1 files changed, 33 insertions, 0 deletions
diff --git a/params/util.go b/params/util.go
new file mode 100644
index 000000000..6a49a2013
--- /dev/null
+++ b/params/util.go
@@ -0,0 +1,33 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package params
+
+import "math/big"
+
+var (
+	TestNetHomesteadBlock = big.NewInt(494000)    // testnet homestead block
+	MainNetHomesteadBlock = big.NewInt(1150000)   // mainnet homestead block
+	HomesteadBlock        = MainNetHomesteadBlock // homestead block used to check against
+)
+
+func IsHomestead(blockNumber *big.Int) bool {
+	// for unit tests TODO: flip to true after homestead is live
+	if blockNumber == nil {
+		return false
+	}
+	return blockNumber.Cmp(HomesteadBlock) >= 0
+}