Lots of error handling improvements:

- RPC api now throws errors up to callers on RpcError results
- More consistent handling of errors from baseActionRouter
- Add some missing rejection handlers
- Tweak UI for display of errors
- Handle missing block data on /block pages (in UI) so that error info can be displayed cleanly (rather than the template error showing because data is missing)

app/api/coreApi.js

@@ -802,6 +802,8 @@ function getRawTransactionsWithInputs(txids, maxInputs=-1) {
 
 				resolve({ transactions:transactions, txInputsByTransaction:txInputsByTransaction });
 			});
+		}).catch(function(err) {
+			reject(err);
 		});
 	});
 }
@@ -833,6 +835,8 @@ function getBlockByHashWithTransactions(blockHash, txLimit, txOffset) {
 
 				resolve({ getblock:block, transactions:txsResult.transactions, txInputsByTransaction:txsResult.txInputsByTransaction });
 			});
+		}).catch(function(err) {
+			reject(err);
 		});
 	});
 }

app/api/rpcApi.js

@@ -351,35 +351,44 @@ function getRpcData(cmd) {
 			var client = (cmd == "gettxoutsetinfo" ? global.rpcClientNoTimeout : global.rpcClient);
 
 			client.command(cmd, function(err, result, resHeaders) {
-				if (err) {
+				try {
-					utils.logError("32euofeege", err, {cmd:cmd});
+					if (err) {
+						logStats(cmd, false, new Date().getTime() - startTime, false);
 
-					reject(err);
+						throw new Error(`RpcError: type=failure-01`);
+					}
 
-					callback();
+					if (Array.isArray(result) && result.length == 1) {
+						var result0 = result[0];
+						
+						if (result0 && result0.name && result0.name == "RpcError") {
+							logStats(cmd, false, new Date().getTime() - startTime, false);
 
-					logStats(cmd, false, new Date().getTime() - startTime, false);
+							throw new Error(`RpcError: type=errorResponse-01`);
+						}
+					}
 
-					return;
+					if (result.name && result.name == "RpcError") {
-				}
+						logStats(cmd, false, new Date().getTime() - startTime, false);
 
-				if (result.name && result.name == "RpcError") {
+						throw new Error(`RpcError: type=errorResponse-02`);
-					utils.logError("3084yh4r7ge", result, {cmd:cmd});
+					}
 
-					reject(result);
+					resolve(result);
+
+					logStats(cmd, false, new Date().getTime() - startTime, true);
 
 					callback();
 
-					logStats(cmd, false, new Date().getTime() - startTime, false);
+				} catch (e) {
+					e.userData = {error:err, request:cmd, result:result};
 
-					return;
+					utils.logError("9u4278t5h7rfhgf", e, {error:err, request:cmd, result:result});
-				}
 
-				resolve(result);
+					reject(e);
 
-				logStats(cmd, false, new Date().getTime() - startTime, true);
+					callback();
-
+				}
-				callback();
 			});
 		};
 		
@@ -395,35 +404,44 @@ function getRpcDataWithParams(request) {
 
 		rpcCall = function(callback) {
 			global.rpcClient.command([request], function(err, result, resHeaders) {
-				if (err != null) {
+				try {
-					utils.logError("38eh39hdee", err, {result:result, headers:resHeaders});
+					if (err != null) {
+						logStats(request.method, true, new Date().getTime() - startTime, false);
 
-					reject(err);
+						throw new Error(`RpcError: type=failure-02`);
+					}
 
-					callback();
+					if (Array.isArray(result) && result.length == 1) {
+						var result0 = result[0];
 
-					logStats(request.method, true, new Date().getTime() - startTime, false);
+						if (result0 && result0.name && result0.name == "RpcError") {
+							logStats(request.method, true, new Date().getTime() - startTime, false);
 
-					return;
+							throw new Error(`RpcError: type=errorResponse-03`);
-				}
+						}
+					}
 
-				if (result.name && result.name == "RpcError") {
+					if (result.name && result.name == "RpcError") {
-					utils.logError("23983euewf8d", result, {result:result, headers:resHeaders});
+						logStats(request.method, true, new Date().getTime() - startTime, false);
 
-					reject(result);
+						throw new Error(`RpcError: type=errorResponse-04`);
+					}
 
-					callback();
+					resolve(result[0]);
 
-					logStats(request.method, true, new Date().getTime() - startTime, false);
+					logStats(request.method, true, new Date().getTime() - startTime, true);
 
-					return;
+					callback();
-				}
 
-				resolve(result[0]);
+				} catch (e) {
+					e.userData = {error:err, request:request, result:result};
 
-				logStats(request.method, true, new Date().getTime() - startTime, true);
+					utils.logError("283h7ewsede", e, {error:err, request:request, result:result});
 
-				callback();
+					reject(e);
+
+					callback();
+				}
 			});
 		};
 		

routes/baseActionsRouter.js

@@ -646,6 +646,11 @@ router.get("/block-height/:blockHeight", function(req, res, next) {
 				res.locals.result.txInputsByTransaction = result.txInputsByTransaction;
 
 				resolve();
+
+			}).catch(function(err) {
+				res.locals.pageErrors.push(utils.logError("98493y4758h55", err));
+
+				reject(err);
 			});
 		}));
 
@@ -656,7 +661,7 @@ router.get("/block-height/:blockHeight", function(req, res, next) {
 				resolve();
 
 			}).catch(function(err) {
-				res.locals.userMessage = "Error getting block stats";
+				res.locals.pageErrors.push(utils.logError("983yr435r76d", err));
 
 				reject(err);
 			});
@@ -668,13 +673,15 @@ router.get("/block-height/:blockHeight", function(req, res, next) {
 			next();
 
