transaction: Add utxo handler.

Author: ceyhunsen

Diff for: src/ledger/transactions.rs

@@ -57,6 +57,8 @@ impl Ledger {
 
         self.add_mempool_transaction(txid)?;
 
+        self.handle_transaction_utxos(&transaction)?;
+
         Ok(txid)
     }
 
@@ -267,6 +269,20 @@ impl Ledger {
         amount
     }
 
+    /// Removes inputs from UTXOs and adds outputs to UTXOs.
+    pub fn handle_transaction_utxos(&self, transaction: &Transaction) -> Result<(), LedgerError> {
+        for input in &transaction.input {
+            self.remove_utxo(input.previous_output)?;
+        }
+
+        let txid = transaction.compute_txid();
+        for vout in 0..(transaction.output.len() as u32) {
+            self.add_utxo(OutPoint { txid, vout })?;
+        }
+
+        Ok(())
+    }
+
     /// Creates a `TxIn` with some defaults.
     pub fn create_txin(&self, txid: Txid, vout: u32) -> TxIn {
         TxIn {