The core protocol of WoopChain
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woop/node/staking.go

118 lines
4.4 KiB

package node
import (
"crypto/ecdsa"
"math/big"
"os"
"github.com/harmony-one/harmony/core"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/harmony-one/harmony/internal/utils/contract"
"github.com/harmony-one/harmony/internal/utils"
"github.com/ethereum/go-ethereum/common/hexutil"
)
//constants related to staking
//The first four bytes of the call data for a function call specifies the function to be called.
//It is the first (left, high-order in big-endian) four bytes of the Keccak-256 (SHA-3)
//Refer: https://solidity.readthedocs.io/en/develop/abi-spec.html
const (
funcSingatureBytes = 4
lockPeriodInEpochs = 3 // This should be in sync with contracts/StakeLockContract.sol
)
// StakeInfo is the struct for the return value of listLockedAddresses func in stake contract.
type StakeInfo struct {
LockedAddresses []common.Address
BlockNums []*big.Int
LockPeriodCounts []*big.Int // The number of locking period the token will be locked.
Amounts []*big.Int
}
// UpdateStakingList updates staking information by querying the staking smart contract.
func (node *Node) UpdateStakingList(stakeInfo *StakeInfo) {
node.CurrentStakes = make(map[common.Address]*big.Int)
if stakeInfo != nil {
for i, addr := range stakeInfo.LockedAddresses {
blockNum := stakeInfo.BlockNums[i]
lockPeriodCount := stakeInfo.LockPeriodCounts[i]
amount := stakeInfo.Amounts[i]
startEpoch := core.GetEpochFromBlockNumber(blockNum.Uint64())
curEpoch := core.GetEpochFromBlockNumber(node.blockchain.CurrentBlock().NumberU64())
if startEpoch == curEpoch {
continue // The token are counted into stakes at the beginning of next epoch.
}
if curEpoch-startEpoch <= lockPeriodCount.Uint64()*lockPeriodInEpochs {
node.CurrentStakes[addr] = amount
}
}
}
}
func (node *Node) printStakingList() {
utils.GetLogInstance().Info("\n")
utils.GetLogInstance().Info("CURRENT STAKING INFO [START] ------------------------------------")
for addr, stake := range node.CurrentStakes {
utils.GetLogInstance().Info("", "Address", addr, "Stake", stake)
}
utils.GetLogInstance().Info("CURRENT STAKING INFO [END} ------------------------------------")
utils.GetLogInstance().Info("\n")
}
//The first four bytes of the call data for a function call specifies the function to be called.
//It is the first (left, high-order in big-endian) four bytes of the Keccak-256 (SHA-3)
//Refer: https://solidity.readthedocs.io/en/develop/abi-spec.html
func decodeStakeCall(getData []byte) int64 {
value := new(big.Int)
value.SetBytes(getData[funcSingatureBytes:]) //Escape the method call.
return value.Int64()
}
//The first four bytes of the call data for a function call specifies the function to be called.
//It is the first (left, high-order in big-endian) four bytes of the Keccak-256 (SHA-3)
//Refer: https://solidity.readthedocs.io/en/develop/abi-spec.html
//gets the function signature from data.
func decodeFuncSign(data []byte) string {
funcSign := hexutil.Encode(data[:funcSingatureBytes]) //The function signature is first 4 bytes of data in ethereum
return funcSign
}
// LoadStakingKeyFromFile load staking private key from keyfile
// If the private key is not loadable or no file, it will generate
// a new random private key
// Currently for deploy_newnode.sh, we hard-coded the first fake account as staking account and
// it is minted in genesis block. See genesis_node.go
func LoadStakingKeyFromFile(keyfile string, accountIndex int) *ecdsa.PrivateKey {
// contract.FakeAccounts[0] gets minted tokens in genesis block of beacon chain.
key, err := crypto.HexToECDSA(contract.StakingAccounts[accountIndex].Private)
if err != nil {
utils.GetLogInstance().Error("Unable to get staking key")
os.Exit(1)
}
if err := crypto.SaveECDSA(keyfile, key); err != nil {
utils.GetLogInstance().Error("Unable to save the private key", "error", err)
os.Exit(1)
}
// TODO(minhdoan): Enable this back.
// key, err := crypto.LoadECDSA(keyfile)
// if err != nil {
// GetLogInstance().Error("no key file. Let's create a staking private key")
// key, err = crypto.GenerateKey()
// if err != nil {
// GetLogInstance().Error("Unable to generate the private key")
// os.Exit(1)
// }
// if err = crypto.SaveECDSA(keyfile, key); err != nil {
// GetLogInstance().Error("Unable to save the private key", "error", err)
// os.Exit(1)
// }
// }
return key
}