45 lines
1.6 KiB
Go
45 lines
1.6 KiB
Go
// Copyright 2015 The go-ethereum Authors
|
|
// This file is part of go-ethereum.
|
|
//
|
|
// go-ethereum 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.
|
|
//
|
|
// go-ethereum 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package core
|
|
|
|
import (
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/state"
|
|
)
|
|
|
|
var (
|
|
jeff = common.HexToAddress("a8edb1ac2c86d3d9d78f96cd18001f60df29e52c")
|
|
vitalik = common.HexToAddress("1baf27b88c48dd02b744999cf3522766929d2b2a")
|
|
christoph = common.HexToAddress("60d11b58744784dc97f878f7e3749c0f1381a004")
|
|
gav = common.HexToAddress("4bb7e8ae99b645c2b7860b8f3a2328aae28bd80a")
|
|
)
|
|
|
|
// 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
|
|
}
|