diff --git a/src/components/FeeEstimator.tsx b/src/components/FeeEstimator.tsx
index e39dd99..d16f628 100644
--- a/src/components/FeeEstimator.tsx
+++ b/src/components/FeeEstimator.tsx
@@ -18,7 +18,6 @@ interface FeeEstimatorProps {
   /** Compact single-line display variant. */
   compact?: boolean;
   /** Callback fired when fee data loads successfully. */
-  variant?: "default" | "compact";
   onFeeLoad?: (fee: FeeData) => void;
 }
 
@@ -26,7 +25,6 @@ export function FeeEstimator({
   className,
   refreshInterval = 0,
   compact,
-  variant = "default",
   onFeeLoad,
 }: FeeEstimatorProps) {
   const [fee, setFee] = useState<FeeData | null>(null);
@@ -45,8 +43,6 @@ export function FeeEstimator({
       setError(null);
       if (data && onFeeLoad) {
         onFeeLoad(data);
-      if (data) {
-        onFeeLoad?.(data);
       }
     } finally {
       setLoading(false);
@@ -144,54 +140,7 @@ export function FeeEstimator({
                   }
                 />
               </div>
-        <button
-          onClick={() => void load()}
-          disabled={loading}
-          className="p-1.5 rounded-lg hover:bg-surface-2 text-ink-3 hover:text-ink-2 transition-colors disabled:opacity-40"
-          title="Refresh"
-          aria-label="Refresh fee estimate"
-        >
-          <HugeiconsIcon
-            icon={Refresh01Icon}
-            size={14}
-            color="currentColor"
-            strokeWidth={1.5}
-            className={loading ? "animate-spin" : ""}
-          />
-        </button>
-      </div>
-
-      <div className="px-5 py-4" aria-live="polite" aria-atomic="true">
-        {loading && !fee ? (
-          variant === "compact" ? (
-            <div className="h-6 w-28 rounded-lg bg-surface-2 animate-pulse" />
-          ) : (
-            <div className="flex gap-4">
-              <div className="h-8 w-24 rounded-lg bg-surface-2 animate-pulse" />
-              <div className="h-8 w-24 rounded-lg bg-surface-2 animate-pulse" />
-            </div>
-          )
-        ) : error ? (
-          <p className="text-[12px] text-red">{error}</p>
-        ) : fee ? (
-          variant === "compact" ? (
-            <p className="text-[13px] text-ink">Fee: ~{fee.recommended} stroops</p>
-          ) : (
-            <div className="flex items-center gap-4">
-              <FeeCell label="Base Fee" value={fee.baseFee} unit="stroops" />
-              <div className="w-px h-8 bg-line" />
-              <FeeCell
-                label="Recommended"
-                value={fee.recommended}
-                unit="stroops"
-                highlight
-                highFee={
-                  parseInt(fee.recommended, 10) > parseInt(fee.baseFee, 10) * 2
-                }
-              />
-            </div>
-          )
-        ) : null}
+            ) : null}
           </div>
         </>
       )}
diff --git a/src/components/SorobanPanel.test.tsx b/src/components/SorobanPanel.test.tsx
index 6e1c23c..a5df23b 100644
--- a/src/components/SorobanPanel.test.tsx
+++ b/src/components/SorobanPanel.test.tsx
@@ -1,4 +1,4 @@
-import { fireEvent, render, screen, act } from "@testing-library/react";
+import { act,fireEvent, render, screen } from "@testing-library/react";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import { useSorokit } from "@/context/useSorokit";
@@ -123,7 +123,20 @@ describe("SorobanPanel", () => {
 
   it("grows the argument textarea as lines are added and remains user-resizable", () => {
     render(<SorobanPanel contractId="C123" onContractIdChange={() => {}} />);
-    const textarea = screen.getByLabelText("Arguments (JSON array)");
+    const textarea = screen.getByLabelText(
+      "Arguments (JSON array)",
+    ) as HTMLTextAreaElement;
+
+    expect(textarea.rows).toBe(3);
+    expect(textarea.className).toContain("resize-y");
+
+    fireEvent.input(textarea, {
+      target: { value: "[\n1,\n2,\n3,\n4\n]" },
+    });
+
+    expect(textarea.rows).toBe(6);
+  });
+
   describe("simulate mode", () => {
     it("renders Simulate badge and subtitle", () => {
       render(<SorobanPanel contractId="C123" onContractIdChange={() => {}} mode="simulate" />);
@@ -149,6 +162,7 @@ describe("SorobanPanel", () => {
       fireEvent.click(screen.getByRole("button", { name: /simulate/i }));
       expect(await screen.findByText("Simulation Result", { selector: "span" })).toBeInTheDocument();
     });
+  });
 
   it("updates the textarea height style dynamically on input", () => {
     render(<SorobanPanel contractId="C123" onContractIdChange={() => {}} />);
@@ -162,7 +176,6 @@ describe("SorobanPanel", () => {
 
