less chatty Testnet1 outputs (#316)

Fixes #281 by doing:

- "Starting validation pipeline for " -> "Processing "
- stdout logging default = Warning
- ERR -> INFO for "Transaction rejected: Already in pool" -- only for netadapter transaction_received, which (hopefully!) only gets tx from peers, and lots of those will be duplicates, that's good and not an error.

* Downgrade ERR even down to DEBUG.

Also let Transaction rejected show tx hash,
 so users can check if such a rejection is for the
 payment they expected, or just any random peer
 sending in some old and already known tx.

chain/src/pipe.rs

@@ -51,9 +51,9 @@ pub fn process_block(b: &Block, mut ctx: BlockContext) -> Result<Option<Tip>, Er
 	// TODO should just take a promise for a block with a full header so we don't
  // spend resources reading the full block when its header is invalid
 
-	info!(
+	debug!(
 		LOGGER,
-		"Starting validation pipeline for block {} at {} with {} inputs and {} outputs.",
+		"Processing block {} at {} with {} inputs and {} outputs.",
 		b.hash(),
 		b.header.height,
 		b.inputs.len(),
@@ -94,9 +94,9 @@ pub fn process_block(b: &Block, mut ctx: BlockContext) -> Result<Option<Tip>, Er
 
 /// Process the block header
 pub fn process_block_header(bh: &BlockHeader, mut ctx: BlockContext) -> Result<Option<Tip>, Error> {
-	info!(
+	debug!(
 		LOGGER,
-		"Starting validation pipeline for block header {} at {}.",
+		"Processing header {} at {}.",
 		bh.hash(),
 		bh.height
 	);

grin.toml

@@ -63,7 +63,7 @@ port = 13414
 log_to_stdout = true
 
 # Log level for stdout: Critical, Error, Warning, Info, Debug, Trace
-stdout_log_level = "Debug"
+stdout_log_level = "Warning"
 
 # Whether to log to a file
 log_to_file = true

grin/src/adapters.rs

@@ -57,8 +57,9 @@ impl NetAdapter for NetToChainAdapter {
 			source.identifier,
 		);
 
+		let h = tx.hash();
 		if let Err(e) = self.tx_pool.write().unwrap().add_to_memory_pool(source, tx) {
-			error!(LOGGER, "Transaction rejected: {:?}", e);
+			debug!(LOGGER, "Transaction {} rejected: {:?}", h, e);
 		}
 	}