diff --git a/apps/web/src/features/earn/components/stake/StakeDialog.test.tsx b/apps/web/src/features/earn/components/stake/StakeDialog.test.tsx
new file mode 100644
index 0000000..a582bb5
--- /dev/null
+++ b/apps/web/src/features/earn/components/stake/StakeDialog.test.tsx
@@ -0,0 +1,79 @@
+import { describe, it, expect, afterEach, vi } from "vitest"
+import { cleanup, render, screen } from "@testing-library/react"
+import userEvent from "@testing-library/user-event"
+import { StakeDialog } from "./StakeDialog"
+
+// Mock the mutation hook
+const mockMutateAsync = vi.fn().mockResolvedValue("0x123")
+vi.mock("../../hooks/useStakeMutation", () => ({
+  useStakeMutation: () => ({
+    mutateAsync: mockMutateAsync,
+    isPending: false,
+  }),
+}))
+
+afterEach(() => {
+  cleanup()
+  vi.clearAllMocks()
+})
+
+describe("StakeDialog", () => {
+  it("renders correctly and switches tabs", async () => {
+    const user = userEvent.setup()
+    render(<StakeDialog isOpen={true} onOpenChange={() => {}} />)
+
+    // Check defaults (stake mode)
+    expect(screen.getByRole("heading", { name: "Stake SO4" })).toBeInTheDocument()
+    expect(screen.getByText("Duration Multiplier")).toBeInTheDocument()
+
+    // Switch to unstake
+    await user.click(screen.getByRole("button", { name: "Unstake" }))
+    expect(screen.getByRole("heading", { name: "Unstake SO4" })).toBeInTheDocument()
+    expect(screen.queryByText("Duration Multiplier")).not.toBeInTheDocument()
+  })
+
+  it("handles input and submit correctly", async () => {
+    const user = userEvent.setup()
+    const onOpenChange = vi.fn()
+
+    render(<StakeDialog isOpen={true} onOpenChange={onOpenChange} />)
+
+    const input = screen.getByPlaceholderText("0.00")
+    await user.type(input, "100")
+
+    const submitBtn = screen.getByRole("button", { name: "Stake SO4", exact: true })
+    expect(submitBtn).not.toBeDisabled()
+
+    await user.click(submitBtn)
+
+    // The mutation is mocked so it will resolve and close the dialog
+    expect(mockMutateAsync).toHaveBeenCalledWith({
+      action: "stake",
+      amount: 100,
+      durationMultiplier: 1, // Default multiplier
+    })
+    expect(onOpenChange).toHaveBeenCalledWith(false)
+  })
+
+  it("changes the duration multiplier when a button is clicked", async () => {
+    const user = userEvent.setup()
+    const onOpenChange = vi.fn()
+
+    render(<StakeDialog isOpen={true} onOpenChange={onOpenChange} />)
+
+    const input = screen.getByPlaceholderText("0.00")
+    await user.type(input, "50")
+
+    // Click the 2x multiplier
+    await user.click(screen.getByRole("button", { name: "2x" }))
+
+    const submitBtn = screen.getByRole("button", { name: "Stake SO4", exact: true })
+    await user.click(submitBtn)
+
+    expect(mockMutateAsync).toHaveBeenCalledWith({
+      action: "stake",
+      amount: 50,
+      durationMultiplier: 2,
+    })
+  })
+})
diff --git a/apps/web/src/features/earn/components/stake/StakeDialog.tsx b/apps/web/src/features/earn/components/stake/StakeDialog.tsx
new file mode 100644
index 0000000..f356928
--- /dev/null
+++ b/apps/web/src/features/earn/components/stake/StakeDialog.tsx
@@ -0,0 +1,114 @@
+import { useState } from "react"
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+} from "@workspace/ui/components/dialog"
+import { Button } from "@workspace/ui/components/button"
+import { Input } from "@workspace/ui/components/input"
+import { useStakeMutation } from "../../hooks/useStakeMutation"
+
+export type StakeDialogProps = {
+  isOpen: boolean
+  onOpenChange: (open: boolean) => void
+  initialAction?: "stake" | "unstake"
+}
+
+export function StakeDialog({
+  isOpen,
+  onOpenChange,
+  initialAction = "stake",
+}: StakeDialogProps) {
+  const [action, setAction] = useState<"stake" | "unstake">(initialAction)
