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Fix MaxFeeBidMultipleBips to respect rbf minimums [NIT-2371] #2199

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merged 4 commits into from
Mar 25, 2024
Merged

Fix MaxFeeBidMultipleBips to respect rbf minimums [NIT-2371] #2199

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df0dd50
Fix MaxFeeBidMultipleBips to respect rbf minimums
PlasmaPower Mar 22, 2024
c38a0ee
Fix MaxFeeBidMultipleBips == 0
PlasmaPower Mar 22, 2024
6bd2721
Add backtrace to help debug flaky relay test
PlasmaPower Mar 22, 2024
7911fae
Merge branch 'master' into rbf-max-multiple
Tristan-Wilson Mar 25, 2024
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21 changes: 15 additions & 6 deletions arbnode/dataposter/data_poster.go
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Original file line number Diff line number Diff line change
Expand Up @@ -583,13 +583,8 @@ func (p *DataPoster) feeAndTipCaps(ctx context.Context, nonce uint64, gasLimit u
blobGasUsed := params.BlobTxBlobGasPerBlob * numBlobs
currentBlobCost := arbmath.BigMulByUint(currentBlobFee, blobGasUsed)
currentNonBlobCost := arbmath.BigMulByUint(currentNonBlobFee, gasLimit)
currentTotalCost := arbmath.BigAdd(currentBlobCost, currentNonBlobCost)
if config.MaxFeeBidMultipleBips > 0 {
targetMaxCost = arbmath.BigMin(targetMaxCost, arbmath.BigMulByBips(currentTotalCost, config.MaxFeeBidMultipleBips))
}

newBlobFeeCap := arbmath.BigMul(targetMaxCost, currentBlobFee)
newBlobFeeCap.Div(newBlobFeeCap, currentTotalCost)
newBlobFeeCap.Div(newBlobFeeCap, arbmath.BigAdd(currentBlobCost, currentNonBlobCost))
if lastTx != nil && lastTx.BlobGasFeeCap() != nil {
newBlobFeeCap = arbmath.BigMax(newBlobFeeCap, arbmath.BigMulByBips(lastTx.BlobGasFeeCap(), minRbfIncrease))
}
Expand All @@ -606,6 +601,20 @@ func (p *DataPoster) feeAndTipCaps(ctx context.Context, nonce uint64, gasLimit u
newBlobFeeCap = arbmath.BigDivByUint(newBlobCost, blobGasUsed)
}

if config.MaxFeeBidMultipleBips > 0 {
// Limit the fee caps to be no greater than max(MaxFeeBidMultipleBips, minRbf)
maxNonBlobFee := arbmath.BigMulByBips(currentNonBlobFee, config.MaxFeeBidMultipleBips)
if lastTx != nil {
maxNonBlobFee = arbmath.BigMax(maxNonBlobFee, arbmath.BigMulByBips(lastTx.GasFeeCap(), minRbfIncrease))
}
maxBlobFee := arbmath.BigMulByBips(currentBlobFee, config.MaxFeeBidMultipleBips)
if lastTx != nil && lastTx.BlobGasFeeCap() != nil {
maxBlobFee = arbmath.BigMax(maxBlobFee, arbmath.BigMulByBips(lastTx.BlobGasFeeCap(), minRbfIncrease))
}
newBaseFeeCap = arbmath.BigMin(newBaseFeeCap, maxNonBlobFee)
newBlobFeeCap = arbmath.BigMin(newBlobFeeCap, maxBlobFee)
}

if arbmath.BigGreaterThan(newTipCap, newBaseFeeCap) {
log.Info(
"reducing new tip cap to new basefee cap",
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