feat: add logging

Cargo.toml

@@ -15,6 +15,7 @@ rust-version = "1.56.0"
 version = "0.3.0"
 
 [dependencies]
+log = "0.4.17"
 uuid = { version = "0.8", features = ["v4"], optional = true }
 borsh = "0.9"
 serde = "1.0.127"
@@ -30,6 +31,7 @@ near-jsonrpc-primitives = "0.12.0"
 
 [dev-dependencies]
 tokio = { version = "1.1", features = ["rt", "macros"] }
+env_logger = "0.9.0"
 
 [features]
 default = ["auth"]

examples/access_keys.rs

@@ -17,6 +17,8 @@ fn indent(indentation: usize, s: String) -> String {
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = utils::select_network()?;
 
     let account_id = utils::input("Enter the Account ID whose keys we're listing: ")?.parse()?;

examples/auth.rs

@@ -43,6 +43,8 @@ async fn authorized() -> Result<(), Box<dyn std::error::Error>> {
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     unauthorized().await?;
 
     authorized().await?;

examples/contract_change_method.rs

@@ -11,6 +11,8 @@ mod utils;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = JsonRpcClient::connect("https://rpc.testnet.near.org");
 
     let signer_account_id = utils::input("Enter the signer Account ID: ")?.parse()?;

examples/contract_change_method_commit.rs

@@ -9,6 +9,8 @@ mod utils;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = JsonRpcClient::connect("https://rpc.testnet.near.org");
 
     let signer_account_id = utils::input("Enter the signer Account ID: ")?.parse()?;

examples/contract_view_code.rs

@@ -7,6 +7,8 @@ mod utils;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = utils::select_network()?;
 
     let contract_id: AccountId =

examples/contract_view_method.rs

@@ -17,6 +17,8 @@ pub struct AccountStatus {
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = JsonRpcClient::connect("https://rpc.testnet.near.org");
 
     let account_id = utils::input("Enter the account to view: ")?;

examples/create_account.rs

@@ -82,6 +82,8 @@ async fn get_current_nonce(
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = utils::select_network()?;
 
     let signer_account_id = loop {

examples/query_block.rs

@@ -59,6 +59,8 @@ pub fn specify_block_reference() -> std::io::Result<near_primitives::types::Bloc
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = utils::select_network()?;
 
     // tolerate only 3 retries

examples/view_account.rs

@@ -7,6 +7,8 @@ mod utils;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
     let client = utils::select_network()?;
 
     let account_id: AccountId = utils::input("Enter an Account ID to lookup: ")?.parse()?;

src/lib.rs

@@ -141,6 +141,8 @@ pub struct JsonRpcClientConnector {
 impl JsonRpcClientConnector {
     /// Return a JsonRpcClient that connects to the specified server.
     pub fn connect<U: AsUrl>(&self, server_addr: U) -> JsonRpcClient {
+        log::info!("returned a new JSONRPC client handle");
+
         JsonRpcClient {
             inner: Arc::new(JsonRpcInnerClient {
                 server_addr: server_addr.to_string(),
@@ -207,6 +209,8 @@ impl JsonRpcClient {
             ))
         })?;
 
+        log::info!("request payload: {:#}", request_payload);
+
         let request_payload = serde_json::to_vec(&request_payload).map_err(|err| {
             JsonRpcError::TransportError(RpcTransportError::SendError(
                 JsonRpcTransportSendError::PayloadSerializeError(err.into()),
@@ -250,6 +254,10 @@ impl JsonRpcClient {
         })?;
         let response_payload = serde_json::from_slice::<serde_json::Value>(&response_payload);
 
+        if let Ok(ref response_payload) = response_payload {
+            log::info!("response payload: {:#}", response_payload);
+        }
+
         let response_message = near_jsonrpc_primitives::message::decoded_to_parsed(
             response_payload.and_then(serde_json::from_value),
         )
@@ -342,6 +350,7 @@ impl JsonRpcClient {
             reqwest::header::HeaderValue::from_static("application/json"),
         );
 
+        log::info!("initialized a new JSONRPC client connector");
         JsonRpcClientConnector {
             client: reqwest::Client::builder()
                 .default_headers(headers)