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txpool: honour nonce while sorting txs (#737)

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In context of https://github.com/ledgerwatch/erigon/issues/5694, this PR
fixes the tx ordering logic in the txpool. Also, a relevant change in
erigon is made here: https://github.com/ledgerwatch/erigon/pull/6051.

When the mining module used to query the best transactions, the response
of transactions weren't sorted according to nonce (for same sender
address). This caused the execution to fail (except 1). The txpool
orders the transactions using this underlying `better()` and `worse()`
functions. The `better()` function didn't have a nonce check for the
pending pool, while the `worse()` function had. This PR adds a check
which would compare and put a transaction with lower nonce ahead.

Moreover, on further investigation, these checks were applied for all
types of transactions. It only makes sense compare the nonce for
transactions which has same sender account. Hence, this PR also adds an
additional check along with.
This commit is contained in:
Manav Darji 2022-11-16 13:27:17 +05:30 committed by GitHub
parent b0cda9f301
commit 07fa94278f
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10
txpool/pool.go
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@ -2231,6 +2231,16 @@ func (mt *metaTx) better(than *metaTx, pendingBaseFee uint256.Int) bool {
if effectiveTip.Cmp(&thanEffectiveTip) != 0 {
return effectiveTip.Cmp(&thanEffectiveTip) > 0
}
// Compare nonce and cumulative balance. Just as a side note, it doesn't
// matter if they're from same sender or not because we're comparing
// nonce distance of the sender from state's nonce and not the actual
// value of nonce.
if mt.nonceDistance != than.nonceDistance {
return mt.nonceDistance < than.nonceDistance
}
if mt.cumulativeBalanceDistance != than.cumulativeBalanceDistance {
return mt.cumulativeBalanceDistance < than.cumulativeBalanceDistance
}
case BaseFeeSubPool:
if mt.minFeeCap.Cmp(&than.minFeeCap) != 0 {
return mt.minFeeCap.Cmp(&than.minFeeCap) > 0