update utxopool

blockchain/utxopool.go

@@ -8,7 +8,7 @@ import (
 type UTXOPool struct {
 	// Mapping from address to a map of transaction id to that balance.
 	// The assumption here is that one address only appears once output array in a transaction.
-	utxo map[string]map[string]int
+	utxo map[string]map[string]map[int]int
 }
 
 // VerifyTransactions verifies if a list of transactions valid.