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Add 20% pad to estimated gas to eth_call

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This commit is contained in:
bretep 2023-04-24 16:24:26 -07:00
parent ee67a0013d
commit d9657949ca
1 changed files with 19 additions and 7 deletions
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14
cmd/rpcdaemon/commands/eth_call.go
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@ -173,6 +173,8 @@ func (api *APIImpl) EstimateGas(ctx context.Context, argsOrNil *ethapi2.CallArgs
} else {
feeCap = libcommon.Big0
}
// Track the maximum gas based on the account's available funds and the txn feeCap.
var accountGasLimit uint64
// Recap the highest gas limit with account's available balance.
if feeCap.Sign() != 0 {
cacheView, err := api.stateCache.View(ctx, dbtx)
@ -196,7 +198,9 @@ func (api *APIImpl) EstimateGas(ctx context.Context, argsOrNil *ethapi2.CallArgs
allowance := new(big.Int).Div(available, feeCap)
// If the allowance is larger than maximum uint64, skip checking
if allowance.IsUint64() && hi > allowance.Uint64() {
if allowance.IsUint64() {
accountGasLimit = allowance.Uint64()
if hi > allowance.Uint64() {
transfer := args.Value
if transfer == nil {
transfer = new(hexutil.Big)
@ -207,6 +211,8 @@ func (api *APIImpl) EstimateGas(ctx context.Context, argsOrNil *ethapi2.CallArgs
}
}
}
// Recap the highest gas allowance with specified gascap.
if hi > api.GasCap {
log.Warn("Caller gas above allowance, capping", "requested", hi, "cap", api.GasCap)
@ -297,6 +303,12 @@ func (api *APIImpl) EstimateGas(ctx context.Context, argsOrNil *ethapi2.CallArgs
return 0, fmt.Errorf("gas required exceeds allowance (%d)", cap)
}
}
// Adds a 20% pad to the estimated gas usage, not exceeding account gas limit
// to help mitigate gas underestimations
hi = hi + hi/5
if accountGasLimit != 0 && hi > accountGasLimit {
hi = accountGasLimit
}
return hexutil.Uint64(hi), nil
}