frostfs-node/pkg/innerring/processors/neofs/process_assets.go
Alex Vanin 97077294fc [#141] Fix double sidechain GAS emission on asset mint
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
2020-11-03 16:28:01 +03:00

119 lines
3.5 KiB
Go

package neofs
import (
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neofs-node/pkg/innerring/invoke"
neofsEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/neofs"
"go.uber.org/zap"
)
const (
// txLogPrefix used for balance transfer comments in balance contract.
txLogPrefix = "mainnet:"
// lockAccountLifeTime defines amount of epochs when lock account is valid.
lockAccountLifetime uint64 = 20
)
// Process deposit event by invoking balance contract and sending native
// gas in morph chain.
func (np *Processor) processDeposit(deposit *neofsEvent.Deposit) {
if !np.activeState.IsActive() {
np.log.Info("passive mode, ignore deposit")
return
}
// send transferX to balance contract
err := invoke.Mint(np.morphClient, np.balanceContract,
&invoke.MintBurnParams{
ScriptHash: deposit.To().BytesBE(),
Amount: np.converter.ToBalancePrecision(deposit.Amount()),
Comment: append([]byte(txLogPrefix), deposit.ID()...),
})
if err != nil {
np.log.Error("can't transfer assets to balance contract", zap.Error(err))
}
curEpoch := np.epochState.EpochCounter()
receiver := deposit.To()
// check if receiver already received some mint GAS emissions
// we should lock there even though LRU cache is already thread save
// we lock there because GAS transfer AND cache update must be atomic
np.mintEmitLock.Lock()
defer np.mintEmitLock.Unlock()
val, ok := np.mintEmitCache.Get(receiver.String())
if ok && val.(uint64)+np.mintEmitThreshold >= curEpoch {
np.log.Warn("double mint emission declined",
zap.String("receiver", receiver.String()),
zap.Uint64("last_emission", val.(uint64)),
zap.Uint64("current_epoch", curEpoch))
return
}
err = np.morphClient.TransferGas(receiver, np.mintEmitValue)
if err != nil {
np.log.Error("can't transfer native gas to receiver",
zap.String("error", err.Error()))
return
}
np.mintEmitCache.Add(receiver.String(), curEpoch)
}
// Process withdraw event by locking assets in balance account.
func (np *Processor) processWithdraw(withdraw *neofsEvent.Withdraw) {
if !np.activeState.IsActive() {
np.log.Info("passive mode, ignore withdraw")
return
}
if len(withdraw.ID()) < util.Uint160Size {
np.log.Error("tx id size is less than script hash size")
return
}
// create lock account
// fixme: check collision there, consider reversed script hash
lock, err := util.Uint160DecodeBytesBE(withdraw.ID()[:util.Uint160Size])
if err != nil {
np.log.Error("can't create lock account", zap.Error(err))
return
}
curEpoch := np.epochState.EpochCounter()
err = invoke.LockAsset(np.morphClient, np.balanceContract,
&invoke.LockParams{
ID: withdraw.ID(),
User: withdraw.User(),
LockAccount: lock,
Amount: np.converter.ToBalancePrecision(withdraw.Amount()),
Until: curEpoch + lockAccountLifetime,
})
if err != nil {
np.log.Error("can't lock assets for withdraw", zap.Error(err))
}
}
// Process cheque event by transferring assets from lock account back to
// reserve account.
func (np *Processor) processCheque(cheque *neofsEvent.Cheque) {
if !np.activeState.IsActive() {
np.log.Info("passive mode, ignore cheque")
return
}
err := invoke.Burn(np.morphClient, np.balanceContract,
&invoke.MintBurnParams{
ScriptHash: cheque.LockAccount().BytesBE(),
Amount: np.converter.ToBalancePrecision(cheque.Amount()),
Comment: append([]byte(txLogPrefix), cheque.ID()...),
})
if err != nil {
np.log.Error("can't transfer assets to fed contract", zap.Error(err))
}
}