+  const [amount, setAmount] = useState("")
+  const [multiplier, setMultiplier] = useState(1)
+  const mutation = useStakeMutation()
+
+  const handleSubmit = async () => {
+    const parsedAmount = parseFloat(amount)
+    if (isNaN(parsedAmount) || parsedAmount <= 0) return
+
+    try {
+      await mutation.mutateAsync({
+        action,
+        amount: parsedAmount,
+        durationMultiplier: multiplier,
+      })
+      onOpenChange(false)
+      setAmount("")
+      setMultiplier(1)
+    } catch (err) {
+      // errors handled by submitTx or mutation onError
+    }
+  }
+
+  return (
+    <Dialog open={isOpen} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-md">
+        <DialogHeader>
+          <DialogTitle>{action === "stake" ? "Stake SO4" : "Unstake SO4"}</DialogTitle>
+        </DialogHeader>
+
+        <div className="mb-4 flex gap-2">
+          <Button
+            variant={action === "stake" ? "default" : "outline"}
+            onClick={() => setAction("stake")}
+            className="w-full"
+          >
+            Stake
+          </Button>
+          <Button
+            variant={action === "unstake" ? "default" : "outline"}
+            onClick={() => setAction("unstake")}
+            className="w-full"
+          >
+            Unstake
+          </Button>
+        </div>
+
+        <div className="space-y-4">
+          <div>
+            <label className="mb-2 block text-sm font-medium">Amount</label>
+            <Input
+              type="number"
+              placeholder="0.00"
+              value={amount}
+              onChange={(e) => setAmount(e.target.value)}
+            />
+          </div>
+
+          {action === "stake" && (
+            <div>
+              <label className="mb-2 block text-sm font-medium">Duration Multiplier</label>
+              <div className="flex gap-2">
+                {[1, 1.5, 2].map((m) => (
+                  <Button
+                    key={m}
+                    variant={multiplier === m ? "default" : "outline"}
+                    onClick={() => setMultiplier(m)}
+                    className="flex-1"
+                  >
+                    {m}x
+                  </Button>
+                ))}
+              </div>
+            </div>
+          )}
+
+          <Button
+            className="w-full"
+            disabled={mutation.isPending || !amount || parseFloat(amount) <= 0}
+            onClick={() => void handleSubmit()}
+          >
+            {mutation.isPending
+              ? "Confirming..."
+              : action === "stake"
+                ? "Stake SO4"
+                : "Unstake SO4"}
+          </Button>
+        </div>
+      </DialogContent>
+    </Dialog>
+  )
+}
diff --git a/apps/web/src/features/earn/hooks/useStakeMutation.ts b/apps/web/src/features/earn/hooks/useStakeMutation.ts
new file mode 100644
index 0000000..91019d5
--- /dev/null
+++ b/apps/web/src/features/earn/hooks/useStakeMutation.ts
@@ -0,0 +1,27 @@
+import { useMutation } from "@tanstack/react-query"
+import { useWalletStore } from "@/features/wallet/store/wallet-store"
+import { stakeSO4, unstakeSO4 } from "../../lib/earn"
+
+export function useStakeMutation() {
+  const { address } = useWalletStore()
+
+  return useMutation({
+    mutationFn: async ({
+      action,
+      amount,
+      durationMultiplier,
+    }: {
+      action: "stake" | "unstake"
+      amount: number
+      durationMultiplier?: number
+    }) => {
+      if (!address) throw new Error("Wallet not connected")
+
+      if (action === "stake") {
+        return stakeSO4(address, amount) // Note: smart contract currently only accepts account & amount
+      } else {
+        return unstakeSO4(address, amount)
+      }
+    },
+  })
+}