From 5dba43178b1c24e303b6ebe180b406a4cad693a9 Mon Sep 17 00:00:00 2001
From: Arkadiy Paronyan <arkady.paronyan@gmail.com>
Date: Sat, 16 Jul 2016 19:49:52 +0200
Subject: [PATCH] Removed DAO soft fork traces (#1639)

---
 ethcore/src/error.rs        |  3 ---
 ethcore/src/evm/schedule.rs |  3 ---
 ethcore/src/state.rs        | 27 ---------------------------
 rpc/src/v1/impls/mod.rs     |  1 -
 4 files changed, 34 deletions(-)

diff --git a/ethcore/src/error.rs b/ethcore/src/error.rs
index d492c2cf5..26a645322 100644
--- a/ethcore/src/error.rs
+++ b/ethcore/src/error.rs
@@ -59,8 +59,6 @@ pub enum TransactionError {
 	},
 	/// Transaction's gas limit (aka gas) is invalid.
 	InvalidGasLimit(OutOfBounds<U256>),
-	/// Transaction is invalid for some other reason.
-	DAORescue,
 }
 
 impl fmt::Display for TransactionError {
@@ -79,7 +77,6 @@ impl fmt::Display for TransactionError {
 			GasLimitExceeded { limit, got } =>
 				format!("Gas limit exceeded. Limit={}, Given={}", limit, got),
 			InvalidGasLimit(ref err) => format!("Invalid gas limit. {}", err),
-			DAORescue => "Transaction is invalid due to the DAO rescue.".into(),
 		};
 
 		f.write_fmt(format_args!("Transaction error ({})", msg))
diff --git a/ethcore/src/evm/schedule.rs b/ethcore/src/evm/schedule.rs
index 188e72373..f82157239 100644
--- a/ethcore/src/evm/schedule.rs
+++ b/ethcore/src/evm/schedule.rs
@@ -80,8 +80,6 @@ pub struct Schedule {
 	pub tx_data_non_zero_gas: usize,
 	/// Gas price for copying memory
 	pub copy_gas: usize,
-	/// DAO Rescue softfork block
-	pub reject_dao_transactions: bool,
 }
 
 impl Schedule {
@@ -128,7 +126,6 @@ impl Schedule {
 			tx_data_zero_gas: 4,
 			tx_data_non_zero_gas: 68,
 			copy_gas: 3,	
-			reject_dao_transactions: false,
 		}
 	}
 }
diff --git a/ethcore/src/state.rs b/ethcore/src/state.rs
index 92a501e80..3c1b5e7c0 100644
--- a/ethcore/src/state.rs
+++ b/ethcore/src/state.rs
@@ -232,33 +232,6 @@ impl State {
 		let options = TransactOptions { tracing: tracing, vm_tracing: false, check_nonce: true };
 		let e = try!(Executive::new(self, env_info, engine, vm_factory).transact(t, options));
 
-		let broken_dao = H256::from("6a5d24750f78441e56fec050dc52fe8e911976485b7472faac7464a176a67caa");
-
-		// dao attack soft fork
-		if engine.schedule(&env_info).reject_dao_transactions {
-			let whitelisted = if let Action::Call(to) = t.action {
-				to == Address::from("Da4a4626d3E16e094De3225A751aAb7128e96526") ||
-				to == Address::from("2ba9D006C1D72E67A70b5526Fc6b4b0C0fd6D334")
-			} else { false };
-			if !whitelisted {
-				// collect all the addresses which have changed.
-				let addresses = self.cache.borrow().iter().map(|(addr, _)| addr.clone()).collect::<Vec<_>>();
-
-				for a in &addresses {
-					if self.code(a).map_or(false, |c| c.sha3() == broken_dao) {
-						// Figure out if the balance has been reduced.
-						let maybe_original = self.trie_factory
-							.readonly(self.db.as_hashdb(), &self.root)
-							.expect(SEC_TRIE_DB_UNWRAP_STR)
-							.get(&a).map(Account::from_rlp);
-						if maybe_original.map_or(false, |original| *original.balance() > self.balance(a)) {
-							return Err(Error::Transaction(TransactionError::DAORescue));
-						}
-					}
-				}
-			}
-		}
-
 		// TODO uncomment once to_pod() works correctly.
 //		trace!("Applied transaction. Diff:\n{}\n", state_diff::diff_pod(&old, &self.to_pod()));
 		self.commit();
diff --git a/rpc/src/v1/impls/mod.rs b/rpc/src/v1/impls/mod.rs
index 50fa0fa1a..0f09035ed 100644
--- a/rpc/src/v1/impls/mod.rs
+++ b/rpc/src/v1/impls/mod.rs
@@ -170,7 +170,6 @@ fn transaction_error(error: EthcoreError) -> Error {
 				format!("Transaction cost exceeds current gas limit. Limit: {}, got: {}. Try decreasing supplied gas.", limit, got)
 			},
 			InvalidGasLimit(_) => "Supplied gas is beyond limit.".into(),
-			DAORescue => "Transaction removes funds from a DAO.".into(),
 		};
 		Error {
 			code: ErrorCode::ServerError(error_codes::TRANSACTION_ERROR),