From 74368663dbab468c6d4efc4a94ecbdac25e39040 Mon Sep 17 00:00:00 2001
From: debris <marek.kotewicz@gmail.com>
Date: Wed, 9 Dec 2015 15:31:43 +0100
Subject: [PATCH] denominations and networkparams

---
 src/denominations.rs | 17 +++++++++++
 src/lib.rs           |  2 ++
 src/networkparams.rs | 71 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 90 insertions(+)
 create mode 100644 src/denominations.rs
 create mode 100644 src/networkparams.rs

diff --git a/src/denominations.rs b/src/denominations.rs
new file mode 100644
index 000000000..183e89f26
--- /dev/null
+++ b/src/denominations.rs
@@ -0,0 +1,17 @@
+use util::uint::*;
+
+#[inline]
+pub fn ether() -> U256 { U256::exp10(18) }
+
+#[inline]
+pub fn finney() -> U256 { U256::exp10(15) }
+
+#[inline]
+pub fn szabo() -> U256 { U256::exp10(12) }
+
+#[inline]
+pub fn shannon() -> U256 { U256::exp10(9) }
+
+#[inline]
+pub fn wei() -> U256 { U256::exp10(0) }
+
diff --git a/src/lib.rs b/src/lib.rs
index 8037140df..ce40bc439 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -78,6 +78,8 @@ extern crate evmjit;
 
 pub mod blockheader;
 pub mod transaction;
+pub mod networkparams;
+pub mod denominations;
 
 #[test]
 fn it_works() {
diff --git a/src/networkparams.rs b/src/networkparams.rs
new file mode 100644
index 000000000..aedadf701
--- /dev/null
+++ b/src/networkparams.rs
@@ -0,0 +1,71 @@
+use util::uint::*;
+use denominations::*;
+
+/// Network related const params
+/// TODO: make it configurable from json file
+pub struct NetworkParams {
+	maximum_extra_data_size: U256,
+	min_gas_limit: U256,
+	gas_limit_bounds_divisor: U256,
+	minimum_difficulty: U256,
+	difficulty_bound_divisor: U256,
+	duration_limit: U256,
+	block_reward: U256,
+	gas_floor_target: U256,
+	account_start_nonce: U256
+}
+
+impl NetworkParams {
+	pub fn olympic() -> NetworkParams {
+		NetworkParams {
+			maximum_extra_data_size: U256::from(1024u64),
+			min_gas_limit: U256::from(125_000u64),
+			gas_floor_target: U256::from(3_141_592u64),
+			gas_limit_bounds_divisor: U256::from(1024u64),
+			minimum_difficulty: U256::from(131_072u64),
+			difficulty_bound_divisor: U256::from(2048u64),
+			duration_limit: U256::from(8u64),
+			block_reward: finney() * U256::from(1500u64),
+			account_start_nonce: U256::from(0u64)
+		}
+	}
+
+	pub fn frontier() -> NetworkParams {
+		NetworkParams {
+			maximum_extra_data_size: U256::from(32u64),
+			min_gas_limit: U256::from(5000u64),
+			gas_floor_target: U256::from(3_141_592u64),
+			gas_limit_bounds_divisor: U256::from(1024u64),
+			minimum_difficulty: U256::from(131_072u64),
+			difficulty_bound_divisor: U256::from(2048u64),
+			duration_limit: U256::from(13u64),
+			block_reward: ether() * U256::from(5u64),
+			account_start_nonce: U256::from(0u64)
+		}
+	}
+
+	pub fn morden() -> NetworkParams {
+		NetworkParams {
+			maximum_extra_data_size: U256::from(32u64),
+			min_gas_limit: U256::from(5000u64),
+			gas_floor_target: U256::from(3_141_592u64),
+			gas_limit_bounds_divisor: U256::from(1024u64),
+			minimum_difficulty: U256::from(131_072u64),
+			difficulty_bound_divisor: U256::from(2048u64),
+			duration_limit: U256::from(13u64),
+			block_reward: ether() * U256::from(5u64),
+			account_start_nonce: U256::from(1u64) << 20
+		}
+	}
+
+	pub fn maximum_extra_data_size(&self) -> U256 { self.maximum_extra_data_size }
+	pub fn min_gas_limit(&self) -> U256 { self.min_gas_limit }
+	pub fn gas_limit_bounds_divisor(&self) -> U256 { self.gas_limit_bounds_divisor }
+	pub fn minimum_difficulty(&self) -> U256 { self.minimum_difficulty }
+	pub fn difficulty_bound_divisor(&self) -> U256 { self.difficulty_bound_divisor }
+	pub fn duration_limit(&self) -> U256 { self.duration_limit }
+	pub fn block_reward(&self) -> U256 { self.block_reward }
+	pub fn gas_floor_target(&self) -> U256 { self.gas_floor_target }
+	pub fn account_start_nonce(&self) -> U256 { self.account_start_nonce }
+}
+