From 4dca5d4db7fc2c1fac5a2e24dcc99b15573f0188 Mon Sep 17 00:00:00 2001
From: Jeffrey Wilcke <jeffrey@ethereum.org>
Date: Wed, 2 Nov 2016 13:44:13 +0100
Subject: core/types, params: EIP#155

---
 params/config.go | 36 ++++++++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 4 deletions(-)

(limited to 'params')

diff --git a/params/config.go b/params/config.go
index 684e4dc42..d63236ef8 100644
--- a/params/config.go
+++ b/params/config.go
@@ -28,18 +28,24 @@ import (
 // that any network, identified by its genesis block, can have its own
 // set of configuration options.
 type ChainConfig struct {
+	ChainId *big.Int `json:"chainId"` // Chain id identifies the current chain and is used for replay protection
+
 	HomesteadBlock *big.Int `json:"homesteadBlock"` // Homestead switch block (nil = no fork, 0 = already homestead)
 	DAOForkBlock   *big.Int `json:"daoForkBlock"`   // TheDAO hard-fork switch block (nil = no fork)
 	DAOForkSupport bool     `json:"daoForkSupport"` // Whether the nodes supports or opposes the DAO hard-fork
 
 	// EIP150 implements the Gas price changes (https://github.com/ethereum/EIPs/issues/150)
-	EIP150Block *big.Int    `json:"EIP150Block"` // EIP150 HF block (nil = no fork)
-	EIP150Hash  common.Hash `json:"EIP150Hash"`  // EIP150 HF hash (fast sync aid)
+	EIP150Block *big.Int    `json:"eip150Block"` // EIP150 HF block (nil = no fork)
+	EIP150Hash  common.Hash `json:"eip150Hash"`  // EIP150 HF hash (fast sync aid)
 
-	EIP158Block *big.Int `json:"EIP158Block"` // EIP158 HF block
+	EIP155Block *big.Int `json:"eip155Block"` // EIP155 HF block
+	EIP158Block *big.Int `json:"eip158Block"` // EIP158 HF block
 }
 
-var TestChainConfig = &ChainConfig{new(big.Int), new(big.Int), true, new(big.Int), common.Hash{}, new(big.Int)}
+var (
+	TestChainConfig = &ChainConfig{big.NewInt(1), new(big.Int), new(big.Int), true, new(big.Int), common.Hash{}, new(big.Int), new(big.Int)}
+	TestRules       = TestChainConfig.Rules(new(big.Int))
+)
 
 // IsHomestead returns whether num is either equal to the homestead block or greater.
 func (c *ChainConfig) IsHomestead(num *big.Int) bool {
@@ -75,6 +81,14 @@ func (c *ChainConfig) IsEIP150(num *big.Int) bool {
 
 }
 
+func (c *ChainConfig) IsEIP155(num *big.Int) bool {
+	if c.EIP155Block == nil || num == nil {
+		return false
+	}
+	return num.Cmp(c.EIP155Block) >= 0
+
+}
+
 func (c *ChainConfig) IsEIP158(num *big.Int) bool {
 	if c.EIP158Block == nil || num == nil {
 		return false
@@ -82,3 +96,17 @@ func (c *ChainConfig) IsEIP158(num *big.Int) bool {
 	return num.Cmp(c.EIP158Block) >= 0
 
 }
+
+// Rules wraps ChainConfig and is merely syntatic sugar or can be used for functions
+// that do not have or require information about the block.
+//
+// Rules is a one time interface meaning that it shouldn't be used in between transition
+// phases.
+type Rules struct {
+	ChainId                                   *big.Int
+	IsHomestead, IsEIP150, IsEIP155, IsEIP158 bool
+}
+
+func (c *ChainConfig) Rules(num *big.Int) Rules {
+	return Rules{ChainId: new(big.Int).Set(c.ChainId), IsHomestead: c.IsHomestead(num), IsEIP150: c.IsEIP150(num), IsEIP155: c.IsEIP155(num), IsEIP158: c.IsEIP158(num)}
+}
-- 
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