   // ── Contract ID history (#205) ──────────────────────────────────────────
   describe("contract ID history", () => {
-    const HISTORY_KEY = "sorokit-soroban-contract-history";
     it("shows Simulating… label while loading", async () => {
       let resolveSimulate: (v: { data: unknown; error: null }) => void = () => {};
       mockSimulateContract.mockReturnValueOnce(new Promise((resolve) => { resolveSimulate = resolve; }));
diff --git a/src/components/SorobanPanel.tsx b/src/components/SorobanPanel.tsx
index 0f69b2b..efe13fc 100644
--- a/src/components/SorobanPanel.tsx
+++ b/src/components/SorobanPanel.tsx
@@ -3,13 +3,11 @@ import { useCallback, useEffect, useRef, useState } from "react";
 import { Badge } from "@/components/ui/Badge";
 import { Button } from "@/components/ui/Button";
 import { Input } from "@/components/ui/Input";
-
-import { cn } from "@/lib/utils";
-
-import { ContractInteractionDebugger } from "./ContractInteractionDebugger";
 import { useSorokit } from "@/context/useSorokit";
 import { getClient } from "@/lib/client";
 
+import { ContractInteractionDebugger } from "./ContractInteractionDebugger";
+
 type State = "idle" | "loading" | "success" | "error";
 
 interface SorobanPanelProps {
@@ -76,27 +74,6 @@ function addContractToHistory(contractId: string, current: string[]): string[] {
   return next;
 }
 
-function buildCurlCommand(
-  contractId: string,
-  method: string,
-  args: unknown[],
-): string {
-  const rpcBody = JSON.stringify(
-    {
-      jsonrpc: "2.0",
-      id: 1,
-      method: "simulateTransaction",
-      params: {
-        transaction: `AAAAAgAAAAB7AAAAAAAAAAAAAAABAAAAAeJ0ZXN0AAAAAAAAAQAAABAAAAABAAAAHAAAAAEAAAABAAAAAQAAAAEAAAABAAAAAQAAAAEAAAAAAAAAAAAAAAAKAAAAAAAAAAEAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAA=`,
-      },
-    },
-    null,
-    2,
-  );
-  return `curl -X POST \\
-  -H "Content-Type: application/json" \\
-  -d '${rpcBody}' \\
-  https://soroban-testnet.stellar.org`;
 function buildCurlCommand(contractId: string, method: string, args: unknown[]): string {
   const body = JSON.stringify({ contractId, method, args }, null, 2);
   return `curl -X POST https://soroban-rpc.example.com/invoke \\\n  -H "Content-Type: application/json" \\\n  -d '${body}'`;
@@ -194,20 +171,6 @@ export function SorobanPanel({
         setContractHistory((prev) =>
           addContractToHistory(contractId.trim(), prev),
         );
-      const invoke = mode === "simulate"
-        ? getClient().soroban.simulateContract
-        : getClient().soroban.invokeContract;
-      const { data, error: err } = await invoke({
-        contractId: contractId.trim(),
-        method: method.trim(),
-        args: parsedArgs,
-        sourceAccount: address ?? undefined,
-      });
-      if (signal.aborted) return;
-      if (err) {
-        setError(err);
-        setState("error");
-        return;
       }
     } catch (e) {
       if (!signal.aborted) {
@@ -477,7 +440,8 @@ export function SorobanPanel({
         <Button
           size="md"
           loading={state === "loading"}
-          disabled={!canInvoke || state === "loading"}
+          // `canInvoke` already requires state !== "loading".
+          disabled={!canInvoke}
           onClick={handleClick}
         >
           {state === "loading"
@@ -486,7 +450,6 @@ export function SorobanPanel({
               : "Invoking…"
             : mode === "simulate"
               ? "Simulate Contract"
-              ? "Simulate"
               : "Invoke Contract"}
         </Button>
       </div>