From c6858c64aedcbdfe4af772d881fb1da48dc71de2 Mon Sep 17 00:00:00 2001
From: NikVolf <nikvolf@gmail.com>
Date: Wed, 14 Dec 2016 13:08:19 +0100
Subject: [PATCH] wip

---
 verification/src/accept_block.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/verification/src/accept_block.rs b/verification/src/accept_block.rs
index 5e158a33..eedd866c 100644
--- a/verification/src/accept_block.rs
+++ b/verification/src/accept_block.rs
@@ -114,6 +114,29 @@ impl<'a> BlockCoinbaseClaim<'a> {
 impl<'a> BlockRule for BlockCoinbaseClaim<'a> {
 	fn check(&self) -> Result<(), Error> {
 		let store = DuplexTransactionOutputProvider::new(self.store, &*self.block);
+
+		let mut fee: u64 = 0;
+
+		for tx in self.block.transactions.iter().skip(1) {
+			let mut incoming: u64 = 0;
+			for input in tx.inputs.iter() {
+				let (sum, overflow) = incoming.overflowing_add(
+					store.previous_transaction_output(&input.previous_output).map(|o| o.value).unwrap_or(0));
+				if overflow {
+					return Err(Error::ReferencedInputsSumOverflow);
+				}
+				incoming = sum;
+			}
+
+			let spends = tx.total_spends();
+
+			let (sum, overflow) = fee.overflowing_add(incoming);
+			if overflow {
+				return Err(Error::
+			}
+
+		}
+
 		let available = self.block.transactions.iter()
 			.skip(1)
 			.flat_map(|tx| tx.raw.inputs.iter())