 		}).catch(function(err) {
-			res.locals.pageErrors.push(utils.logError("3249y2ewgfee", err));
+			res.locals.userMessageMarkdown = `Failed loading block: height=**${blockHeight}**`;
 
 			res.render("block");
 
 			next();
 		});
 	}).catch(function(err) {
+		res.locals.userMessageMarkdown = `Failed loading block: height=**${blockHeight}**`;
+
 		res.locals.pageErrors.push(utils.logError("389wer07eghdd", err));
 
 		res.render("block");
@@ -723,8 +730,8 @@ router.get("/block/:blockHash", function(req, res, next) {
 			resolve();
 
 		}).catch(function(err) {
-			res.locals.userMessage = "Error getting block data";
+			res.locals.pageErrors.push(utils.logError("238h38sse", err));
-
+			
 			reject(err);
 		});
 	}));
@@ -736,8 +743,8 @@ router.get("/block/:blockHash", function(req, res, next) {
 			resolve();
 
 		}).catch(function(err) {
-			res.locals.userMessage = "Error getting block stats";
+			res.locals.pageErrors.push(utils.logError("21983ue8hye", err));
-
+			
 			reject(err);
 		});
 	}));
@@ -748,7 +755,7 @@ router.get("/block/:blockHash", function(req, res, next) {
 		next();
 
 	}).catch(function(err) {
-		res.locals.pageErrors.push(utils.logError("3217wfeghy9sdgs", err));
+		res.locals.userMessageMarkdown = `Failed to load block: **${blockHash}**`;
 
 		res.render("block");
 
@@ -867,7 +874,7 @@ router.get("/tx/:transactionId", function(req, res, next) {
 		});
 
 	}).catch(function(err) {
-		res.locals.userMessage = "Failed to load transaction with txid=" + txid + ": " + err;
+		res.locals.userMessageMarkdown = `Failed to load transaction: txid=**${txid}**`;
 
 		res.locals.pageErrors.push(utils.logError("1237y4ewssgt", err));
 
@@ -1152,7 +1159,7 @@ router.get("/address/:address", function(req, res, next) {
 	}).catch(function(err) {
 		res.locals.pageErrors.push(utils.logError("2108hs0gsdfe", err, {address:address}));
 
-		res.locals.userMessage = "Failed to load address " + address + " (" + err + ")";
+		res.locals.userMessageMarkdown = `Failed to load address: **${address}**`;
 
 		res.render("address");
 

views/address.pug

@@ -6,7 +6,7 @@ block headContent
 block content
 	if (result && result.validateaddress)
 		if (!result.validateaddress.isvalid)
-			div.alert.alert-danger.border-danger.mb-huge
+			div.alert.alert-danger.mb-huge
 				h1.h6.font-weight-bold Invalid Address
 				span.text-monospace #{address}
 				

views/block.pug

@@ -1,13 +1,17 @@
 extends layout
 
 block headContent
-	title Block ##{result.getblock.height.toLocaleString()}, #{result.getblock.hash}
+	if (result.getblock)
+		title Block ##{result.getblock.height.toLocaleString()}, #{result.getblock.hash}
+	else
+		title Block: Error
 
 block content
-	h1.h3 Block 
+	if (result.getblock)
-		small.text-monospace(style="width: 100%;") ##{result.getblock.height.toLocaleString()}
+		h1.h3 Block 
-		br
+			small.text-monospace(style="width: 100%;") ##{result.getblock.height.toLocaleString()}
-		small.text-monospace.word-wrap(style="width: 100%;") #{result.getblock.hash}
+			br
-	hr
+			small.text-monospace.word-wrap(style="width: 100%;") #{result.getblock.hash}
+		hr
 
-	include includes/block-content.pug
+		include includes/block-content.pug

views/includes/page-errors-modal.pug

@@ -8,27 +8,38 @@ div.modal.fade(id="pageErrorsModal" role="dialog" aria-hidden="true")
 					span(aria-hidden="true") ×
 
 			div.modal-body
-				each item, itemIndex in pageErrors
+				if (false)
-					div.card.shadow-sm(class=(itemIndex < (pageErrors.length - 1) ? "mb-3" : false))
+					pre
-						div.card-header
+						code.json #{JSON.stringify(pageErrors, null, 4)}
-							h6.mb-0 Error ##{(itemIndex + 1).toLocaleString()}
-						div.card-body
-							h6 Error Details
-							pre
-								code.json.bg-light #{JSON.stringify(item.error, null, 4)}
-
-							if (item.error.stack)
-								hr
-								h6 Stacktrace
-								pre
-									code.json.bg-light #{item.error.stack}
 
-							if (item.error.userData)
+				if (true)
+					each item, itemIndex in pageErrors
+						div.card.shadow-sm(class=(itemIndex < (pageErrors.length - 1) ? "mb-3" : false))
+							div.card-body
+								h6 Error ##{(itemIndex + 1).toLocaleString()}
 								hr
+								//pre
+								//	code.json.bg-light #{JSON.stringify(item.error, null, 4)}
+
+								//pre
+								//	code.json.bg-light #{JSON.stringify(item, null, 4)}
+
+								if (item.error.userData)
+									div.mb-3
+										h4.h6 Error Data
+
+										div.highlight
+											pre
+												code.json.bg-light #{JSON.stringify(item.error.userData, null, 4)}
+
+								if (item.error.stack)
+									h6 Stacktrace
+									- var stackFirstNLines = item.error.stack.split("\n").slice(0, 7).join("\n");
+									div.highlight
+										pre
+											code.json.bg-light #{stackFirstNLines}
 
-								h4.h6 User Data
+								
-								pre
-									code.json.bg-light #{JSON.stringify(item.error.userData, null, 4)}
 
 			div.modal-footer
 				button.btn.btn-secondary(type="button" data-dismiss="modal") Close