Tx IO displays - For fun, add the following:

- highlight coinbase spends
- highlight very old (5+ year) UTXO spends

To do this, when summarizing tx details store whether it's a coinbase spend and the time of input txs

app/api/coreApi.js

@@ -19,7 +19,7 @@ var rpcApi = require("./rpcApi.js");
 
 // this value should be incremented whenever data format changes, to avoid
 // pulling old-format data from a persistent cache
-var cacheKeyVersion = "v0";
+var cacheKeyVersion = "v1";
 
 
 const ONE_SEC = 1000;
@@ -581,6 +581,11 @@ function getSummarizedTransactionOutput(txid, voutIndex) {
 				}
 
 				vout.txid = txid;
+				vout.utxoTime = rawTx.time;
+
+				if (rawTx.vin.length == 1 && rawTx.vin[0].coinbase) {
+					vout.coinbaseSpend = true;
+				}
 
 				resolve(vout);
 

views/includes/transaction-io-details.pug

@@ -63,6 +63,20 @@ div.row.text-monospace
 										div.word-wrap
 											small.data-tag.bg-dark.mr-2
 												span(title=`Input Type: ${utils.outputTypeName(vout.scriptPubKey.type)}`, data-toggle="tooltip") #{utils.outputTypeAbbreviation(vout.scriptPubKey.type)}
+
+											if (vout.coinbaseSpend)
+												small.data-tag.bg-success.mr-2
+													span(title=`This input spends a coinbase output (mining reward).`, data-toggle="tooltip") coinbase-spend
+
+											if (vout.utxoTime)
+												- var deltaT = tx.time - vout.utxoTime
+												- var deltaTYears = deltaT / 60 / 60 / 24 / 365
+
+												if (deltaTYears > 5)
+													span.mr-2(title=`This UTXO was very old! It existed for ${parseInt(deltaTYears)}+ years - from ${moment.utc(new Date(vout.utxoTime * 1000)).format('MMM D, Y')} until ${moment.utc(new Date(tx.time * 1000)).format('MMM D, Y')} - before being spent (destroyed) in this transaction!`, data-toggle="tooltip")
+														i.fas.fa-certificate.text-primary
+												
+											
 											a(href=("/tx/" + txInput.txid + "#output-" + txVin.vout)) #{utils.ellipsize(txInput.txid, 26)}
 												span  ##{txVin.vout}