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feat(rollup-relayer): add blob fee tolerance #1773

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Merged
yiweichi merged 5 commits into from
Dec 3, 2025
Merged

feat(rollup-relayer): add blob fee tolerance #1773

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1f3cbe5
feat(rollup-relayer): add blob fee tolerance
yiweichi Dec 3, 2025
3bca492
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yiweichi Dec 3, 2025
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yiweichi Dec 3, 2025
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yiweichi Dec 3, 2025
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chore: auto version bump [bot]
yiweichi Dec 3, 2025
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3 changes: 2 additions & 1 deletion rollup/conf/config.json
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,8 @@
"min_batches": 1,
"max_batches": 6,
"timeout": 7200,
"backlog_max": 75
"backlog_max": 75,
"blob_fee_tolerance": 10000000000
},
"gas_oracle_config": {
"min_gas_price": 0,
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5 changes: 5 additions & 0 deletions rollup/internal/config/relayer.go
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Expand Up @@ -48,6 +48,11 @@ type BatchSubmission struct {
TimeoutSec int64 `json:"timeout"`
// The maximum number of pending batches to keep in the backlog.
BacklogMax int64 `json:"backlog_max"`
// BlobFeeTolerance is the absolute tolerance (in wei) added to the target blob fee.
// If the current fee is below target + tolerance, we proceed with submission.
// This prevents skipping submission when the price difference is negligible (e.g., 1 wei).
// Recommended value: 10 gwei (10000000000 wei).
BlobFeeTolerance uint64 `json:"blob_fee_tolerance"`
}

// ChainMonitor this config is used to get batch status from chain_monitor API.
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12 changes: 8 additions & 4 deletions rollup/internal/controller/relayer/l2_relayer.go
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Expand Up @@ -1255,16 +1255,20 @@ func (r *Layer2Relayer) skipSubmitByFee(oldest time.Time, metrics *l2RelayerMetr
target := calculateTargetPrice(windowSec, r.batchStrategy, oldest, hist)
current := hist[len(hist)-1]

// apply absolute tolerance offset to target
tolerance := new(big.Int).SetUint64(r.cfg.BatchSubmission.BlobFeeTolerance)
threshold := new(big.Int).Add(target, tolerance)

currentFloat, _ := current.Float64()
targetFloat, _ := target.Float64()
metrics.rollupL2RelayerCurrentBlobPrice.Set(currentFloat)
metrics.rollupL2RelayerTargetBlobPrice.Set(targetFloat)

// if current fee > target and still inside the timeout window, skip
if current.Cmp(target) > 0 && time.Since(oldest) < time.Duration(windowSec)*time.Second {
// if current fee > threshold (target + tolerance) and still inside the timeout window, skip
if current.Cmp(threshold) > 0 && time.Since(oldest) < time.Duration(windowSec)*time.Second {
return true, fmt.Errorf(
"blob-fee above target & window not yet passed; current=%s target=%s age=%s",
current.String(), target.String(), time.Since(oldest),
"blob-fee above threshold & window not yet passed; current=%s target=%s threshold=%s tolerance=%s age=%s",
current.String(), target.String(), threshold.String(), tolerance.String(), time.Since(oldest),
)
}

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