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accounts/abi/bind/backend, internal/ethapi: recap gas limit with balance (#21043)

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* accounts/abi/bind/backend, internal/ethapi: recap gas limit with balance

* accounts, internal: address comment and fix lint

* accounts, internal: extend log message

* tiny nits to format hexutil.Big and nil properly

Co-authored-by: Péter Szilágyi <peterke@gmail.com>
This commit is contained in:
gary rong
2020-05-11 16:08:20 +08:00
committed by GitHub
parent e29e4c2376
commit 263622f44f
3 changed files with 120 additions and 4 deletions
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22
accounts/abi/bind/backends/simulated.go
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@ -39,6 +39,7 @@ import (
"github.com/ethereum/go-ethereum/eth/filters"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rpc"
)
@ -401,6 +402,27 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
} else {
hi = b.pendingBlock.GasLimit()
}
// Recap the highest gas allowance with account's balance.
if call.GasPrice != nil && call.GasPrice.Uint64() != 0 {
balance := b.pendingState.GetBalance(call.From) // from can't be nil
available := new(big.Int).Set(balance)
if call.Value != nil {
if call.Value.Cmp(available) >= 0 {
return 0, errors.New("insufficient funds for transfer")
}
available.Sub(available, call.Value)
}
allowance := new(big.Int).Div(available, call.GasPrice)
if 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)
hi = allowance.Uint64()
}
}
cap = hi
// Create a helper to check if a gas allowance results in an executable transaction