MixinNetwork · wuyuehyang · Sep 23, 2025
diff --git a/Mixin/Resources/en.lproj/Localizable.strings b/Mixin/Resources/en.lproj/Localizable.strings
@@ -720,6 +720,7 @@
 "insufficient_balance" = "Insufficient balance";
 "insufficient_balance_symbol" = "Insufficient %@";
 "insufficient_fee_description" = "You need %1$@ on the %2$@ network to cover the network fee";
+"insufficient_sol_for_sending_spl_token" = "Insufficient SOL balance. Reserve at least %@ SOL.";
 "insufficient_transaction_fee" = "Insufficient transaction fee";
 "interface_style" = "Interface Style";
 "invalid_address" = "Invalid Address";
@@ -1176,6 +1177,7 @@
 "request_rejected_reason_another_request_in_process" = "Another request is in process, please retry after current request is finished";
 "resend_code" = "Resend code";
 "resend_code_pending" = "Resend code in %@";
+"reserve_sol_for_rent" = "Reserve at least %@ SOL for the rent";
 "reset" = "Reset";
 "reset_link" = "Reset Link";
 "restore" = "Restore";

diff --git a/Mixin/Resources/es.lproj/Localizable.strings b/Mixin/Resources/es.lproj/Localizable.strings
@@ -720,6 +720,7 @@
 "insufficient_balance" = "Insufficient balance";
 "insufficient_balance_symbol" = "Insufficient %@";
 "insufficient_fee_description" = "You need %1$@ on the %2$@ network to cover the network fee";
+"insufficient_sol_for_sending_spl_token" = "Insufficient SOL balance. Reserve at least %@ SOL.";
 "insufficient_transaction_fee" = "Tarifa de transacción insuficiente";
 "interface_style" = "Estilo de interfaz";
 "invalid_address" = "Invalid Address";
@@ -1176,6 +1177,7 @@
 "request_rejected_reason_another_request_in_process" = "Another request is in process, please retry after current request is finished";
 "resend_code" = "Reenviar codigo";
 "resend_code_pending" = "Reenviar código en %@";
+"reserve_sol_for_rent" = "Reserve at least %@ SOL for the rent";
 "reset" = "Reiniciar";
 "reset_link" = "Restablecer enlace";
 "restore" = "Restaurar";

diff --git a/Mixin/Resources/ja.lproj/Localizable.strings b/Mixin/Resources/ja.lproj/Localizable.strings
@@ -720,6 +720,7 @@
 "insufficient_balance" = "残高が不足しています";
 "insufficient_balance_symbol" = "Insufficient %@";
 "insufficient_fee_description" = "You need %1$@ on the %2$@ network to cover the network fee";
+"insufficient_sol_for_sending_spl_token" = "Insufficient SOL balance. Reserve at least %@ SOL.";
 "insufficient_transaction_fee" = "取引手数料が不足しています";
 "interface_style" = "外観モード";
 "invalid_address" = "Invalid Address";
@@ -1176,6 +1177,7 @@
 "request_rejected_reason_another_request_in_process" = "Another request is in process, please retry after current request is finished";
 "resend_code" = "コードを再送する";
 "resend_code_pending" = "%@ 後にコードを再送";
+"reserve_sol_for_rent" = "Reserve at least %@ SOL for the rent";
 "reset" = "リセット";
 "reset_link" = "リンクを取り消す";
 "restore" = "復元";

diff --git a/Mixin/Resources/ru.lproj/Localizable.strings b/Mixin/Resources/ru.lproj/Localizable.strings
@@ -720,6 +720,7 @@
 "insufficient_balance" = "Insufficient balance";
 "insufficient_balance_symbol" = "Insufficient %@";
 "insufficient_fee_description" = "You need %1$@ on the %2$@ network to cover the network fee";
+"insufficient_sol_for_sending_spl_token" = "Insufficient SOL balance. Reserve at least %@ SOL.";
 "insufficient_transaction_fee" = "Недостаточная комиссия за транзакцию";
 "interface_style" = "Стиль интерфейса";
 "invalid_address" = "Invalid Address";
@@ -1176,6 +1177,7 @@
 "request_rejected_reason_another_request_in_process" = "Another request is in process, please retry after current request is finished";
 "resend_code" = "Отправить код еще раз";
 "resend_code_pending" = "Повторно отправить код в %@";
+"reserve_sol_for_rent" = "Reserve at least %@ SOL for the rent";
 "reset" = "Перезагрузить";
 "reset_link" = "Сбросить ссылку";
 "restore" = "Восстановить";

