Add system set_code example

Cargo.toml

@@ -132,6 +132,11 @@ path = "src/examples/example_get_existential_deposit.rs"
 [[example]]
 name = "example_transfer_using_seed"
 path = "src/examples/example_transfer_using_seed.rs"
+
+[[example]]
+name = "example_setcode_extrinsic"
+path = "src/examples/example_setcode_extrinsic.rs"
+
 # DEPRECATED. might work but too much work to maintain, sorry
 
 # needed for contract example

src/examples/example_setcode_extrinsic.rs

@@ -0,0 +1,78 @@
+/*
+    Copyright 2019 Supercomputing Systems AG
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+///! Example that shows how to compose a setCode extrinsic.
+/// Upgrade from node 1.05 to 1.0.6: use wasm integritee_node_runtime-v6.compact.wasm
+use clap::{load_yaml, App};
+use sp_core::crypto::Ss58Codec;
+use sp_core::{crypto::Pair, sr25519};
+use support::weights::Weight;
+
+use substrate_api_client::rpc::WsRpcClient;
+use substrate_api_client::{compose_call, compose_extrinsic, Api, UncheckedExtrinsicV4, XtStatus};
+
+fn main() {
+    env_logger::init();
+    let url = get_node_url_from_cli();
+
+    // Alice's seed: subkey inspect //Alice
+    let from: sr25519::Pair = Pair::from_string(
+        "0xe5be9a5092b81bca64be81d212e7f2f9eba183bb7a90954f7b76361f6edb5c0a",
+        None,
+    )
+    .unwrap();
+    println!("signer account: {}", from.public().to_ss58check());
+
+    let client = WsRpcClient::new(&url);
+    let api = Api::new(client)
+        .map(|api| api.set_signer(from.clone()))
+        .unwrap();
+
+    //let new_wasm: &[u8] = include_bytes!("integritee_node_runtime-v6.compact.wasm");
+    let new_wasm: &[u8] = include_bytes!("integritee_runtime-v12.compact.compressed.wasm");
+
+    // this call can only be called by sudo
+    #[allow(clippy::redundant_clone)]
+    let call = compose_call!(
+        api.metadata.clone(),
+        "System",
+        "set_code",
+        new_wasm.to_vec()
+    );
+
+    let weight: Weight = 0;
+
+    #[allow(clippy::redundant_clone)]
+    let xt: UncheckedExtrinsicV4<_> =
+        compose_extrinsic!(api.clone(), "Sudo", "sudo_unchecked_weight", call, weight);
+
+    // send and watch extrinsic until finalized
+    let tx_hash = api
+        .send_extrinsic(xt.hex_encode(), XtStatus::InBlock)
+        .unwrap();
+
+    println!("[+] Transaction got included. Hash: {:?}", tx_hash);
+}
+
+pub fn get_node_url_from_cli() -> String {
+    let yml = load_yaml!("../../src/examples/cli.yml");
+    let matches = App::from_yaml(yml).get_matches();
+
+    let node_ip = matches.value_of("node-server").unwrap_or("ws://127.0.0.1");
+    let node_port = matches.value_of("node-port").unwrap_or("9944");
+    let url = format!("{}:{}", node_ip, node_port);
+    println!("Interacting with node on {}\n", url);
+    url
+}