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authorJeffrey Wilcke <geffobscura@gmail.com>2015-06-30 08:22:19 +0800
committerJeffrey Wilcke <geffobscura@gmail.com>2015-06-30 08:22:19 +0800
commit7625b07dd9a2a7b5c5a504c1276eea04596ac871 (patch)
treece2a757cd4e0591fc15815b2dfae528ae517d36e /core/canary.go
parent72e2613a9fe3205fa5a67b72b832e03b2357ee88 (diff)
parent8f504063f465e0ca10c6bb53ee914d10a3d45c86 (diff)
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Merge branch 'release/0.9.34'v0.9.34
Diffstat (limited to 'core/canary.go')
-rw-r--r--core/canary.go28
1 files changed, 28 insertions, 0 deletions
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
+}