Improve wallet + node API Comms error logging (#2472)

* make wallet+node communication errors more verbose

* rustfmt

wallet/src/adapters/http.rs

@@ -48,10 +48,15 @@ impl WalletCommAdapter for HTTPWalletCommAdapter {
 		let url = format!("{}/v1/wallet/foreign/receive_tx", dest);
 		debug!("Posting transaction slate to {}", url);
 
-		let res = api::client::post(url.as_str(), None, slate).context(
-			ErrorKind::ClientCallback("Posting transaction slate (is recipient listening?)"),
-		)?;
-		Ok(res)
+		let res = api::client::post(url.as_str(), None, slate);
+		match res {
+			Err(e) => {
+				let report = format!("Posting transaction slate (is recipient listening?): {}", e);
+				error!("{}", report);
+				Err(ErrorKind::ClientCallback(report).into())
+			}
+			Ok(r) => Ok(r),
+		}
 	}
 
 	fn send_tx_async(&self, _dest: &str, _slate: &Slate) -> Result<(), Error> {

wallet/src/adapters/keybase.rs

@@ -291,7 +291,11 @@ impl WalletCommAdapter for KeybaseWalletCommAdapter {
 		// Send original slate to recipient with the SLATE_NEW topic
 		match send(slate, addr, SLATE_NEW, TTL) {
 			true => (),
-			false => return Err(ErrorKind::ClientCallback("Posting transaction slate"))?,
+			false => {
+				return Err(ErrorKind::ClientCallback(
+					"Posting transaction slate".to_owned(),
+				))?
+			}
 		}
 		info!(
 			"tx request has been sent to @{}, tx uuid: {}",
@@ -300,7 +304,11 @@ impl WalletCommAdapter for KeybaseWalletCommAdapter {
 		// Wait for response from recipient with SLATE_SIGNED topic
 		match poll(TTL as u64, addr) {
 			Some(slate) => return Ok(slate),
-			None => return Err(ErrorKind::ClientCallback("Receiving reply from recipient"))?,
+			None => {
+				return Err(ErrorKind::ClientCallback(
+					"Receiving reply from recipient".to_owned(),
+				))?
+			}
 		}
 	}