From b39042db5672e830ddec41ea97c642d93be61c30 Mon Sep 17 00:00:00 2001 From: Jeffrey Wilcke Date: Mon, 29 Jun 2015 12:42:47 +0200 Subject: core, miner: implemented canary --- core/canary.go | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 core/canary.go (limited to 'core/canary.go') diff --git a/core/canary.go b/core/canary.go new file mode 100644 index 000000000..de77c4bba --- /dev/null +++ b/core/canary.go @@ -0,0 +1,28 @@ +package core + +import ( + "math/big" + + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core/state" +) + +var ( + jeff = common.HexToAddress("9d38997c624a71b21278389ea2fdc460d000e4b2") + vitalik = common.HexToAddress("b1e570be07eaa673e4fd0c8265b64ef739385709") + christoph = common.HexToAddress("529bc43a5d93789fa28de1961db6a07e752204ae") + gav = common.HexToAddress("e3e942b2aa524293c84ff6c7f87a6635790ad5e4") +) + +// Canary will check the 0'd address of the 4 contracts above. +// If two or more are set to anything other than a 0 the canary +// dies a horrible death. +func Canary(statedb *state.StateDB) bool { + r := new(big.Int) + r.Add(r, statedb.GetState(jeff, common.Hash{}).Big()) + r.Add(r, statedb.GetState(vitalik, common.Hash{}).Big()) + r.Add(r, statedb.GetState(christoph, common.Hash{}).Big()) + r.Add(r, statedb.GetState(gav, common.Hash{}).Big()) + + return r.Cmp(big.NewInt(1)) > 0 +} -- cgit