tests: Use #[ink::error] in integration tests (#2679)

Author: davidsemakula

integration-tests/public/dns/lib.rs

@@ -82,7 +82,7 @@ mod dns {
 
     /// Errors that can occur upon calling this contract.
     #[derive(Debug, PartialEq, Eq)]
-    #[ink::scale_derive(Encode, Decode, TypeInfo)]
+    #[ink::error]
     pub enum Error {
         /// Returned if the name already exists upon registration.
         NameAlreadyExists,

integration-tests/public/erc1155/lib.rs

@@ -28,7 +28,7 @@ pub type TokenId = u128;
 
 // The ERC-1155 error types.
 #[derive(Debug, PartialEq, Eq)]
-#[ink::scale_derive(Encode, Decode, TypeInfo)]
+#[ink::error]
 pub enum Error {
     /// This token ID has not yet been created by the contract.
     UnexistentToken,

integration-tests/public/erc20/lib.rs

@@ -43,7 +43,7 @@ mod erc20 {
 
     /// The ERC-20 error types.
     #[derive(Debug, PartialEq, Eq)]
-    #[ink::scale_derive(Encode, Decode, TypeInfo)]
+    #[ink::error]
     pub enum Error {
         /// Returned if not enough balance to fulfill a request is available.
         InsufficientBalance,

integration-tests/public/erc721/lib.rs

@@ -73,7 +73,7 @@ mod erc721 {
     }
 
     #[derive(Debug, PartialEq, Eq, Copy, Clone)]
-    #[ink::scale_derive(Encode, Decode, TypeInfo)]
+    #[ink::error]
     pub enum Error {
         NotOwner,
         NotApproved,

integration-tests/public/multisig/lib.rs

@@ -137,7 +137,7 @@ mod multisig {
 
     /// Errors that can occur upon calling this contract.
     #[derive(Clone, Copy, Debug, PartialEq, Eq)]
-    #[ink::scale_derive(Encode, Decode, TypeInfo)]
+    #[ink::error]
     pub enum Error {
         /// Returned if the call failed.
         TransactionFailed,

integration-tests/public/payment-channel/lib.rs

@@ -65,7 +65,7 @@ mod payment_channel {
 
     /// Errors that can occur upon calling this contract.
     #[derive(Debug, PartialEq, Eq)]
-    #[ink::scale_derive(Encode, Decode, TypeInfo)]
+    #[ink::error]
     pub enum Error {
         /// Returned if caller is not the `sender` while required to.
         CallerIsNotSender,

integration-tests/public/trait-erc20/lib.rs

@@ -9,7 +9,7 @@ mod erc20 {
 
     /// The ERC-20 error types.
     #[derive(Debug, PartialEq, Eq)]
-    #[ink::scale_derive(Encode, Decode, TypeInfo)]
+    #[ink::error]
     pub enum Error {
         /// Returned if not enough balance to fulfill a request is available.
         InsufficientBalance,