diff --git a/Mixin/Resources/zh-Hans.lproj/Localizable.strings b/Mixin/Resources/zh-Hans.lproj/Localizable.strings
@@ -720,6 +720,7 @@
 "insufficient_balance" = "余额不足";
 "insufficient_balance_symbol" = "%@ 余额不足";
 "insufficient_fee_description" = "需要 %1$@ 以支付 %2$@ 网络费用";
+"insufficient_sol_for_sending_spl_token" = "SOL 余额不足，请至少预留 %@ SOL。";
 "insufficient_transaction_fee" = "手续费不足";
 "interface_style" = "外观";
 "invalid_address" = "无效的地址";
@@ -1176,6 +1177,7 @@
 "request_rejected_reason_another_request_in_process" = "正在处理另一请求，请完成当前请求后重试";
 "resend_code" = "重发验证码";
 "resend_code_pending" = "%@ 后重新发送验证码";
+"reserve_sol_for_rent" = "请预留至少 %@ SOL 以支付租金";
 "reset" = "重置";
 "reset_link" = "重置邀请链接";
 "restore" = "恢复";
@@ -1273,7 +1275,7 @@
 "send_message" = "发消息";
 "send_photo" = "发送 1 张图片";
 "send_photo_count" = "发送 %d 张图片";
-"send_sol_for_rent" = "发送至少 %@ SOL 以支付租金";
+"send_sol_for_rent" = "请发送至少 %@ SOL 以支付租金";
 "send_this_location" = "发送这个位置";
 "send_to" = "发送给 %@";
 "send_to_address_description" = "转到我地址薄中的地址，地址受到 PIN 保护，避免地址钓鱼攻击。";

diff --git a/Mixin/Resources/zh-Hant.lproj/Localizable.strings b/Mixin/Resources/zh-Hant.lproj/Localizable.strings
@@ -720,6 +720,7 @@
 "insufficient_balance" = "餘額不足";
 "insufficient_balance_symbol" = "%@ 餘額不足";
 "insufficient_fee_description" = "需要 %1$@ 以支付 %2$@ 網路費用";
+"insufficient_sol_for_sending_spl_token" = "SOL 餘額不足，請至少預留 %@ SOL。";
 "insufficient_transaction_fee" = "手續費不足";
 "interface_style" = "外觀";
 "invalid_address" = "無效的地址";
@@ -1176,6 +1177,7 @@
 "request_rejected_reason_another_request_in_process" = "正在處理另一請求，請完成當前請求後重試";
 "resend_code" = "重發驗證碼";
 "resend_code_pending" = "%@ 後重新發送驗證碼";
+"reserve_sol_for_rent" = "請預留至少 %@ SOL 以支付租金";
 "reset" = "重置";
 "reset_link" = "重置邀請連結";
 "restore" = "恢復";
@@ -1273,7 +1275,7 @@
 "send_message" = "發訊息";
 "send_photo" = "傳送 1 張圖片";
 "send_photo_count" = "傳送 %d 張圖片";
-"send_sol_for_rent" = "傳送至少 %@ SOL 以支付租金";
+"send_sol_for_rent" = "請傳送至少 %@ SOL 以支付租金";
 "send_this_location" = "傳送這個位置";
 "send_to" = "傳送給 %@";
 "send_to_address_description" = "轉到我地址薄中的地址，地址受到 PIN 保護，避免地址釣魚攻擊。";

diff --git a/Mixin/Service/API/Model/SwapToken.swift b/Mixin/Service/API/Model/SwapToken.swift
@@ -74,14 +74,6 @@ extension SwapToken {
         }
     }
 
-    func isEqual(to token: Web3Token) -> Bool {
-        if address == Web3Token.AssetKey.wrappedSOL && token.assetKey == Web3Token.AssetKey.sol {
-            true
-        } else {
-            address == token.assetKey
-        }
-    }
-
     func decimalAmount(nativeAmount: Decimal) -> NSDecimalNumber? {
         let nativeAmountNumber = nativeAmount as NSDecimalNumber
         return nativeAmountNumber.multiplying(byPowerOf10: -decimals)

diff --git a/Mixin/Service/Web3/SolanaTransferOperation.swift b/Mixin/Service/Web3/SolanaTransferOperation.swift
@@ -236,6 +236,9 @@ final class SolanaTransferWithCustomRespondingOperation: ArbitraryTransactionSol
 
 final class SolanaTransferToAddressOperation: SolanaTransferOperation {
 
+    @MainActor
+    private(set) var receiverAccountExists: Bool?
+
     private let payment: Web3SendingTokenToAddressPayment
     private let decimalAmount: Decimal
     private let amount: UInt64
@@ -268,17 +271,24 @@ final class SolanaTransferToAddressOperation: SolanaTransferOperation {
 
