feat(dapps): fetch max fees per gas from blockchain if not provided

Updates: #15192

src/app/modules/shared_modules/wallet_connect/controller.nim

@@ -71,5 +71,5 @@ QtObject:
   proc sendTransaction*(self: Controller, address: string, chainId: int, password: string, txJson: string): string {.slot.} =
     return self.service.sendTransaction(address, chainId, password, txJson)
 
-  proc getEstimatedTimeMinutesInterval(self: Controller, chainId: int, maxFeePerGas: string): int {.slot.} =
-    return self.service.getEstimatedTimeMinutesInterval(chainId, maxFeePerGas).int
+  proc getEstimatedTime(self: Controller, chainId: int, maxFeePerGasHex: string): int {.slot.} =
+    return self.service.getEstimatedTime(chainId, maxFeePerGasHex).int

src/app_service/service/wallet_connect/service.nim

@@ -208,6 +208,20 @@ QtObject:
 
     return txResponse.getStr
 
-  proc getEstimatedTimeMinutesInterval*(self: Service, chainId: int, maxFeePerGas: string): EstimatedTime =
-    let maxFeePerGasInt = parseHexInt(maxFeePerGas)
-    return self.transactions.getEstimatedTime(chainId, $(maxFeePerGasInt.float))
+  # empty maxFeePerGasHex will fetch the current chain's maxFeePerGas
+  proc getEstimatedTime*(self: Service, chainId: int, maxFeePerGasHex: string): EstimatedTime =
+    var maxFeePerGas: float64
+    if maxFeePerGasHex.isEmptyOrWhitespace:
+      let chainFees = self.transactions.suggestedFees(chainId)
+      if chainFees.isNil:
+        return EstimatedTime.Unknown
+
+      # For non-EIP-1559 chains, we use the high fee
+      if chainFees.eip1559Enabled:
+        maxFeePerGas = chainFees.maxFeePerGasM
+      else:
+        maxFeePerGas = chainFees.maxFeePerGasL
+    else:
+      let maxFeePerGasInt = parseHexInt(maxFeePerGasHex)
+      maxFeePerGas = maxFeePerGasInt.float
+    return self.transactions.getEstimatedTime(chainId, $(maxFeePerGas))

ui/app/AppLayouts/Wallet/services/dapps/DAppsRequestHandler.qml

@@ -337,15 +337,13 @@ QObject {
                 tx = SessionRequest.methods.sendTransaction.getTxObjFromData(data)
             }
 
+            // Empty string instructs getEstimatedTime to fetch the blockchain value
             var maxFeePerGas = ""
             if (!!tx.maxFeePerGas) {
                 maxFeePerGas = tx.maxFeePerGas
             } else if (!!tx.gasPrice) {
                 maxFeePerGas = tx.gasPrice
             }
-            if (!maxFeePerGas) {
-                return ""
-            }
 
             return root.store.getEstimatedTime(chainId, maxFeePerGas)
         }

ui/imports/shared/stores/DAppsStore.qml

@@ -64,9 +64,10 @@ QObject {
         return tx
     }
 
+    // Empty maxFeePerGas will fetch the current chain's maxFeePerGas
     // Returns ui/imports/utils -> Constants.TransactionEstimatedTime values
-    function getEstimatedTime(chainId, maxFeePerGas) {
-        return controller.getEstimatedTime(chainId, maxFeePerGas)
+    function getEstimatedTime(chainId, maxFeePerGasHex) {
+        return controller.getEstimatedTime(chainId, maxFeePerGasHex)
     }
 
     // Returns the hex encoded signature of the transaction or empty string if error