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accounts/external, internal/ethapi: fixes for London tx signing (#23274)

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Ticket #23273 found a flaw where we were unable to sign legacy-transactions
using the external signer, even if we're still on non-london network. That's
fixed in this PR.

Additionally, I found that even when supplying all parameters, it was impossible
to sign a london-transaction on an unsynched node. It's a pretty common usecase
that someone wants to sign a transaction using an unsynced 'vanilla' node,
providing all necessary data. Our setDefaults, however, insisted on checking the
current block against the config. This PR therefore adds a case, so that if both
MaxPriorityFeePerGas and MaxFeePerGas are provided, we accept them as given.

OBS This PR fixes a regression -- on current master, we are unable to sign a
london-transaction unless the node is synched, which may break scenarios where
geth (or clef) is used as a cold wallet.

Fixes #23273
This commit is contained in:
Martin Holst Swende
2021-07-29 14:00:06 +02:00
committed by GitHub
parent 523866c2cc
commit 5c13012b56
2 changed files with 42 additions and 34 deletions
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67
internal/ethapi/transaction_args.go
View File

@ -80,40 +80,45 @@ func (args *TransactionArgs) setDefaults(ctx context.Context, b Backend) error {
}
// After london, default to 1559 unless gasPrice is set
head := b.CurrentHeader()
if b.ChainConfig().IsLondon(head.Number) && args.GasPrice == nil {
if args.MaxPriorityFeePerGas == nil {
tip, err := b.SuggestGasTipCap(ctx)
if err != nil {
return err
// If user specifies both maxPriorityfee and maxFee, then we do not
// need to consult the chain for defaults. It's definitely a London tx.
if args.MaxPriorityFeePerGas == nil || args.MaxFeePerGas == nil {
// In this clause, user left some fields unspecified.
if b.ChainConfig().IsLondon(head.Number) && args.GasPrice == nil {
if args.MaxPriorityFeePerGas == nil {
tip, err := b.SuggestGasTipCap(ctx)
if err != nil {
return err
}
args.MaxPriorityFeePerGas = (*hexutil.Big)(tip)
}
args.MaxPriorityFeePerGas = (*hexutil.Big)(tip)
}
if args.MaxFeePerGas == nil {
gasFeeCap := new(big.Int).Add(
(*big.Int)(args.MaxPriorityFeePerGas),
new(big.Int).Mul(head.BaseFee, big.NewInt(2)),
)
args.MaxFeePerGas = (*hexutil.Big)(gasFeeCap)
}
if args.MaxFeePerGas.ToInt().Cmp(args.MaxPriorityFeePerGas.ToInt()) < 0 {
return fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", args.MaxFeePerGas, args.MaxPriorityFeePerGas)
}
} else {
if args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil {
return errors.New("maxFeePerGas or maxPriorityFeePerGas specified but london is not active yet")
}
if args.GasPrice == nil {
price, err := b.SuggestGasTipCap(ctx)
if err != nil {
return err
if args.MaxFeePerGas == nil {
gasFeeCap := new(big.Int).Add(
(*big.Int)(args.MaxPriorityFeePerGas),
new(big.Int).Mul(head.BaseFee, big.NewInt(2)),
)
args.MaxFeePerGas = (*hexutil.Big)(gasFeeCap)
}
if b.ChainConfig().IsLondon(head.Number) {
// The legacy tx gas price suggestion should not add 2x base fee
// because all fees are consumed, so it would result in a spiral
// upwards.
price.Add(price, head.BaseFee)
if args.MaxFeePerGas.ToInt().Cmp(args.MaxPriorityFeePerGas.ToInt()) < 0 {
return fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", args.MaxFeePerGas, args.MaxPriorityFeePerGas)
}
} else {
if args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil {
return errors.New("maxFeePerGas or maxPriorityFeePerGas specified but london is not active yet")
}
if args.GasPrice == nil {
price, err := b.SuggestGasTipCap(ctx)
if err != nil {
return err
}
if b.ChainConfig().IsLondon(head.Number) {
// The legacy tx gas price suggestion should not add 2x base fee
// because all fees are consumed, so it would result in a spiral
// upwards.
price.Add(price, head.BaseFee)
}
args.GasPrice = (*hexutil.Big)(price)
}
args.GasPrice = (*hexutil.Big)(price)
}
}
if args.Value == nil {