Fix rounded vsize in block summaries

backend/src/api/blocks.ts

@@ -130,7 +130,7 @@ class Blocks {
     const stripped = block.tx.map((tx) => {
       return {
         txid: tx.txid,
-        vsize: tx.vsize,
+        vsize: tx.weight / 4,
         fee: tx.fee ? Math.round(tx.fee * 100000000) : 0,
         value: Math.round(tx.vout.reduce((acc, vout) => acc + (vout.value ? vout.value : 0), 0) * 100000000)
       };