     override func loadFee() async throws -> DisplayFee {
         let tokenProgramID = try await RouteAPI.solanaGetAccountInfo(pubkey: payment.token.assetKey).owner
-        let ata = try Solana.tokenAssociatedAccount(
-            walletAddress: payment.toAddress,
-            mint: payment.token.assetKey,
-            tokenProgramID: tokenProgramID
-        )
-        let receiverAccountExists = try await RouteAPI.solanaAccountExists(pubkey: ata)
-        let createAccount = !receiverAccountExists
+        let receiverAccountExists: Bool
+        let createAssociatedTokenAccountForReceiver: Bool
+        if payment.sendingNativeToken {
+            receiverAccountExists = try await RouteAPI.solanaAccountExists(pubkey: payment.toAddress)
+            createAssociatedTokenAccountForReceiver = false
+        } else {
+            let ata = try Solana.tokenAssociatedAccount(
+                walletAddress: payment.toAddress,
+                mint: payment.token.assetKey,
+                tokenProgramID: tokenProgramID
+            )
+            receiverAccountExists = try await RouteAPI.solanaAccountExists(pubkey: ata)
+            createAssociatedTokenAccountForReceiver = !receiverAccountExists
+        }
         let transaction = try Solana.Transaction(
             from: payment.fromAddress.destination,
             to: payment.toAddress,
-            createAssociatedTokenAccountForReceiver: createAccount,
+            createAssociatedTokenAccountForReceiver: createAssociatedTokenAccountForReceiver,
             tokenProgramID: tokenProgramID,
             mint: payment.token.assetKey,
             amount: amount,
@@ -295,7 +305,8 @@ final class SolanaTransferToAddressOperation: SolanaTransferOperation {
         let fee = DisplayFee(tokenAmount: tokenAmount, fiatMoneyAmount: fiatMoneyAmount)
 
         await MainActor.run {
-            self.createAssociatedTokenAccountForReceiver = createAccount
+            self.receiverAccountExists = receiverAccountExists
+            self.createAssociatedTokenAccountForReceiver = createAssociatedTokenAccountForReceiver
             self.tokenProgramID = tokenProgramID
             self.priorityFee = priorityFee
             self.fee = fee

diff --git a/Mixin/UserInterface/Controllers/Wallet/Models/Web3AddressValidator.swift b/Mixin/UserInterface/Controllers/Wallet/Models/Web3AddressValidator.swift
@@ -7,7 +7,7 @@ enum Web3AddressValidator {
     enum Web3TransferValidationResult {
         case address(address: String, label: AddressLabel?)
         case insufficientBalance(transferring: BalanceRequirement, fee: BalanceRequirement)
-        case solAmountTooSmall
+        case rentExemptionFailed(Solana.RentExemptionFailedReason)
         case transfer(operation: Web3TransferOperation, toAddressLabel: AddressLabel?)
     }
 
@@ -84,15 +84,6 @@ enum Web3AddressValidator {
                         assetID: token.assetID,
                         destination: link.destination
                     )
-                    if chain.kind == .solana && payment.sendingNativeToken {
-                        let accountExists = try await RouteAPI.solanaAccountExists(pubkey: address)
-                        if !accountExists && amount < Solana.accountCreationCost {
-                            await MainActor.run {
-                                onSuccess(.solAmountTooSmall)
-                            }
-                            return
-                        }
-                    }
                     let addressPayment = Web3SendingTokenToAddressPayment(
                         payment: payment,
                         toAddress: address,
@@ -112,6 +103,30 @@ enum Web3AddressValidator {
                         )
                     }
                     let fee = try await operation.loadFee()
+                    if let operation = operation as? SolanaTransferToAddressOperation,
+                       let accountExists = await operation.receiverAccountExists
+                    {
+                        let reason = if payment.sendingNativeToken {
+                            Solana.checkRentExemptionForSOLTransfer(
+                                sendingAmount: amount,
+                                feeAmount: fee.tokenAmount,
+                                senderSOLBalance: payment.token.decimalBalance,
+                                receiverAccountExists: accountExists
+                            )
+                        } else {
+                            Solana.checkRentExemptionForSPLTokenTransfer(
+                                senderSOLBalance: operation.feeToken.decimalBalance,
+                                feeAmount: fee.tokenAmount,
+                                receiverAccountExists: accountExists
+                            )
+                        }
+                        if let reason {
+                            await MainActor.run {
+                                onSuccess(.rentExemptionFailed(reason))
+                            }
+                            return
+                        }
+                    }
                     let transferRequirement = BalanceRequirement(token: token, amount: amount)
                     let feeRequirement = BalanceRequirement(token: operation.feeToken, amount: fee.tokenAmount)
                     let requirements = transferRequirement.merging(with: feeRequirement)

