added signTypedData example

implementations/kt/src/commonTest/kotlin/io/polywrap/plugins/ethereum/EthereumExample.kt

@@ -0,0 +1,45 @@
+package io.polywrap.plugins.ethereum
+
+import io.polywrap.configBuilder.polywrapClient
+import io.polywrap.core.InvokeResult
+import io.polywrap.core.resolution.Uri
+import io.polywrap.plugins.ethereum.wrap.ArgsRequest
+import kotlinx.coroutines.test.runTest
+import kotlin.test.*
+import typedDataJsonString
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+
+class EthereumExample {
+
+    private val uri = Uri("wrap://ens/wraps.eth:[email protected]")
+    private val client = polywrapClient {
+        setPackage(
+            uri.toString() to ethereumWalletPlugin(
+                Connections(
+                    networks = mutableMapOf(
+                        "testnet" to Connection(
+                            provider = "http://localhost:8545"
+                        )
+                    ),
+                    defaultNetwork = "testnet"
+                )
+            )
+        )
+    }
+
+    @Test
+    fun signTypedData() = runTest {
+        val args = ArgsRequest("eth_signTypedData_v4", "[\"0x90F8bf6A479f320ead074411a4B0e7944Ea8c9C1\", $typedDataJsonString]")
+        val result: InvokeResult<String> = client.invoke(
+            uri = uri,
+            method = "request",
+            args = args
+        )
+        assertNull(result.exceptionOrNull())
+        assertEquals(
+            "0x12bdd486cb42c3b3c414bb04253acfe7d402559e7637562987af6bd78508f38623c1cc09880613762cc913d49fd7d3c091be974c0dee83fb233300b6b58727311c",
+            result.getOrThrow()
+        )
+    }
+}