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internal/ethapi, accounts/abi/bind: cap highest gas limit by account balance for 1559 fee parameters (#23309)

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* internal/ethapi/api: cap highest gas limit by account balance for 1559 fee parameters

* accounts/abi/bind: port gas limit cap for 1559 parameters to simulated backend

* accounts/abi/bind: add test for 1559 gas estimates for the simulated backend

* internal/ethapi/api: fix comment

* accounts/abi/bind/backends, internal/ethapi: unify naming style

Co-authored-by: Péter Szilágyi <peterke@gmail.com>
This commit is contained in:
lightclient
2021-08-10 07:56:34 -06:00
committed by GitHub
parent 39fe7eca6b
commit a879c42bd3
3 changed files with 52 additions and 7 deletions
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17
accounts/abi/bind/backends/simulated.go
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@ -488,8 +488,19 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
} else {
hi = b.pendingBlock.GasLimit()
}
// Normalize the max fee per gas the call is willing to spend.
var feeCap *big.Int
if call.GasPrice != nil && (call.GasFeeCap != nil || call.GasTipCap != nil) {
return 0, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
} else if call.GasPrice != nil {
feeCap = call.GasPrice
} else if call.GasFeeCap != nil {
feeCap = call.GasFeeCap
} else {
feeCap = common.Big0
}
// Recap the highest gas allowance with account's balance.
if call.GasPrice != nil && call.GasPrice.BitLen() != 0 {
if feeCap.BitLen() != 0 {
balance := b.pendingState.GetBalance(call.From) // from can't be nil
available := new(big.Int).Set(balance)
if call.Value != nil {
@ -498,14 +509,14 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
}
available.Sub(available, call.Value)
}
allowance := new(big.Int).Div(available, call.GasPrice)
allowance := new(big.Int).Div(available, feeCap)
if allowance.IsUint64() && hi > allowance.Uint64() {
transfer := call.Value
if transfer == nil {
transfer = new(big.Int)
}
log.Warn("Gas estimation capped by limited funds", "original", hi, "balance", balance,
"sent", transfer, "gasprice", call.GasPrice, "fundable", allowance)
"sent", transfer, "feecap", feeCap, "fundable", allowance)
hi = allowance.Uint64()
}
}