Don't assume anything is JSON anymore

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@stellar/wallet-sdk",
-  "version": "0.1.0-rc.3",
+  "version": "0.1.0-rc.4",
   "description": "Libraries to help you write Stellar-enabled wallets in Javascript",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/KeyManager.ts

@@ -381,8 +381,9 @@ export class KeyManager {
     });
 
     if (responseRes.status !== 200) {
+      const responseText = await responseRes.text();
       try {
-        const responseJson = await responseRes.json();
+        const responseJson = JSON.parse(responseText);
         throw new Error(
           `[KeyManager#fetchAuthToken] Failed to return a signed transaction,
           error: ${responseJson.error}`,
@@ -391,19 +392,27 @@ export class KeyManager {
         throw new Error(
           `[KeyManager#fetchAuthToken] Failed to return a signed transaction,
           error code ${responseRes.status} and status text
-          "${responseRes.statusText}"`,
+          "${responseText}"`,
         );
       }
     }
 
-    const { token, message, status } = await responseRes.json();
+    const responseResText = await responseRes.text();
 
-    // if we get a false status message, error out
-    if (status === false && message) {
-      throw new Error(message);
-    }
+    try {
+      const { token, message, status } = JSON.parse(responseResText);
+      // if we get a false status message, error out
+      if (status === false && message) {
+        throw new Error(message);
+      }
 
-    return token;
+      return token;
+    } catch (e) {
+      throw new Error(
+        `[KeyManager#fetchAuthToken] Failed to validate signed transaction 
+        response, server responded with ${responseResText}`,
+      );
+    }
   }
 
   /**

src/transfers/DepositProvider.ts

@@ -141,15 +141,16 @@ export class DepositProvider extends TransferProvider {
     }
 
     if (!response.ok) {
+      const responseText = await response.text();
       try {
-        const { error } = await response.json();
+        const { error } = JSON.parse(responseText);
         throw new Error(
           `Error starting deposit to ${this.transferServer}: error ${error}`,
         );
       } catch (e) {
         throw new Error(
           `Error starting deposit to ${this.transferServer}: error 
-          code ${response.status}, status text: "${response.statusText}"`,
+          code ${response.status}, status text: "${responseText}"`,
         );
       }
     }

src/transfers/WithdrawProvider.ts

@@ -134,15 +134,16 @@ export class WithdrawProvider extends TransferProvider {
     }
 
     if (!response.ok) {
+      const responseText = await response.text();
       try {
-        const { error } = await response.json();
+        const { error } = JSON.parse(responseText);
         throw new Error(
           `Error starting withdrawal to ${this.transferServer}: error ${error}`,
         );
       } catch (e) {
         throw new Error(
           `Error starting withdrawal to ${this.transferServer}: error 
-          code ${response.status}, status text: "${response.statusText}"`,
+          code ${response.status}, status text: "${responseText}"`,
         );
       }
     }