Validate ERC20 token support.(#11)

Author: dora4

lib/build.gradle.kts

@@ -78,7 +78,7 @@ afterEvaluate {
                 from(components["release"])
                 groupId = "com.github.dora4"
                 artifactId = "dora-walletconnect-support"
-                version = "2.1.19"
+                version = "2.1.20"
             }
         }
     }

lib/src/main/java/dora/pay/DoraFund.kt

@@ -112,6 +112,18 @@ object DoraFund {
      */
     private const val STATUS_CODE_ACCESS_KEY_IS_EXPIRED = -7
 
+    /**
+     * Unsupported ERC20 token.
+     * @since 2.1
+     */
+    private const val STATUS_CODE_UNSUPPORTED_ERC20_TOKEN = -8
+
+    /**
+     * ERC20 token symbol does not match the expected value during validation.
+     * @since 2.1
+     */
+    private const val STATUS_CODE_TOKEN_SYMBOL_MISMATCH = -9
+
     /**
      * VPN notification ID.
      * @since 2.0
@@ -867,6 +879,12 @@ object DoraFund {
                         STATUS_CODE_ACCESS_KEY_IS_EXPIRED -> {
                             Log.e("sendERC20TransactionRequest", "The access key is expired.")
                         }
+                        STATUS_CODE_UNSUPPORTED_ERC20_TOKEN -> {
+                            Log.e("sendERC20TransactionRequest", "Unsupported ERC20 token.")
+                        }
+                        STATUS_CODE_TOKEN_SYMBOL_MISMATCH -> {
+                            Log.e("sendERC20TransactionRequest", "ERC20 token symbol does not match.")
+                        }
                     }
                 }
             }