b90286c479b4013b423ac7cf8628a94e6db": "subscription"
+  "499ff7269df478dede66b3c0b96a0b90286c479b4013b423ac7cf8628a94e6db": "subscription",
+  "3c211382d04e80cbd21f3275e0674387bde366bbb885215e3735151763ca2813": "unsubscription"
 }

src/sign/types.ts

@@ -355,3 +355,12 @@ export const subscriptionTypes = {
     { name: 'timestamp', type: 'uint64' }
   ]
 };
+
+export const unsubscriptionTypes = {
+  Unsubscription: [
+    { name: 'from', type: 'address' },
+    { name: 'type', type: 'string' },
+    { name: 'value', type: 'string' },
+    { name: 'timestamp', type: 'uint64' }
+  ]
+};