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reduce the time cost of estimateGas call

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This commit is contained in:
barryz 2021-07-21 11:16:28 +08:00
parent 0c4892f728
commit 0cb867586f
1 changed files with 34 additions and 17 deletions
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51
internal/ethapi/api.go
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@ -989,7 +989,18 @@ func (s *PublicBlockChainAPI) Call(ctx context.Context, args TransactionArgs, bl
return result.Return(), result.Err
}
func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, gasCap uint64) (hexutil.Uint64, error) {
func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, gasCap uint64) (g hexutil.Uint64, e error) {
defer func(start time.Time) {
msg := []interface{}{"elapsed", common.PrettyDuration(time.Since(start))}
if e != nil {
to := ""
if args.To != nil {
to = args.To.String()
}
msg = append(msg, "to", to)
log.Debug("Execute estimateGas call finished", msg...)
}
}(time.Now())
// Binary search the gas requirement, as it may be higher than the amount used
var (
lo uint64 = params.TxGas - 1
@ -1061,6 +1072,23 @@ func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNr
}
return result.Failed(), result, nil
}
// Reject the transaction as invalid if it still fails at the highest allowance
failed, result, err := executable(hi)
if err != nil {
return 0, err
}
if failed {
if result != nil && result.Err != vm.ErrOutOfGas {
if len(result.Revert()) > 0 {
return 0, newRevertError(result)
}
return 0, result.Err
}
// Otherwise, the specified gas cap is too low
return 0, fmt.Errorf("gas required exceeds allowance (%d)", cap)
}
// Execute the binary search and hone in on an executable gas limit
for lo+1 < hi {
mid := (hi + lo) / 2
@ -1077,24 +1105,13 @@ func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNr
} else {
hi = mid
}
}
// Reject the transaction as invalid if it still fails at the highest allowance
if hi == cap {
failed, result, err := executable(hi)
if err != nil {
return 0, err
}
if failed {
if result != nil && result.Err != vm.ErrOutOfGas {
if len(result.Revert()) > 0 {
return 0, newRevertError(result)
}
return 0, result.Err
}
// Otherwise, the specified gas cap is too low
return 0, fmt.Errorf("gas required exceeds allowance (%d)", cap)
// estimate gas approximately
if hi-lo < 4000 {
break
}
}
return hexutil.Uint64(hi), nil
}