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TxSel avoid L1CoordTx for L2Tx that have a L1UserTx in the frozen queue

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For the L2Txs of TransferToEthAddr & TransferToBJJ for a not-yet
existing accounts, in the TxSelector check if L2Tx receiver account will
be created by a L1UserFrozenTxs (in the next batch, the current frozen
queue). In that case, the L2Tx will be discarded at the current batch,
even if there is an AccountCreationAuth for the account, as there is a
L1UserTx in the frozen queue that will create the receiver Account.  The
L2Tx is discarded to avoid the Coordinator creating a new
L1CoordinatorTx to create the receiver account, which will be also
created in the next batch from the L1UserFrozenTx, ending with the user
having 2 different accounts for the same TokenID.
The double account creation is supported by the Hermez zkRollup
specification, but it was decided to mitigate it at the TxSelector level
for the explained cases.
This commit is contained in:
arnaucube
2021-03-30 13:24:40 +02:00
parent 3fedcb7023
commit 6f1a44df02
7 changed files with 265 additions and 65 deletions
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19
coordinator/pipeline.go
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@@ -523,15 +523,30 @@ func (p *Pipeline) forgeBatch(batchNum common.BatchNum) (batchInfo *BatchInfo,
if err != nil {
return nil, nil, tracerr.Wrap(err)
}
// l1UserFutureTxs are the l1UserTxs that are not being forged
// in the next batch, but that are also in the queue for the
// future batches
l1UserFutureTxs, err := p.historyDB.GetUnforgedL1UserFutureTxs(p.state.lastForgeL1TxsNum + 1)
if err != nil {
return nil, nil, tracerr.Wrap(err)
}
coordIdxs, auths, l1UserTxs, l1CoordTxs, poolL2Txs, discardedL2Txs, err =
p.txSelector.GetL1L2TxSelection(p.cfg.TxProcessorConfig, _l1UserTxs)
p.txSelector.GetL1L2TxSelection(p.cfg.TxProcessorConfig, _l1UserTxs, l1UserFutureTxs)
if err != nil {
return nil, nil, tracerr.Wrap(err)
}
} else {
// get l1UserFutureTxs which are all the l1 pending in all the
// queues
l1UserFutureTxs, err := p.historyDB.GetUnforgedL1UserFutureTxs(p.state.lastForgeL1TxsNum) //nolint:gomnd
if err != nil {
return nil, nil, tracerr.Wrap(err)
}
// 2b: only L2 txs
coordIdxs, auths, l1CoordTxs, poolL2Txs, discardedL2Txs, err =
p.txSelector.GetL2TxSelection(p.cfg.TxProcessorConfig)
p.txSelector.GetL2TxSelection(p.cfg.TxProcessorConfig, l1UserFutureTxs)
if err != nil {
return nil, nil, tracerr.Wrap(err)
}