/
fork.go
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/
fork.go
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// Copyright 2019 The klaytn Authors
// This file is part of the klaytn library.
//
// The klaytn 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 klaytn 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 klaytn library. If not, see <http://www.gnu.org/licenses/>.
package fork
import (
"errors"
"math/big"
"github.com/klaytn/klaytn/log"
"github.com/klaytn/klaytn/params"
)
var (
// hardForkBlockNumberConfig contains only hardFork block number
hardForkBlockNumberConfig *params.ChainConfig
logger = log.NewModuleLogger(log.FORK)
)
// Rules returns the hard fork information
// CAUTIOUS: Use it when chainConfig value is not reachable
func Rules(blockNumber *big.Int) *params.Rules {
if hardForkBlockNumberConfig == nil {
logger.Crit("fork.Rules should never be called before hardForkBlockNumberConfig initialization.")
}
rules := hardForkBlockNumberConfig.Rules(blockNumber)
return &rules
}
// SetHardForkBlockNumberConfig sets values in HardForkConfig if it is not nil.
// CAUTIOUS: Calling this function is can be dangerous, so avoid using it except tests
func SetHardForkBlockNumberConfig(h *params.ChainConfig) error {
// ensure that the allocation is done only when h is not nil
if h == nil {
return errors.New("hardForkBlockNumberConfig cannot be initialized as nil")
}
hardForkBlockNumberConfig = h
return nil
}
// ClearHardForkBlockNumberConfig sets nil
// Use only in tests
func ClearHardForkBlockNumberConfig() {
hardForkBlockNumberConfig = nil
}