diff --git a/Mixin/UserInterface/Controllers/Web3/Model/Solana.swift b/Mixin/UserInterface/Controllers/Web3/Model/Solana.swift
@@ -19,7 +19,6 @@ enum Solana {
 
     static let lamportsPerSOL = Decimal(SOLANA_LAMPORTS_PER_SOL)
     static let microLamportsPerLamport: Decimal = 1_000_000
-    static let accountCreationCost: Decimal = 0.002_039_28
     static let keyPairCount = 64
 
     static func publicKey(seed: Data) throws -> String {
@@ -172,8 +171,7 @@ extension Solana {
             priorityFee: PriorityFee?,
             token: Web3Token
         ) throws {
-            let isSendingSOL = token.chainID == ChainID.solana
-                && (token.assetKey == Web3Token.AssetKey.sol || token.assetKey == Web3Token.AssetKey.wrappedSOL)
+            let isSendingSOL = token.chainID == ChainID.solana && token.assetKey == Web3Token.AssetKey.sol
             let solanaPriorityFee: SolanaPriorityFee? = if let fee = priorityFee {
                 SolanaPriorityFee(price: fee.unitPrice, limit: fee.unitLimit)
             } else {
@@ -261,3 +259,77 @@ extension Solana {
     }
 
 }
+
+extension Solana {
+
+    enum RentExemptionFailedReason {
+
+        case reserveSOLForRent(Decimal)
+        case sendSOLForRent(Decimal)
+        case insufficientSOL(requiredAmount: Decimal)
+
+        var localizedDescription: String {
+            switch self {
+            case .reserveSOLForRent(let amount):
+                R.string.localizable.reserve_sol_for_rent(
+                    CurrencyFormatter.localizedString(
+                        from: amount,
+                        format: .precision,
+                        sign: .never
+                    )
+                )
+            case .sendSOLForRent(let amount):
+                R.string.localizable.send_sol_for_rent(
+                    CurrencyFormatter.localizedString(
+                        from: amount,
+                        format: .precision,
+                        sign: .never
+                    )
+                )
+            case .insufficientSOL(let requiredAmount):
+                R.string.localizable.insufficient_sol_for_sending_spl_token(
+                    CurrencyFormatter.localizedString(
+                        from: requiredAmount,
+                        format: .precision,
+                        sign: .never
+                    )
+                )
+            }
+        }
+
+    }
+
+    enum RentExemptionValue {
+        static let systemAccount: Decimal = 0.00089088
+        static let tokenAccount: Decimal = 0.00203928
+    }
+
+    static func checkRentExemptionForSOLTransfer(
+        sendingAmount: Decimal,
+        feeAmount: Decimal,
+        senderSOLBalance: Decimal,
+        receiverAccountExists: Bool
+    ) -> RentExemptionFailedReason? {
+        if senderSOLBalance - sendingAmount - feeAmount < RentExemptionValue.systemAccount {
+            .reserveSOLForRent(RentExemptionValue.systemAccount)
+        } else if !receiverAccountExists && sendingAmount < RentExemptionValue.tokenAccount {
+            .sendSOLForRent(RentExemptionValue.tokenAccount)
+        } else {
+            nil
+        }
+    }
+
+    static func checkRentExemptionForSPLTokenTransfer(
+        senderSOLBalance: Decimal,
+        feeAmount: Decimal,
+        receiverAccountExists: Bool
+    ) -> RentExemptionFailedReason? {
+        let minBalance = RentExemptionValue.systemAccount + RentExemptionValue.tokenAccount + feeAmount
+        if receiverAccountExists || senderSOLBalance >= minBalance {
+            return nil
+        } else {
+            return .insufficientSOL(requiredAmount: minBalance)
+        }
+    }
+
+}
diff --git a/Mixin/UserInterface/Controllers/Web3/Web3TokenReceiverViewController.swift b/Mixin/UserInterface/Controllers/Web3/Web3TokenReceiverViewController.swift
@@ -66,14 +66,8 @@ final class Web3TokenReceiverViewController: TokenReceiverViewController {
                 )
                 transfer.manipulateNavigationStackOnFinished = true
                 Web3PopupCoordinator.enqueue(popup: .request(transfer))
-            case .solAmountTooSmall:
-                let cost = CurrencyFormatter.localizedString(
-                    from: Solana.accountCreationCost,
-                    format: .precision,
-                    sign: .never,
-                )
-                let description = R.string.localizable.send_sol_for_rent(cost)
-                self.showError(description: description)
+            case let .rentExemptionFailed(reason):
+                self.showError(description: reason.localizedDescription)
             }
         } onFailure: { [weak self] error in
             self?.showError(description: error.localizedDescription)