feat(examples): add transactions_with_function example (#195)

* feat(examples): add transactions_with_function example

* Use Result from error mod

* update examples to latest changes

Author: Thoralf-M

bindings/go/examples/transactions_with_function/main.go

@@ -0,0 +1,27 @@
+// Copyright (c) 2025 IOTA Stiftung
+// SPDX-License-Identifier: Apache-2.0
+
+package main
+
+import (
+	"fmt"
+	"log"
+
+	sdk "bindings/iota_sdk_ffi"
+)
+
+func main() {
+	client := sdk.GraphQlClientNewDevnet()
+
+	function := "0x3::iota_system::request_add_stake"
+	transactions, err := client.Transactions(&sdk.TransactionsFilter{
+		Function: &function,
+	}, nil)
+	if err.(*sdk.SdkFfiError) != nil {
+		log.Fatalf("Failed to get transactions: %v", err)
+	}
+
+	for _, transaction := range transactions.Data {
+		fmt.Println("Digest:", transaction.Transaction.Digest().ToBase58())
+	}
+}

bindings/kotlin/examples/TransactionsWithFunction.kt

@@ -0,0 +1,21 @@
+// Copyright (c) 2025 IOTA Stiftung
+// SPDX-License-Identifier: Apache-2.0
+
+import iota_sdk.GraphQlClient
+import iota_sdk.TransactionsFilter
+import kotlinx.coroutines.runBlocking
+
+fun main() = runBlocking {
+    try {
+        val client = GraphQlClient.newDevnet()
+        val transactions =
+                client.transactions(
+                        TransactionsFilter(function = "0x3::iota_system::request_add_stake"),
+                )
+        for (transaction in transactions.data) {
+            println("Digest: ${transaction.transaction.digest().toBase58()}")
+        }
+    } catch (e: Exception) {
+        e.printStackTrace()
+    }
+}

bindings/python/examples/transactions_with_function.py

@@ -0,0 +1,21 @@
+# Copyright (c) 2025 IOTA Stiftung
+# SPDX-License-Identifier: Apache-2.0
+
+import asyncio
+from lib.iota_sdk_ffi import *
+
+
+async def main():
+    try:
+        client = GraphQlClient.new_devnet()
+        transactions = await client.transactions(
+            TransactionsFilter(function="0x3::iota_system::request_add_stake"),
+        )
+        for transaction in transactions.data:
+            print("Digest:", transaction.transaction.digest().to_base58())
+    except Exception as e:
+        print(f"Error: {e}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

crates/iota-graphql-client/examples/chain_id.rs

@@ -1,8 +1,7 @@
 // Copyright (c) 2025 IOTA Stiftung
 // SPDX-License-Identifier: Apache-2.0
 
-use anyhow::Result;
-use iota_graphql_client::Client;
+use iota_graphql_client::{Client, error::Result};
 
 #[tokio::main]
 async fn main() -> Result<()> {

crates/iota-graphql-client/examples/epoch.rs

@@ -1,8 +1,7 @@
 // Copyright (c) 2025 IOTA Stiftung
 // SPDX-License-Identifier: Apache-2.0
 
-use anyhow::Result;
-use iota_graphql_client::Client;
+use iota_graphql_client::{Client, error::Result};
 
 #[tokio::main]
 async fn main() -> Result<()> {

crates/iota-graphql-client/examples/transactions_with_function.rs

@@ -0,0 +1,27 @@
+// Copyright (c) 2025 IOTA Stiftung
+// SPDX-License-Identifier: Apache-2.0
+
+use iota_graphql_client::{
+    Client, error::Result, pagination::PaginationFilter, query_types::TransactionsFilter,
+};
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let client = Client::new_devnet();
+
+    let transactions = client
+        .transactions(
+            TransactionsFilter {
+                function: Some("0x3::iota_system::request_add_stake".to_string()),
+                ..Default::default()
+            },
+            PaginationFilter::default(),
+        )
+        .await?;
+
+    for transaction in transactions.data() {
+        println!("Digest: {}", transaction.transaction.digest());
+    }
+
+    Ok(())
+}

crates/iota-graphql-client/examples/transactions_with_shared.rs

@@ -3,8 +3,7 @@
 
 use std::str::FromStr;
 
-use anyhow::Result;
-use iota_graphql_client::{Client, query_types::TransactionsFilter};
+use iota_graphql_client::{Client, error::Result, query_types::TransactionsFilter};
 use iota_types::ObjectId;
 
 #[tokio::main]